1 Dana Spicer Tandem Drive Axles S400-S Service Manual AXSM-1951 September 1997 For the most current information, visit the Roadranger web site at
2 TABLE OF CONTENTS Axle Identification... 1 Model Identification Numbering System... 2 Gear Set Identification... 2 Axle Lubricant Recommendations... 3 General Precautions... 4 Components Power Divider... 5 Forward Rear... 6 Rear Rear... 7 Removal of Differential Carrier from Axle Housing... 8 Removal of Differential from Carrier... 9 Disassembly Inter-axle Differential Output Shaft Differential Pinion Cleaning and Inspection Assembly Pinion Differential Assembly (Continued) Output Shaft Inter-axle Differential Differential Installation Ring Gear and Tooth Contact Pattern Installation of Inter-axle Differential Into Carrier Yoke Removal and Seal Replacement Shift Cylinder Service Installation of Differential Carrier Into Axle Housing Axle/Torque Specifications Recommended Service Tools GENUINE SPICER SERVICE PART Should an axle assembly require replacement component parts, it is recommended that Spicer Heavy Axle Service Parts be used. Spicer Heavy Axle Service Parts are manufactured under the same rigid specification as are original equipment axle components. This assures the customer who uses genuine Spicer service parts, maximum reliability for a Spicer Heavy Axle assembly. They may be obtained through your vehicle manufacturer. The use of non-original Spicer service parts may cause premature component failure and may void the warranty. The items included in this book are currently being offered as service parts at the time of printing. The part numbers and illustrations are provided specifically for reference purposes only. Therefore, Spicer reserves the right to update this manual without notice or liability. i
3 AXLE IDENTIFICATION All axle assemblies are identified with two tags. One located on the differential carrier, and the other located on the right hand side of the axle housing. The differential carrier tag contains the following: Dana part number, julian date code, and ratio. Optional items include customer part number, line set number, and the last six digits of the vehicle serial number. JULIAN DATE TE CODE MODEL YEAR DAY OF YEAR The axle assembly tag contains the following items: Dana part number, julian date code, axle model, and ratio. Optional items include customer part number, line set number, and the last six digits of the vehicle serial number. DANA PAR ART NUMBER CUSTOMER PAR ART NUMBER (OPTIONAL) Carrier Tag LAST SIX DIGITS OF VEHICLE SERIAL NUMBER (OPTIONAL) LINE SET NUMBER (OPTIONAL) JULIAN DATE CODE DANA PAR ART NUMBER CUSTOMER PAR ART NUMBER (OPTIONAL) MODEL Axle Assembl ssembly Tag LAST SIX DIGITS OF VEHICLE SERIAL NUMBER (OPTIONAL) LINE SET NUMBER (OPTIONAL) JULIAN DATE CODE 1
4 MODEL IDENTIFICATION NUMBERING SYSTEM S 400 S N Famil amily (S = Spicer) Nominal Load Carrying Capacity (400 = 40,000 Lbs.) Gearing Type (S = Single Reduc eduction) Options (N = *No-SPIN Differential) ential) * No-SPIN is a registered trademark of Tractech GEAR SET IDENTIFICATION Date gear set was made. Company logo and location of manufacturing facility. 390GP100 (TYPICAL) SPICER TRADEMARK PINION ETCH Tooth Combination(i.e ) Indicates the pinion has 11 teeth and the ring gear has 41 teeth which results in a 3:73:1 ratio. TOOTH COMBINATION PART NUMBER HEAT CODE SPICER TRADEMARK MFG. DATE MATCHED SET NUMBER Spicer ring gears and pinions are manufactured as matched sets. Both ring gear and pinion are marked with a corresponding number (i.e. 260), which identifies them as a matched set. L A gear set that does not have the same match set numbers should not be run together. If either ring gear or pinion require replacement, a new matched set must be used. BACKLASH ETCH Indicates backlash setting for assembly. 2
