DV11
Operation and Maintenance
186
Maintenance of Major Components
Printed in Mar. 2005 PS-MMA0608-E1A
5.2.3. Diagnostics and troubleshooting
Complaints Possible causes Corrections
z Poor oil z Use suggested oil
z Oil seal or packing leaky z Replace
z Pistons or piston rings
worn
z Replace pistons and/or
piston rings
z Cylinder liner worn z Replace cylinder liner
z Piston rings sticking z Replace pistons and/or
piston rings
1. Oil consumption
excessive
z Valve guide oil seals or
valve guides, or valve
stem worn
z Replace
z Poor oil z Use suggested oil
z Relief valve sticking z Replace
z Restrictions in oil pump
strainer
z Clean strainer
z Oil pump gear worn z Replace
z Oil pump feed pipe
cracked
z Replace
z Oil pump defective z Correct or replace
z Oil pressure gauge
defective
z Correct or replace
Oil pressure too low
z Various bearings worn z Replace
z Restriction in oil filter z Replace filter element 2. Oil deteriorates
quickly
z Gases leaking z Replace piston rings and
cylinder liner
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