HEAD GP-PUMP CONTROL 8J6312 - Caterpillar

Introduction
The problem that is identified below does not have a known permanent solution. Until a permanent solution is known, use the solution that is identified below.Problem
Note: This TIB will provide reuse specifications for the C175 lifter shaft and lifter shaft housing. Refer to Reuse And Salvage Guidelines , SEBF9186, "Specifications and Visual Inspection of Rocker Arms, Rocker Arm Shafts, Bridge Assemblies, and Lifters for C175 Engines".Solution
The 357-9456 Bolts that attach the lifter shaft to the lifter shaft housing should only be used one time. If the bolts are removed for any reason, new bolts should be installed.
Illustration 1 g06210402
384-5330 Housing As
Illustration 2 g06215204
(1) Hollow dowel
(2) Machining marks 384-5330 Housing As:
Fretting or wear is not desirable on the lifter shaft mounting face of the housing. If you can feel a wear step or any raised material on the lifter shaft mounting face of the housing, the housing should not be reused with a new lifter shaft.
If the original machining marks are visible through the wear, refer to Illustration 2 (machine marks in wear). The lifter shaft cover can be reused as long as the same shaft is installed on the same lifter shaft cover in the same orientation.
Illustration 3 g06215210
Cover orientation
Mark the lifter shaft cover similar to Illustration 3 (cover orientation) to establish orientation. Mark the lifter shaft in the same manner and number the shaft and cover.
The lifter shaft cover and lifter shaft must be installed together, and in this orientation for the parts to be reused.
Illustration 4 g06215237
The cover can be reused if the hollow dowel is damaged as shown in Illustration 4.
If the dowel is cracked or bent, the cover should not be reused.
Illustration 5 g06210435
(3) Lifter shaft housing mounting face
(4) 357-4823 Shaft As 357-4823 Shaft As:
Fretting or wear is not desirable on the lifter shaft housing mounting face of the lifter shaft. If you can feel a wear step or any raised material on the lifter shaft housing mounting face, the shaft should not be reused with a new lifter shaft cover.
As described above, the lifter shaft can be reused with the matching lifter shaft cover as long as the shaft and cover are marked and documented as a matching set.
Fretting or wear is not allowable on the 357-4823 Shaft As bolt mounting face of the lifter shaft. If you can feel a wear step or any raised material on the 357-4823 Shaft As bolt mounting face, the shaft should not be reused.