5 AXLE LUBRICANT RECOMMENDATIONS To ensure proper lubrication and operating temperature, correct lubricants and lubricant levels must be obtained. RECOMMENDED LUBRICANTS Petroleum based or synthetic based hypoid gear lubricants that meet or exceed military specification MIL-L- 2105D, and API service classification GL-5, are the minimum requirements for use in Spicer Medium and Heavy Duty Drive Axles. The table below indicates which SAE viscosities are recommended for various temperature ranges the vehicle will encounter. On Highway 100,000 1 Year 250,000 3 Year Severe Service and 50,000 1 Year 100,000 1 Year On-Off Highway * Severe service includes any applications operating at or near maximum GVW or GCW ratings. This includes normally wet or dusty environment, or consistent high load and low speed applications. ** Includes Semi-Synthetic blends that meet MIL-L-2105D specifications. AMBIENT AIR TEMPERATURE SERVICE Recommended lubricant change intervals are dependent on the application and operating environment. The following chart should be used to establish proper change intervals. SUBMERSION OR DEEP WATER FORDING In the event the axle assembly should become submerged in water, particularly if over the vent or breather, it is recommended that the lubricant be drained to prevent water damage and/or contamination. The axle assembly should then be refilled with specified lubricant. AFTER OVERHAUL OR CHANGE INTERVALS Fill the axle assembly to the bottom of housing fill hole as shown in the illustration below. It is recommended that following an overhaul, each side of the axle be jacked up separately to approximately six inches and held into position for one minute. This procedure will allow adequate lubricant to flow into the wheel ends and help eliminate the possibility of premature damage to wheel bearings and seals. Lower the vehicle to the floor and allow ten minutes for lube to return to normal level. Check and refill assembly to bottom of fill hole to replace the lubricant that was directed into the wheel ends. NOTE: Lubricant close enough to the bottom of the fill hole to be seen or touched is not sufficient. Lubricant must be level with the fill hole. 3
6 GENERAL PRECAUTIONS READ THIS SECTION BEFORE STARTING ANY SERVICE PROCEDURES GENERAL AXLE DESCRIPTION The Spicer tandem rear axle assemblies consist of two heavy duty, hypoid, single reduction differential carrier assemblies. The forward axle contains a power divider, which does exactly what its name implies. It divides power between the forward rear and rear rear axle assemblies. The forward axle receives power through a set of helical gears within the power divider. The rear rear axle receives power from the power divider output shaft that extends through the forward axle housing. The complete forward axle differential carrier assembly and power divider can be removed from the axle housing as a unit. Follow the sections of this manual that cover individual service needs. Accordingly, anyone who uses a service procedure or tool different than shown must first thoroughly satisfy themselves that their safety, nor the vehicle safety, will be jeopardized by the service method selected. END YOKES AND FLANGES CAUTION: Hammering on end yokes could damage the bearing bores or misalign yoke lugs and result in early failures of journal needle bearings or other driveline components. Serious damage can also be done internally to the ring and pinion set or pinion bearings by hammering on external parts. End yokes or companion flanges should be removed or installed using the recommended method such as that described herein. SAFTEY PRECAUTIONS Proper service and repair of vehicle components is important to the safe and reliable operation of all motor vehicles. This applies particularly to driving axles such as the ones described in this manual. The procedures recommended and described in this manual are tested, and effective methods for performing service operations. Follow each procedure closely, making use of both the text and illustrations. Some of these service procedures show the use of certain tools designed specifically for the operation being performed. They are shown as a preferred means of performing the operation. It is not practical to anticipate and advise the service trade of all possible alternative methods, and of all possible hazardous consequences that could result from any particular method. 4 CLEANLINESS Axle components should be steam cleaned prior to removal from the vehicle. Dirt is abrasive and can cause premature wear of otherwise serviceable parts. Service personnel should use a wash tank for thorough cleaning of parts just prior to reassembly. CAUTION
