Graco LineLazer IV 5900 - Displacement Pump; Removal

Displacement Pump
311020Y 21
Displacement Pump
Removal
1. Flush pump.
2. Relieve pressure, page 7.
3. Fig. 15. Cycle pump piston rod (A) to lowest posi-
tion.
4. Fig. 15. Remove suction tube (34) and hose (100).
5. Fig. 16. Use screwdriver: push retaining spring up
and push out pin (235).
6. Fig. 17. Loosen locknut by hitting firmly with a 20 oz
(maximum) hammer. Unscrew pump.
Repair
See manual 310643 for pump repair instructions.
Installation
1. Fig. 18. Pull piston rod out 1.5 in. Screw in pump
until holes in bearing cross link and piston rod align.
2. Fig. 16. Push pin (235) into hole. Push retaining
spring into groove around connecting rod.
Fig. 19. Screw jam nut down onto pump until nut stops.
Screw pump up into bearing housing until it is stopped
by jam nut. Back off pump and jam nut to align pump
outlet to back. Tighten jam nut by hand, then tap 1/8 to
1/4 turn with a 20 oz (maximum) hammer to approxi-
mately 75± 5 ft-lb (102 N•m).
Fig. 20. Fill packing nut with Graco TSL unit fluid flows
onto the top of seal.
NOTICE
If pin works loose, parts could break off due to force of
pumping action. Parts could project through the air
and result in serious injury or property damage. Make
sure pin and retaining spring are properly installed.
NOTICE
If the pump locknut loosens during operation, the
threads of the bearing housing will be damaged. Make
sure locknut is properly tightened.
ti25646a
A
100
34
Fig. 15
7675B
Fig. 16
ti25648a
Fig. 17
ti25647a
1.5 in.
Fig. 18
ti25649a
Fig. 19
ti25650a
Fig. 20