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Skyjack SJ61T SJ66T Telescopic Boom Lift Service Manual - 143871AM

Skyjack SJ61T SJ66T Telescopic Boom Lift Service Manual – 143871AM

Name: Skyjack SJ61T SJ66T Telescopic Boom Lift Service Manual - 143871AM
SKU: SKYJACK-SJ61T-SJ66T-143871AM-HD
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Skyjack SJ61T and SJ66T telescopic boom lift service manual (doc 143871AM, September 2025) covering scheduled maintenance, hydraulic and electrical schematics, troubleshooting, and repair procedures for units with serial numbers 97 000 001 to 97 000 917.

SKU: SKYJACK-SJ61T-SJ66T-143871AM-HD Category: Construction & Industrial Equipment Manuals Tags: Skyjack SJ61T service manual, Skyjack SJ61T SJ66T troubleshooting guide, Skyjack SJ66T telescopic boom manual, Skyjack telescopic boom hydraulic schematic Vendor: Operator Doc Hub

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Description

Skyjack SJ61T SJ66T Telescopic Boom Service Manual – 143871AM

This is the complete Skyjack SJ61T SJ66T Telescopic Boom Service Manual, document number 143871AM, dated September 2025. It is written specifically for MEWPs (mobile elevating work platforms) with serial numbers 97 000 001 to 97 000 917, and covers the ANSI/CSA, CE, and AS versions of the SJ61T and SJ66T telescopic boom lifts, including Deutz diesel engine units and GM dual fuel (gasoline/propane) engine units.

File Details

Manual type: Full Service and Maintenance Manual
Brand/Models: Skyjack SJ61T, SJ66T Telescopic Booms
Document number: 143871AM
Date: September 2025
Serial range: 97 000 001 to 97 000 917
Language: English
File format: PDF, digital download

Chapters Covered

Section 1 – Scheduled Maintenance
- Operator’s Responsibility for Maintenance, Electrocution Hazard, Safety Precautions
- Maintenance and Inspection Schedule, Owner’s Annual Inspection Record
- 1.1 Scheduled Maintenance Inspections (Electrical, Hydraulic, Engine Compartment, Control Compartment, Base, Platform, Boom, Special Options)
- 1.2 Function Tests (Base Control Console, Platform Control Console, Emergency Stop, Emergency Power, Drive, Steering, Brakes, Oscillating Axles, Cables)
Section 2 – Maintenance Tables and Diagrams
- Standard Hose Numbering System, Torque Specifications (Aerial Platform, Axles)
- Axle Maintenance Intervals, Tire Specifications, Floor Loading Pressure
- Hydraulic Specifications, Specifications and Features
- Dimension and Reach Diagrams (SJ61T, SJ66T), Axle Oscillation Diagrams
Section 3 – System Component Identification and Schematics
- Hydraulic and Electrical Symbol Charts, Wire Number and Color Code
- Hydraulic Schematic Parts List, Electrical Component Parts List
- Rotary Manifold, Brake Manifold, System Pump, Drive Pump, Drive Motors, Jib Valve Port Identifications
- Main Manifold Port/Electrical/Hydraulic Identifications, Main Harness and Engine Wiring Diagrams
- Platform and Base Control Console Diagrams (Deutz Diesel and GM Dual Fuel, ANSI/CSA/CE/AS)
- Full Hydraulic Schematic Diagrams, Full Electrical Schematic Diagrams
- Generator Control Valves, Harness Connections, 12kW Generator Connection Assembly
IMAGES PREVIEW
Section 4 – Troubleshooting Information
- 4.1 Electrical System (no power, engine won’t crank/start, all controls inoperative, individual boom/drive/steer function faults, drive torque, direction sensing)
- 4.2 Hydraulic System (boom, turret, extend/retract, jib, platform rotation/leveling, brakes, drive, steering, axle oscillation/lock)
- 4.3 Load Sensing System – CE (LED codes, alarm, error conditions, boom/drive function lockouts)
Section 5 – Procedures
- Platform HMI (Human Machine Interface), OCM keypad functions, OCM setup/unlock/adjustment procedures
- Boom wear pad inspection/shimming, extension cylinder and boom cable removal/inspection/installation, cable tension
- Turret: high pressure filter, turret rotation gear backlash, swing drive motor oil, battery replacement, bolt torque, electronic tilt switch setup
- Deutz diesel engine service (oil/filter, fuel filter, air filter, belt, oil cooler)
- GM dual fuel engine service (MAP/IAT sensor, LPG temperature sensor, throttle actuator, coolant sensor, ECU pin reference, fuse block)
- Hydraulic tank filter and oil change, manifold and pump pressure adjustments and testing
- Axle oil changes, torque hub and gearbox oil checks, oscillating axle cylinder bleeding, pin brake adjustment and inspection
- Grease points (turret rotation bearing/gear, drive axle, drive shaft), Load Sensing System – CE calibration with “Teach In” handset