8 FORWARD REAR COMPONENTS Flanged Hex Nut (900-1,200 Lb-Ft) (1,220-1,627 N-m) Output Yoke Assembly Output Oil Seal Beveled Retaining Ring Output Shaft Bearing Output Shaft Axle Shaft ( Roadside ) Fill Plug (35-45 Lb-Ft) (47-61 N-m) Temperature Sensor Plug (35-45 Lb-Ft) (47-61 N-m) Vent Plug Differential Side Bearing Cap Axle Housing Dowel Pin Differential Gear Thrust Washer Differential Bearing Cap Bolt ( Lb-Ft) ( N-m) Flat Washer Adjusting RingLock Adjusting Ring Lock Bolt (30-40 Lb-Ft) (41-54 N-m) Magnetic Drain Plug (35-45 Lb-Ft) (47-61 N-m) Differential Case Flange Half Flat Washer Nut ( Lb-Ft) ( N-m) Adjusting Ring Differential Bearing Cone Differential Bearing Cup Ring Gear Bolt Ring Gear Hex Bolt (150 Max. Lb-Ft) (203 Max. N-m) Pinion Pilot Bearing Cap Pinion Pilot Bearing Pinion Differential Side Gear Differential Cross Shaft Differential Pinion Mate Differential Pinion Mate Thrust Washer Differential Case Bolt ( Lb-Ft) ( N-m) Differential Case Cap Half Axle Shaft ( Curbside ) Inner Pinion Bearing Cone Inner PinionBearing Cup Pinion Bearing Spacer (selective) Carrier Housing Carrier Mounting Bolt ( Lb-Ft) ( N-m) Outer Pinion Bearing Cone Helical Driven Gear Dowel Pin Flanged Hex Nut ( Lb-Ft) (1,220-1,627 N-m) Outer Pinion Bearing Cup 6
9 REAR REAR COMPONENTS Housing Vent Plug Axle Shaft ( Roadside ) Fill Plug (35-45 Lb-Ft) (47-61 N-m) Differential Bearing Cap Temperature Sensor Plug (35-45 Lb-Ft) (47-61 N-m) Dowel Pin Differential Bearing Cap Bolt ( Lb-Ft) ( N-m) Differential Bearing Cap Washer Adjusting Ring Lock Magnetic Drain Plug (35-45 Lb-Ft) (47-61 N-m) Differntial Pinion Mate Thrust Washer Differential Pinion Mate Differential Cross Shaft Differential Bearing Cone Adjusting Ring Lock Bolt (30-40 Lb-Ft) (41-54 N-m) Differential Side Gear Differential Case Cap Half Differential Gear Thrust Washer Differential Case Bolt ( Lb-Ft) ( N-m) Differential Bearing Cup Adjusting Ring Pinion Pilot Bearing Cap Ring Gear Ring Gear Bolt Hex Bolt (150 Max. Lb-Ft) (203 Max. N-m) Pinion Pilot Bearing Pinion Nut ( Lb-Ft) ( N-m) Ring Gear Flat Washer Differential Case Flange Half Inner PinionBearing Cone Inner Pinion Bearing Cup Axle Shaft ( Curbside ) Carrier Housing Pinion Bearing Preload Spacer (Selective) Outer Pinion Bearing Cup Outer Pinion Bearing Cone 7 Carrier Mounting Bolt ( Lb-Ft) ( N-m) Pinion Oil Seal End Yoke Assembly Flanged Hex Nut (900-1,200 Lb-Ft) (1,220-1,627 N-m)
10 REMOVAL OF DIFFERENTIAL CARRIERS FROM AXLE HOUSINGS Block wheels. Remove axle housing and power divider drain plugs and drain lubricant. Disconnect drive shaft at the rear U-joint. Separate differential carrier from the housing using removal slots. and. Be certain differential carrier clears dowel pins and is balanced properly on jack. Remove top two carrier mounting bolts, and remove differential carrier assembly from the axle housing. Match mark each axle shaft flange to its mating wheel end and remove axle shaft flange nuts. Hold a large brass drift or a brass hammer against the center of the axle shaft flange. Strike the drift with sharp blows from a large hammer or sledge until the axle shaft separates from the hub. igure 1 Remove axle shafts. Disconnect air line from power divider shift cover on forward rear assembly. Support the differential carrier assembly on a roller jack. Secure as necessary to prevent it from falling off the jack when removed from the housing. Loosen the differential carrier-to-housing mounting bolts. Remove all bolts except top two. These two bolts will prevent the carrier assembly from falling. igure e 2 Mount carrier assembly in a suitable rebuild stand. (Refer to, pgs ) 8
11 The following service procedures apply for both forward rear and rear rear axles, unless otherwise noted. REMOVAL OF DIFFERENTIAL FROM CARRIER Remove adjusting ring bolts and locks from bearing caps. One differential bearing cap and leg of the carrier is match marked to aid during reassembly.. Loosen four bearing cap retaining bolts. Loosen adjusting rings, to relieve bearing preload. Remove four bearing cap retaining bolts and washers. Remove bearing caps. Remove adjusting rings and bearing cups. igure 3 Carefully lift the ring gear and differential subassembly out of carrier. 9
