WWW.AIRLESSCO.COM TEL: 805-523-0211 FAX: 805-523-1063
Email: [email protected]
WWW.AIRLESSCO.COM TEL: 805-523-0211 FAX: 805-523-1063
Email: [email protected]
TROUBLE SHOOTING
PROBLEM
CAUSE
REMEDY
Low Pressure
• Worn nozzle
• Air leak in inlet plumbing
• Relief valve stuck, partially
plugged or improperly adjusted
valve seat worn
• Inlet suction strainer clogged or
improperly sized
• Worn packing; Abrasives in
pumped fluid or severe cavitation;
Inadequate water
• Fouled or dirty inlet or discharge
valves. Leaky discharge hose
• Disassemble, reseal and reassemble
• Clean, adjust relief valve; check for
worn and dirty valve seats
• Clean, use adequate size; check more
frequently
• Install proper filter, suction at manifold
must be limited to lifting less than 20
feet of water or -8.5 PSI vacuum.
• Clean inlet and discharge valve assemblies
• Replace worn valves, valve seats and/
or discharge hose
Pump runs extremely
rough, pressure very
low
• Restricted inlet or air entering the
inlet plumbing
• Inlet restrictions and/or air leaks;
Stuck inlet or discharge valve
• Proper size inlet plumbing; check for air
tight seal.
• Replace worn cup or cups; clean out
foreign material, replace worn valve
Water leakage from
under manifold; Slight
leakage
• Worn packing
• Install new packing
Oil leak between
crankcase and
pumping section
• Replace crankcase piston rod seals;
Replace O-rings
Excessive play in the
end of the crankshaft
pulley
• Worn crankcase, piston rod
seals O-ring on plunger
Oil leaking in the area
of crankshaft
• Worn crankshaft seal or improperly
installed oil seal O-ring
• Bad bearing
• Remove oil seal and replace damaged
O-ring and/ or seals
• Replace bearing
• Worn main bearing form
excessive tension on drive belt
• Replace crankcase bearing and/or tension
drive belt
Water in crankcase
• May be caused by humid air
condensing into water inside the
crankcase
• Worn packing and/or piston rod
sleeve, & O-rings on plunger retainer
• Change oil intervals; use any high grade
automotive 30 weight non detergent oil
• Replace packing, replace O-rings
Oil leaking from un-
derside of crankcase
• Worn crankcase piston rod seals
• Replace seals
• Damaged crankcase, rear cover
O-ring, drain plug O-ring or slight
glass O-ring
• Replace specific O-ring
Oil leaking at the rear
portion of the
crankcase
Loud knocking noise
in pump
Frequent or premature
failure of the packing
• Pulley loose on crankshaft
• Broken or worn bearing
• Check key and tighten set screw
• Replace bearing
• Scored, damaged or worn plunger
• Overpressure to inlet manifold
• Abrasive material in the fluid being
pumped
• Excessive pressure and/or
temperature of fluid being pumped
• Over pressure of pumps
• Running pump dry
• Replace plungers
• Reduce inlet pressure
• Install proper filtration on pump inlet
plumbing
• Check pressure and fluid inlet temperature;
be sure they are with in specified range.
• Reduce pressure
• Do not run pump without water
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