Name: Skyjack SJ843 TH
Brand: Skyjack
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SERVICE

MANUAL

190127AE

January 2021

ANSI

SJ643 TH, SJ843 TH

TELEHANDLERS

To order go to Discount-Equipment.com

Table of Contents4
Table of Contents5
Section 1 - Scheduled Maintenance10
Read and Heed10
Telehandler Definition10
Purpose of Equipment10
Use of Equipment10
Manual10
Service Policy and Warranty10
Operator Safety Reminders, Warnings and Precautions10
Maintenance and Inspection Schedule11
Owner's Annual Inspection Record11
Replacement Parts11
Maintenance and Service Safety Tips11
Hydraulic System & Component Maintenance and Repair12
Maintenance Hints12
About this Section13
Service Bulletins13
Maintenance and Inspection13
Maintenance Instructions13
Scheduled Maintenance Inspections15
Labels - a15
Electrical15
Mirrors - a15
Hydraulic15
Cylinders - a16
Frame16
Engine Compartment19
Transmission20
Boom - a20
10 Lifting Attachment - a20
11 Grease Fittings - B21
12 Operator's Cab21
Function Tests23
Section 2 - Maintenance Tables24
Standard and Optional Equipment25
Specifications and Features26
Tire/Wheel Specifications27
Recommended Fluids/Lubrication28
Pressure Setting29
Standard Hose Numbering System30
Torque Specifications for Fasteners (US)32
Torque Specifications for Fasteners (Metric)33
Torque Specifications for Hydraulic Couplings & Hoses34
Air Conditioner Temperature/Pressure Chart35
Section 3 - System Component Identification and Schematics36
Electrical Symbol Chart37
Hydraulic Symbol Chart38
Electrical Schematic Parts List39
Hydraulic Schematic Parts List42
Hydraulic Pump and Return Filter Ports Identification44
Steering Control Unit Ports Identification45
Service Brake Actuator (Brake Pedal) Ports Identification46
Auxiliary Block Ports Identification47
Joystick Port Identifications48
Premium Joystick Port Identifications49
Premium Joystick Manifold Port Identifications50
Optional Reserve Brake Manifold Port Identification51
Major Components Identification and Location52
Main Control Valve Port Identification53
Enclosed Cab Harness & Wiring Diagram56
Glow Plug Harness & Wiring Diagram57
Road Lights Harness & Wiring Diagram58
Work Lights Harness & Wiring Diagram59
Boom Lights Harness & Wiring Diagram60
Beacon Light Harness & Wiring Diagram61
Elevate Telematics Harness62
A/C Harness63
Heater & A/C Harness64
CVT Vehicle Harness65
CVT Transmission Harness66
Console Harness and Layout67
Console Harness Wiring Diagram68
Engine Harness69
Engine Harness Wiring Diagram70
Chassis Harness71
Chassis Harness Wiring Diagram72
Electrical Schematic73
Electrical Schematic - Premium Joystick76
Electrical Schematic for CVT79
Electrical Schematic for CVT with Premium Joystick83
Hydraulic Schematic87
Hydraulic Schematic (Reserve Brake Option)88
Hydraulic Schematic - Premium Joystick89
Hydraulic Schematic (Reserve Brake) - Premium Joystick90
Section 4 - Troubleshooting Information92
Introduction92
Electrical System93
Engine will Not Crank93
Engine Cranks but will Not Run94
All Electrical Controls Inoperative94
Park Brake will Not Release95
Transmission will Not Engage96
No Forward Drive96
No Reverse Drive97
No 1St Speed Range97
No 2Nd Speed Range97
10 No Boom Up, Front Steer Mode Only98
11 Front Steer Mode Only98
12 No 4W (Round) Steer Mode98
13 No Crab Steer Mode99
14 No Boom up99
15 Frame will Not Tilt over 40° with Boom below 40100
16 No Frame Level101
17 Function Does Not Switch103
Hydraulic System105
All Controls Inoperative105
No Boom Functions105
No Carriage Tilt107
No Frame Level108
No Aux. Functions109
Hard or no Steering109
Park Brake will Not Release110
Park Brake will Not Engage110
Service Brake will Not Engage110
Section 5 - Procedures112
General112
Safety and Workmanship112
Engine and Transmission112
Hour or Daily Routine Maintenance113
Check Engine Oil Level113
Check Coolant Level, Radiator and Hoses113
Check Transmission Fluid Level114
Check Air Cleaner Restriction and Filter Elements114
Check Hydraulic Oil Level115
Drain Fuel/Water Separator116
Fuel Tank116
Check Parking Brake116
Check Tire Pressure and Condition116
10 Check Seat Belt and Mounting Hardware117
11 Check Windshield Washer Fluid Level and Wiper Condition117
Hour or Weekly Routine Maintenance117
Grease Axle Pivot Bearings and King Pins117
Grease Drive Shaft U-Joints and Slip Joints118
Check Fork Pins119
Grease Frame Level Pivot Bushings119
Grease Boom Pivot and Boom Cylinders119
Grease Bottom Front & Top Rear Slide Pads120
Hour or Quarterly Routine Maintenance121
Check Lug Nut Torque121
Check Oil Level in Axle Differential Planetary Wheel Ends121
Check Oil Level in Axle Differentials122
Replace Engine Oil and Filter122
Change Engine Fuel Filter and Fuel/Water Separator124
Clean Hydraulic Tank Breather126
Torque Axle Mounting Bolts126
Inspect Boom Chains126
Check Boom Slide Pad Clearances127
10 Check Boom Chains Tension129
11 Chain Tension Adjustment130
1000 Hour or Annual Routine Maintenance131
Change Hydraulic Oil Filter131
Change Hydraulic Oil and Clean Hydraulic Tank132
Change Axle Differential Oil133
Change Axle Planetary Oil133
Change Engine Coolant134
Change Transmission Oil and Filter136
Change Continuously Variable Transmission (CVT) Oil and Filter138
Inspect Boom Chains140
Non-Routine Maintenance140
Boom Hoses and Sheaves Replacement140
Boom Chains Replacement144
Slide Pads Replacement Procedure148
Hydraulic Pressure Test Procedure150
Hydraulic Pump Testing Procedure153
T12000 Modulation153
Deutz Fault Codes157
Starter Replacement Procedure160
Bleeding Hydraulic Circuits162
Electronic Tilt Switch Setup Procedure163
Tilt Switch Replacement163
Reprogramming Existing Tilt Switch164
Test and Verify Tilt Circuit165
Park Brake Release167
Bearing Installation168

Brand	Skyjack
Model	SJ843 TH
Category	Boom Lifts
Language	English

Skyjack SJ843 TH Service Manual

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