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SYMPTOM
Engine misses, operates
erratically, or operates
poorly at low speed
(continued).
Engine not developing full
power.
LeeBoy Model 695 Motor Grader
Table 5-3. Troubleshooting Chart (Cont.)
CAUSE
Incorrect valve clearance.
Basic engine malfunction. Leaking
head gasket, sticking or burnt valves,
valve clearance or valve timing
incorrect, or worn or broken piston
rings.
Fuel filter clogged.
Air filter elements clogged.
Water in fuel or wrong grade of fuel
used.
Exhaust system restriction.
Fast idle speed set too low.
Incorrect valve clearance.
Fuel line or injection pump line
restricted.
Park brake dragging.
Service brakes dragging.
Fuel transfer pump malfunctions.
Injection pump or nozzle(s)
malfunctions.
Internal hydraulic system leakage.
Turbocharger gasket leakage.
Basic engine malfunction. Leaking
head gasket, sticking or burnt valves,
valve clearance or valve timing
incorrect, or worn or broken piston
rings.
Maintenance
REMEDY
Adjust clearance.
Refer to Cummins engine manual.
Check for debris in fuel system. Replace
filter.
Clean or replace air filter elements.
Drain water from fuel tank sump or drain
and flush fuel tank and refill with correct
fuel. Replace fuel filter.
Check condition of muffler interior.
Check for bent, worn, or loose speed
control linkage. Repair as needed. Adjust
linkage and reset fast idle speed.
Adjust clearance.
Clear restriction with compressed air.
Replace line.
Adjust linkage. Check park brake disc for
warping or scoring. Check park brake
cable for binding. Overheating of park
brake disc indicates dragging. Repair or
replace park brake disc and/or park brake
cable as required.
Check brake linkage for damage. Check
brake valve for leakage. Check brake discs
for warping or scoring. Dragging brakes
could cause overheating of transmission/
hydraulics or engine.
Repair or replace fuel transfer pump.
See your authorized dealer.
Repair linkage. See your authorized dealer.
Repair or replace. See your authorized
dealer.
Refer to Cummins engine manual.
5 5
5-45
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