Giant GP8135A, Operating Instructions/ Repair And Service Manual

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8
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.
Pump Repair Kits - GP8135 and GP8140
Plunger Packing Kit - GP8135 - # 09707
Item Part # Description Qty.
38A 05408 O-Ring 6
39A 05617 O-Ring 3
40 05744 Sleeve 3
40A 05745 O-Ring 3
41A 05747 Guide Ring 3
42 05748 Rope Packing 6
44 05751 Support Ring 6
Plunger Packing Kit - GP8140 - # 09708
Item Part # Description Qty.
38A 05818 O-Ring 6
39A 05617 O-Ring 3
40 05820 Sleeve 3
40A 05821 O-Ring 3
41A 05824 Guide Ring 3
42 05825 Rope Packing 3
44 05827 Support Ring 3
Inlet Valve Kit - #09709
Item Part # Description Qty.
51 05837 Inlet Valve Assembly 3
56A 05408 O-Ring 3
Discharge Valve Kit - #09710
Item Part # Description Qty.
52 05839 Discharge Valve
Assembly 1
Oil Seal Kit - #09584
Item Part # Description Qty.
32 05058 Radial Shaft Seal 3
33A 05056 O-Ring 3
Tool List and Torque Specifications - GP8135/GP8140
Item Part # Description Torque - Ft-lbs (NM) Tool Needed
17 05038 Hexagon socket screw 64 (87) 10 mm allen wrench
24 05047 Connecting rod hexagon socket screw 37 (50) 8 mm allen wrench
33B 05054 Clip ring n/a Industrial snap ring pliers
36 05743/05816 Tension screw, plunger assemlby 33 (45) 16 mm socket
49A 05073 Hexagon nut, manifold 265 (360) 30 mm socket
51/52 05837/05839 Valve Assemblies n/a Valve Puller - p/n 07662
58 05753 Hexagon socket screw 132 (180) 12 mm allen wrench
K5 22706 Hexagon socket screw n/a 8 mm allen wrench