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Troubleshooting
Engine looses power. • Engine load is excessive. • Reduce ground speed.
• Reduce speed of trencher.
• Air cleaner is dirty. • Clean air filter housing and
replace the filter elements.
• Engine oil level in crankcase is
low.
• Add the appropriate engine
oil to crankcase. See engine
manual for oil specifications.
• Cooling fins and air passages
under engine blower housing
are plugged.
• Remove obstruction from
cooling fins and air passages.
• Dirty or contaminated fuel filter. • Replace fuel filter.
• Dirt, water, or stale fuel is in fuel
system.
• Drain fuel in tank into an
appropriate storage container
and dispose of bad fuel
properly.
• Refill fuel tank with fresh,
clean fuel.
• Replace fuel filter.
Engine overheats. • Engine load is excessive. • Reduce ground speed.
• Reduce speed of trencher.
• Engine oil level in crankcase
is low.
• Add the appropriate engine
oil to crankcase. See engine
manual for oil specifications.
• Cooling fins and air passages
under engine blower housing
are plugged.
• Remove obstruction from
cooling fins and air passages.
Abnormal engine vibration. • Engine mounting bolts are loose. • Tighten engine mounting bolts.
With the engine turned
off, the boom creeps
downward (less than 3"
per hour is normal for this
machine).
• Valve spool leakage. • Contact Service Dealer.
• Cylinder seals are leaking. • Replace cylinder seals.
With the engine turned
off, boom drops
downward quickly and
then stops.
• Cylinder seals are leaking. • Replace cylinder seals.
Problem Possible Causes Corrective Action