Displacement Pump Repair
Fig. 31
1
3
4
2
0085
224
205
216
*209
*207
213*
225*
*202
*202
*208
211
212*
218
219
*210
*206
*215
203*
*214
222
*221
220
204*
223
Lips of throat v–packings must face up
Lips of piston v–packings must face down
Lips of U–cup packing must face down
Leather
5
Poly
1
1
3
2
2
4
4
5
5
6
Torque to 64 N.m
6
Installing the pump
Fig. 32
20
21
56
9
6
1
Torque to 95 N.m
2
Face of bearing housing
2
1
22
01579
1. Screw the pump 3/4 of the way into the bearing
housing (6). Hold the pin (20) up to the pin hole in
the connecting rod (9) and continue screwing in
the pump until the pin slides easily into the hole.
See Fig. 32.
2. Align the top threads of the pump cylinder flush
with the face of the bearing housing and so the
outlet nipple (22) is straight back. See Fig. 32.
WARNING
Be sure the retaining spring (21) is firmly in the
groove of the connecting rod, all the way around, to
prevent it from working loose due to vibration. Refer
to Fig. 32.
If the pin works loose, parts could break off due to the
force of the pumping action. These parts could be
projected through the air and result in serious bodily
injury, sprayer damage or property damage.
3. Push the retaining spring (21) into the groove of
the connecting rod, all the way around. Tighten the
locknut (56) very tight – 95 N.m, to prevent it loos-
ening and damaging the threads of the bearing
housing. See Fig. 32.
4. Assemble the remaining parts.
