Usage:
SEBE7257-02
April 6, 2000
(Revised March 2001)
U-110
A-88
AU-64
S-48
H-36
O-95
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After failure only Parts stock action needed |
PRODUCT SUPPORT PROGRAM FOR REPLACING THE STEERING DIVERTER VALVE ON CERTAIN CH65C, CH65D, CH65E, CH70C, CH75C, CH75D, CH75E, CH85C, CH85D, CH85E, AND CH95E CHALLENGER TRACTORS |
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5066 |
PS50033 |
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NOTE: This Program can only be administered after a failure occurs. The decision whether to apply the Program is made by the dealer. When reporting the repair, use "PS50033" as the Part number and "7755" as the Group Number. Use "96" as the Warranty Claim Description Code and use "Z" as the SIMS Description Code.
NOTE: Although this Program is to be administered as described above on the Affected Product, parts should be removed from parts stock as soon as possible.
NOTE: This Revised Service Letter replaces the April 6, 2000 (Revised May 2000) Service Letter. Changes have been made to the Termination Date.
TERMINATION DATE
April 30, 2002
PROBLEM
Oil can transfer from the hydraulic implement/steering system to the transmission. The hydraulic oil contaminates the transmission oil, affecting the TO4 properties. Transmission damage can result from the lowered friction coefficients, allowing excessive slippage and premature clutch wear. A possible source of this transfer is leakage at the steering diverter valve. Leakage through the steering diverter valve needs to be checked. If excessive, the current valve should be replaced with a new, improved design valve, and the transmission oil and filter changed.
AFFECTED PRODUCT
***** Group 1 *****
Model Identification Number
CH65E 6GS1-551
CH75E 6HS1-201, 203-276, 278, 280-565
CH85E 6JS1-296, 298-584
CH95E 6KS1-792
***** Group 2 *****
Model Identification Number
CH65C 2ZJ1-1964
CH70C 2YL1-Up
CH75C 4KK1-Up
CH85C 9TK1-Up
CH65D 2ZJ1965-Up
CH75D 5AR1-Up
CH85D 4GR1-Up
PARTS NEEDED
***** Both Groups *****
2 - 3J7354 SEAL-O-RING
4 - 3K0360 SEAL-O-RING
1 - 9T0973 FILTER-OIL
1 - 1732075 VALVE GP-DVT
ACTION REQUIRED
***** Parts Stock *****
Remove all 9T-1823 Valve and Mounting Groups from parts stock.
***** Affected Product *****
See the attached Rework Procedures for the respective tractor Groups.
SERVICE CLAIM ALLOWANCES
***** Parts Stock *****
Submit one claim for all 9T-1823 Valve and Mounting Groups removed from parts stock.
***** Affected Product *****
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Product smu |
Caterpillar |
Dealer Suggested |
Customer Suggested |
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Parts |
Labor Hrs |
Parts |
Labor Hrs |
Parts |
Labor Hrs |
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***** Group 1 ***** |
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0-3000 |
100% |
4.0* |
0 |
0 |
0 |
0 |
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3001-5000 |
33.3% |
2.0* |
0 |
2.0 |
50% |
0 |
NOTE: This is a 4- hour job. NOTE: Only 1/2 of the labor listed is allowed if oil leakage was checked and no valve replacement was made. |
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***** Group 2 ***** |
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0-3000 |
100% |
2.0* |
0 |
0 |
0 |
0 |
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3001-5000 |
33.3% |
1.0* |
0 |
1.0 |
50% |
0 |
NOTE: This is a 2- hour job. NOTE: Only 1/2 of the labor listed is allowed if oil leakage was checked and no valve replacement was made. |
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PARTS DISPOSITION
Handle the parts in accordance with your Warranty Bulletin on warranty parts handling.
Attach. (1-Rework Procedure)
Rework Procedure
If oil transfer from the hydraulic implement/steering system to the transmission is suspect, leakage at the steering diverter valve should be checked. If excessive, a new design valve should be installed, and the transmission oil and filter changed. Complete the following steps for the respective Affected Product groups.
Group 1
:1) Move the tractor to a flat, level area. Engage the parking brake.