12 INTER-AXLE DIFFERENTIAL DISASSEMBLY Fill Plug (35-45 Lb-Ft) (47-61 N-m) Inter-axle Differential Case Bearing Cup Bearing Cone Inter-axle Differential Side Gear Inter-axle Differential Assembly Helical Drive Gear Bolt ( Lb-Ft) ( N-m) Needle Bearing Needle Bearing Thrust Washer Assembly Drain Plug (35-45 Lb-Ft) (47-61 N-m) Lube Retainer Washer Bolt (20-25 Lb-Ft) (27-34 N-m) Input Shaft Clutch Collar Bearing Cone Bearing Cup Shift Fork Shim (Selective) Input Shaft Bearing Retainer Spring Spacer Seal Shift Shaft Piston Assembly Shift Cover O-ring Shift Cover Washer Shift Cover Bolt (15-20 Lb-Ft) (20-27 N-m) Bolt ( Lb-Ft) ( N-m) Input Yoke Assembly Flanged Hex Nut (900-1,200 Lb-Ft) (1,220-1,627 N-m) Remove intermediate case to carrier bolts. Use removal slots to seperate inter-axle differential case from carrier. With inter-axle differential assembly removed, remove four bolts and washers of shift cylinder. Remove shift cylinder cap and piston. Remove shift cylinder shaft. Remove flanged hex nut. igure 4 10
13 INTER-AXLE DIFFERENTIAL DISASSEMBLY Remove input yoke using a suitable puller. Remove input oil seal Press out input shaft bearing cup from bearing retainer. Retain shims for possible use during reassembly. Early models were not a press fit. Remove input shaft assembly. Remove input yoke spacer from input shaft. Remove front bearing cone from input shaft using suitable puller. Remove clutch collar, shift fork, and spring from assembly. Remove needle thrust bearing assembly from top of drive gear. igure 5 Remove bolts from input shaft bearing retainer. Use removal slots to seperate bearing retainer from inter-axle differential case, and remove retainer. Remove drive gear from inter-axle differential case. Remove two lube retainer bolts. Remove lube retainer. Remove inter-axle differential assembly from case. Remove rear Diff-gear from inter-axle differential case. Remove rear bearing cup from intermediate case. Remove bearing cone from rear differential gearusing a suitable puller. Clean and inspect all components for excessive wear, scoring, or cracks. Replace damaged components with original equipment replacement parts and prepare for reassembly. igure 6 11
14 OUTPUT SHAFT DISASSEMBLY Flanged Hex Nut (900-1,200 Lb-Ft) (1,220-1,627 N-m) End Yoke Output Oil Seal Beveled Retaining Ring Output Shaft Bearing Output Shaft Housing Remove the inter-axle drive shaft. Remove output flanged hex nut. Remove output yoke using a suitable puller. Remove oil seal. Remove beveled retaining ring. Place output shaft remover adapter into housing bore. Thread yoke installer service tool onto output shaft. Tighten nut on yoke installer to pull output shaft bearing assembly out of housing. If output shaft bearing is to be replaced, remove old bearing using a suitable puller or press. igure 7 12
15 DIFFERENTIAL DISASSEMBLY Bearing Cup Bearing Cone Pinion Mate Thrust Washer Differential Cross Shaft Flange Half Differential Case Flat Washer Nut ( Lb-Ft) ( N-m) Bearing Cup Ring Gear Bolt Differential Pinion Mate Gear Thrust Washer Differential Gear Differential Case Bolt ( Lb-Ft) ( N-m) Plain Half Differential Case Bearing Cone Match mark differential case halves with a punch or chisel for correct alignment in reassembly. igure e 8 Remove differential case bolts and lift off the differential case half. Remove thrust washer and differential gear. Lift out cross shaft, pinion mates and pinion mate thrust washers. Remove second differential gear and thrust washer. If differential bearings are to be replaced, remove old bearings using a suitable puller. 13 igure 9 When it is necessary to remove ring gear from differential case, carefully loosen ring gear nuts with breaker bar in an alternating pattern and remove. Inspect ring gear, ring gear bolts, and ring gear bolt holes for nicks, excessive wear, and irregularities.
