MAINTENANCE PROCEDURES
TB18 Plus&20J Plus Maintenance Manual 5-31 © Apr 2022
Figure 5-35 Cummins QFS2.8t3NA60 fuel
filter
Figure 5-36 WEICHAI WP3.2 fuel filter
2. Disconnect and plug the hose between fuel tank
and fuel filter.
3. Remove the fuel filter element.
4. Clean the inside of filter head.
5. Add clean fuel to the new filter element, and
lubricate the seal ring with the clean fuel and install
it to the filter head.
6. Clean up the spilled fuel in performing the
procedure.
C-2 Inspect Boom Extend/Retract
Cables and Pulleys
Boom extend/retract cables are responsible for the
extension and retraction of boom.The boom extension
and retraction should operate smoothly and be free of
hesitation, jerking and unsual noise.
NOTICE
Shut off the engine before inspection.
1. Remove the boom end cover.
2. Inspect for the following：
• In case of frayed, broken wire stands, corrosion,
kinks in the cables, and broken or damaged
pulleys, replace the cables and pulleys.
• In case of foreign materials on the cables, clean
the cables.
• If the cables are located outside of the pulleys,
adjust the cables to the appropriate place.
• Manually guide the cables and inspect the cable
tension, a properly tensioned cable should be
impossible or hard to be moved.
3. If no deficiencies are discovered after the
inspection, intall back the boom end cover.
4. Start the engine from the ground controller.
5. Extend the boom approximately 0.6m.
6. Retract the boom, and visually inspect the the
movenent of the 2nd and 3rd boom sections.
7. The retraction displacement of the 2nd boom
section should not be more than 1/2 that of the 3rd
boom section.
NOTICE
The cables and pulleys should be replaced together,
i.e., if the cable is replaced, the matching pulley
should also be replaced.
C-3 Replace Engine Oil
NOTICE
The engine oil filter must also be replaced after
replacing the engine oil. Replace the oil with engine
started to circulate the oil more smoothly and avoid
contamination.
1. Turn the Ground/Platform select switch to Ground.
2. Pull out the emergency stop button on the ground
controller to ON.
3. Turn the key switch on the ground controller to ON.
4. Move the engine start switch to idle for 2 minutes.
5. Shut off the engine.
6. Open the drain valve to drain the engine oil.
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