Pre-Assembly of the Pinion Shaft For Well Stimulation Pumps {5070} Caterpillar


Pre-Assembly of the Pinion Shaft For Well Stimulation Pumps {5070}

Usage:

WS223 SS BM3
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

This Special Instruction is intended to give information on pre-assembling the pinion shaft on well stimulation pumps.

Safety Section

Do not perform any procedure outlined in this Special Instruction unless you have read and understand all of the information in this Special Instruction.

Ensure that you are using the proper safety equipment when using a torch to heat up the parts as outlined in this Instruction.

Pinion Bearing Installation

Note: Thoroughly clean any excess oil or preservative from the pinion shaft and pinion gear teeth.

Note: Check the pinion bearing surface and shoulder for any discrepancies.

Note: Clean excess oil off the pinion roller bearings before heating them.



    Illustration 1g03878653
    Pinion shaft output side


    Illustration 2g03878660
    Pinion bearing fully installed against shoulder
    (1) Pinion bearing

  1. Place the roller bearings in a dry oven or induction heater and heat the bearings to 121° C (250° F) to 135° C (275° F). Once the bearings reach the specified temperature, install onto the pinion shaft. Ensure the inner race of the bearing sits flush against the pinion bearing shoulder.

  2. Rotate roller bearing to confirm it moves freely.

  3. Allow the roller bearings to cool off before installing into power frame.

Pinion Bearing Removal

  1. Once the pinion has been removed from the frame, mount on a roller stand.


    Illustration 3g03878674
    Pinion bearing being removed with blue flame

  2. Using a rosebud torch, heat the bearing evenly as the pinion is spun on the roller stand.

  3. When the bearing becomes loose, remove bearing by hand.

    Note: If the bearing gets stuck, lightly tap the bearing with a rubber mallet until the bearing becomes free.

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