16 PINION DISASSEMBLY Remove flanged hex nut. Remove end yoke on the rear rear axle using a suitable puller. Refer to, pgs ). Remove the oil seal on the rear rear axle and discard. Remove the four pinion pilot bearing support bolts. Remove the pinion pilot bearing support. Place carrier in press with threaded end of pinion face up. Place a wooden block under pinion to avoid damage of gear teeth during removal. Pinion removal - On the, press the pinion through the helical driven gear and inner and outer bearing cones. On the, press the pinion through the inner and outer bearing cones. Remove the pinion from the bottom of the carrier. Remove bearing preload spacer and save for use in reassembly. If the gearset is to be reused, remove inner pinion bearing with a suitable puller at this time. If the gear set is to be replaced new bearings must be installed. If bearings are to be replaced, press bearing cups out of carrier casting at this time. Remove pinion pilot bearing with a suitable puller. igure e 10 igure 10A 14
17 CLEANING NOTE: Alkaline type solutions may cause damage to machined surfaces and should be avoided. Parts should be cleaned with emulsion cleaners or petroleum base cleaning solvent. Make sure interior of axle housing is clean prior to reassembly. Clean all gasket surfaces of old material. GEARS CLEANING AND INSPECTION DRYING Use soft, clean, lintless towels or rags to dry components after cleaning. Bearings should not be dried by spinning with compressed air. This can damage mating surfaces due to the lack of lubrication. After drying, parts should be coated with a light coat of lubricant or rust inhibitor to prevent damage from corrosion. If parts are to be stored for a prolonged period, they should be wrapped in wax paper. INSPECTION Prior to reassembly, inspect parts for signs of excessive wear or damage. Replacement of these parts can prevent premature failure and costly downtime. Inspect gears for excessive wear or damage. Replace gears that are pitted, scored, broken, or worn. SHAFTS Inspect shafts for nicks or scoring. SPLINES BEARINGS Bearing surfaces should be inspected for pitting, excessive wear, or overheating. Inspect all splines for excessive wear, distortion from twisting, and cracking. HOUSINGS THRUST WASHERS Inspect thrust washers for scoring and cracking. 15 Inspect housing for stripped threads and bending fatigue.
18 PINION ASSEMBLY Stake pilot bearing in nine places using a center punch or equivalent tool. Press inner and outer bearing cups into the carrier igure 11 Press inner bearing cone onto pinion. Press pinion pilot bearing onto the pinion. igure 14 until seated. Use a feeler gauge (.0015 inch) to make sure that bearing cups are fully seated in bearing bores. Apply hypoid gear lubricant to both cup and cone. igure e 12 igure e 15 igure 13 16
19 PINION ASSEMBLY Place carrier housing in press with the pinion supported by wood block (6"X6"X6"), so the inner pinion bearing is mated to the cup. Insert original preload spacer and outer pinion bearing onto pinion. Press outer pinion bearing onto pinion until completely seated. On forward rear, press driven gear onto pinion. On rear rear carrier, inspect end yoke or companion flange, for grooves in seal surface. If grooves can be igure ,200 Lb-Ft (1,220-1,627 N-m). Install pinion pilot bearing cap. Tighten and torque four bolts to 150 Lb-Ft (203 N-m). Measure torque to rotate with an inch-pound torque wrench. Make eight revolutions, taking a torque measurement every fourth revolution. It should read between lb-in of bearing preload..001 inch change in preload spacer will change torque to rotate approximately 30 lb-in. igure e 16 detected with finger-nail, then end yoke must be repaired with a C/R approved repair sleeve or replaced. Use yoke installer service tool and install yoke without seal. Use torque multiplier and torque flanged hex nut to 17 igure 18
20 PINION ASSEMBLY Pinion bearing preload spacers are available in the following thicknesses: Always measure each spacer before assembly to ensure correct thickness. Repeat process until torque to rotate is between lb-in after preload is achieved, remove yoke and install new seal with proper service tool. Install yoke using yoke installer (See, pgs ) Apply Loctite #680 (green) to threads. Use torque multiplier and torque flanged hex nut to 900-1,200 Lb-ft (1,220-1,627 N-m). 18
