Fluid End Inspection for Well Stimulation Pumps {0372, 5070, 7000} Caterpillar

Fluid End Inspection for Well Stimulation Pumps {0372, 5070, 7000}

Usage:

Well 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: AE31-UP; BM51-UP); WS255 XD (S/N: SR61-UP); WS273 XD (S/N: DG21-UP); WS305 XD (S/N: EA21-UP); WSF223 (S/N: FN41-UP; FNL1-UP); WSF223 SS (S/N: BM41-UP; BM81-UP); WSF223 XD (S/N: FN31-UP; FNM1-UP); WSF243 SS (S/N: RX21-UP; RX31-UP; RX41-UP; RX51-UP); WSF243 XD (S/N: FN91-UP; FNC1-UP; FND1-UP; FNE1-UP); WSF253 SS (S/N: RWC1-UP; RWD1-UP); WSF253 XD (S/N: FN81-UP; FNT1-UP); WSF255 (S/N: AE51-UP; FN51-UP; FN61-UP; FN71-UP); WSF255 SS (S/N: AE41-UP; BM61-UP; BM71-UP; BM91-UP); WSF255 XD (S/N: AE21-UP; FN21-UP; P231-UP; FNP1-UP); WSF273 XD (S/N: DG41-UP; DG51-UP; DG61-UP); WSF275 SS (S/N: RX61-UP; RX71-UP; RX81-UP; RX91-UP); WSF275 XD (S/N: FNB1-UP; FNF1-UP; FNG1-UP; FNH1-UP); WSF305 XD (S/N: EA41-UP; EA51-UP; EA61-UP; EA71-UP)

Introduction

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

Safety Section

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NOTICE

Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting, and repair of the product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids. Refer to Special Publication, NENG2500, "Dealer Service Tool Catalog" for tools and supplies suitable to collect and contain fluids on Cat^® products. Dispose of all fluids according to local regulations and mandates.

Reference

Disassembly and Assembly, UENR3290, WS273 XD, WS305 XD, WSF273 XD, WSF305 XD, WSP273, and WSP305 Well Stimulation Pumps

Disassembly and Assembly, UENR6796, WS223, WS223 SS, WS223 XD, WS255, WS255 SS, WS255 XD, WSP223, WSP255, WSF223, WSF223 SS, WSF223 XD, WSF255, WSF255 SS, and WSF255 XD Well Stimulation Pumps

Reuse And Salvage Guidelines, SEBF9374, Specifications and Salvage for Well Stimulation Fluid End

Disassembly and Cleaning

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Illustration 1	g06125098
(1) Discharge side (2) Suction side (3) Off-put side (4) Manifold side (5) Plunger/packing side

To ensure that a thorough inspection is being completed, all components and contaminates must be removed from the internals of the fluid end. This will allow the inspector to have a clear view of the internals of the fluid end and visually see any damage that may be present.

Visual Inspection

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Illustration 2	g06125104
Crack at intersecting bore

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Illustration 3	g06125111
Washout in suction sealing area

Inspect the fluid end for the following:

Cracks
Washout (erosion of the fluid end)
Major pitting
Excessive wear in sealing areas
Thread damage

Inspect each bore of the fluid end on all sides and document all notes for each individual bore to determine what bores are repairable. Certain areas in the fluid end can be repaired while others cannot.

All sealing surfaces MUST be dimensionally inspected to determine if the fluid end is still within tolerance. These critical areas include the following:

Packing Bores
Suction Seal Area
Discharge Seal Area
Discharge/Suction Seat Sealing Area

Note: If any of these areas are out of spec, the possibility for a wash out failure increases significantly.

Fluid End Failure Report

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Illustration 4	g06124638
(6) Drive side

The Bore number sequence can change from customer to customer. The standard sequence used for Cat manufactured fluid ends begin from the drive side (engine/transmission side) of the fluid end with bores 1 through 5.

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