11
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.
Troubleshooting
GP8155/GP8355/GP8160/GP8360/GP8165/GP8365
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 & 04188 &
Valve Assemblies
N/A
Valve Puller (p/n 07662)
52
04186
included w/pump
58
05087
Hexagon Socket Screw
132 (180)
12mm Allen Wrench
K5
07381
Hexagon Socket Screw
N/A
8mm Allen Wrench
Torque Specifications - GP8155/GP8160/GP8165
