General Pump Pump Installation and Service Manual - Manual (Page 10)

SERVICING YOUR
PUMP
VALVE ASSEMBLIES (Figure 1)
1. All inlet and discharge valves can be serviced
without disrupting the inlet or discharge
plumbing. The inlet and discharge valves
are identical in all models.
2. To service any valve, remove valve cap and
extract valve assembly.
3. Examine o-rings and replace if there is any
evidence of cuts abrasions or distortion.
4. Remove valve assembly (retainer, spring valve,
valve seat) from valve cavity.
5. Remove o-ring from valve cavity.
6. Only one valve kit is necessary to repair all the
valves in the pump. The kit included new o-rings,
valve seat, poppet, spring and retainer, all
pre-assembled.
7. Install new o-rings in valve cavity.
8. Insert assembly into valve cavity.
9. Replace valve cap and torque to specifications.
REMOVING MANIFOLD HEAD (Figure 2)
1. Remove the fasteners retaining the head.
2. Separate head from crankcase. NOTE: It may be
necessary to tap head lightly with rawhide
mallet to loosen. CAUTION: When sliding head
from crankcase use caution not to damage plungers.
3. The V-packing assemblies may come off with
the head. At this point, examine plungers.
Plunger surfaces should be smooth and free
from scoring or pitting; if not, replace.
4. Reinstall manifold head and torque to
specifications per sequence described below.
TORQUE SEQUENCE FOR TIGHTENING HEAD
(Figure 4)
Install all head bolts fingertight. Torque to 10 foot pounds
in sequence as shown, then retorque to specifications,
again in sequence shown.
10
1
2
4