The Genie GTH-844 is a robust telehandler designed for efficient material handling applications. Built with engineering quality and reliability in mind, this machine offers exceptional performance and durability for demanding work environments. Its advanced design and robust construction ensure it can tackle a wide range of tasks, making it an indispensable tool for construction, industrial, and agricultural operations. The GTH-844 is engineered to provide operators with the power and precision needed to maximize productivity.
This Service Repair Manual, published in April 2018 with revision A1, provides comprehensive information for the maintenance and repair of the Genie GTH-844 telehandler, serial number GTH08E-11500 and above. It covers essential areas including detailed repair procedures for critical components such as boom systems, cylinders, hydraulic hoses, operator compartment, engines, hydraulic pumps, and manifolds. The manual also includes specifications for fluids, torque values, and engine options, equipping owners, mechanics, and technicians with the necessary knowledge to ensure the optimal performance, longevity, and safety of their GTH-844 telehandler.
Rev A1, April 2018
Serial Number Range: from GTH08E-11500
Content:
INTRODUCTION
Important Information
Find a Manual for this Model
Serial Number Legend
Section 1. SAFETY RULES
General Safety Rules
Section 2. SPECIFICATIONS
Machine Specifications
Performance Specifications
Hydraulic Oil Specifications
Hydraulic Component Specifications
Manifold Component Specifications
Air Conditioner Refrigerant Specifications
DEF Storage Specifications
Deutz TCD3.6 L4 Engine Specifications
Deutz TCD3.6 L4 T4F Engine Specifications
Perkins 1104D-E44TA Engine Specifications
Perkins 854E-E34TA Engine Specifications
Dana VDT12000 Transmission Specifications
Dana 212 Drive Axle
Hydraulic Hose and Fitting Torque Specifications
Torque Procedure
Section 3. REPAIR PROCEDURES
Introduction
Boom Components
1-1 Boom Proximity Switch
How to Test a Proximity Switch
How to Adjust the Boom Angle Proximity Switch
1-2 Boom
How to Replace the Boom Wear Pads
How to Remove the Lifting Fork Frame
How to Replace the Retraction Chain
How to Replace the Extension Chains
How to Remove the Boom
How to Disassemble the Boom
1-3 Boom Lift Cylinder
1-4 Boom Extension Cylinder
1-5 Fork Level Cylinder
1-6 Hydraulic Hoses
How to Adjust the Fork Level Cylinder and/or Auxiliary Hose
How to Replace the Fork Level Cylinder and/or Auxiliary Hoses
Operators Compartment
2-1 Operators Compartment
2-2 Machine Controls
How to Remove the Steering Column
How to Remove the Steering Wheel
How to Remove the Steer Orbitral
How to Remove the Joystick - Models with Electronic Joystick
How to Remove the Brake Pedal Assembly
How to Remove the Gauge Cluster Assembly
Fuel and Hydraulic Tanks
3-1 Fuel and Hydraulic Tanks
Engines
4-1 Engines
How to Repair the Perkins 1104D-E44TA Engine
How to Repair the Perkins 854E-34TA Engine
How to Repair the Deutz TCD3.6 Engine
4-2 Engine Fault Codes
Transmission
5-1 Transmission
Hydraulic Pump
6-1 Hydraulic Pump
How to Test the Function Pump
How to Remove the Function Pump
How to Install the Function
How to Prime the Function Pump
How to Adjust the Function Pump Standby Pressure
How to Adjust the Function Pump Pressure Compensator
Manifolds
7-1 PVG Manifold
7-3 Secondary Function Manifold Components
7-4 Brake Manifold Components
7-5 Valve Adjustments - Secondary Function Manifold
How to Set the Parking Brake System Pressure
How to Set the Differential Lock/Joystick System Pressure
How to Set the Rear Lock-up System Pressure
7-6 Valve Coils
Axle
8-1 Axles
Section 4. FAULT CODES
Introduction
Diagnostic Display
Diagnostic Display
Deutz TCD3.6 Engine Fault Codes
Perkins 1104 Engine Fault Codes
Section 5. SCHEMATICS
Introduction
Fuse Panel Layout
Deutz TCD3.6 T4F Module
Electrical Component & Wire Color Abbreviation Legend
Telematics Connector Pin Legend
Electrical Symbol Legend
Hydraulic Symbols Legend
Electrical Schematics - Harness Maps
Harness Map - Control System Ground Electronic Joystick
Harness Map - Beacon, Proximity Alarm and 3rd Gear Lockout
