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GTH-844
Genie GTH-844 Service Manual
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Table of Contents
Table of Contents
7
Introduction
2
Serial Number Legend
3
Safety Rules
5
Personal Safety
6
Table of Contents
7
Machine Specifications
15
Performance Specifications
17
Hydraulic Specifications
18
Manifold Component Specifications
20
John Deere 4045TF270 Engine
21
John Deere 4045TF275 Engine
22
Deutz BF4 2012 Engine
23
Perkins 1104C-44T Engine
24
Perkins 1104C-44TA Engine
25
Dana T12000 Transmission
26
Dana T20000 Transmission
26
Dana Planetary 212 Drive Axle
27
Dana Planetary 213 Drive Axle
27
Specifications
27
Hydraulic Hose and Fitting Torque Specifications
28
About this Section
31
Observe and Obey
31
Pre-Delivery Preparation Report
32
Maintenance Inspection Report
35
C Checklist a Procedures
37
Inspect the Manuals and Decals
37
Perform Pre-Operation Inspection
38
Perform Function Tests
38
Lubricate the Machine
39
Perform Engine Maintenance - John Deere and Perkins Models
41
Perform Transmission Maintenance
41
Perform Engine Maintenance - Deutz Models
42
Perform 30 Day Service
42
Perform Transmission Maintenance
43
And GTH-844 Models
43
Perform Engine Maintenance - Perkins Models
43
Perform Axle Maintenance
44
Perform Engine Maintenance - John Deere Models
44
And GTH-844 Models
44
Perform Transmission Maintenance
45
A-15 Perform Axle Maintenance
46
B Checklist B Procedures
47
Inspect the Battery
47
Inspect the Electrical Wiring
47
Check the Exhaust System
48
Inspect the Engine Air Filter
49
Inspect the Tires, Wheels and Lug Nut Torque
49
Perform Hydraulic Oil Analysis
50
Inspect the Fuel and Hydraulic Tank Cap Venting Systems
51
Check the Boom Wear Pads
52
Lubricate the Driveshafts
53
Perform Engine Maintenance - John Deere Models
53
B Checklist C Procedures
54
Perform Engine Maintenance - Deutz Models
54
Perform Engine Maintenance - John Deere Models
54
Perform Axle Maintenance
55
Perform Transmission Maintenance
55
Perform Engine Maintenance - Perkins Models
56
Perform Axle Maintenance
56
Perform Axle Maintenance
57
B Checklist D Procedures
58
Inspect the Forks
58
Adjust the Boom Sequencing Chains
58
Replace the Hydraulic Tank Return Filter Element
61
Perform Engine Maintenance - Deutz Models
62
Perform Transmission Maintenance
62
Perform Axle Maintenance
63
Perform Engine Maintenance - Perkins Models
63
Perform Engine Maintenance - Deutz Models
64
C Checklist E Procedures
65
Test or Replace the Hydraulic Oil
65
Perform Engine Maintenance - John Deere Models
66
Perform Engine Maintenance - Perkins Models
66
Perform Engine Maintenance - Perkins Models
67
Perform Engine Maintenance - John Deere Models
68
Perform Engine Maintenance - Perkins Models
68
Perform Engine Maintenance - Deutz Models
69
Perform Engine Maintenance - Perkins Models
69
Repair Procedures
71
Boom Components
72
Boom Angle Limit Switch (All Models Except GTH-636)
72
Boom
73
Bodily Injury Hazard. Spraying
76
Boom Lift Cylinder
85
Boom Extension Cylinder
87
Fork Level Cylinder
88
Fork Rotate Cylinder (Option)
90
Operator's Compartment
93
Electrocution Hazard. Contact with Electrically Charged Circuits Could Result in Death or Serious Injury
93
Machine Controls
102
Fuel and Hydraulic Tanks
108
Fuel Tank
108
Hydraulic Tank
109
Gradually. Do Not Allow Oil to Squirt
109
Engines
110
Engine Fault Codes - John Deere 4045TF275 Engine
111
Transmission
112
Hydraulic Pumps
114
Hydraulic Pump
114
Or Spray
116
Main Valve Manifold Components
118
Tilt Limiter Manifold Components
119
Dual Pilot Check Manifold Components
120
