Spur Gear And Center Differential Bearing

Special tools and workshop equipment required 

• Thrust Plate VW 401
• Thrust Plate VW 402
• Punch VW 408 A
• Thrust Disc VW 412
• Thrust Pad VW 447 H
• Thrust Pad VW 511
• Sleeve 40 - 103
• Thrust Piece 40 - 105
• Thrust pad 3005
• Press Support-R and Wheel Brg's.3144
• Tube 3296
• Assembly Tool 3301
• Guide Bearing Inst. Tool 3347
• Pressure Plate 3412
• Internal Puller Kukko 21/7
• Separating Tool Kukko 17/2
• Counter-Support Kukko 22/2
• Three-Arm Puller Kukko 45-2

Fig 1: Spur Gear And Center Differential Bearing

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1. Output Shaft
2. Transmission Cover
3. Outer Race/Tapered Roller Bearing
   • Replace TRANSMISSION COVER => List Item:Outer Race/Tapered Roller Bearing
4. Inner Race / Tapered Roller Bearing
   • Transmission cover side
   • Removing, refer to Fig 2
   • Installing, refer to Fig 3
5. Needle Bearing
   • For mounting the impeller wheel/drive gear on the output shaft
6. Output Wheel/Drive Wheel
7. Inner Race / Tapered Roller Bearing
   • Gear carrier side
   • Removing, refer to Fig 2
   • Installing, refer to Fig 4
8. Outer Race/Tapered Roller Bearing
   • Removing, refer to Fig 5
   • Installing, refer to Fig 6
9. Adjusting Shim
   • For bearing pre-load on the spur gear tapered roller bearing, refer to item 6 in Fig 1
   • To select the correct thickness, refer to DRIVE WHEEL/SPUR GEAR TAPERED ROLLER BEARING PRE-LOAD, DETERMINING 
10. Gear Carrier
11. Spacer Sleeve
12. Small Ball Bearing
    • For the center differential
    • Removing, refer to Fig 7
    • Installing, refer to Fig 8
13. Center Differential
    • Servicing only by the manufacturer
14. Large Ball Bearing
    • For the center differential
    • Removing, refer to Fig 9
    • Installing, refer to Fig 10

Fig 2: Removing Inner Race/Tapered Roller Bearing From Spur Gear

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A - Separating tool 22 to 115 mm, for example, Kukko 17/2

Fig 3: Installing Transmission-Cover Side Inner Race/Tapered Roller Bearing On Spur Gear

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Fig 4: Installing Gear-Carrier Side Inner Race/Tapered Roller Bearing On Spur Gear

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Fig 5: Removing Outer Race/Tapered Roller Bearing From Gear Carrier

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Fig 6: Installing Outer Race/Tapered Roller Bearing -A- In Gear Carrier

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Fig 7: Removing Small Ball Bearing -C- From Center Differential

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A - Counter-support, for example, Kukko 22/2

B - Internal puller 37 to 46 mm, for example, Kukko 21/6

Fig 8: Installing Small Ball Bearing -A- In Center Differential

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Fig 9: Removing Large Ball Bearing -B- From Center Differential

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-- Install the VW 447 H with the small diameter into the center differential.

-- Place the 40 - 105 on it.

A - Three-arm puller, for example, Kukko 45-2

Fig 10: Installing Large Ball Bearing -A- On Center Differential

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