21 DIFFERENTIAL ASSEMBLY Bearing Cup Bearing Cone Flange Half Differential Case Flat Washer Nut ( Lb-Ft) ( N-m) Bearing Cup Ring Gear Pinion Mate Thrust Washer Differential Cross Shaft Bolt Differential Pinion Mate Gear Thrust Washer Differential Case Bolt ( Lb-Ft) ( N-m) Plain Half Differential Case Differential Side Gear Bearing Cone If ring gear was removed from the differential case, reinstall it at this time. Clean the differential case and ring gear mounting surface. Position the differential case on a work bench with the machine surface down. Place the ring gear on the case with the teeth facing up. Install bolts into the tooth side of the ring gear and install the flat washer and nut onto the differential case side. When all bolts have been installed, tighten opposite one another until one half the prescribed torque is obtained Lb-Ft ( N-m) Repeat the process to full torque specifications Lb-Ft ( N-m) Press bearing cones onto differential case halves. Place bearing cups on cones during remainder of assembly to prevent damage of bearings. Apply a small amount of hypoid axle lubricant to all mating surfaces. This will aid in assembly by keeping parts together and providing initial lubrication. Place gear thrust washer and differential side gear in differential case flange half. Assemble pinion mates and pinion mate thrust washers onto differential cross shaft. Place assembly into flange half differential case. Place remaining differential side gear and thrust washer in position on differential pinion mates. Assemble case halves, making sure match marks are lined up. Install differential case bolts. Tighten alternately and torque evenly to Lb-Ft (244-27N-m). 19
22 OUTPUT SHAFT ASSEMBLY Flanged Hex Nut (900-1,200 Lb-Ft) (1,220-1,627 N-m) End Yoke Beveled Retaining Ring Output Oil Seal Output Shaft Bearing Output Shaft Housing Press new bearing onto shaft using output shaft bearing installer service tool. Install output shaft and bearing assembly into housing using bearing installer service tool withadequate 2 jaw puller. Seat bearing completely in housing and remove excess Loctite. Install beveled retaining ring in housing with bevel facing to the rear of the axle. Be certain the retainer ring is fully seated. Clean and dry threads on output shaft. Lubricate bearing with hypoid axle lube. Install oil seal using proper service tools. igure 19 Apply a thin layer of Loctite #620 to the outside diameter of the bearing before assembly into housing. Install end yoke using yoke installer service tool. Apply Loctite #680 to threads before installing new flanged hex nut. Use torque multiplier and torque flanged hex nut to 900-1,200 Lb-Ft (1,220-1,627 N-m). igure 20 20
23 INTER-AXLE DIFFERENTIAL ASSEMBLY Position inter-axle differential case on two 4" x 4" blocks for reassembly Install new rear differential bearing cup into case. Press new bearing cone onto rear differential gear. Tap nut lightly with soft hammer. Position dial indicator onto end of input shaft.. Apply a light coating of gear lube to rear diff-gear bearing, hub surface, and interior bore, then install. Lubricate and place inter-axle differential assembly inside of plastic lube retainer and install into case. Align the bolt holes of the plastic lube retainer with the case and install the two bolts and washers. Tighten and torque lube retainer bolts to Lb-Ft (27-34 N-m). Press new needle bearing into I.D. of drive gear. Lubricate needle bearing and carefully lower drive gear into intermediate case until differential gear is seated in inter-axle differential. Press input shaft front bearing cone onto shaft until seated completely against shoulder. Lube the needle thrust bearing lightly and place on front drive gear. Ensure that thin bearing race is seated against drive gear and the thrust bearing is seated between the two spacers. Lube and install input shaft, turning slightly to engage splines. Install new input shaft front bearing cup into input shaft bearing retainer without shims. Install bearing retainer onto intermediate housing and bolt into place. Using suitable pry bar and spacer, pry input shaft out and record end play. Proper end play for inter-axle is.001 to.003 inch (.025 to.076 mm). Subtract.003 inch (.076 mm) from recorded end play and assemble combination of shims that total proper thickness to establish correct end play. Measurement with dial indicator..080in. (2.032 mm) Preferred end play..003in. (0.076 mm) Required shims. igure in. (1.956 mm) Remove input shaft bearing retainer and install shim pack between bearing retainer and input shaft bearing cup. Remove input shaft. Install shift spring into the bottom of the shift well. Check shift fork for excessive wear. Replace if necessary. Check clutch collar for wear or damage in groove, on drive lugs, and splines. Replace if necessary. Apply a thin coat of grease on the clutch collar riding surface area of shift fork. Thread input flanged hex nut onto input shaft until resistance is felt from locking compound. 21