Harness Map - Deutz TCD3.6 Engine Battery Power and Ground
Harness Map - Perkins Engine Battery Power and Ground
Harness Map - Options Work Lights
Harness Map - Options Road Lights
Harness Map - Options Enclosed Cab with Heater
Harness Map - Options Enclosed Cab with HVAC
Electrical Schematic - View 1
Electrical Schematic - View 2
Electrical Schematic - Deutz T3 Eng Harness
Electrical Schematic - Deutz T4F Eng Harness
Electrical Schematic - Deutz T4F Eng Harness
Electrical Schematic - Deutz T4F Eng Harness
Hydraulic Schematics
Hydraulic Schematic - Electronic Joystick
Rev A1, April 2018
Serial Number Range: from GTH08E-11500
Content:
INTRODUCTION
Important Information
Find a Manual for this Model
Serial Number Legend
Section 1. SAFETY RULES
General Safety Rules
Section 2. SPECIFICATIONS
Machine Specifications
Performance Specifications
Hydraulic Oil Specifications
Hydraulic Component Specifications
Manifold Component Specifications
Air Conditioner Refrigerant Specifications
DEF Storage Specifications
Deutz TCD3.6 L4 Engine Specifications
Deutz TCD3.6 L4 T4F Engine Specifications
Perkins 1104D-E44TA Engine Specifications
Perkins 854E-E34TA Engine Specifications
Dana VDT12000 Transmission Specifications
Dana 212 Drive Axle
Hydraulic Hose and Fitting Torque Specifications
Torque Procedure
Section 3. REPAIR PROCEDURES
Introduction
Boom Components
1-1 Boom Proximity Switch
How to Test a Proximity Switch
How to Adjust the Boom Angle Proximity Switch
1-2 Boom
How to Replace the Boom Wear Pads
How to Remove the Lifting Fork Frame
How to Replace the Retraction Chain
How to Replace the Extension Chains
How to Remove the Boom
How to Disassemble the Boom
1-3 Boom Lift Cylinder
1-4 Boom Extension Cylinder
1-5 Fork Level Cylinder
1-6 Hydraulic Hoses
How to Adjust the Fork Level Cylinder and/or Auxiliary Hose
How to Replace the Fork Level Cylinder and/or Auxiliary Hoses
Operators Compartment
2-1 Operators Compartment
2-2 Machine Controls
How to Remove the Steering Column
How to Remove the Steering Wheel
How to Remove the Steer Orbitral
How to Remove the Joystick - Models with Electronic Joystick
How to Remove the Brake Pedal Assembly
How to Remove the Gauge Cluster Assembly
Fuel and Hydraulic Tanks
3-1 Fuel and Hydraulic Tanks
Engines
4-1 Engines
How to Repair the Perkins 1104D-E44TA Engine
How to Repair the Perkins 854E-34TA Engine
How to Repair the Deutz TCD3.6 Engine
4-2 Engine Fault Codes
Transmission
5-1 Transmission
Hydraulic Pump
6-1 Hydraulic Pump
How to Test the Function Pump
How to Remove the Function Pump
How to Install the Function
How to Prime the Function Pump
How to Adjust the Function Pump Standby Pressure
How to Adjust the Function Pump Pressure Compensator
Manifolds
7-1 PVG Manifold
7-3 Secondary Function Manifold Components
7-4 Brake Manifold Components
7-5 Valve Adjustments - Secondary Function Manifold
How to Set the Parking Brake System Pressure
How to Set the Differential Lock/Joystick System Pressure
How to Set the Rear Lock-up System Pressure
7-6 Valve Coils
Axle
8-1 Axles
Section 4. FAULT CODES
Introduction
Diagnostic Display
Diagnostic Display
Deutz TCD3.6 Engine Fault Codes
Perkins 1104 Engine Fault Codes
Section 5. SCHEMATICS
Introduction
Fuse Panel Layout
Deutz TCD3.6 T4F Module
Electrical Component & Wire Color Abbreviation Legend
Telematics Connector Pin Legend
Electrical Symbol Legend
Hydraulic Symbols Legend
Electrical Schematics - Harness Maps
Harness Map - Control System Ground Electronic Joystick
Harness Map - Beacon, Proximity Alarm and 3rd Gear Lockout
Harness Map - Deutz TCD3.6 Engine Battery Power and Ground
Harness Map - Perkins Engine Battery Power and Ground
Harness Map - Options Work Lights
Harness Map - Options Road Lights
Harness Map - Options Enclosed Cab with Heater
Harness Map - Options Enclosed Cab with HVAC
Electrical Schematic - View 1
Electrical Schematic - View 2
Electrical Schematic - Deutz T3 Eng Harness
Electrical Schematic - Deutz T4F Eng Harness
Electrical Schematic - Deutz T4F Eng Harness
Electrical Schematic - Deutz T4F Eng Harness
Hydraulic Schematics
Hydraulic Schematic - Electronic Joystick
