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Plunger Packing Kit #09616
Item Part # Description Qty.
38A 13286 O-Ring 6
39A 05066 O-Ring 6
40 07723 Seal Ring 3
42 05277 V-Sleeve 9
Oil Seal Kit - #09584
Item Part # Description Qty.
32 05058 Radial Shaft Seal 3
33A 05056 O-Ring 3
Inlet Valve Kit - #09587
Item Part # Description Qty.
51B 05078 Inlet Valve Seat 1
51C 05079 Valve Plate 1
51D 07658 O-Ring 1
51E 05080 Valve Spring 1
51F 05081 Valve Spring Guide 1
56A 06258 O-Ring 3
Discharge Valve Kit - #09588
Item Part # Description Qty.
52B 05084 Discharge Valve Seat 1
52C 05079 Valve Plate 1
52D/56A 06258 O-Ring 2
52E 05080 Valve Spring 1
52F 05081 Valve Spring Guide 1
GP8155-R PUMP REPAIR KITS
GP8155-R TOOL LIST AND TORQUE SPECIFICATIONS
Item Part # Description Torque Ft-Lbs (NM) Tool Needed
17 05038 Hexagon Socket Screw 64 (87) 10mm Allen Wrench
24 05047 Connecting Rod Hex. Hd. Socket Screw 37 (50) 8mm Allen Wrench
33B 05054 Clip Ring N/A Industrial Snap Ring Pliers
36C 05062 Tension Screw 30 (40) 16mm Socket
49A 05073 Hexagon Nut (Manifold) 265 (360) 30mm Socket
51-52 05076-05082 Valve Assemblies N/A Valve Puller (p/n 07662) Included
w/pump
58 05087 Hexagon Socket Screw 132 (180) 12mm Allen Wrench
K5 07381 Hexagon Socket Screw N/A 8mm Allen Wrench
GP8155-R TROUBLESHOOTING
Problem Cause Solution
Pressure Drops, water leaks V-sleeves leak Replace V-sleeves, check surface of
plunger
Pressure drops, pump gets loud Discharge or suction valve leaks Replace valve(s)
Steam formation (Cavitation) Reduce suction height, reduce flow
resistance in inlet line, clean inlet
filter, lower water temperature.
Irregular pressure Worn Valves Examine valves
O-ring on valves or inlet valve
adapter leaks Examine O-rings, check valve
casing for unevenness on the
sealing surfaces
Oil leaks at visible part of plunger Gear sealing is leaking Examine seals and running surface
of plunger
Dirty, milk-colored or frothy oil Water has mixed with oil Replace oil immediately, find & fix
the cause
Oil leakage on the crankshaft Shaft seal ring leaks Check seal and shaft
Noise increases without the loss Worn bearing Dismantle gear, examine all parts,
replace worn parts, check oil level. If
service life was too short, check for
excess strain or whether lubrication
intervals were too long. Only
specified lubricants are to be used.
GP8155-R PUMP REPAIR INSTRUCTIONS
6) Remove tension screw (36C) and take
seal sleeve (39) together with all mounted
parts out of the drive. Pull plunger pipe (36B)
out of the seal assembly and check for any
damage. Carefully, remove seal rings (40) and
sleeves (42) with a screwdriver.
4) Remove valve assembly (52) from discharge valve adapter (56) by gently twisting apart. The spring tension
cap (51A, 52A) is screwed together with the valve seat (51B or 52B). Screw off spring tension cap. Takeout
springs (51E, 52E) and valve plate (51C, 52C). Check sealing surfaces and O-rings (51D, 52D). Replace worn
parts. Coat threads of valve seat with silicon grease or molycote anti-seize Cu-7439 when reassembling.
Before refitting the valves, clean the sealing surfaces in the casing and check for any damage. Coat o-rings
(51D, 52D & 56A) with silicone grease to help with re-assembly. Replace valve assembly (51) and pressure
spring (57). Assemble valve assembly (52) to discharge valve adapter (56) by tapping together lightly with
rubber mallet. While replacing the valve assemblies use a rubber mallet to tap the top of the valve puller lightly.
This insures proper seating. Replace pressure spring (57A) and the discharge casing (50B). Tighten caps (58)
at 133 Ft-lbs; check torque tension after 8-10 operating hours.
5) Remove hexagon nuts (49A) and valve
casing together with seal case (38) from
crankcase (1). If necessary, carefully tap the
valve casing (50) past the centering stud (50A)
using a rubber hammer.
IMPORTANT! If necessary, support the valve
casing by resting it on wooden blocks or by
using a pulley.
Valve Inspection and Repair
1) Remove socket head cap
screws (58)
2) Lift discharge casing
(50B) up and away.
3) Take out pressure springs
(57A). Pull out assembled
valves (51 & 52) with valve puller.
To Check Seals and Plunger Pipe
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