20999720 Volvo.Penta Ball bearing

This Program must be administered as soon as possible. When reporting the repair, use "PI1406" 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 "PI1406" 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 March 1, 1999 Service Letter. Changes have been made to all areas of the letter.
Problem
Some D8H tractors and all D8K Tractors equipped with two dozer lift cylinders have hydraulic hoses that run from a manifold on the crosstube in the engine compartment to each lift cylinder tube assembly. These hydraulic hoses can be damaged by rubbing on the bottom edge of the hood. Failure to replace damaged hoses can result in serious injury or death if one of these hoses bursts and sprays hot hydraulic oil onto hot engine parts and the operator.
Failure to properly maintain the bearings in the crosstube and the lift cylinder trunnion can lead to the hoses contacting the hood due to excessively worn bearings in the crosstube and trunnion. Lift cylinder hoses contacting the hood results in fraying and wearing of the hydraulic hoses. A frayed hose can be weakened as the hood wears into the steel reinforcement layers or as moisture causes the steel reinforcement to corrode. When a hose is sufficiently weakened, high pressure oil in the system can cause the hose to fail. High pressure oil can then spray onto hot parts of the engine and cause a fire resulting in serious injury or death.
Location of PartsAffected Product
Model & Identification Number
D8H and D8K Track-type Tractors which are equipped with a bulldozer arrangement having two dozer lift cylinders and a hydraulic lift cylinder lines manifold on the crosstube in the engine compartment are affected.
Tractors listed below are affected provided that all of the following statements are true. If any of the following 4 statements is false, the tractor is not affected.
1. The tractor is equipped with a bulldozer.2. The tractor is equipped with two dozer lift cylinders and has a hydraulic lift cylinder lines manifold at the center of the crosstube.3. The tractor is NOT equipped with a cable dozer lift system.4. The tractor is NOT equipped with a single cylinder dozer lift system.D8H (22A1-1564 35A134-776 36A122-5722 46A45-34086 52A1-84 68A1-5903 )
D8K (66V641-6328, 66V75172-75196, 66V76672-76676 76V381-1034 , 76V75172-75184, 76V75472 77V641-18848 , 77V75172-75433, 77V78072-78101, 77V78172-78175, 77V78178-78193, 77V78195)
Parts Needed
Dealers will need to order parts for this Program.
Initially, some parts for this program are in short supply. Dealers should only order quantities that they will be using within 30 days. Dealers will not be able to return any unused parts.
D8H
Depending on how a particular tractor is configured, choose one of two D8H lift line kits and then determine if the 177-5006 Tube Assembly and 9X8873 Bolts are required for that tractor. (See Action Required)
1 - KIT-LIFT LINE (Either 170-5928 or 169-6533)1 - 177-5006 TUBE ASSEMBLY (only if required)5 - 9X8873 BOLTS (only if 177-5006 tube assembly required)Kit identification is made by viewing the lift cylinder hose connections to the manifold at the center of the crosstube. Tractors with hoses connected to the manifold with hose clamps