Taken together, this manual gives a technician everything needed to keep an SJ61T or SJ66T telescopic boom running to spec: a structured inspection schedule, full component-level torque and fluid specifications, complete hydraulic and electrical schematics down to individual wire numbers and valve coils, symptom-based troubleshooting tables for both electrical and hydraulic faults, and hands-on procedures for everything from boom cable replacement to OCM controller calibration and CE load-sensing setup.

Complete PDF Bookmark Tree

Complete Bookmarks

The complete bookmarks in the “Skyjack SJ61T SJ66T Telescopic Boom Lift Service Manual – 143871AM” are as follows:

Coverp. 1

Table of Contentsp. 3

Section 1 – Scheduled Maintenancep. 5

Operator’s Responsibility for Maintenancep. 7

Aerial Platform Definitionp. 7

Purpose of Equipmentp. 7

Use of Equipmentp. 7

Manualsp. 7

Operatorp. 7

Service Policy and Warrantyp. 7

Optional Accessoriesp. 7

Scope of this Manualp. 8

Operator Safety Remindersp. 8

Electrocution Hazardp. 9

Safety Precautionsp. 10

Maintenance and Inspection Schedulep. 14

Owner’s Annual Inspection Recordp. 14

Replacement Partsp. 14

Maintenance and Service Safety Tipsp. 14

Hydraulic System & Component Maintenance and Repairp. 15

Maintenance Hintsp. 15

Railing Maintenance and Repairp. 16

Service and Maintenancep. 17

About this Sectionp. 17

Service Bulletinsp. 17

Maintenance and Inspectionp. 17

Maintenance Instructionsp. 17

Tablesp. 18

Table 1.1 Owner’s Annual Inspection Recordp. 18

Table 1.2 Maintenance and Inspection Checklistp. 19

Scheduled Maintenance Inspections and Function Testsp. 20

1.1 Scheduled Maintenance Inspectionsp. 20

1.2 Function Testsp. 29

Section 2 – Maintenance Tables and Diagramsp. 39

Tablesp. 40

Table 2.1 Standard Hose Numbering Systemp. 40

Table 2.2 Aerial Platform Torque Specificationsp. 42

Table 2.3 Axles Torque Specificationsp. 43

Table 2.4 Axles Maintenance Intervalsp. 44

Table 2.5 Tire Specificationsp. 45

Table 2.6 Floor Loading Pressurep. 46

Table 2.7 Hydraulic Specificationsp. 47

Table 2.8 Specifications and Featuresp. 48

Diagramsp. 50

Diagram 2.1 Dimension and Reach Diagram – SJ 61Tp. 50

Diagram 2.2 Dimension and Reach Diagram – SJ 66Tp. 51

Diagram 2.3 Axle Oscillation Diagramsp. 52

