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

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Illustration 1	g03887671

1. Use Tooling (E) to remove retaining nut (1). Remove retaining nut (1).
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   Illustration 2	g03362863

2. Use Tooling (A) to remove suction cover (2). Remove suction cover (2).
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   Illustration 3	g03887669

3. Remove suction cover seal (3).
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   Illustration 4	g03362866
   Grooveless style retainer (5).

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   Illustration 5	g03362924

   Note: Step 4 is for grooveless style retainers (5) only.

4. Rotate pinion (6) to reposition plunger (4). Reposition plunger (4) to remove valve retainer (5). Remove valve retainer (5).
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   Illustration 6	g03362867

   Note: Plunger clamp (7) halves are matched pairs. Place identification marks on clamp (7) for installation purposes.

5. Remove bolts (8) and plunger clamp (7).
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   Table 2

   Approximate weight of plunger (4)
   Sales Model	Bore Diameter	Approximate Weight
   WS223 WS223 SS WSF223 WSF223 XD WSF223 SS	114.3 mm (4.50 inch)	31 kg (68 lb)
   	127.0 mm (5.00 inch)	28 kg (62 lb)
   WS255 WS255 SS WSF255 WSF255 SS	101.6 mm (4.00 inch)	24 kg (53 lb)
   	114.3 mm (4.50 inch)	31 kg (68 lb)
   	127.0 mm (5.00 inch)	28 kg (62 lb)

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   Illustration 7	g03362924

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   Illustration 8	g03362868

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   Illustration 9	g03362922

6. Use Tooling (B) to loosen Packing nut (10). Rotate pinion (6) to remove plunger (4). Use a suitable spacer and pony rod (9) to remove plunger (4). Attach a suitable lifting device to plunger (4). Refer to Table 2 for the approximate weight of plunger (4).
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   Illustration 10	g03406757

7. Use Tooling (B) to remove packing nut (10). Remove packing nut (10), lantern ring (14), V-notch ring (13), header and pressure rings (12), and junk ring (11).
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   Illustration 11	g03362929

8. Remove wiper seal (15) from packing nut (10).

Installation Procedure

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Illustration 12	g03406757

1. Install junk ring (11), header and pressure rings (12), V-notch ring (13), lantern ring (14), and packing nut (10). Tighten packing nut (10) by hand.
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   Illustration 13	g03362922

2. Apply a thin layer of Tooling (C) to the outer surface of plunger (4). and inner surface of the installed packing. Attach a suitable lifting device to plunger (4). Refer to Table 2 for the approximate weight of plunger (4). Use a suitable hammer and a suitable brass punch to install plunger (4).
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   Illustration 14	g03362929

3. Install wiper seal (15) with the o-ring facing out towards the power end, into packing nut (10).
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   Illustration 15	g03369636

4. Use Tooling (B) to install packing nut (10). Install packing nut (10).
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   Illustration 16	g03362924

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   Illustration 17	g03369696

5. Rotate pinion (6) to align pony rod (9) and plunger (4).

6. Apply Tooling (F) to the threads of bolts (8). Install plunger clamp (7) and bolts (8).
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   Illustration 18	g03493318
   Grooveless valve retainer (5).

7. Install valve retainer (5).
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   Illustration 19	g03362865

8. Install suction cover seal (3) onto cover (2). Apply Tooling (C) to suction cover seal (3) before installing cover (2).
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   Illustration 20	g03369836

9. Install suction cover (2).
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   Illustration 21	g03887671

10. Apply Tooling (D) to the threads of retaining nut (1). Use Tooling (E) to tighten retaining nut (1) to a torque of 3254 N·m (2400 lb ft).