General Pump 47 Series User Manual

47 Series
GENERAL PUMPA member of the Interpump Group
TRIPLEX TRIPLEX
Triplex Plunger Pump
SERVICING INSTRUCTIONS
General Pump
is a member of
the Interpump Group
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.
1
2
4

General Pump 47 Series Specifications

General

Brand	General Pump
Model	47 Series
Category	Water Pump
Language	English

Summary

Valve Assemblies Servicing

Service Valve Assembly

Remove valve cap, extract assembly, examine o-rings for damage.

Install New Valve Components

Use valve kit, install new o-rings, insert assembly, replace cap.

Removing Manifold Head

Detach Manifold Head

Remove fasteners and separate head from crankcase with care.

Inspect Plungers

Examine plunger surfaces for scoring or pitting.

Reinstall Manifold Head

Reinstall head and torque to specifications.

Torque Sequence for Tightening Head

Replacing Plungers

Remove Plunger Assembly

Remove piston screw, separate plunger from rod.

Install New Plunger

Install new o-ring and backup ring, press screw into plunger.

Replacing V-Packings

Extract Old V-Packings

Use extractor to remove retainers, v-packings, and head rings.

Install New V-Packings

Use insertion tool to install rings and packing into cylinder.

Reassemble Plungers and Manifold

Coat plungers with grease and remount manifold.

Troubleshooting Common Issues

Pulsation and Low Pressure

Addresses issues like valve problems, worn nozzles, and inlet restrictions.

Rough Pump Operation and Leakage

Covers rough running, low pressure, water, and oil leaks.

Noise and Packing Failure

Diagnoses knocking noises and premature packing wear.