Pumpsystemmalfunction

PUMPSYSTEMMALFUNCTION

MALFUNCTION	CAUSE	REMEDY
The Pressure and/or	Worn packing seals	Replace packing seals
theDeliveryDrops	Brokenvalvespring	Replacespring
	Beltslippage	Tighten or Replace belt
	Worn or Damaged nozzle	Replacenozzle
	Fouleddischargevalve	Cleanvalveassembly
	Fouledinletstrainer	Cleanstrainer
	Worn or Damaged hose	Repair/Replacehose
	Worn or Plugged relief valve on pump	Clean,Reset,andReplacewornparts
	Cavitation	Check suction lines on inlet of
		pumpforrestrictions
	Unloader	Check for proper operation

Water in crankcase	Highhumidity	Reduceoilchangeinterval
	Worn seals	Replaceseals

Noisy Operation Wornbearings

Cavitation

Replacebearings,Refillcrankcase oilwithrecommendedlubricant Checkinletlinesforrestrictions and/orproper sizing

Rough/Pulsating Wornpacking

Operationwith Inletrestriction

Pressure Drop

Accumulatorpressure

Unloader

Cavitation

Replacepacking

Check system for stoppage, air leaks,correctlysizedinletplumbing to pump

Recharge/Replaceaccumulator Check for proper operation Checkinletlinesforrestrictions and/or proper size

Pressure Drop at	Restricteddischargeplumbing	Re-sizedischargeplumbingto
Gun		flow rate of pump

ExcessiveLeakage	Wornplungers	Replaceplungers
	Wornpacking/seals	Adjust or Replace packing seals
	Excessivevacuum	Reducesuctionvacuum
	Crackedplungers	Replaceplungers
	Inlet pressure too high	Reduceinletpressure

HighCrankcase	Wrong Grade of oil	Giant oil is recommended
Temperature	Improper amount of oil in crankcase	Adjust oil level to proper amount