
© Mar 2022 ii TB24E Plus&26EJ Plus&26E Plus&28EJ Plus Maintenance Manual
Application of Insulating Silicone
Grease to Electrical Connections . . . . . 4-6
5 Maintenance Procedures ...... 5-1
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 . . . . . . . . . . . . . . 5-5
A-3 Inspect Damaged, Loose or
LostParts...........................5-5
A-4 Inspect Hydraulic Oil Level . . . . . 5-5
A-5 Inspect Hydraulic Leakage . . . . . 5-6
A-6 Functional Tests . . . . . . . . . . . . . . . . 5-6
A-7 Perform Maintenance after 30
Days...............................5-10
A-8 Exhaust Oscillate Cylinder . . . .5-10
Checklist B Procedures . . . . . . . . . . . . . .5-10
B-1 Replace Hydraulic Oil Tank
Return Filter Element . . . . . . . . . . . . . .5-10
B-2 Inspect Rim, Tire and
Fasteners..........................5-11
B-3 Inspect Hydraulic Oil . . . . . . . . . . 5-11
B-4 Inspect Electrical Wiring . . . . . . . 5-11
B-5 Inspect Emergency Lowering .5-12
B-6 Inspect Air filter of Hydraulic
Tank ...............................5-12
B-7 Replace High-Pressure Filter
Element............................5-13
B-8 Test Drive Speed . . . . . . . . . . . . . .5-13
B-9 Inspect Length and Angle
Sensors............................5-13
B-10 Inspect Tilt Protection . . . . . . . .5-14
B-11 Inspect Drive Reducer Oil
Level...............................5-15
B-12 Inspect Slewing Reducer Oil
Level...............................5-15
B-13 Inspect Slewing Bearing
Bolts ...............................5-16
B-14 Lubricate Slewing Bearing . . .5-17
B-15 Inspect Platform Rotate
Cylinder Fasteners . . . . . . . . . . . . . . . .5-17
B-16 Test Cylinder Drift . . . . . . . . . . . .5-18
B-17 Test Counterbalance Valve
Locking ............................5-18
B-18 Test Oscillate Outriggers . . . . .5-19
B-19 Inspect Battery . . . .. . . . . . . . . . .5-19
Checklist C Procedures . . . . . . . . . . . . . .5-20
C-1 Inspect Boom Extending/
Retracting Wire Ropes and
Pulleys.............................5-20
C-2 Replace Air filter of Hydraulic
Tank ...............................5-20
C-3 Inspect Weighing System . . . . .5-20
Checklist D Procedures . . . . . . . . . . . . . .5-21
D-1 Replace Drive Reducer Gear
Oil..................................5-21
D-2 Replace Slewing Reducer
GearOil............................5-22
D-3 Replace Hydraulic Oil . . . . . . . . .5-22
D-4 Replace Hydraulic Tank
Suction Filter. . . . . . . . . . . . . . . . . . . . . . .5-22
D-5 Inpsect Boom Wear Pads . . . . .5-23
6 Repair Procedures .............. 6-1
Boom and Platform Components . . . . . 6-1
Boom and Platform Systems . . . . . . . 6-1
Platform Controller. . . . . . . . . . . . . . . . . . 6-2
Platform.............................6-2
Platform Rotate Motor . . . . . . . . . . . . . . 6-2
Jib Boom Assembly (TB26EJ
Plus&28EJ Plus only).............6-3
Platform Level Cylinder . . . . . . . . . . . . . 6-3
Cable Track Assembly . . . . . . . . .. . . . . 6-4
Steel Cable Tensioning Adjustment. 6-4
Main Boom Assembly . . . . . . . . . . . . . . 6-5
Chassis and Turntable Components . . 6-6