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 Caterpillar

Removal Procedure

Start By:

1. Remove the cross rod.

2. Remove the bull gear.

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Illustration 1	g03397395

1. Install Tooling (A) to prevent bearing housings (1) from turning. Position bearing housings (1) to clear the frame assembly during crankshaft removal.
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   Illustration 2	g03397400

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   Illustration 3	g03397396

   Note: Note the quantity and orientation of the shim or shims behind the retainers (3) and retainer (5).

2. Remove flat head screws (2) and retainer (3) on the left side (drive side). Remove flat head screws (4) and retainer (5) on the right side (off put side).
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   Table 2

   Approximate weight of crankshaft (7) and Tooling (C)
   Sales Model	Tooling (C)	Crankshaft (7)
   WS223 WSP223 WS223 SS WS223 XD	193 kg (425 lb)	880 kg (1940 lb)
   WS255 WSP255 WS255 SS WS255 XD	193 kg (425 lb)	1111 kg (2450 lb)

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   Illustration 4	g03397397

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   Illustration 5	g03529957

3. Install Tooling (B) into oil fitting (6). Use Tooling (B) to help guide crankshaft (7) in and out of the frame assembly.

4. Attach Tooling (C) and a suitable lifting device to remove crankshaft (7). Refer to Table 2 for the approximate weight of crankshaft (7) and Tooling (C).
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   Illustration 6	g03529996

5. Use Tooling (D) to press out crankshaft (7).

Installation Procedure

1. Install crankshaft (7) in the reverse order of removal.

   1. Install outer races for the #1 bearing and #6 bearing (quintuplex). Install outer races for the #1 and #4 bearing (triplex).

   2. Apply Tooling (E) to the threads of flat head screws (2) and (4).

   3. Tighten flat head screws (2) and (4) to a torque of 87 N·m (64 lb ft).
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      Table 3

      Allowable Tolerances for Crankshaft Total Float Travel
      Sales Model	Total Float Travel Dimension
      WS223 WSP223 WS223 SS WS223 XD	0.48 to 1.49 mm (0.019 to 0.059 inch)
      WS255 WSP255 WS255 SS WS255 XD	0.25 to 0.89 mm (0.010 to 0.035 inch)

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      Illustration 7	g03888886

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      Illustration 8	g03529998

   4. Install spacer ring (8) on the crankshaft. The side with the radius faces away from the crankshaft.

      Note: WS223 uses one spacer ring (8) installed on the drive side. WS255 uses two spacer rings (8). One installed on the drive side and one on the off-put side

   Note: To check the crankshaft total float travel measurement. Use a dead blow hammer to hit the crankshaft (7) towards the left side (drive side) until travel stops. Install Tooling (F) and set Tooling (F) to zero. Hit the crankshaft (7) back towards the dial indicator until travel stops. Note the travel and record the measurement.

2. Use Tooling (F) to check the crankshaft total float travel measurement. Refer to Table 3 for the crankshaft total float travel tolerances.