Usage:
NOTE: This Program can be administered either before or after a failure. In either case the decision whether to apply the Program is made by the dealer. When reporting the repair, use "PS4767" as the Part Number and "7755" as the Group Number. If administered before failure, use "56" as the Warranty Claim Description Code and use "T" as the SIMS Description Code. If administered after failure, use "96" as the Warranty Claim Description Code and use "Z" as the SIMS Description Code.
NOTE: When applicable, this program must be done in conjunction with PI3242 and/or PI3244.
Termination Date
February 28, 2001Problem
A 1696880 Asphalt Shield can be installed on certain AP1055B Asphalt Pavers and on certain Barber-Greene BG-2455C Asphalt Pavers manufactured by Caterpillar. This shield will help to increase the service life of the 112-7087 Seal by minimizing entry of asphalt into the seal area. The seal is part of the 1364524 Planetary Group.
Affected Product
Model & Identification Number
AP-1055B (8BM1-390, 8BM394-396, 8BM398, 8BM414)
BG-2455C (6TN1-140)
Parts Needed
Action Required
See the attached procedure.
Service Claim Allowances
NOTE: This is a 1-hour job to install both shields when the track and planetaries are off. If required, an additional 6 hours per side will be allowed to remove the track for a maximum total of 11 hours.
NOTE: If this program is applied after failure due to oil leakage of the 112-7087 Seal, contingent damage to the 136-4524 Planetary Group is allowed. Contact CPPI at 612-493-1312 if the planetary should have to be replaced due to contingent damage.
Parts Disposition
Handle the parts in accordance with your Warranty Bulletin on warranty parts handling.
Attach.
- (1-Rework Procedure)
Rework Procedure
REWORK PROCEDURE FOR THE PLANETARY DUST SHIELD
Make every effort to combine the dust shield replacement with PI3242 or PI3244.
NOTE: If this program is not done in conjunction with PI3242 or PI3244 the planetary main seal should be checked prior to removal of the planetary. Parts required are two 3B7722 Adapters and one 8T0854, 0-140 psi gauge. Move the machine to a safe working area and stop the machine when the planetary check plugs are at the 10:00 and 1:00 o-clock position. Install the two 3B7722 Adapters into the check ports and the one 8T0854 gauge into one of the adapters. Attach a regulated air supply hose with a quick disconnect to the other 3B7722 Adapter. Pressurize the planetary with 15-20 pounds of air and remove the air supply. Monitor the gauge for five minutes for a drop in pressure. If no drop in pressure, proceed with removal of the planetary. If the pressure cannot be maintained the main seal 112-7087 will have to be replaced. Reference KENR3510 AP-1000B (7HN), BG-260C (8GN) Service Manual for disassembly instructions of the planetary.
The MTS belts will have to be removed prior to installation of the seal, reference the AP-1055B Service Manual KENR2888 for mechanical disassembly and the Service Operations and Testing Manual KENR2875 for instructions to release track tension.
1. Drain the hydraulic tank into a suitable container.
2. Remove the two high-pressure hoses from the drive motor.
3. Remove the case drain hose from the motor and high low shift hoses from the planetary HS and LS ports.
4. Disconnect the speed sensor wiring from speed sensor.
5. Remove the planetary from the side mainframe of the machine.
6. Note the position of the hydraulic motor to the planetary and remove the motor.
7. Note the position of the adapter ring and remove the ring from the planetary.
8. Drill and tap four holes in the adapter ring, use Illustration 2 as reference.
9. Reinstall the adapter ring and torque the bolts to 300 ft/lbs.
10. Reinstall the planetary and hoses to the machine.
11. Install the new 169-6880-dust shield see Illustration 1.
NOTE: 12. Refer to Service Magazine article September 14, 1998 for proper torque of the drive wheel lug nuts.
NOTE: 13. Failure to properly fill the planetary can result in failure.
NOTE: 14. Very little oil should have been lost during this procedure, but the following procedure should be used to verify proper oil level.
New Recommended Oil and Change Intervals for Planetaries
- BG-2455C (6TN & ACM)
- AP-1055B (8BM&ABB)
Description of Change: 85W140 GL-5 oil or equivalent should be used in the Propel Planetaries instead of the 80W90 recommended in the Operations and Maintenance Manuals.
The planetary oil should be changed initially at 50 hours, checked every 100 hours and changed every 500 hours. This recommendation supersedes the recommended intervals in the Operation and Maintenance Manuals.
FILLING PROCEDURE FOR PROPEL PLANETARIES ON MODELS AP-1055B, BG-2455C.
Position torque hubs so the Fill plug is at the 12 o'clock position. Fill torque hub with 5.3 quarts (10.6 pints) of 85/140 lube oil. Let set for 45 minutes minimum. Note: The 45 minutes is required for the fluid to fill the rear-bearing portion of the torque hub. Failure to wait the 45 minutes could result in bearing failure. Note: Use of the check plugs as an indication of proper oil level is not recommended for the filling procedure, a quantity of 5.3 quarts should be added to the planetary.
CHECKING PROCEDURE:
Rotate the torque hub until the plugs are at the 12, 3, and 9 o'clock position. Remove all three plugs and add lube (if needed) until fluid shows at the 3 and 9 o'clock position. If the hub is over filled let it drain until lube stops running out. Let the planetary sit for 15 minutes before replacing the plugs.
Illustration 1
Illustration 2