SUBJECT: PROPER ASSEMBLY OF THE FAN DRIVE PUMP INCREASES
PERFORMANCE AND LENGTHENS SERVICE LIFE

PROBLEM:

The gear pump that drives the hydraulic oil cooler/radiator cooling fan can fail. The gear that is mounted on the end of the input shaft of this pump can be assembled incorrectly. If this gear is assembled incorrectly the thrust to the end of the pump shaft will provide an internal leak path in the pump and accelerated wear of the components.

SOLUTION:

If your machine exhibits symptoms of pump failure, the pump should be removed from the engine, examined for unusual wear and
re-assembled in a correct manner.

If the cooling system fan exhibits symptoms of pump failure, the pump should be removed from the engine, examined for unusual wear and re-assembled in a correct manner.

1. Procure the parts that are listed in the table.
2. Remove the failed 201-3786 Pump Group from the engine.



Illustration 1. Front Cover of the Engine
(1) 7C-1445 Cover As.

Note: The front drive pulley was removed and the vibration damper was removed for photographic purposes.




3. Remove the cover as. (1) from the front housing. This will expose a nut. Set this assembly aside.



Illustration 2.
(2) 196-8245 Gear
(3) 3D-0053 Bearing
(A) Surface A

4. Assembly the 3D-0053 Bearing onto the 196-8245 Gear.

Note: Ensure that the inner bearing race is seated firmly at surface A.

 

 

 

 




Illustration 3.
(4) 196-8244 Flange
(5) 6V-8002 O-Ring Seal

5. Assemble the 6V-8002 O-Ring Seal to the 196-8244 Flange.

 

 

 

 

 

 

 

 

 

 




Illustration 4.
(6) 196-8244 Flange and 6V-8002 O-Ring
(7) 194-8384 Pump As.

6. Assembly the flange assembly onto the 194-8384 Pump Assembly.

Note: Ensure the o-ring is not displaced within the flange.

 

 

 

 

 

 




 

Illustration 5.
(8) 2K-0564 Nut
(9) 8T-4223 Washer
(10) 196-8245 Gear and 3D-0053 Bearing Assembly
(11) 196-8244 Flange and 194-8384 Pump Assembly

7. Assemble the gear and bearing assembly to the flange and pump assembly. Use the 8T-4223 Washer and the 2K-0564 Nut in order to hold the gear onto the pump shaft. Tighten the nut lightly until it secures the gear. Do Not torque the nut.

 

 

 

 

 

 

 



Illustration 6.
(12) 7X-0550 Washer
(13) 7X-2550 Bolt
(14) 135-9819 Seal
(15) 8T-4244 Nut
(16) 8T-4223 Washer
(B) Surface B

8. Install the 135-9819 Seal and assemble the entire pump assembly to the front cover.

Note: Make sure that surface B of the 135-9819 Seal is mated to the back side of the front cover.

Assemble the 7X-0550 Washers to the 7X-2550 Bolts. Place the bolts through the front side of the cover. Assemble the

 

 

8T-4223 Washers and the 8T-4244 Nuts to the bolts at the back side of the pump. Torque the bolts to 100?20 N?m.



Illustration 7. Front Cover of the Engine
(1) 7C-1445 Cover As.

9. Through the port that was uncovered by the removal of the 7C-1445 Plate in step 1. Use this opening to torque the 2K-0564 Nut to 100?20 N?m. Do Not over torque this nut.

Note: The front drive pulley was removed and the vibration damper was removed for photographic purposes.

10. Assembly the cover as. (1) to the front housing.