Ural (Урал( Урал) - Dnepr (Днепр( Днепр) Russian Motorcycle Part 3B: Full-Time Two-Wheel Drive (2WD) with non-locking Differential (MT-2 / MT-6 / MB-650M / MB-650M / Ural Sportsman ) (See Also Part 3A: Locking versus non-locking Differential, Part 3C: Full-Time 2WD with Locking Differential and Part 3D: Full-Time WD with Locking non-differential) Ernie Franke eafranke@tampabay.rr.com / 203
Four Types of Final Drives in Russian Sidecars. Full-Time, Straight Final Drive (WD) (Part 2) One-Wheel Drive (WD) Available in Various Ural / Dnepr Models 2. Full-Time, Two-Wheel Drive (2WD) with non-locking Differential (Part 3B) Dnepr MB-650M (985-99) Dnepr MT-2 (977-985) Dnepr MT-6 (985-2005) Dnepr Rear Drive Casings Allow for Adding Locking Differential First Available in Ural: Sportsman IMZ 8.07 (995-998) Only True Differential for Ural Pre- Patrol Model 3. Full-Time, Two-Wheel Drive (2WD) with Locking (Engageable) Differential (Part 3C) Dnepr MB-750 (964-973) Dnepr MB-650 (968-984) Dnepr MB-750M (973-977) 4. Full-Time, WD with Engageable Locking 2WD (non-diff) (Part 3D) Available in Various Ural Models Production: Patrol (998-Current), Gear-Up (200-Current) and Patrol-T (2009-Current) Limited Editions with Engageable Sidecar Drive Shaft: Derivatives of Patrol or Gear-Up Basic (2005), Raven (Vorona) (2006), Pustinja (2007), Wjuga (2008), Sahara (2009) and Taiga (200) The order of presentation will be chronologically from Dnepr s MB-650M, MT-2, MT-6 and Ural s Sportsman.
Ural (Урал( Урал) ) / Dnepr (Днепр( Днепр) 2WD with Non-Locking Diff s Ural (Урал( Урал) ) Model M-72 Production 94-950 Engine 750cc SV Voltage 6-Volt Drive Train Full-Time, Straight Final Drive (WD) Rear Suspension Plunger M-72K 952-958 750cc SV 6-Volt Full-Time, Straight Final Drive (WD) Plunger M-72M 956-96 750cc SV 6-Volt Full-Time, Straight Final Drive (WD) Plunger M-6 958-96 650cc OHV 6-Volt Full-Time, Straight Final Drive (WD) Plunger M-62 (Ural-) 96-965 650cc OHV 6-Volt Full-Time, Straight Final Drive (WD) Plunger M-63 (Ural-2) 965-97 650cc OHV 6-Volt Full-Time, Straight Final Drive (WD) M-66 (Ural-3) 97-973 650cc OHV 6-Volt Full-Time, Straight Final Drive (WD) M-67 (IMZ-8.0) 974-976 650cc OHV 2-Volt Full-Time, Straight Final Drive (WD) M-67.36 976-984 650cc OHV 2-Volt Full-Time, Straight Final Drive (WD) Sportsman IMZ 8.07 995-998 650cc OHV 2-Volt Full-Time 2WD with Non-Locking Differential 8.03 Series 650 984-2002 650cc OHV 2-Volt Full-Time WD with Engageable 2WD (No Diff) 750 Series 2003-Present 750cc OHV 2-Volt Full-Time WD with Engageable 2WD (No Diff) Dnepr (Днепр)( Model M-72 Production 95-956 Engine 750cc SV Voltage 6-Volt Drive Chain Full-Time, Straight Final Drive (WD) Rear Suspension Plunger M-72N (H) 956-960 750cc SV 6-Volt Full-Time, Straight Final Drive (WD) Plunger K-750 959-963 750cc SV 6-Volt Full-Time, Straight Final Drive (WD) K-750M 963-977 750cc SV 6-Volt Full-Time, Straight Final Drive (WD) MT-2 (Dnepr-2) 974-982 750cc SV 6-Volt Full-Time 2WD with Non-Locking Differential * * MB-750 964-973 750cc SV 6-Volt Full-Time 2WD with Locking (Engageable) Diff * MB-750M 973-977 750cc SV 6-Volt Full-Time 2WD with Locking (Engageable) Diff * K-650/MT-8 967-97 650cc OHV 6-Volt Full-Time, Straight Final Drive (WD) K-650/MT-9 97-976 650cc OHV 6-Volt Full-Time, Straight Final Drive (WD) MB-650 968-984 650cc OHV 2-Volt Full-Time 2WD with Locking Differential * MB-650M 985-99 650cc OHV 2-Volt Full-Time 2WD with Non-Locking Differential * * MT-0 973-976 650cc OHV 2-Volt Full-Time, Straight Final Drive (WD) MT-0.36 976-984 650cc OHV 2-Volt Full-Time, Straight Final Drive (WD) MT- (Dnepr-) 984-2005 650cc OHV 2-Volt Full-Time, Straight Final Drive (WD) MT-6 (Dnepr-6) 985-2005 650cc OHV 2-Volt Full-Time 2WD with Non-Locking Differential * * * Locking Feature Deleted after Two Years of Production, * * Optional Kit Available to Add Locking Differential
Russian Two-Wheel Drive (2WD) Time-Line Dnepr MB-650 Swing-Arm Frame Introduced M-73 (Modified M-72) M with an with K-750K Engagable Sidecar Drive and Brake, Locking Differential Added on but No Production) M-72 Minor Redesigned MB-750 Introduced MB-750, MB-750M and MB-650 and Issued as M-72NM with Differential Drive Mother of All Dnepr Dnepr Russian Sidecars: M-72M MB-750 MB-750M 940 945 950 955 960 965 970 975 Taiga Sahara Dnepr MB-650 Dnepr MB-750M Dnepr MB-650M Locking Differential Dnepr Upgrade Kit Available Dnepr MT-2 MT-6 Ural Sportsman (True Differential) Wjuga Ural Patrol Pustinja (non-diff 2WD) Raven Basic Ural Gear-Up (non-diff 2WD) Ural Limited Editions (non-diff 2WD) Ural Patrol-T (non-diff 2WD) 975 980 985 990 995 2000 2005 200 KMZ s (Dnepr factory) first production 2WD was the MB-750 (964), with a rear drive modeled on the WW-II BMW s R75. The first production Ural 2WD post-war was the short-lived Sportsman in the mid-990's, to be followed by the non-diff Patrol and Gear-Up.
Dnepr MB-650M (973, eng.auto24.ee) The absence of the control lever indicates that it is a non-locking differential. The differential gear of the MB-650M is non-locking.
MT-2, MT-6, MB-650M, MB-650M Differential Drive (2WD). Differential Cover 2. Wedge Bolt 3. Differential Casing 4. Locking Ring 5. Nut 6. Rear Drive Casing 7. Driving Gear Assembly with Bearings 8. Left-Hand Hub 9. Driven Bevel Gear 0. Satellite Gear. Satellite Axle (Shaft) 2. Distance Bushing 3. Idle Gear 4. Right-Hand Hub 5. Differential Cup 6. Ball Bearing 7. Needle Bearing 8. Output Gear 9. Small Gear 20. Locking Ring 2. Elastic Coupler (Doughnut) 22. Cardan Shaft 23. Differential Cowl (Cap) 24. Ball Bearing 25. Radial Thrust Bearing The differential gear of the MT-2, MT-6, MB-650M, MB-650M is non-locking, with an asymmetric coefficient of 9:.