2) Locate the existing steering diverter valve group mounted on the left hand side of the transmission. (Refer to Illustration 1.) Note that access to the valve group might be easiest through the opening in the left hand side of the cab floor below the floor mat and trainer seat.
3) Make sure the area around the existing diverter valve is clean to prevent dirt contamination during the testing and replacement process.
4) Disconnect the signal line from the transmission. (Refer to Illustration 2.) Check for leakage at the diverter valve port while the engine is running, the transmission is in NEUTRAL, and steering input is provided. Very little oil should be leaking at the port. If leakage is acceptable, reattach the signal line. If leakage is excessive, proceed with replacement of the diverter valve, as outlined in the following steps. (Leakage in excess of 10 mL (0.34 oz) in 20 minutes is considered excessive.)
NOTE: DO NOT put the steering system in a stall condition for more than 15 seconds at a time. After 15 seconds, excessive heat will be generated in the steering system.
NOTE: DO NOT put the machine in gear with an uncapped transmission signal line.
5) Remove the remaining oil lines attached to the existing valve, mark location, and cap.
6) Remove the four (4) 7X-3364 Bolts and four (4) 8T-0328 Hard Washers attaching the valve group. Retain.
7) Install the new 173-2075 Diverter Valve Gp. using the fastener hardware removed in Step 6.
8) Reattach the oil lines removed in Steps 4 & 5, as previously marked. Use new seals at the fittings.
2 - 3J-7354 Seal - O-Ring
4 - 3K-0360 Seal - O-Ring
9) Drain the transmission oil. Replace the 9T-0973 Transmission Oil Filter. Refill the transmission using an appropriate oil as specified in the tractor Operation & Maintenance Manual. Refill capacity is 57L (15 gal).
10) Check for oil leakage and proper operation.
Group 2:
1) Move the tractor to a flat, level area. Engage the parking brake.
2) Locate the existing steering diverter valve group mounted at the rear of the transmission. (Refer to Illustration 3.)
3) Make sure the area around the existing diverter valve is clean to prevent dirt contamination during the testing and replacement process.
4) Disconnect the signal line from the transmission. (Refer to Illustration 4.) Check for leakage at the diverter valve port while the engine is running, the transmission is in NEUTRAL, and steering input is provided. Very little oil should be leaking at the port. If leakage is acceptable, reattach the signal line. If leakage is excessive, proceed with replacement of the diverter valve, as outlined in the following steps. (Leakage in excess of 10 mL (0.34 oz) in 20 minutes is considered excessive.)
NOTE: DO NOT put the steering system in a stall condition for more than 15 seconds at a time. After 15 seconds, excessive heat will be generated in the steering system.
NOTE: DO NOT put the machine in gear with an uncapped transmission signal line.
5) Remove the remaining oil lines attached to the existing valve, mark location, and cap.
6) Remove the four (4) 7X-3364 Bolts and four (4) 8T-0328 Hard Washers attaching the valve group. Retain.
7) Install the new 173-2075 Diverter Valve Gp. using the fastener hardware removed in Step 6.
8) Reattach the oil lines removed in Steps 4 & 5, as previously marked. Use new seals at the fittings.
2 - 3J-7354 Seal - O-Ring
4 - 3K-0360 Seal - O-Ring
9) Drain the transmission oil. Replace the 9T-0973 Transmission Oil Filter. Refill the transmission using an appropriate oil as specified in the tractor Operation & Maintenance Manual. Refill capacity is 55.7 L (14.7 gal.) for the C-Series tractors, and 57 L (15 gal) for the D-Series tractors.
10) Check for oil leakage and proper operation.
Illustration 1:
Sketch of left hand side of Challenger E-Series transmission showing location of the steering control diverter valve gp.
Illustration 2: Top view sketch of Challenger E-Series transmission showing location of the steering control diverter valve group signal line and signal line port.
Illustration 3:
Right side and partial rear view of C- and D-Series Challenger tractor transmission showing location of the steering control diverter valve gp
Illustration 4: Rear view sketch of C- and D-Series Challenger tractor transmission showing location of the steering control diverter valve group signal line and signal line port.