Delco Cobalt Series Instruction Manual download pdf (Page 13)

31launaM s’renwO 0035 Cobalt

DIAGNOSIS AND MAINTENANCE

PROBLEM PROBABLE CAUSE SOLUTION

Low Pressure .ezis reporp fo elzzon ecalpeRelzzon nroW

.tleb tcerroc esu ;ecalper ro nethgiT.egappils tleB

.epat ro diuqil EFTP esU.gnibmulp telni ni kael riA

Pressure gauge inoperative or not Check pressure with new guage and replace as needed.

registering accurately.

Relief valve stuck partially plugged or Clean and reset relief valve to system pressure

.noitanimatnoc rof knat ylppus kcehC .ssap-yb tcerroc dna.detsujda ylreporpmi

.tik evlav htiw ecalper ro naelC.sevlav ro taes nroW

noitcennoc pmup telni rof ezis etauqeda esUro deggolc reniarts noitcus telnI

.yltneuqerf naelC .depmup gnieb diulf dna.dezis ylrporpmi

Worn seals. Abrasives in pumped Install and maintain proper filter, check line

fluid, severe cavitation; inadequate size and flow available to pump. Install a C.A.T.

water supply, stressful inlet conditions.

Fouled or dirty inlet or discharge valves. Clean inlet and discharge valve assemblies.

.tik evlav htiw ecalpeR.sevlav egrahcsid ro telni nroW

.snoitcennoc kcehC .esoh ecalpeR.esoh egrahcsid ykaeL

Pulsation, pump runs metsys fo )%05-03 eb dluohs( egrahcerp kcehCrenepmaD noitasluP ytluaF

extremely rough, pressure low .dedeen sa ecalper ro erusserp.

Restricted inlet or air entering inlet plumbing. Check filters and clean as needed. Check fittings and use

PTFE liquid or tape for air tight connection.

.noitanimatnoc rof knat ylppus kcehC .evlav ecalper ro naelCevlav egrahcsid ro telni kcutS

Water leakage from under metsys dna erusserp telni kcehc ,tik laes htiw ecalpeR.slaes nroW

the manifold temperature, use Thermo Valve in by- inlet pressure regulator

in inlet line.

Oil leak between crankcase slaes esacknarc ecalpeR.slaes esacknarc nroW

and pumping section *Slight leakage.

Oil leaking in area of crankshaft .slaes degamad ecalpeRlaes tfahsknarc nroW

.gniraeb ecalpeR. gniraeb daB

Excessive play in the end of .gniraeb ecalpeR. gniraeb nroW

the crankshaft.

Water in crankcase gnisu slevretni sruoh 005 ro shtnom 3 yreve lio egnahC.retaw otni gnisnednoc ria dimuH

,lio ciluardyh tnegreted-noN 03W01 edarg muimerp esacknarc eht fo edisni

(other approved oil every month or 200 hours.)

.erudecorp noitallatsni reporp wolloF .slaes ecalpeRro slaes esacknarc fo gnikaeL

.gnicivres esacknarc rof reilppus spmuP taC tcatnoC.drawkcab dellatsni slaes

Oil leaking at the rear portion Damaged or improperly installed oil guage, Replace oil gauge, crankcase cover or drain plug o-ring.

of the crankcase crankcase cover, or drain plug o-ring. Thread in oil guage and drain plug hand tight to avoid

extruding o-ring.

Loud knocking noise in pump |.wercs nethgit dna yek kcehC.tfahsknarc no esool yelluP

Worn bearing, connecting rod or crankshaft. Consult Cat Pumps supplier for crankcase servicing.

.T.A.C llatsnI.snoitidnoc telni lufssertS

Frequent or premature failure sregnulp ecalpeRsregnulp derocs ro dekcarC

of the packing Abrasive material in the fluid being pumped Install proper filtration on pump inlet plumbing.

Check supply tank for contamination.

Excessive pressure and/or temperature Check pressure and fluid inlet temperature; be sure they are

.egnar deificeps nihtiw.depmup gnieb diulf fo

Over pressure of inlet or discharge Reduce pressure per specifications.

!RETAW TUOHTIW PMUP NUR TON OD.yrd pmup gninnuR

Strong surging at the inlet Foreign particles in the inlet or discharge Check for smooth surfaces on inlet and discharge valve seats.

and low pressure at the discharge side. valve or worn inlet or discharge valves. Replace with kit if pitted or worn. Check supply tank for

contamination, Install and regularly clean filter. Do not pump

abrasive fluids.

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Delco Cobalt Series Instruction Manual Page 13

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