MT-2, MT-6, MB-650M, MB-650M Differential Drive (2WD) Rear Drive and Differential Gear Mounted in Common Split-Housing Composed of Three Parts Differential Cover () Differential Casing (3) Rear Drive Casing (6) Rear Drive Consists of Spiral Bevel Gear (7 and 9) Differential Casing Consists of Four Parts: Two Hubs (8 and 4) 8. Left-Hand Hub 0. Right-Hand Hub Left-Hand Hub (8) Mounted in Rear Drive Casing on Two Needle Bearings Right-Hand Hub (4) Mounted in the Differential Half Two Satellite Gears (0) Two Idle Gears (3) Differential Half (5) Satellite and Idle Gears Installed on Axle (), whose Tenons on one Side Enter Differential Cup (5), and on Other Side, Large Bevel Gear (9) Differential Cup and Driven Gear Are Centered by Means of Two Roller and Tightened Together by Two Bolts, Secured by a Special Lock Washer Assembled Differential Supported by Two Bearings: Ball Bearing (6) Mounted in Differential Casing Roller (Compound) Bearing Mounted in Rear Drive Casing Force from the Differential Transmitted to Sidecar Wheel thru Pair of Gears (8 and 9) Output Gear (8) Mounted on Splines of Hub (4) and Fixed with Lock Ring (20) Nut (5) Has Left-Hand Thread at Both Ends Oil Poured into Main Casing thru Fill Hole, and into Differential Gear thru Side Port in Cover To Lubricate Universal Joint, Remove Rubber Seal and Unscrew Protective Cap Reduction Gear Cowl Has Right-Hand Thread
MT-2, MT-6, MB-650M, MB-650M Sidecar Wheel Speed Reducer (2WD). Cardan Shaft Assembly 2. Nut with Seal 3. Left-Hand Cover 4. Gasket 5. Suspension Lever (Pendulum) 6. Right-Hand Cover 7. Collar Seal (Cup Packing) 8. Gland (Seal) Cover 9. Sidecar Wheel Axle 0. Ball Bearing. Driven Gear 2. Sleeve 3. Ball Bearing 4. Ball Bearing 5. Ball Bearing 6. Small (Pinion) Gear 7. Speed Reducer Cap (Cowl) Sidecar Drive Gear MT-6, MB-650 The sidecar speed reducer remains the same for locking (MB-750M, MB-650M) and non-locking differentials (MB-750, MB-650, MT-2 and MT-6).
MT-2, MT-6, MB-650M, MB-650M Sidecar Wheel Speed Reducer (2WD) Force from Differential Gear Transmitted via Transverse Torsion Cardan Shaft to Reduction Pinion Gear (6), which Is Meshed with Driven Gear () Transverse Cardan Shaft Designed to Cushion Impact Loading in Power Transmission to Sidecar Wheel Drive Pinion Gear (6) Interchangeable with Differential Gear (9) from Main Drive Driven Gear () Mounted on Two Ball Bearings (0 and 3) Covers (3 and 6) Bolted to Casing Gaskets (4), Collar Gland (7) and Two Rubber Glands Press-Fitted in Nut (2) Provide Air-Tightness for Reduction Gear Oil Is Poured into Reduction Gear Casing thru Filling Hole When Mounting the Reduction Gear, Ensure Proper Position of Joint Forks Forks Press-Fitted on Cardan Shaft Splines Must Be Arranged in Same Plane To Lubricate Universal Joint, Remove Rubber Seal and Unscrew Protective Cap Differential Cowl Has Left-Hand Thread The sidecar wheel speed reducer has a gear ratio of 2.4: between the transverse drive shaft and the sidecar wheel.
Dnepr MT-2 (affordable-beemers.smugmug.com) beemers.smugmug.com) Oil Fill Plug Grease Filler Port Oil Drain Hole Grease Filler Port Notice Area of MT-2 Rear Drive Reserved for Differential Lock Engagement Lever Grease Filler Port Oil Fill Plug Transverse Axle to Driven Sidecar Wheel
MT-2 Rear Drive: Before and After (www.wilku.szczecin.pl) Oil Filler Port Oil Filler Port Oil Filler Port Notice Area of MT-2 Rear Drive Reserved for Differential Lock Engagement Lever
MT-2 Rear Drive: Before and After (www.wilku.szczecin.pl) Grease Filler Port Sidecar Gear Reducer Notice Area of MT-2 Rear Drive Reserved for Differential Lock Engagement Lever Rear Drive Rear Drive
MT-2 Sidecar Gear Reducer: Before and After (www.wilku.szczecin.pl) Pendulum Swing-Arm Sidecar Gear Reducer Wheel Axle
Dnepr MT-6 (sovietsteeds.com) 985 MT-6 Notice the Place on the Casing for the Locking Mechanism! 985 MT-6 Grease Filler Port MT-6 (mercador.ro)
Inside the MT-6 Rear Drive (moto.kiev.ua) Grease Filler Port Notice Area of MT-6 Rear Drive Reserved for Differential Lock Engagement Lever The next few slides open up the MT-6 differential.
