Instruction Manual

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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.

Summary of content (4 pages)

PAGE 1
TRIPLEX TRIPLEX 47 Series GENERAL PUMPA member of the Interpump Group SERVICING INSTRUCTIONS Triplex Plunger 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.
PAGE 2
47 Series Servicing Instructions GENERAL PUMPA member of the Interpump Group REPLACING PLUNGERS (Figure 3, 5 & 6) 1. Remove stainless steel plunger from piston rod. piston screw and 2. If slinger washer comes off with plunger, be certain this is replaced before new plunger is installed. 3. Separate piston screw from plunger. 4. Install new o-ring and teflon backup ring on piston screw. NOTE: A film of grease on the outside of the o-rings insures a better installation. 3 5.
PAGE 3
47 Series Servicing Instructions GENERAL PUMPA member of the Interpump Group REPLACING V-PACKINGS (Figure 7, 8, 9 & 10)) 1. Remove manifold from crankcase. 2. Insert proper extractor collet through main seal retainer. Tighten collet and extract retainers, v-packings and head rings. 3. Place proper insertion tool in cylinder and install front head ring, v-packing and long life ring and press firmly into cylinder until they will go no further using proper insertion tool. 4.
PAGE 4
PROBLEM Pulsation TROUBLESHOOTING CAUSE REMEDY Faulty pulsation damper. Check precharge; if low, rechargeit or install a new one. Valve stuck open. Worn nozzle. Belt slippage. Air leak in inlet plumbing. Low pressure Relief valve stuck; partially plugged or improperly adjusted valve seat worn. Worn packing. Abrasives in pumped fluid or severe cavitation. Inadequate water. Worn inlet, discharge valve blocked or dirty. Water leakage from under manifold. Slight leakage.