John Deere rhino pd54 - Manual (Page 24)

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3. OPERATION
For satisfactory operation, the following oil
conditions apply:
1. Accurate level readings can be checked
only when the fluid is cold.
2. If the natural color of the fluid has become black
or milky, it is possible that an overheating or
water contaminant problem exists.
3. Do not mix hydraulic fluids. Mobil 424 is
recommended for the hydraulic system.
CAUTION: After a new unit has run 5 hours, the
oil filter should be changed. This is to rid the
system of any trapped contamination from the wear-
in of the parts. Refer to Maintenance for hydraulic
filter change.
3.7 ENGINE COOLANT
CHECK COOLING SYSTEM CAREFULLY.
EXPLOSIVE RELEASE OF FLUIDS FROM
PRESSURIZED COOLING SYSTEM CAN
CAUSE SERIOUS BURNS.
To check coolant level:
1. Shut off engine, allow to cool.
2. Only remove filler cap when cool enough to
touch with bare hands. Slowly loosen cap to
first stop to relieve pressure before removing
completely.
3. Remove cap, coolant level should just touch the
bottom of radiator filler neck. If coolant is
required, see “Adding Coolant” in the
Maintenance section of this manual.
IMPORTANT: Do not overfill radiator. Refer to
“Coolant Maintenance” if additional coolant is
required. Never pour cold liquid into a hot
engine, as it may crack cylinder head or block.
DO NOT operate engine without coolant for even
a few minutes. If coolant leaks or abnormal
temperature is detected, contact a service
technician immediately.
NOTE:It is normal for a small amount of leakage to
occur as the engine cools down and parts contract.
Excessive coolant leakage may indicate the need to
replace the water pump seal. Contact your engine
distributor or servicing dealer for repairs.
3.8 VISUAL INSPECTION
Make a thorough inspection of the engine compartment
daily. Look for oil or coolant leaks, worn fan belt,
loose connections and trash build-up. Remove trash
build-up and have repairs made as needed if leaks are
found.
NOTE:Wipe all fittings, caps, and plugs before
performing any maintenance to reduce the chance of
system contamination.
• Air intake system hoses and connections for
cracks and loose clamps.
• Fan belt for cracks, breaks, or other damage.
• Water pump for coolant leaks.
3.9 AIR CLEANER
IMPORTANT: The air intake system must not leak.
Any leak, no matter how small, may result in engine
failure due to abrasive dirt and dust entering the
intake system.
1. Inspect all intake hoses (piping) for cracks.
2. Check clamps on piping which connect the air
cleaner and engine.
3. Squeeze dust unloader valve (A) on air cleaner
assembly to remove dust deposits. If clogged,
remove and clean the dust unloader valve. Replace
if damaged.
IMPORTANT: Do not operate engine without the
dust unloader valve.
WARNING