24 INTER-AXLE DIFFERENTIAL ASSEMBLY Assemble the shift collar onto the shift fork with flat side of collar up. The fork bushing must also face up. Install the fork and collar into the case and align the hole of the shift fork over the opening of the spring. Apply a thin coat of grease to the small diameter of the shift shaft. Insert shift shaft into cylinder and install through the shift fork hole and the spring. Make sure shaft is seated into the bottom of the shift cylinder. Apply a thin coat of grease to the O-ring of the shift piston. Lubricate and place piston/o-ring assembly into shift cylinder with detailed side facing front for the composite piston and the flat face on the aluminum piston. Seat piston firmly against shift shaft. Install onto the shift cover. Install new oil seal into input shaft bearing retainer. Clean the mating surfaces of the bearing retainer and the case. Apply a 1/16 in. bead of Loctite #518 Gasket Eliminator to cover mounting surface of case and around each bolt hole.. Install bearing retainer and tighten bolts alternately. Torque bolts Lb-Ft ( N-m). Inspect input yoke seal surface for grooves. If grooves can be detected with fingernail, it must be repaired with a CR SPEEDI-SLEEVE or replaced. Clean and dry threads on input shaft. Install end yoke using installer service tool. Apply Loctite #680 (green) to threads. Use torque multiplier and torque input flanged hex nut to 900-1,200 Lb-Ft (1,220-1,627 N-m). Clean the shift cover sealing area and the intermediate case and apply a 1/16 in. bead of Loctite #518 Gasket Eliminator. Install shift cover. Install four washers and cover bolts. Tighten and torque bolts alternately to Lb-Ft (20-27 N- m) until cover is seated properly. Lube bearing and bearing journals then Install the input shaft into the shift collar and lube input shaft bearing. igure 22 22
25 DIFFERENTIAL INSTALLATION Install ring gear and differential assembly into carrier housing. Tilt differential slightly so ring gear clears pinion pilot bearing support. Differential bearings should be lubricated and bearing cups should be cleaned and #620 loctite applied to the O.D. of the bearings. Be sure side bearing cups are seated on bearing cones. Assemble differential bearing caps with match marks in proper location. Clean bearing cap bolts and washers and coat threads with Loctite #277(red). Loosen adjusting ring on tooth side of ring gear 1 notch and tighten adjusting ring on flange side of ring gear 1 notch. Repeat process until backlash is elminated. Tighten adjusting ring on tooth side of ring gear until the ring gear and pinion backlash matches the backlash etched on the ring gear. This adjustment sets both the backlash and the bearing preload. Check ring gear and pinion backlash in four equally spaced positions aound the ring gear with a dial indicator as shown. Install bearing cap bolts and tighten enough to eliminate visible space between differential bearing cap and carrier. Install adjusting rings. Tighten both adjusting rings until end play is eliminated, and there is backlash between the ring gear and pinion. igure 24 Once the backlash is set, torque the differential bearing cap bolts to Lb-Ft ( N- m). Check backlash after torquing cap bolts. igure 23 23
26 RING GEAR AND PINION TOOTH CONTACT PATTERN The procedures to the right are to be used to establish proper gear tooth pattern after assembly of the carrier is complete. The GLEASON gear set is identified by a 390GA series part number. The ORLIKON is identified by a 390GA series part number. STEP 1. Paint 1/4 ring gear with marking compound on both the drive and coast side. STEP 2. Rotate ring gear at least one complete revolution in both directions while load is being applied. HEEL DRIVE SIDE (CONVEX) ROOT TOE PROFILE COAST SIDE (CONCAVE) TOP LAND CORRECT GEAR PATTERNS FOR GLEASON CUT GEARS CORRECT GEAR PATTERNS FOR ORLIKON CUT GEARS 24
27 INSTALLATION OF INTER-AXLE DIFFERNETIAL TO CARRIER Thoroughly clean mating face of carrier and apply an 1/8 inch bead of Loctite #518 Gasket Eliminator. See e 19 for correct bead pattern. Align inter-axle differential case with carrier housing and insert bolts and torque to Lb-Ft ( N-m). #518 Gasket Eliminator Bead Pattern igure 19 YOKE REMOVAL AND SEAL REPLACEMENT Disconnect drive shaft at the rear U-joint. Remove yoke nut. Remove end yoke using the yoke remover tool. Remove oil seal. Inspect end yoke seal surface for grooves. If grooves can be detected with fingernail, it should be repaired with a CR SPEEDI-SLEEVE or replaced. Clean and dry threads on input/ouput shaft or pinion. Install oil seal using proper tools. igure e 25 Install end yoke using yoke installer.. Apply Loctite #680 (green) to threads. Use torque multiplier and torque flanged hex nut to 900-1,200 Lb-Ft (1,220-1,627 N-m). 25
28 SHIFT CYLINDER SERVICE DISASSEMBLY Disconnect air line from power divider. Remove shift cylinder cover bolts and washers. Remove cover and O-ring seal. Pull shift cylinder piston assembly from carrier. Inspect all components for wear. Piston Assembly Seal, "O"-ring Shift Cover Washer Shift Cover Bolt (15-20 Lb-Ft) (20-27 N-m) ASSEMBLY Inspect all new components. Lubricate and place piston/o-ring assembly into shift cylinder with detailed side facing front for the composite piston and the flat face on the aluminum piston. Seat piston firmly against shift shaft. igure 28 Clean the shift cover sealing area and the intermediate case and apply a 1/16 in. bead of Loctite #518 Gasket Eliminator. Install shift cover and tighten bolts to precribed torque Lb-Ft(20-27N-m) igure 27 Install washers and cover bolts. Tighten bolts alternately to Lb-Ft (20-27 N-m) until shift cover is seated properly. 26 Connect air line to power divider.
