12818 Mercruiser HOSE, OIL COOLER TO TUBE

The information supplied in this service letter may not be valid after the termination date of this program. Do not perform the work outlined in this Service Letter after the termination date without first contacting your Caterpillar product analyst.
This Program must be administered as soon as possible. When reporting the repair, use "PI3703" as the Part Number, "7751" as the Group Number, "56" as the Warranty Claim Description Code and "T" as the SIMS Description Code. Exception: If the repair is done after failure, use "PI3703" as the Part Number, "7751" as the Group Number, "96" as the Warranty Claim Description Code, and "Z" as the SIMS Description Code.
This Revised Service Letter replaces the July 15, 1994 (Revised November 1994) Service Letter. Changes have been made to the Affected Product.
Completion Date
January 31, 1995Termination Date
July 31, 1995Problem
The 5F7404 Lock Nut may be installed backwards in the rear gear train of the engine on certain 988F and 990 Loaders; PM565 Planers; 834B Tractors; and 836 Compactors.
Affected Product
Model & Identification Number
PM565 (3TK40-67)
834B (92Z560, 92Z561, 92Z563, 92Z566-568, 92Z570, 92Z571, 92Z573, 92Z574, 92Z577, 92Z579)
836 (3RL26-35)
988F (8YG96-327, 8YG329-422, 8YG424-430, 8YG432-437, 8YG441-453, 8YG455-474, 8YG476-482, 8YG484, 8YG485, 8YG488-585, 8YG588-593, 8YG605-609)
990 (7HK28-68, 7HK71-76, 7HK78-87, 7HK89, 7HK91-94, 7HK96-99, 7HK101-104, 7HK106, 7HK110, 7HK111, 7HK115, 7HK119-122, 7HK124-126, 7HK128, 7HK130)
Parts Needed
Dealers will need to order parts for this Program.
988F
2 - 5F7403 Lock3 - 2H6338 Seal-O-Ring1 - 4J0520 Seal-O-Ring1 - 4J0524 Seal-O-Ring1 - 7J9108 Seal-O-Ring1 - 1P3705 Seal-O-Ring1 - 1P3706 Seal-O-Ring1 - 1P3707 Seal-O-Ring2 - 6V1195 Seal-O-Ring990
2 - 5F7403 Lock1 - 2H3934 Seal-O-Ring2 - 2H6338 Seal-O-Ring2 - 4J0522 Seal-O-Ring1 - 4J0527 Seal-O-Ring2 - 1P3704 Seal-O-Ring3 - 1P3705 Seal-O-Ring1 - 6V8397 Seal-O-Ring3 - 6V8398 Seal-O-Ring1 - 6V8400 Seal-O-Ring1 - 6V9746 Seal-O-Ring2 - 1076280 Seal-O-RingPM565
2 - 4F7391 Seal-O-Ring1 - 5F3106 Seal-O-Ring1 - 5F7403 Lock1 - 4J0522 Seal-O-Ring1 - 4J0524 Seal-O-Ring2 - 3K0715 Seal-O-Ring1 - 5K9090 Seal-O-Ring1 - 8T0315 Seal-O-Ring2 - 6V8398 Seal-O-Ring1 - 6V8400 Seal-O-Ring4 - 6V9746 Seal-O-Ring834B and 836
1 - 5F7403 Lock1 - 5H8848 Seal-O-Ring1 - 4J0522 Seal-O-RingAction Required
See the attached procedure.
Owner Notification
U.S. and Canadian owners will receive the attached Owner Notification.
Service Claim Allowances
988F
This is a 6.5 hour job.
990
This is a 9.0 hour job.
PM565
This is a 5.0 hour job.
834B and 836
This is a 4.5 hour job.
U.S. and Canadian Dealers Only - This Program does not qualify for a Type 2 SIMS Report.
Parts Disposition
Handle the parts in accordance with your Warranty Bulletin on warranty parts handling.
MAKE EVERY EFFORT TO COMPLETE THIS PROGRAM AS SOON AS POSSIBLE.
Attach.(1-Owner Notification)(2-Rework Procedure)Copy Of Owner Notification For U.S. And Canadian Owners
Rework Procedure
Refer to the attached illustration for proper orientation of the 5F7404 Nut. A 5P7323 Spanner Socket is needed for this rework.
988F
1. Remove the cap from the hydraulic tank to relieve back pressure. If the hydraulic tank is at or below the full mark, no hydraulic oil needs to be drained.2. Remove the 4E4517 Hood and Guard Group (upper section with the gull wing doors) as one unit. A crane with a 6.1 meter (20 foot) boom will be needed.3. Remove the 4E4506 and 4E4512 Hydraulic Pumps.4. Remove both 4P4975 Power Take Off Adapters in the 4P3581 Rear Gear Group so that the 5P7323 Spanner Socket can be used to remove the 5F7404 Bearing Lock Nut. Be sure to bend back the retaining tab on the 5F7403 Nut Lock before removing the 5P7404 Nut.
5. Using a new 5F7403 Nut Lock, install the 5F7404 Nut as shown in the illustration.6. Tighten the nut to a torque of 406 68 N?m (300 50 lb ft).7. After the lock nut is tightened to the correct torque, bend one of the tabs of the 5F7403 Nut Lock into one of the four slots of the nut. If none of the tabs line up with any of the slots, tighten the nut further until one of the tabs does line up.8. Replace the 2H3935 Seal-O-Rings (the seals between the two hydraulic pumps and the 4P4985 Power Take Off Adaptors) with 6V1195 Seal-O-Rings.9. Finish assembling the machine.990
1. Drain and capture 30 gallons of hydraulic oil from each hydraulic tank.2. Remove the 9U1120 and 9U1112 Cover Assemblies of the 8R5651 Operator Platform Group to gain access to the hydraulic pumps/lines.3. Remove the 6E4657 Pilot Pump (located between the power takeoff adaptors) to gain access to several bolts retaining the hydraulic pumps to the 4P2707 PTO Adapters. Replace the two existing 6V1820 Bolts that retain the pump with two new 1156929 Bolts (12 point 10mm socket). Tighten the bolts to a torque of 55 10 N m (40 7 lb ft).
4. Separate the 6E3321 and 6E5244 Hydraulic Pumps into two sections to gain access to the bolts holding the double hydraulic pumps to the rear of the engine. Use a 30mm socket to remove and install the 6V3531 Bolts (tighten to a torque of 460 60 N m (340 45 lb ft)). Use a 12-point, 20mm socket to remove and install the 9X8906 Bolts (tighten to a torque of 460 60 N m (340 45 lb ft)).
5. Remove the 6E3321 and 6E5244 Hydraulic Pumps.6. Use a 5P7323 Spanner Socket to remove the 5F7404 Bearing Lock Nut. The 4P2707 Power Takeoff Adapters (part of 4P3582 Rear Gear Group) do NOT need to be removed to gain access to the 5F7404 Nuts. Be sure to bend back the retaining tab on the 5F7403 Nut Lock before removing the 5P7404 Nut.
7. Using a new 5F7403 Nut Lock, install the 5F7404 Nut as shown in the illustration.8. Tighten the nut to a torque of 406 68 N?m (300 50 lb ft).9. After the lock nut is tightened to the correct torque, bend one of the tabs of the 5F7403 Nut Lock into one of the four slots of the nut. If none of the tabs line up with any of the slots, tighten the nut further until one of the tabs does line up.10, Replace the 8T7568 O-Rings (seals between the hydraulic pumps and the PTO Adapters) with 1076280 O-Rings.11. Finish assembling the machine.12. Install the hydraulic oil removed in