MT-6 in the Raw (http://oppozit.ru/post_73445.html)
MT-6 Rear Drive and Sidecar Wheel Gear Reducer (Ken Ulrich U-2 U 2 Cycles) Swing-Arm Suspension non-locking Diff, Transverse Axle and Sidecar Wheel Reducer Sidecar Pendulum Gear Reducer and Sidecar Wheel Brake Sidecar Pendulum Gear Reducer Non-Locking Differential and Cardan Swing-Arm Suspension Cardan Propshaft from Gear-Box Grease Filler Port Notice Area of MT-6 Rear Drive Reserved for Differential Lock Engagement Lever Transverse Axle to Sidecar Gear Reducer
MT-6 Rear Gear Drive Housing Drive Outer Cover Gasket Rear Drive Case Gasket for Differential Cover Dipstick ВП7504820 Drive Hub Needle Bearing Inner Race Oil Plug + Washer Oil Plug + Washer Rear Drive Housing Bushing for Brake Lever Seal Collar with Seal
MT-6 Propeller (Cardan) Shaft 7205304-Б Cover for Universal Joint 7205306 75005307-A Flexible Flange Part # 720503 Description Coupling Assy Qty MT905300 Cardan Shaft Assy MT90530 Cardan Shaft 75005304-Б Cowl 75005305 Circlip 2 75005306 Sealing Ring 65005307 Disk 7205309 Fork 7500530 Hinge 72053 Spider 720532 Seal 4 720533 Yoke 4 7500534 Fork 720537 Ring 4 7205323 Wedge Bolt 7205324-Б Coupling 7205324-Б Elastic Absorber 7205326-Б 7205328-A, Б 7205329 Bushing Yoke (Band) Ring 250867 Nut M8X Wire Circlip 7205329 252005 25803 264072 Washer 8 Cotter Pin 2X6 Lube Fitting M6X 904700 Needle Bearing 4 7500530 Universal joint MT90530 Cardan Shaft
MT-6 Differential Drive, Crownwheel Set (bcozz.multiply.com) Transverse Axle Joint Fork Differential Half Right-Hand Hub) ВП48005 Satellite Gear, 8 teeth Left-Hand Hub ВП483
MT-6 Rear Drive Reduction Gear Pinion Double-Row Bearing 72052-2/ 2/ 3086304L Final Drive Gear and Pinion Final Drive Nut 75005223 O-ring for Final Drive Nut 75005224 Pinion Gear Needle Bearing 87490 Bearing 207 7205229 Final Drive Hub Double Washer for Crown Wheel Bolts 7205248 Rear Drive Bushing 7205246-A
Differential w/ Pinion and Driven Gear MB750M480 + 7205202 + ВП482 MT-6 Differential Drive Satellite Housing with Ring and Pinion (MB-750, MB-650, MT-6) Part # 720209 720232 720454 КМЗ-8.520455 7205202 75005223 75005224 720538 720538-0 0 720538-02 02 7205334 75006352-A ВП4800-A ВП48004 ВП48005 ВП4802 ВП4804 ВП4805 MB750480 ВП48 ВП482 Description Roller Lock Washer Gland Spring Gland Spring Gear Bearing Nut Ring Washer Washer Washer Gland Cup Gland Cup Output Gear Circlip RH Hub Bolt Satellite Gear Idle Gear Driven Gear Distance Bushing Differential Half Qty 2 2 2 2 2 2 2 ВП4822 ВП483 ВП48806 ВП48808 ВП4882 ВП4884 0 3086304Л 87490 700005 3 X 5.8 ДV6.5 X 6.5 Bushing LH Hub Satellite Axle Washer Washer Washer Ball Bearing Ball Bearing Needle Bearing Ball Bearing Roller Roller 90 29 Right-Hand Hub) ВП48005 The presence of satellite gears and stray gears in the rear drive casing indicates that the rear drive is indeed a differential. Left-Hand Hub ВП483
MT-6 Differential Drive (bcozz.multiply.com) Output Gear ВП4800 4800-A Right-Hand Hub) ВП48005 Differential Half BП482 Left-Hand Hub ВП483
MT-6 (http://moto.kiev.ua/trid/soldadd/27045883698) ВП4800 4800-A A Output Gear ВП4800 4800-A A Output Gear Satellite Gear ВП483 Hub Idle Gear MB750480 Driven Crown Bevel Gear The inner workings of the MT-6 differential show the idle and satellite gears, the output gear, the crown gear and the hub.
