MAINTENANCE PROCEDURES
AB18EJ&18HJ Maintenance Manual 5-17 © Oct 2020
NOTICE
Tighten the lug nuts prior to the first use or after each
tire removal, inspect and retorque every 3 months or
150 hours of operation.
B-3 Inspect Hydraulic Oil
Inspecting and replacing the hydraulic oil is vital to
proper machine operation and extending service life.
The machine may be unable to operate properly if the
hydraulic oil becomes dirty, and the hydraulic parts may
be damaged if using contaminated oil. Replace the
hydraulic oil often, especially when the service
environment is very dirty.
Note:Due to wear and tear on the mesh components,
metal particles may appear in the hydraulic fluid or filter
of the new machine.
BURN HAZARD
Before maintaining the hydraulic sys-
tem, allow the hydraulic fluid to cool
to room temperature.
Replace the hydraulic oil if any of the following
conditions exist：
• The hydraulic oil is milky white and cloudy.
• The hydraulic oil is blackened.
• Obtain a sample of the hydraulic oil and inspect it in
sunlight. Rub the oil between two fingers to
determine if it contains metal particles.
• The hydraulic oil has an abnormal smell.
See D-3 Replace Hydraulic Oil, page 5-30for the
replacement steps.
B-4 Inspect Cooling System (AB18HJ
only)
Inspecting cooling system on a regular basis is vital to
proper operation of engine and extending service life.
BURN HAZARD
Be cautious of the heated parts of
engine. Bodily contact with them may
result in severe burn.
NOTICE
Shut off the engine before inspection.
• Inspect the cooling system for leakage or loose
connections.
• Inspect all hoses of radiator for crack, abrasion, free
of getting flattened, and clamps secured.
• Ensure the cooling fins of radiator are not blocked
by debris.
B-5 Replace Fuel filter (AB18HJ only)
Replacing fuel filter on a regular basis is vital to proper
operation of engine and extending service life. A dirty or
blocked filter may cause the machine to work
improperly. and continued operation may result in
component damage. The fuel fiter should be replaced
at increased frequency if the machine uses fuel of
inferior quality or operates in humid environment.
NOTICE
Shut off the engine before inspection.
EXPLOSION AND FIRE HAZARD
• Diesel is an inflammable material.
This procedure must be performed
outdoors in well-vented area and far
away from flames.
• Ensure that a conforming fire
extinguisher is readily accessible
when performing this inspection
procedure.
1. Open the right side cover of turntable.
2. Locate the fuel filter.
3. Disconnect the fuel flow from the fuel tank to the
fuel filter.
4. Loosen the valve plug over the fuel filter.
5. Place a suitable vessel under the fuel filter.
6. Remove the drain plug at the bottom to drain the
water and the remaining fuel into the vessel.
7. Remove the fuel filter, replace with a new one and
install.
8. Tighten the plug.
9. Clean up the fuel spills.
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