Power End Rebuild Inspection Checklist for Well Stimulation Pumps {1202} Caterpillar

Well Stimulation Pump

WS223 (S/N: SR31-UP)

WS223 SS (S/N: BM31-UP)

WS223 XD (S/N: SR41-UP)

WS255 (S/N: SR51-UP)

WS255 SS (S/N: BM51-UP)

WS255 XD (S/N: SR61-UP)

WS273 XD (S/N: DG21-UP)

WS305 XD (S/N: EA21-UP)

Well Stimulation Pump Power End

WSP223 (S/N: FNJ1-UP)

WSP255 (S/N: FNK1-UP)

WSP273 (S/N: DG31-UP)

WSP305 (S/N: EA31-UP)

Introduction

Do not perform any procedure in this Inspection until you have read the information and you understand the information.

Customer Information

Date ____________________________________________________________________________________________________

Pump Serial Number ____________________________________________________________

Customer ____________________________________________________________________________________________________

Pinion and Gear Backlash

Illustration 1	g06026134
Offput side (1) Backlash (2) Load location

Illustration 2	g06026097
Drive side (1) Backlash (2) Load location

Note: Measurements to be taken before disassembly

Rotate the pinion to the correct position as shown in Illustration 1. While the pinion is in the "loaded" position, check for load and backlash.

Drive Side Current Backlash ________________________________________=X

Drive Side Original Backlash ________________________________________=Y

Offput Current Backlash ____________________________________________________________=X

Offput Original Backlash ____________________________________________________________=Y

Drive Side Total Wear ____________________________________________________________=X-Y

Offput Total Wear ____________________________________________________________=X-Y

Check Gear Load ____________________________________________________________

Pinion Float

Illustration 3	g06026100

Place a dial indicator on the external face of the pinion bearing housing with the indicator plunger on the face of the pinion.

Note: Dial indicator placement is easiest from the offput side.

Measure and record the total travel distance of the pinion.

Pinion Float ____________________________________________________________

Crankshaft Float

Illustration 4	g06026102
Crankshaft float before gears

Illustration 5	g06026105
Crankshaft float after gears

Place a dial indicator on the outside of the power frame with the indicator plunger on the face of the bull gear. Measure the total travel distance of the crankshaft.

Original Crankshaft Float

With Gears ____________________________________________________________

Without Gears ____________________________________________________________

Current Crankshaft Float

With Gears ____________________________________________________________

Without Gears ____________________________________________________________

Inspector Initials ________________________________________________________________________________

Visual Inspection of Pinion and Bull Gears

Notes:

________________________________________________________________________________________________________________________

________________________________________________________________________________________________________________________

________________________________________________________________________________________________________________________

________________________________________________________________________________________________________________________

Crosshead Guide Tube Measurement

Illustration 6	g06026110

Use a feeler gauge to measure the clearance between the crosshead and guide tube.

Note: Measure along the top half of the crosshead.

Crosshead Running Clearance

#1 ____________________________________________________________________________________________________

#2 ____________________________________________________________________________________________________

#3 ____________________________________________________________________________________________________

#4 ____________________________________________________________________________________________________

#5 ____________________________________________________________________________________________________

Total maximum clearance on diameter is 1.143 mm (0.045 inch). The maximum clearance per side is 0.584 mm (0.023 inch).

New pump tolerance per side is 0.279 mm to 0.381 mm (0.011 inch to 0.015 inch).

Inspector Initials ________________________________________________________________________________

Main Roller Bearing Clearance

Illustration 7	g06026114

Use a feeler gauge to measure the clearance between the roller bearings and the outer race.

Note: Measure along the top half of the bearings.

Main Roller Bearing Clearance

#1 ____________________________________________________________________________________________________

#2 ____________________________________________________________________________________________________

#3 ____________________________________________________________________________________________________

#4 ____________________________________________________________________________________________________

#5 ____________________________________________________________________________________________________

Total maximum clearance is 0.381 mm (0.015 inch).

New pump tolerance is 0.076 mm to 0.177 mm (0.003 inch to 0.007 inch).

Inspector Initials ________________________________________________________________________________

Reference Section

Reference: Disassembly and Assembly, UENR3290 for additional information.

Reference: Disassembly and Assembly, UENR6796 for additional information.