Annovi Reverberi SJV3G27D-EZ Istruzioni per l'uso e manuale delle parti - Pagina 13
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Operating Instructions and Parts Manual
Plunger Pumps
Troubleshooting
Symptom
Low Pressure (cont)
Pump Runs Extremely
Rough, Pressure Very
Low
Water Leakage from
Under Manifold.
Slight Leak
Oil Leaking in the Area
of Crankshaft
Excessive Play in the
End of the Crankshaft
Pulley
Water in Crankcase
Loud Knocking Noise
in Pump
Available from Allparts Equipment and Accessories - 1-877-475-5660 - www.allpartsinc.com
Possible Cause(s)
in pumped in cavitation.
Inadequate water
6. Worn inlet, discharge valve
blocked or dirty
Inlet restrictions and/or air leaks.
Stuck inlet or discharge valve
Worn packing or cracked
plunger
1. Worn crankshaft seal or
improperly installed oil seal
O-ring
2. Bad bearing
Worn main bearing from
excessive tension on drive belt
1. Humid air condensing into
water inside the crankcase
2. Worn packing and/or cracked
plunger
1. Cavitation or sucking air
2. Pulley loose on crankshaft
3. Broken or worn bearing
SJ & XJ Series Pumps
Corrective Action
Suction at inlet manifold must
be limited to lifting less
than 20 feet of water or
8.5 psi vacuum
6. Replace inlet and discharge
valve
Clean out foreign material.
Replace worn valves
Install new packing or plunger
1. Remove oil seal retainer
and replace damaged O-
ring and/or seals
2. Replace bearing
Replace crankcase bearing
and/or tension drive belt
1. Change oil intervals
2. Replace packing. Replace
plunger
1. Check water supply is
turned on
2. Check key and tighten set
screw
3. Replace bearing
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