REPAIR PROCEDURES
TB18 Plus&20J Plus Maintenance Manual 6-13 © Apr 2022
6. Hand turn the inner ring of the slewing bearing,
ensure it moves smoothly.
7. Detach the lifting device from the slewing bearing.
8. Rotate the inner ring of the slewing bearing until the
soft strap area on the inner ring and that on the
outer ring are symetrically arranged around the
center of the slewing bearing.
9. Using a lifting device, lift the turntable to the
mounting surface of the slewing bearing.
10. Using the special washer for the high-strength bolt,
mate the washer surface with the mounting surface,
apply threadlocker Loctite 272 to the bolt, and intall
the bolts one by one.
11. Refer toFig 6-17 , page 6-12，and tighten the
retaining bolts in the sequence as indicated.
12. Refer to Table 6-5 , page 6-12, and tighten the
bolts per the recommended torques and sequence.
Engine
Please read the engine manufacturer’s manuals for the
engine operation and maintenance instructions. For the
convenience of referencing related information, this
manual introduces part of engine maintenance items,
please see the following sections for details：
• A-6 Inspect Fuel Level
• A-7 Inspect Fuel Leakage
• A-8 Inspect Engine Oil Level
• A-9 Inspect Coolant Level (water-cooled engine)
• A-10 Inspect Engine Belt
• A-11 Inspect Fuel Strainer (fuel-water separator)
• A-12 Inspect Cooling Fan
• A-13 Inspect Engine Intake System
• B-4 Inspect Cooling Syste
• B-5 Replace Fuel Strainer (fuel-water seperator)
Element
• B-8 Replace Air Filter Element of Engine
• B-10 Inspect Engine Exhaust System
• C-1 Replace Fuel Filter Element
• C-3 Replace Engine Oil
• C-4 Replace Engine Oil Filter
• D-5 Replace Coolant and Coolant Hoses (water-
cooled engine)
• D-6 Replace Fuel Hoses
Main engine fault codes and causes：
Table 6-6 Cummins QSF2.8 fault codes
FAULT
CODE
SPN FMI DESCRIPTION CAUSE
111 629 12
Engine control model fails serverly
Smart control device or component
damaged
131 91 3
Electrical circuit #1 of sensor at the
accelerator padal or control handle
High-voltage short circuit
132 91 4
Electrical circuit #1 of sensor at the
accelerator padal or control handle
Low-voltage short circuit
144 110 3
Electrical circuit #1 of engine coolant
temperature sensor
High-voltage short circuit
145 110 4
Electrical circuit #1 of engine coolant
temperature sensor
Low-voltage short circuit
146 110 16
Engine coolant temperature
Data valid but higher than normal
(medium-level severity)
147 91 1
Electrical circuit #1 frequency of sensor
at the accelerator padal or control handle
Data valid but lower than normal
(highest-level severity)
148 91 0
Electrical circuit #1 frequency of sensor
at the accelerator padal or control handle
Data valid but higher than normal
(highest-level severity)
151 110 0
Engine coolant temperature
Data valid but higher than normal
(highest-level severity)
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