Specifications

18
19
Servicing the Piston Rod - Outlet Valve
331-196
331-195
Piston
DISASSEMBLY OF THE OUTLET VALVE
REFER TO FIGURE 13
1. Disconnect the Fluid Pump.
2. Place piston holder (331-195) in a vise. Slide piston into
the holder & lock in place with a 3/8” dowel (331-196).
3. Use a 1/4” allen wrench to unscrew the outlet seat retainer
(331-314) from the piston.
4. Remove the outlet seat (331-026), O-ring (331-100) and
outlet ball (331-027).
5. Inspect outlet ball & seat for wear. Replace as necessary.
6. While piston is still locked in the holder, install parts
back into the piston in the following order:
ball, outlet seat and O-ring
Before reinstalling the outlet seat retainer, apply two drops of
Loctite No. 242 (blue) on the threads & torque to 20 ft-lbs.
Servicing the Suction Assembly
Refer to Figure 14
1. Unthread and remove suction nut from the 
uid pump body.
2. Remove suction seat (331-409), O-ring (106-01
1), suction ball
(331-030) and suction retainer (331-029).
3. Clean all parts and inspect them for wear or damage, replacing
parts as needed.
4. Clean inside of the 
uid pump body.
5. Reassemble lower suction valve assembly by placing the
suction seat (331-409), O-ring (106-011), suction ball (331-030)
& suction ball guide (331-029) in the suction nut (331-034) &
screw onto  uid pump body.
Figure 13
Figure 14