© Aug 2020 ii GTBZ26&28J Maintenance Manual
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...........................5-6
A-4 Inspect Hydraulic Oil Level . . . . . 5-6
A-5 Inspect Hydraulic Leakage . . . . . 5-6
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 . . . . . . . . . . 5-9
A-10 Inspect Engine Belt . . . . . . . . . .5-10
A-11 Inspect Fuel Filter . . . . . . . . . . . .5-10
A-12 Inspect Cooling Fan. . . . . . . . . . 5-11
A-13 Inspect Engine Intake
System.............................5-11
A-14 Functional Tests. . . . . . . . . . . . . . 5-11
A-15 Test Floating Outrigger (if
Equipped)..........................5-15
A-16 Test Drive Speed. . . . . . . . . . . . .5-15
A-17 Test Emergency Lowering
Function ...........................5-15
A-18 Test Tilt Protection System . . .5-16
A-19 Test Weighing System . . . . . . .5-16
A-20 Perform Maintenance after
30 Days............................5-17
Checklist B Procedures . . . . . . . . . . . . . .5-17
B-1 Replace Hydraulic Oil Tank
Return Filter . . . . . . . . . . . . . . . . . . . . . . .5-17
B-2 Inspect Rim, Tire and
Fasteners..........................5-18
B-3 Inspect Hydraulic Oil . . . . . .. . . .5-18
B-4 Inspect Cooling System . . . . . . .5-19
B-5 Replace Fuel filter . . . . . . . . . . . . .5-19
B-6 Inspect Air filter of Hydraulic
Tank ...............................5-19
B-7 Replace High-Pressure Filter. .5-20
B-8 Replace Air Filter of Engine . . .5-20
B-9 Inspect Length and Angle
Sensors............................5-21
B-10 Inspect Engine Exhaust
System.............................5-21
B-11 Inspect Drive Reducer Oil
Level...............................5-21
B-12 Inspect Slewing Reducer Oil
Level...............................5-22
B-13 Inspect Slewing Bearing
Bolts ...............................5-22
B-14 Lubricate Slewing Bearing . . .5-23
B-15 Inspect Platform Rotate
Cylinder Fasteners . . . . . . . . . . . . . . . .5-23
B-16 Test Cylinder Drift . . . . . . . . . . . .5-24
B-17 Test Float Cylinder
Exhausting and Counterbalance
Valve Locking . . . . . . . . . . . . . . . . . . . . . .5-24
B-18 Inspect Electrical Wiring . . . . .5-25
B-19 Inspect the battery . . . . . . . . . . .5-25
Checklist C Procedures . . . . . . . . . . . . . .5-25
C-1 Replace Fuel Filter Element. . .5-25
C-2 Inspect Boom Extend/Retract
Cables and Pulleys . . . . . . . . . . . . . . . .5-26
C-3 Replace Engine Oil. . . . . . . . . . . .5-26
C-4 Replace Engine Oil Filter . . . . . .5-27
Checklist D Procedures . . . . . . . . . . . . . .5-27
D-1 Replace Drive Reducer Gear
Oil..................................5-27
D-2 Replace Slewing Reducer
GearOil............................5-28
D-3 Replace Hydraulic Oil . . . . . . . . .5-28
D-4 Replace Hydraulic Tank
Suction Filter. . . . . . . . . . . . . . . . . . . . . . .5-28
D-5 Replace Coolant and Coolant
Hoses..............................5-29
