Technical data

Aussie Pumps Bertolini Pumps Service Guidelines – July 2008
9
TROUBLESHOOTING
PROBLEM CAUSE REMEDY
Pulsation Faulty pulsation damper Check precharge, if low recharge or replace
Worn nozzle Replace nozzle
Belt slippage Tighten or replace
Air leak in inlet plumbing Disassemble, reseal and reassemble
Relief valve stuck, partially plugged or improperly
adjusted valve seat worn
Clean, adjust relief valve, check for worn and
dirty valve seats. Kit available
Inlet suction strainer clogged or improperly sized Clean. Check more frequently
Worn packing. Abrasives in pumped fluid or severe
cavitation. Inadequate water
Install proper filter. Suction at inlet manifold
must be limited to less than 6m lift or 8.5psi
Fouled or dirty inlet or discharge valves Clean inlet and discharge valve assemblies
Worn inlet, discharge valve blocked or dirty Replace worn valves, valve seats.
Leaky discharge hose Replace worn valves, valve seats and/or
discharge hose
Low pressure
Cracked pistons as a result of dry running Replace pistons
Restricted inlet or air entering the inlet plumbing Check inlet plumbing size. Check seals are air
tight
Pump runs extremely rough, pressure very low
Inlet restrictions and/or air leaks. Stuck inlet or
discharge valve
Replace worn cup or cups, clean out foreign
material, replace worn valves.
Water leakage from under manifold, slight
leakage
Worn packing Install new packing
Oil leak between crankcase and pumping
section
Worn crankcase piston rod seals, O-rings on
plunger retainer worn
Replace crankcase piston rod seals. Replace o-
rings.
Worn crankshaft seal or improperly installed oil
seal o-ring
Remove oil seal retainer and replace damaged o-
ring and/or seals
Faulty bearing Replace bearing
Oil leaking in the area of crankshaft
Travel plug in use on pump Replace with breather plug
Excessive play in the end of the crankshaft
pulley
Worn main bearing from excessive tension on drive
belt
Replace crankcase bearing and/or tension drive
belt
Humid air condensing into water inside the
crankcase
Change oil more frequently. Use high grade
automotive 30 weight nondetergent oil
Water in crankcase
Worn packing and/or piston rod sleeve. O-rings on
plunger retainer worn
Replace packing. Replace o-rings
Oil leaking from underside of crankcase Worn crankcase piston rod seals Replace seals
Oil leaking at rear portion of the crankcase Damaged crankcase, rear cover o-ring, drain plug
o-ring or sight glass o-ring
Replace cover o-ring, drain plug o-ring, or sight
glass o-ring
Pulley loose on crankshaft Check key and tighten set screw
Loud knocking noise in pump
Broken or worn bearing Replace bearing
Scored, damaged or worn plunger Replace plungers
Overpressure to inlet manifold Reduce inlet pressure
Abrasive material in fluid being pumped Install proper filtration on pump inlet plumbing
Excessive pressure and/or temperature of fluid
being pumped
Check pressures and fluid inlet temperature,
ensure they are within specified range
Over pressure of pump Reduce pressure
Frequent or premature failure of the packing
Running pump dry Do not run pump without water
A
ussie Pumps Bertolini Pumps Service Guidelines – July 2011