Section 3 – System Component Identification and Schematicsp. 53

Chartsp. 55

3.1 Hydraulic Symbol Chartp. 55

3.2 Electrical Symbol Chartp. 56

3.3 Wire Number and Color Codep. 57

Parts Listsp. 58

3.4 Hydraulic Schematic Parts Listp. 58

3.5 Electrical Component Parts Listp. 61

Diagrams and Schematicsp. 64

3.6 Rotary Manifold and Port Identifications (Dual Mount Plates)p. 64

3.7 Brake Manifold and Port Identificationsp. 65

3.8 System Pump and Port Identificationsp. 66

3.9 Drive Pump and Port Identificationsp. 67

3.10 Drive Motors and Port Identificationsp. 68

3.11 Jib Valve and Port Identificationsp. 69

3.12 No Jib Valve and Port Identificationsp. 70

3.13a Main Manifold and Port Identificationsp. 71

3.13b Main Manifold and Electrical Identificationsp. 72

3.13c Main Manifold and Hydraulic Identificationsp. 73

3.14 Main Harness Wiring Diagramp. 74

3.15 ECU Engine Wiring Diagram (Deutz Diesel Engine)p. 75

3.16 Glow Plug and EGR Harnesses (Deutz Diesel Engine)p. 76

3.17 Engine Interface Harness (GM Dual Fuel Engine)p. 77

3.18 Harnessesp. 78

3.19 Platform Control Cable Harnessesp. 79

3.20 Limit Switch Connectionsp. 80

3.21 Load Sensing Cable Connection (CE)p. 81

3.22a Hydraulic Schematic Diagramp. 83

3.22b Hydraulic Schematic Diagramp. 84

3.23 Platform Control Console Diagram (ANSI/CSA SJ 66T – Deutz Diesel Engine)p. 85

3.24 Platform Control Console Diagram (ANSI/CSA SJ 61T – Deutz Diesel Engine)p. 86

3.25 Platform Control Console Diagram (CE & AS SJ 66T – Deutz Diesel Engine)p. 87

3.26 Platform Control Console Diagram (ANSI/CSA SJ 66T – GM Dual Fuel Engine)p. 88

3.27 Platform Control Console Diagram (ANSI/CSA SJ 61T – GM Dual Fuel Engine)p. 89

3.28 Base Control Console Diagram (ANSI/CSA SJ 66T – Deutz Diesel Engine)p. 90

3.29 Base Control Console Diagram (ANSI/CSA SJ 61T – Deutz Diesel Engine)p. 91

3.30 Base Control Console Diagram (CE SJ 66T – Deutz Diesel Engine)p. 92

3.31 Base Control Console Diagram (AS SJ 66T – Deutz Diesel Engine)p. 93

3.32a Base Control Console Diagram (ANSI/CSA SJ 66T – GM Dual Fuel Tier 3 Engine)p. 94

3.32b Base Control Console Diagram (ANSI/CSA SJ 66T – GM Dual Fuel Tier 2 Engine)p. 95

3.33a Base Control Console Diagram (ANSI/CSA SJ 61T – GM Tier 3 Dual Fuel Engine)p. 96

3.33b Base Control Console Diagram (ANSI/CSA SJ 61T – GM Tier 2 Dual Fuel Engine)p. 97

