© Aug 2020 ii GTZZ14EJ&16EJ Maintenance Manual
Following a Maintenance Schedule . . . 5-2
Checklist A Procedures . . . . . . . . . . . . . . . 5-2
A-1 Inspect All Manuals. . . . . . . . . . . . . 5-2
A-2 Inspect All Decals . . . . . . . . . . . . . . 5-3
A-3 Inspect Damaged, Loose or
LostParts...........................5-3
A-4 Inspect Hydraulic Oil Level . . . . . 5-3
A-5 Inspect Hydraulic Leakage . . . . . 5-4
A-6 Functional Tests . . . . . . . . . . . . . . . . 5-4
A-7 Inspect Battery Level . . . . . . . . . . . 5-6
A-8 Inspect the Raised Limit
Function ............................5-6
A-9 Perform Maintenance after 30
Days ................................5-6
Checklist B Procedures . . . . . . . . . . . . . . . 5-6
B-1 Inspect Electrical Wiring . . . . . . . . 5-6
B-2 Inspect the battery. . . . . . . . . . . . . . 5-6
B-3 Inspect Rim, Tire and Fasteners5-7
B-4 Inspect Hydraulic Oil . . . . . .. . . . . 5-8
B-5 Test Braking Device . . . . . . . . . . . . 5-8
B-6 Inspect Brake Manual Release
Function ............................5-8
B-7 Inspect Slewing Bearing Bolts. . 5-9
B-8 Lubricate Slewing Bearing . . . .5-10
B-9 Inspect Air filter of Hydraulic
Tank ...............................5-10
B-10 Replace High-Pressure Filter 5-10
B-11 Inspect Drive Reducer Oil
Level...............................5-11
B-12 Inspect Slewing Reducer Oil
Level...............................5-11
B-13 Test boom action time. . . . . . . . 5-11
B-14 Test Drive Speed. . . . . . . . . . . . .5-12
B-15 Test Emergency Lowering
Function ...........................5-13
B-16 Test Tilt Protection System . . .5-13
Checklist C Procedures . . . . . . . . . . . . . .5-14
C-1 Replace hydraulic oil tank air
filter................................5-14
C-2 Test Weighing System. . . . . . . . .5-14
Checklist D Procedures . . . . . . . . . . . . . .5-15
D-1 Inpsect Boom Wear Pads . . . . .5-15
D-2 Lubricate turntable slewing
bearing and slewing gear . . . . . . . . . .5-16
D-3 Replace Hydraulic Oil . . . . . . . . .5-16
D-4 Replace Hydraulic Tank
Suction Filter. . . . . . . . . . . . . . . . . . . . . . .5-16
D-5 Inspect Key Structures . . . . . . . .5-17
6 Repair Procedures .............. 6-1
Boom and Platform Components . . . . . 6-1
Boom and Platform Systems . . . . . . . 6-1
Platform Controller. . . . . . . . . . . . . . . . . . 6-1
Footswitch..........................6-2
Platform.............................6-2
Platform Swing Motor. . . . . . . . . . . . . . . 6-2
Jib Boom Assembly. . . . . . . . . . . . . . . . . 6-3
Cable Track Assembly . . . . . . . . .. . . . . 6-3
Main Boom Assembly . . . . . . . . . . . . . . 6-4
Telescope Boom Assembly . . . . . . . . . 6-5
Foldable Boom Assembly . . . . . . . . . . 6-5
Adjust Boom Clearance . . . . . . . . . . . . 6-6
Chassis and Turntable Components . . 6-6
Tires and Rims. . . . . . . . . . . . . . . . . . . . . . 6-6
Reducer and Drive Motor . . . . . . . . . . . 6-8
Steering System . . . . . . . . . . . . . . . . . . . . 6-8
Battery..............................6-9
Turntable Slewing Mechanism. . . . . . 6-9
Hydraulic System . . . . . . . . . . . . . . . . . . . .6-10
Hydraulic Symbols . . . . . . . . . . . . . . . . .6-10
Hydraulic Schematic Diagram . . . . . 6-11
Electrical System. . . . . . . . . . . . . . . . . . . . .6-12
Use and Maintenance of Lead-
Acid Battery (requires
maintenance) . . . . . . . . . . . . . . . . . .. . . .6-12
Use and Care of Lead-acid Battery
(maintenance-free) . . . . . . . . . . . . . . . .6-15
Use and Care of Lithium Battery . . .6-16
Electrical Symbols . . . . . . . . . . . . . . . . .6-17
