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15309379
Displacement Pump
See manual 309277 for pump repair instructions.
Removal
1. Flush pump.
2.
Relieve pressure; page 4.
3. Fig. 8. Remove suction tube and paint hose (re-
move at swivel end).
Fig. 8
pump
rod
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hydraulic
rod
4. Fig. 9. Push retaining spring up; push out pin (21).
Fig. 9
21
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5. Fig. 10. Loosen locknut with hammer. Unscrew
pump.
Fig. 10
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Installation
WARNING
If pin works loose, parts could break off and project
through the air and result in serious injury or prop-
erty damage. Make sure pin is properly installed.
CAUTION
If the pump jam nut loosens during operation, the
threads of the bearing housing and drive train will be
damaged. Tighten jam nut as specified.
1. Fig. 11. Enter Diagnostic (Manual 309378). Short
press DTS button to send hydraulic piston rod
down. Screw in pump until holes in pump rod and
hydraulic rod align.
Fig. 11
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2. Fig. 9. Push pin (21) into hole. Push retaining
spring into groove.
Fig. 12. Screw pump into hydraulic motor manifold until
it is positioned as shown. Back off pump to align pump
outlet with hose. Hand tighten jam nut, then tap 1/8
turn with hammer or torque to 150 ft–lb (203 Nm)
(233640/641), 200 ft-lb (271 Nm).
Fig. 12
Flush, within
one turn in
either direction
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Fig. 13. Fill packing nut with Graco TSL.
Fig. 13
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