MT-6 Sidecar Wheel Gear Reducer (bcozz.multiply.com) Drive Shaft to Powered Wheel Wheel Axle Washer ВП50002 Sidecar Drive Axle ВП5032 Cardan Joint Fork 65048320 Cardan Joint Fork 7205309 Axle Bushing ВП5000 Reduction Gear ВП502 Sidecar Driven Gear ВП503 Part # 720454 KMZ-8.520455 75005224 7205309 72053 720532 720533 720537 720538 720538-0 0 720538-02 02 7205323 7205334 75006352-A 75006400 MB65048320 ВП5000 ВП50002 ВП502 ВП5023 MB65050304 MB65050305 MB65050306 MB65050307 ВП503 ВП5032 ВП50320 50320-A MB7505058 36720 250867 252005 25804 258055 264072 0 204 206 3086304Л 904700 Description Gland Ring Gland Ring Ring Universal Joint Yoke Universal Joint Center Cross Universal Joint Ring Ring Casing Lock Ring Adjusting Washer Adjusting Washer Adjusting Washer Wedge Bolt Gland Cup Gland Cup Deflector Universal Joint Yoke Bushing Special Washer Small Gear Reduction Gear Nut Cardan Shaft Pin Seal Seal Driven Gear Sidecar Axle Universal Joint Bowl Distance Bushing Nut Nut Washer Cotter Pin Cotter Pin Lubrication Fitting Ball Bearing Ball Bearing Ball Bearing Ball Bearing Roller Bearing Qty 2 2 4 4 4 2 2 2
MT-6 Reduction Gear Case with Covers (2WD) Paper Gasket ВП50003 5309344-A Rubber Bush Lower Shock-Absorber Bolt 72034-A Oil Plug + Washer Seal Spring 720526
Final Drive, Full-Time 2WD with non-locking Differential Differential Drive Differential Drive (DNEPR MT-6, MB-750, MB-650) (MB-750) Vendor ID: 6087934753 Vendor ID: 3305686056 List Price: $670.00 List Price: $399.00 (www.ebay.com) (www.ebay.com) Differential Drive, No Blocking (MT-6) Differential Drive (MT-6, MB-750, MB-650) Vendor ID: 05-d (www.dnepr-kiev.com)
MT-6: Full-Time 2WD with non-locking Differential (www.autosvit.com.ua) Rear Drive Sidecar Wheel Gear Reducer Notice the Area of MT-6 Rear Drive Reserved for Differential Lock Engagement Lever Dismantled MT-6 Rear Drive
MT-6 Differential Grease Filler Port Notice the Area of MT-6 Rear Drive Reserved for Differential Lock Engagement Lever
MT-6 Suspension (oppozit.ru) Tighten the nuts which fasten the final drive to the swingarm. Failure to tighten the nuts in due time results in loose joints and destruction of the final drive cover. Swing-Arm Suspension (Pendulum) of Sidecar Gear Reducer Swing-Arm Suspension of Rear Drive
Ural Sportsman 998, IMZ 8.07
Ural Sportsman: True Differential (Diff) Ural Sportsman: True Differential (Diff) First Two-Wheel Drive (2WD) Model Offered in the USA Production: 995-998 Differential in the Rear and Full-Time Two-Wheel Drive (2WD) Both Bike and Sidecar Wheels Were Powered Advantage: Excellent Sidecar Handling Disadvantages: Differential If One Wheel Lost Traction, the Bike Would Spin Flew the Chair: Wheel in the Air Would Spin Wildly and Lose Power to Main Wheel and Come Back to Earth If Power to the Wheels Was Great Enough, Damage to Drive Could Result If Sidecar Is Removed, the Differential Will Spin the Sidecar Shaft and No Power Goes to Rear Bike Wheel Sportsman Replaced with Patrol and Gear-Up Models Single Wheel Drive Bike, with Lever to Engage Sidecar Drive No Mechanical Differential (More Robust and Maintenance-Free) NO differential, so the 2 wheel drive mode is strictly for off road or slippery conditions Used When You Get Stuck or Drive in Mud or Sand»Can't Drive All the Time with It Engaged» Rig Wants to Go Straight In wheel drive it handles like the other leading link Urals, in 2 wheel drive it becomes more difficult to steer as the bike tends to continue straight. can safely fly the chair in a Patrol. yep fulltime two-wheel drive...they don't make them like that anymore for the US market due to a change in the law apparently. The newer models of the Gear-Up and Patrol I believe have the manual two wheel drive for
Ural "Sportsman" with Full-Time 2WD Rear Drum Brake Activator Transverse Drive Shaft to Sidecar Gear Reducer The Ural "Sportsman" was available with full-time two-wheel drive (2WD) with differential, produced between 995 and 998. The Sportsman was replaced with the Patrol with engageable 2WD, but without a differential.
