© Oct 2020 5-32 AB18EJ&18HJ Maintenance Manual
MAINTENANCE PROCEDURES
3. Open the coolant tank cover.
4. Open the coolant tank drain valve to completely
drain the coolant into a suitable vessel.
5. After the coolant is fully drained, close the drain
valve.
6. Remove the coolant hose clamp, and remove the
coolant hoses from each connector.
7. Install the clamp onto the new coolant hose, and
attach the hose to the corresponding connector.
8. Secure the hose clamp in place.
9. Add new coolant into the tank until the coolant level
reaches the fill port of the tank.
10. Clean up the coolant spills in performing the
procedure.
11. Start the engine from the ground controller to
circulate the coolant in the cooling system.
12. Shut off the engine.
D-6 Replace Fuel Hoses (AB18HJ
only)
Regularly replacing the fuel hoses is vital to safe engine
operation and extending service life. Long-time use of
old, frayed or broken fuel hoses may pose dangers to
machine operation.
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.
NOTICE
Shut off the engine before inspection.
1. Open the right side cover of turntable.
2. Disconnect and plug the fuel hoses between fuel
tank and fuel filter.
3. Locate the following fuel hoses:
• Hoses between fuel tank and fuel filter.
• Hoses between fuel filter and fuel pump.
• Hoses between injector and fuel tank.
4. Remove the clamps from the hoses, and remove
the hoses.
5. Install the clamps onto the new hsoes, and attach
the hoses to the respective fittings.
6. Adjust the clamp to secure each hose.
7. Clean up the fuel spills during performing the
procedure.
8. Connect the fuel hoses between the fuel tank and
the fuel filter.
D-7 Inpsect Boom Wear Pads
Regularly inspecting the boom wear pads is vital to safe
machine operation. Friction pair develops between
each wear pad and the telescope boom surface.
Improperly shimmed wear pads or continued use of
extremely worn wear pads may result in component
damage and unsafe operating conditions.
Figure 5-28
1. Remove the both boom end covers or nylon brush.
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