29 INSTALLATION OF DIFFERENTIAL CARRIER INTO AXLE HOUSING Thoroughly clean the inside of the carrier housing and inspect the housing mounting surface for nicks and general cleanliness. Stone the surface if necessary to remove burrs or nicks. Install the new axle flange gasket. Install the axle shafts in proper location. Torque the axle flange nuts to vehicle manufacturers specifications. Clean drain plug and fill unit to proper level with hypoid gear lubricant. Apply Loctite #565, or its equivalent, to drain plug threads. Insert and torque to 35-45Lb-Ft (47-61N-m). igure 29 Apply an 1/8 inch bead of Loctite #518 Gasket Eliminator onto the axle housing mounting flange and around each bolt hole. Thread 2 studs or guide pins into the axle housing apart. This will eliminate rotation of the carrier assembly after it makes contact with the gasket material NOTE : Lubricant close enough to bottom of fill hole to be seen or touched is not sufficient. Lubricant must be level with the fill hole. Forward Rear Rear Rear * Lube capacity is based on a 4 0 installation angle ** Lube capacity is based on a 11 0 installation angle Install the carrier assembly into the axle housing. Clean the mounting bolts and coat with Loctite #277 (red), or its equivalent, and install Tighten bolts evenly in cross pattern. Torque bolts Lb-Ft ( N-m). Allow one hour cure time for gasket material before adding hypoid gear lubricant. Remove the old axle flange gasket and clean mating surfaces of the hub and axle flange. 27
30 AXLE / TORQUE SPECIFICATIONS S400-S Specifications Position U.S. Metric Pinion bearing preload is established prior to installation of pinion seal. Capacity will vary depending on the housing angle in each vehicle. Fill to lower edge of fill hole in rear of axle housing as shown on Page 27. Forward Rear Fasteners Position Thread size Grade Lb-Ft N-m Rear Rear Fasteners Position Thread size Grade Lb-Ft N-m NOTE: Refer to vehicle manufactures specifications for Axle Flange - Wheel Nut fastener torque requirements. 28
31 RECOMMENDED SERVICE TOOLS ORDER NUMBER ILLUSTRATION DESCRIPTION 29
32 RECOMMENDED SERVICE TOOLS DST1 T1000 S400 SERVICE KIT ORDER NUMBER ILLUSTRATION DESCRIPTION (To be used with seal installers listed below) (To be used with 2-jaw puller) (To be used with yoke installer DST 1007) 30 Service Tools 655 Eisenhower Drive Owatonna, MN Telephone: Fax Number:
34 Copyright Eaton and Dana Corporation, EATON AND DANA CORPORA TION hereby grants its customer s, vendor s, or distributor s permission to freely copy, reproduce and/or distribute this document in printed format. It may be copied only in its entirety without any changes or modifications. THIS INFORMATION IS NOT INTENDED FOR SALE OR RESALE, AND THIS NOTICE MUST REMAIN ON ALL COPIES. For spec ing or service assistance, call HELP (4357) 24 hours a day, 7 days a week (Mexico: ), for mo re time on the road. O r visit our web sit e at ang er.com. Roadranger: Eaton, Dana and other trusted partner s providing the best products and services in the industry, ensuring more time on the road Dana Corporation All rights reserved. Pr inted in US A Dana Corporation Commercial Vehicle Systems P. O. Bo x 4097 Kalamaz oo, MI U.S.A.
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Driver Instructions Video Instruction Available Instructional videos are available for download at no charge at Roadranger.com Videos are also available for purchase. To order, call 1-888-386-4636. Ask