Boom Activated Rear Lock-Up Manifold Components
121
Fork Rotate Speed Manifold Components (Option)
122
Control Block Manifold Components
123
Fork Tilt Manifolds Components
124
Rear Lock-Up Manifold Components
125
Parking Brake Manifold Components
126
Differential Lock-Up Manifold Components (Optional on GTH-636 and GTH-644)
127
Sway Manifold Components
128
Fork Rotate Manifold Components (Option)
129
Sway Directional Manifold Components
130
Outrigger Manifold Components - GTH-1048 and GTH-1056
131
Controller Relief (Drop Block) Manifold
132
GTH-636, GTH-1048 and GTH-1056
132
Boom Lift and Boom Extension Cylinders Manifold Components
133
Fork Level Cylinder Manifold Components
134
Fork Rotate Cylinder Manifold Components (Option)
135
Pump Destroke Manifold Components
136
GTH-636, GTH-1048 and GTH-1056
137
Boom Activated Sway Lock-Up Manifold Components
138
Valve Adjustments - Control Block Manifold
139
Valve Adjustments - Tilt Limiter Manifold
141
Valve Coils
142
Remove All Rings, Watches and Other Jewelry
142
Axles
143
To Adjust Front Axle Service Brakes
144
To Adjust Parking Brakes
144
Outriggers
146
Immediately Tag and Remove from Service a Damaged or Malfunctioning Machine
149
Repair any Machine Damage or Malfunction before Operating the Machine
149
Troubleshooting and Repair Procedures Shall be Completed by a Person Trained and Qualified on the Repair of this Machine
149
Before Troubleshooting
149
Be Sure that All Necessary Tools and Test Equipment Are Available and Ready for Use
149
Read, Understand and Obey the Safety Rules and Operating Instructions in the Appropriate Operator's Manual on Your Machine
149
Malfunction Discovered
149
Return to Service
149
General Repair Process
149
Identify Symptoms
149
Engine Fault Codes - GTH-1048 and GTH-1056
150
Hydraulic Pump
152
Boom Functions
154
Drive Functions
161
Steer Functions
162
Brake Functions
165
Sway Functions
166
Connections very Slowly to Allow
169
Hydraulic Oil Can Penetrate and Burn Skin. Loosen Hydraulic
169
The Oil Pressure to Dissipate
169
Schematics
171
Electrical Component and Limit Switch Legends
172
Section 6 • Schematics
172
Electrical and Hydraulic Symbols Legends
173
Electrical Schematics
173
Hydraulic Schematics
173
Electrical Schematic - GTH-636 with John Deere Power
174
C Electrical Schematic
176
And GTH-844 with John Deere Power
178
Electrical Schematic - GTH-636 with Perkins Power
176
Electrical Schematic - GTH-644, GTH-842 and GTH-844 with Perkins Power
180
Electrical Schematic - GTH-644, GTH-842 and GTH-844 with Deutz Power
182
Electrical Schematic - GTH-1048 and GTH-1056 with John Deere Power
184
Electrical Schematic - GTH-1048 and GTH-1056 with Perkins Power
186
With Single Joystick
186
A Hydraulic Schematic
188
Hydraulic Schematic GTH-636 with Single Joystick
188
GTH-636 with Dual Joysticks
189
B Hydraulic Schematic
189
Hydraulic Schematic GTH-636 with Dual Joysticks
189
And GTH-844 with Single Joystick
190
A Hydraulic Schematic
190
Hydraulic Schematic GTH-644, GTH-842 and GTH-844 with Single Joystick
190
GTH-644, GTH-842 and GTH-844 with Dual Joysticks
191
A Hydraulic Schematic
192
GTH-1048 and GTH-1056 with Dual Joysticks
193
Hydraulic Schematic - GTH-1048 and GTH-1056 with Single Joystick
192
Other manuals for Genie GTH-844
Service And Repair Manual
187 pages
Maintenance Manual
65 pages
Operator's Manual
64 pages
5
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Genie GTH-844 Specifications
General
Maximum Lift Height
44 ft
Power Source
Diesel
Maximum Lift Capacity
8, 000 lbs
Lift Capacity
8, 000 lbs (3, 629 kg)
Machine Width
6.5 ft
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