Ural Sportsman: Driven Sidecar Wheel (2000 650cc Manual) Ural IMZ-8.07 Sportsman Has a Driven Sidecar Wheel Driven via Shaft Connected to Rear Drive thru Universal Joints Rear Drive Uses an Asymmetrical Differential that Supplies Approximately 70% of Torque to Motorcycle Rear Wheel and 30% of Torque to Sidecar Wheel. Gear Case.Star Gear 2. Retainer 3. Roller 2. Differential Body 2. Rear Drive Case Cover 22. Driving gear 32. Needle roller 3. Idle Gear 3. Rear Wheel Axle 23. Seal 33. Spacer 4. Bearing Nut 4. Axle Nut 24. Bolt 34. Spacer 5. Hub 5. Splint 25. Propeller Shaft Fork 35. Satellite Gear 6. Propeller Shaft 6. Ring 26. Seal Rings 36. Satellite Pin 7. Case Seal 7. Spacer 27. Driving Gear 37. Driven Gear (Crown) 8. Needle Bearing 8. Nut 28. Bronze Spacer 38. Screw 9. Double-Row Bearing 9. Double-Row Bearing 29. Spacer 39. Ring 0. Seal Cap 20. Sun gear Seal 30. Gasket 40. Bolt
Ural Sportsman Differential (sovietsteeds.com) Ural Differential Has a Torque Splitter Based on a set of 4 Planetary Gears Connecting a Small Central Gear to the Sidecar Axle, with a Large Internal Ring Gear, to the Bike s Pusher (Main Wheel) Provides about a 70%/30% Power Split between the Main Wheel, with It's Normally Heavier Loading, and the Sidecar Wheel with Less Loading Picture Shows the 4 Planetary Gears that Are Rotated by the Bevel Drive Ring Gear Planetary Gears in turn Drive the Small Inner Gear, which is Connected to the Sidecar Driveshaft Not shown is a Cup-Shaped, Large Internal Ring Gear that Drops over the outside of the 4 Planetary Gears and Provides Drive to the Main Wheel Planetary Gears Only Turn when the Differential Is Providing Independent Wheel Rotation Speeds Bevel Drive Ring Gear Inner Gear Connected to Sidecar Wheel 4 Planetary Gears
Sidecar Bearing Unit (Sportsman) (2000 650cc Manual) Ural Sportsman Different from Previous WD Tourist Motorcycle (IMZ-8.03-40A) Changes to Following Units Rear Drive Rear Wheel Swing-Arm Sidecar Swing-Arm and Hub Addition of Sidecar Drive Shaft and Universal Joints Sidecar Chassis and Fender Sidecar Brake Tie Rod 3. Propeller Shaft 4. Universal Joint. Swing-Arm 2. Brake Drum Cover 3. Slotted Hub 4. Sidecar Axle 5. Ball Bearing 6. Ball Bearing 7. Protective Ring 8. Spacer 9. Ring 0. Spacer Ring. Bolt 2. Shock Absorber Silent Block 3. Propeller Shaft 4. Universal Joint 2. Silent Block Rubber Bumper. Bolt 2. Brake Drum Cover 7. Protective Ring. Swing-Arm 6. Ball Bearing 8. Spacer 3. Slotted Hub 4. Sidecar Axle 0. Spacer Ring 5. Ball Bearing 9. Ring
МB-650 Non-Locking Differential (uraldnepr.ru) No Locking Lever The MB-650 (968-984) initially had a full-time, locking differential, but later continued production with a non-locking differential.
MB-650M Sidecar Frame (www. (www.redoctobermotorcycles.com) Transverse Drive Shaft Rear Suspension Sidecar Wheel Gear Reducer The bare sidecar frame shows the transverse drive shaft connected to the gear reducer, which drives the sidecar wheel.