© Nov. 2022 ii GTZZ25J 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
Major Modification and Repair Record 5-5
Checklist A Procedures . . . . . . . . . . . . . . . 5-6
A-1 Inspect All Manuals. . . . . . . . . . . . . 5-6
A-2 Inspect All Decals . . . . . . . . . . . . . . 5-7
A-3 Check for Damaged, Loose or
LostParts...........................5-7
A-4 Inspect Hydraulic Oil Level . . . . . 5-7
A-5 Inspect Hydraulic Leakage . . . . . 5-8
A-6 Inspect Fuel Level . . . . . . . . . . . . . . 5-8
A-7 Inspect Fuel Leakage . . . . . . . . . . 5-9
A-8 Inspect Engine Oil Level. . . . . . .5-10
A-9 Inspect Coolant Level . . . . . . . . .5-10
A-10 Inspect Engine Belt . . . . . . . . . . 5-11
A-11 Inspect Fuel Strainer (fuel-
water separator) . . . . . . . . . . . . . . . . . . .5-12
A-12 Inspect Cooling Fan. . . . . .. . . .5-13
A-13 Inspect Engine Intake
System.............................5-13
A-14 Functional Tests. . . . . . . . . . . . . .5-13
A-15 Perform Maintenance after
30 Days............................5-17
A-16 Exhaust Oscillate Cylinder . . .5-17
A-17 Check Connector Tilting . . . . .5-17
Checklist B Procedures . . . . . . . . . . . . . .5-19
B-1 Replace Hydraulic Oil Tank
Return Filter Element . . . . . . . . . . . . . .5-19
B-2 Inspect Rim, Tire and
Fasteners..........................5-19
B-3 Inspect Hydraulic Oil . . . . . . . . . .5-20
B-4 Inspect Cooling System . . . . . . .5-20
B-5 Replace Fuel Strainer (fuel-
water separator) Element . . . . . . . . . .5-20
B-6 Inspect Air filter of Hydraulic
Tank ...............................5-22
B-7 Replace High-Pressure Filter
Element............................5-22
B-8 Replace Air Filter Element of
Engine .............................5-23
B-9 Inspect Travel Switch. . . . . . . . . .5-23
B-10 Inspect Engine Exhaust
System.............................5-24
B-11 Inspect Drive Reducer Oil
Level...............................5-24
B-12 Inspect Slewing Reducer Oil
Level...............................5-24
B-13 Inspect Slewing Bearing
Bolts ...............................5-25
B-14 Lubricate Slewing Bearing . . .5-26
B-15 Inspect Platform Oscillating
Cylinder Fasteners . . . . . . . . . . . . . . . .5-26
B-16 Test Cylinder Drift . . . . . . . . . . . .5-27
B-17 Test Oscillate Cylinder
Exhausting and Counterbalance
Valve Locking . . . . . . . . . . . . . . . . . . . . . .5-27
B-18 Inspect Electrical Wiring . . . . .5-28
B-19 Inspect the Battery . . . . . . . . . . .5-28
B-20 Test Oscillate Outriggers . . . . .5-29
B-21 Test Drive Speed. . . . . . . . . . . . .5-29
B-22 Inspect Emergency Lowering 5-30
B-23 Inspect Tilt Protection . . . . . . . .5-30
B-24 Test Braking Distance . . . . . . . .5-31
Checklist C Procedures . . . . . . . . . . . . . .5-31
C-1 Replace Fuel Filter Element. . .5-31
C-2 Replace Air filter of Hydraulic
Tank ...............................5-32
C-3 Replace Engine Oil. . . . . . . . . . . .5-32
C-4 Replace Engine Oil Filter . . . . . .5-34
C-5 Test Weighing System. . . . . . . . .5-35
Checklist D Procedures . . . . . . . . . . . . . .5-35
D-1 Replace Drive Reducer Gear
Oil..................................5-35
