Mertz Boxer 999-935, Operator'S Manual

Page: 79 / 84

5-3
Troubleshooting
*Tested with warm oil and no more than 530 lbs (240 Kg) in the bucket. Measure the
downward drop at the attachment lock pins on the back of the mount plate.
• Dirty or contaminated fuel filter. • Replace fuel filter.
• Dirt, water, or stale fuel is in fuel
system.
• Drain fuel in tanks into an
appropriate storage container
and dispose of bad fuel
properly.
• Refill fuel tanks with fresh,
clean fuel.
• Replace fuel filter.
Engine overheats. • Engine load is excessive. • Reduce ground speed.
• Reduce speed of attachment.
• 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.
• Cooling system low on coolant • Check and refill coolant to
levels and with the type of
coolant indicated in the
engine manual.
• Dirty or plugged radiator • Clean the radiator.
Abnormal engine vibration. • Engine mounting bolts are loose. • Tighten engine mounting bolts.
With the machines
engine turned off, the
boom creeps downward
more than 3" per hour
(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 machines
engine turned off, boom
drops downward quickly
and then stops. • Cylinder seals are leaking. • Replace cylinder seals.
The machine does not
travel in either forward or
reverse directions. • Engine is not running at full
speed.
• Advance throttle to full engine
speed.
• Hydraulic fluid is cold. • Fully warm hydraulic fluid.
• Hydraulic fluid level is low. • Check and fill the hydraulic
fluid tank with the appropriate
hydraulic fluid.
• Fuel tanks are empty and
engine stops.
• Fill fuel tanks with fuel.
• If all above has been checked. • Contact authorized service
dealer.
Problem Possible Causes Corrective Action