© Feb 2021 ii TB18 Plus&20J Plus Maintenance Manual
Conducting a Pre-delivery Inspection . 5-1
Following a Maintenance Schedule . . . 5-2
Completing a Repair & Inspection
Report.................................5-2
Checklist A Procedures . . . . . . . . . . . . . . . 5-5
A-1 Inspect All Manuals. . . . . . . . . . . . . 5-5
A-2 Inspect All Decals . . . . . . . . . . . . . . 5-6
A-3 Inspect Damaged, Loose or
LostParts...........................5-6
A-4 Inspect Hydraulic Oil Level . . . . . 5-6
A-5 Inspect Hydraulic Leakage . . . . . 5-7
A-6 Inspect Fuel Level . . . . . . . . . . . . . . 5-7
A-7 Inspect Fuel Leakage . . . . . . . . . . 5-8
A-8 Inspect Engine Oil Level. . . . . . . . 5-8
A-9 Inspect Coolant Level（water-
cooled engine）....................5-9
A-10 Inspect Engine Belt . . . . . . . . . .5-10
A-11 Inspect Fuel Strainer （fuel-
water separator）..................5-10
A-12 Inspect Cooling Fan. . . . . . . . . . 5-11
A-13 Inspect Engine Intake
System.............................5-11
A-14 Functional Tests. . . . . . . . . . . . . .5-12
A-15 Perform Maintenance after
30 Days............................5-15
Checklist B Procedures . . . . . . . . . . . . . .5-15
B-1 Replace Hydraulic Oil Tank
Return Filter Element . . . . . . . . . . . . . .5-15
B-2 Inspect Rim, Tire and
Fasteners..........................5-16
B-3 Inspect Hydraulic Oil . . . . . .. . . .5-16
B-4 Inspect Cooling System . . . . . . .5-16
B-5 Replace Fuel Strainer （fuel-
water seperator）Element. . . . . . . . .5-16
B-6 Inspect Air filter of Hydraulic
Tank ...............................5-17
B-7 Replace High-Pressure Filter
Element............................5-18
B-8 Replace Air Filter Element of
Engine .............................5-18
B-9 Inspect Length and Angle
Sensors............................5-19
B-10 Inspect Engine Exhaust
System.............................5-20
B-11 Inspect Drive Reducer Oil
Level...............................5-20
B-12 Inspect Slewing Reducer Oil
Level...............................5-20
B-13 Inspect Slewing Bearing
Bolts ...............................5-21
B-14 Lubricate Slewing Bearing . . .5-22
B-15 Inspect Platform Rotate
Cylinder Fasteners . . . . . . . . . . . . . . . .5-22
B-16 Test Cylinder Drift . . . . . . . . . . . .5-23
B-17 Inspect Oscillate Cylinder
Exhausting and Counterbalance
Valve Locking . . . . . . . . . . . . . . . . . . . . . .5-23
B-18 Inspect Electrical Wiring . . . . .5-24
B-19 Inspect the battery . . . . . . . . . . .5-24
B-17 Test Oscillate Cylinder
Exhausting and Counterbalance
Valve Locking . . . . . . . . . . . . . . . . . . . . . .5-24
B-21 Test Drive Speed. . . . . . . . . . . . .5-25
B-22 Inspect Emergency Lowering 5-25
B-23 Inspect Tilt Protection . . . . . . . .5-26
Checklist C Procedures . . . . . . . . . . . . . .5-26
C-1 Replace Fuel Filter Element. . .5-26
C-2 Inspect Boom Extend/Retract
Cables and Pulleys . . . . . . . . . . . . . . . .5-27
C-3 Replace Engine Oil. . . . . . . . . . . .5-28
C-4 Replace Engine Oil Filter . . . . . .5-28
C-5 Replace Air filter of Hydraulic
Tank ...............................5-29
C-6 Inspect Weighing System . . . . .5-29
Checklist D Procedures . . . . . . . . . . . . . .5-30
D-1 Replace Drive Reducer Gear
Oil..................................5-30
