Displacement Pump
52 A
51
50
6
76
75
74
Torque to
80 ft±lb (107 N.m)
Fig. 14
49
223
30
32
4
222
3
01746B
Repairing the pump
See manual 307±806 for pump repair instructions.
Reinstalling the pump See Fig. 14 and 15.
1.Rotate the crankshaft (A) so the connecting rod is in its lowest position.
2.The pump piston rod (223) should protrude about 1 in. (25 mm) above the pump cylinder.
3.Screw the pump into the bearing housing (51) until its pin hole is aligned with the connecting rod (52) pin hole. Insert the pin (50). Position the spring (49) so it covers the ends of the pin. See Fig. 15.
WARNING
Be sure the retaining spring (49) is firmly and com- pletely in the groove of the connecting rod to prevent the pin (50) from working loose due to vibration.
If the pin works loose, it or other parts could break off due to the force of the pumping action, resulting in serious bodily injury, pump or property damage.
4. | Adjust the pump so the cylinder's top threads are |
| flush with the face (B) of the bearing housing and |
| the outlet nipple (32) is straight back. See Fig. 15. |
5. | Torque the locknut (6) to 80 |
WARNING
INJECTION HAZARD
To reduce the risk of serious bodily injury, follow the Pressure Relief Proce- dure Warning on page 11 before check-
ing or repairing any part of the spray system.
6. Reassemble the remaining parts, in the reverse |
order of removal. |
Removing the pump See Fig. 14.
1.Flush the sprayer. Relieve pressure.
2.Remove the clips (74,76) and drain hose (75).
3.Hold the intake valve (222) steady with a wrench and unscrew the suction tube (3).
4.Use a screwdriver to push the retaining spring (49) up, and then push out the pin (50).
5.Loosen the locknut (6). Unscrew the pump (4).
50
49
B
Fig. 15
52
51
32
01751A
14 78
