X 3mm Flat Head Screw. Adjustment Hole x15x4mm Ball bearing. M2x10mm Hex Screw. Spring. Clutch Shoe. Ball.

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Annabella Harvey
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1 INSTRUCTIONS #35017 NITRO OB-4 1/10 SCALE 2-SPEED TRANSMISSION SET (Shoe Type) * This professional two speed transmission is only for Nitro OB-4 1/10 Scale OB4 Gas Car Kits. Nitro Ob4 ASSEMBLY OF THE TWO SPEED GEAR (45T GREEN and 41T PINK) * Apply Glue X 3mm X 3mm Glue T Spur Gear ( Green) Glue * Apply Glue. Adjustment Hole x15x Ball bearing st Gear Carrier (One-Way) T Spur Gear ( k ) nd Gear Clutch Bell ( ) * Assembly the 1st gear carrier as shown One-Way Bearing 28 ASSEMBLY OF THE TWO SPEED CLUTCH SHOE 234Z 4 X Set Clutch Shoe Carrier mm Hex Spring Clutch Shoe M3x3mm Set Ball * Use a 500 grit sand paper and flat surface to sand the shoe flat. Sand Paper Desk * the mm screw into the bottom and back off 5 turns. Ball #308F Clutch Shoe Carrier * Put the shoe carrier in the "D" cut Clutch Shoe Spring mm Hex * Notice the direction of the gear as shown. M3x3mm Set Leave 12mm 6 * 2 speed transmission after assembly.

2 25 ASSEMBLY OF THE MAIN SHAFT, LONG Alum Speed Brake Disc x1 x1 *Take the brake disc mount from K-15 parts tree. 26 ASSEMBLY OF THE MAIN SHAFT ONTO CHASSIS * Read this instruction with carefully ES-41 Alum.15T * Insert the 2x8.8 pin into shaft and keep the pin in the center of the pulley. 15T 5x8mm Bearing Bulkhead x1 * Insert the rear belt onto pulley before assembly. KS-05 Alum. Main shaft ballbearing block * For using shaft, please cut the shaded as shown. x4 Bearing Bulkhead T * Note the direction of the plastic washer.

3 29 ASSEMBLY OF THE MIDDLE SHAFT 1 2 mm *Take the pulley washer from K-15 plastic tree Alum T T 30 ASSEMBLY OF THE MIDDLE BELT * Insert the front Belt before assembly. x Front Belt M3X10 M3X Belt * Insert belt onto 17T pulley befor assembly.

4 39 ASSEMBLY OF THE RADIO TRAY ONTO CHASSIS Brake Lever Middle Support 3x3mm Set * Snap onto 37360ball & Socket Ball & Socket L Belt Tensioner Assembly ASSEMBLY OF THE BELT TENSIONER KIT Parts Number : M3x3 Set Belt Guide x8mm Ballbearing Flange Adapter Tension Rod Belt Tensioner M4x4 Set * This screw is use to adjust belt tension. 3 x8mm

5 ASSEMBLY OF THE 2 SPEED CLUTCH GEAR Clutch Bell CHECK THE GEAR BACKLASH OF THE CLUTCH GEAR AND SPUR GEAR Note Book Paper T 2nd Clutch gear T 1st Clutch Gear x 10 Ball bearing x 8mm 3 x 8 washer 3 x 5mm * Use note book paper to set gear backlash between spur and clutch bell gear. If the space is not correct the spur gear will be damaged. * Loosen or tighten your engine mount screw to adjust the mesh of the spur gear and clutch bell. WHEN USING THE NEW CLUTCH TYPE 2-SPEED TRANSMISSION, YOU WILL NOTICE THE SECOND GEAR SHIFT ACTION IS LESS AGGRESSIVE, LEAVING YOU WITH BETTER CONTROL. OFNA OFFERS A WIDE SELECTION OF GEAR RATIO CHOICES, USE THE BEST RATIO FOR YOUR TRACK LENGTH. REMEMBER DO NOT OVER REV YOUR ENGINE. ADJUSTING THE SHIFT POINT * Adjust the engine before adjusting the clutch shift timing. Adjust the engine as per engine instruction manual. Slight Air Gap 3x3 Set 1) Use a 1.5mm allen wrench to set the clutch shoe. 2) Adjust the 3x3 set screw to set the air gap distance between the clutch shoe and 2nd speed clutch bell. 3) Adjusting the mm screws, will change the shift timing of the clutch shoe. Adjust both screw the same amount of turns Counter-clockwise (Loosen) 2 SPEED GEAR RATIO COMBINATIONS IMPORTANT: The sum of the spur gear and clutch gear for1st gear must be equal the sum of the spur gear and clutch gear for 2nd gear be equal. Example: 1st gear 45+13=58 2nd gear 41+17=58 Must be equal ( STANDARD) CLUTCH GEAR SPUR GEAR (4 tooth difference) 45T/41T 13T/17T 14T/18T 15T/19T 44T/40T 43T/39T 42T/38T 41T/37T ( OPTION) SPUR GEAR CLUTCH GEAR (3 tooth difference) 45T/42T 13T/16T 14T/17T 15T/18T 44T/41T 43T/40T 42T/39T 41T/38T 16T/20T 16T/19T Torque Top Speed Torque Top Speed Short Track Long Track Short Track Long Track 1.5mm Allen Wrench Clockwise (Tighten) 1. Once the engine adjustments have been completed, proceed to the adjustment of the clutch shoe shift timing. (Using a 1.5mm allen wrench to adjust the clutch shoe.) Note: Clockwise Shift timing will become slower. Counter clockwise---shift timing will become quicker. 2. Adjust the clutch shift timing for your track conditions. As you tighten (Clockwise) the 2x10mm screw, the shift timing will become slower. As you loosen (Counter clockwise ) the 2x10mm screw, the shift timing will become quicker. 3. Set the shift timing to the track conditions while the car is running. 2 SPEED OPTION PARTS SPUR GEAR(1st): CLUTCH GEAR: T Spur Gear (olive) T Spur Gear (white) T Spur Gear (blue) T Spur Gear (red) T Spur Gear (pink) SPUR GEAR(2nd): T Spur Gear (gray) T Spur Gear (yellow) T Spur Gear (orange) T Spur Gear (green) 2 SPEED PARTS T (1st) T (1st) T (1st) T (1st) T (2nd) T (2nd) T (2nd) T (2nd) N0. Description N0. Description Ob4, long Clutch Shoe Carrier nd Gear Clutch Bell mm Hex st Gear Carrier Middle Shaft, Long Clutch Shoes One-Way Bearing Spring, Balance, Hex x15x Bearing

1:8 SCALE NITRO POWERED TOURING CAR

1:8 SCALE NITRO POWERED TOURING CAR RTR INSTRUCTION MANUAL *SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE. SAFETY PRECAUTIONS! This radio control models is not a toy! - First time builders should