© Feb. 2023
176 TB20J Plus Maintenance Manual
APPENDIX
Major Modification and Repair Record
Note:
1. A major modification/repair is a modification/repair made to the entire machine or its parts that affects the stabil-
ity, strength or performance of the machine.
2. A major modification/repair to the machine should be documented with the form below. Keep the form properly
until the machine is taken out of service, or as requested by the machine owner/company.
3. The machine must be inspected and verified after major modifications/repairs, with the inspection items includ-
ing but not limited to all items in the Inspection and Preventative Maintenance Schedule. After all the inspection
and verification results are good, the machine can be put back into service.
13.2 INSPECTION AND PREVEN-
TATIVE MAINTENANCE
SCHEDULE
Perform inspection and preventive maintenance for the
items in the table below at prescribed intervals. The in-
tervals of inspection and maintenance are calculated
based on the months elapsed since the machine has
been put into service or the “cumulative working time”
on the ground controller display (whichever comes first).
The inspection cycle is based on the use of machine
under normal working conditions, and the cycle should
be shortened accordingly if the machine is used in harsh
working conditions.
Table 13-1 Inspection and Preventative Maintenance Schedule
Items
Intervals
Before each
delivery
1
or
quarterly
2
Semiannually
3
Annually
4
Chassis assembly
Chassis 2 2 2
Tire
1, 2 1, 2 1, 2
Drive hub
1, 2
1，2，
1, 2
Tire fastener 1
50
1
50
1
50
Drive motor
1, 6 1, 6 1, 6
Travel reducer
1, 2, 6 1, 2, 6 1, 2, 6, 11
Steering component
1, 2 1, 2 1, 2
Outrigger, telescopic shaft
1, 2, 3 1, 2, 3 1, 2, 3
Bearing
1, 2, 5, 12 1, 2, 5, 12 1, 2, 5, 12
Turntable assembly
Turntable 2 2 2
Slewing bearing
1
50
，2，6，12 1
50
，2，6，12 1
50
，2，6，8，12
Slewing reducer
1, 2, 6 1, 2, 6 1, 2, 6, 11
To Next Page
