SHIM 2S7069 - Caterpillar

Well Stimulation PumpWS223 (S/N: SR31-UP)WS223 SS (S/N: BM31-UP)WS223 XD (S/N: SR41-UP)WS273 XD (S/N: DG21-UP)WS305 XD (S/N: EA21-UP)Well Stimulation Pump Power EndWSP223 (S/N: FNJ1-UP)WSP273 (S/N: DG31-UP)WSP305 (S/N: EA31-UP)Introduction
This Special Instruction is intended to give information on assembling the crankshaft bearing housings for certain well stimulation pumps.Do not perform any procedure in this Special Instruction until you have read the information and you understand the information.Also ensure that you are following all safety precautions while you are performing the procedures outlined in this document.Required Parts
Table 1
WS223
Part Number Description Qty
3B-4516 Lockwasher 12
3G-8479 Pin (Dowel Pin) 6
491-6750(1) Bearing As 3
459-1876 Stud 18
459-4116 Bolt 12
(1) The 491-6750 Bearing As contains the 434-9877 Bearing and the 434-9878 Bearing.
Table 2
WS273
Part Number Description Qty
3B-4516 Lockwasher 12
3G-8479 Pin (Dowel Pin) 6
499-4779(1) Bearing As 3
459-1876 Stud 18
459-4116 Bolt 12
(1) The 499-4779 Bearing As contains the 435-0003 Bearing and the 435-0004 Bearing.
Table 3
WS305
Part Number Description Qty
3B-4516 Lockwasher 20
3G-8479 Pin (Dowel Pin) 10
499-4779 Bearing As 5
459-1876 Stud 30
459-4116 Bolt 20 Installation Procedure
Note: Bearing housings are installed onto the crankshaft after the main bearings are installed.Note: Each bearing housing is mated with a cap half and a rod half. The two mated halves MUST stay paired together.Note: The WS223, WS273, and WS305 bearing housing cap half should have two external dowel pins welded in place to retain the cap half bearing. The internal depth of the dowel pin should be 6.35 mm (0.25 inch).Note: Use caution when installing the thrust bearings. Ensure that the thrust bearings are aligned correctly into the bearing housing.Note: Ensure that all components are thoroughly cleaned.Note: WS223 Rod half bearing will have a lube groove in the center. This bearing half is not illustrated in this work instruction.
Illustration 1 g06034170
Cap half of the bearing
(1) 3G-8479 Pin (Dowel Pin)
Illustration 2 g06034172
Rod half of the bearing
Separate the rod half from the cap half.
Illustration 3 g06034179
Rod half of the bearing
(2) 459-1876 Stud
Apply Loctite 263®