3.34 Electrical Schematic Diagram (ANSI/CSA – Deutz Diesel Engine)p. 98

3.35 Electrical Schematic Diagram (ANSI/CSA – Deutz Diesel Engine with Generator Convenience)p. 99

3.36 Electrical Schematic Diagram (CE SJ 66T – Deutz Diesel Engine)p. 100

3.37 Electrical Schematic Diagram (AS SJ 66T – Deutz Diesel Engine)p. 101

3.38a Electrical Schematic Diagram (ANSI/CSA – GM Dual Fuel Tier 3 Engine)p. 102

3.38b Electrical Schematic Diagram (ANSI/CSA – GM Dual Fuel Tier 2 Engine)p. 103

3.39 Interface & Engine Electrical Schematic – GM Dual Fuelp. 104

3.41 Generator Control Valves and Port Indentifcationsp. 105

3.42 Generator and Oil Cooler Harness Connectionsp. 106

3.43 Generator Wire Kit Connectionsp. 107

3.44 12kW Generator Connection Assemblyp. 108

Introductionp. 111

Section 4 – Troubleshooting Informationp. 109

4.1 Electrical Systemp. 112

4.1-1 All Controls Inoperativep. 112

4.1-2 No Power To Platformp. 112

4.1-3 No Power to Basep. 112

4.1-4 Engine Will Not Crank from Basep. 113

4.1-5 Engine Will Not Crank from Platformp. 113

4.1-6 Engine Will Not Crank from Platform or Base (Deutz Diesel)p. 114

4.1-7 Engine Cranks but Will Not Start (Deutz Diesel)p. 114

4.1-8 Engine Will Not Crank from Platform or Base Control (GM Dual Fuel)p. 115

4.1-9 Engine Cranks but Will Not Start (GM Dual Fuel)p. 115

4.1-10 Glow Plug Circuit Inoperativep. 118

4.1-11 All Controls Inoperative from Base Consolep. 118

4.1-12 No Main Boom Down or Turret Rotate from Base Control Consolep. 119

4.1-13 No Boom Up from Base Control Consolep. 119

4.1-14 No Boom Down from Base Control Consolep. 119

4.1-15 No Turret Rotate Left from Base Control Consolep. 119

4.1-16 No Turret Rotate Right from Base Control Consolep. 120

4.1-17 No Telescope Retract From Base Control Consolep. 120

4.1-18 No Telescope Extend From Base Control Consolep. 120

4.1-19 No Platform Rotate Left From Base Control Consolep. 121

4.1-20 No Platform Rotate Right from Base Control Consolep. 121

4.1-21 No Platform Rotate Left or Right from Base Control Consolep. 122

4.1-22 No Jib Up from Base Control Consolep. 122

4.1-23 No Jib Down from Base Control Consolep. 123

4.1-24 No Jib Up Or Down From Base Control Consolep. 123

4.1-25 No Manual Platform Level Up From Base Control Consolep. 123

4.1-26 No Manual Platform Level Down From Base Control Consolep. 124

4.1-27 No Manual Platform Level Up From Platform Control Consolep. 124

4.1-28 No Manual Platform Level Down From Platform Control Consolep. 125

4.1-29 All Controls Inoperative From Platform Control Consolep. 126

4.1-30 No Boom Up From Platform Control Consolep. 127

4.1-31 No Boom Down From Platform Control Consolep. 127

4.1-32 No Turret Left from Platform Control Consolep. 128

4.1-33 No Turret Right from Platform Control Consolep. 128

4.1-34 No Toggle Switch Functions from Platform Control Consolep. 129

4.1-35 No Telescope Out from Platform Control Consolep. 129

4.1-36 No Telescope Out from Platform Control Consolep. 130

4.1-37 No Platform Rotate or Jib Function from Platform Control Consolep. 131

4.1-38 No Platform Rotate Left from Platform Control Consolep. 131

4.1-39 No Platform Rotate Right from Platform Control Consolep. 131

4.1-40 No Jib Up from Platform Control Consolep. 132

4.1-41 No Jib Down from Platform Control Consolep. 132

4.1-42 Mid Throttle Inoperativep. 132

4.1-43 High Throttle Inoperativep. 133

4.1-44 Brake will not Releasep. 134

4.1-45 No Drive and Steerp. 134

4.1-46 No Forward Drivep. 135

4.1-47 No Reverse Drivep. 135

4.1-48 No High Speed Drivep. 136

4.1-49 No Elevated Drivep. 137

4.1-50 No Left Steerp. 137

4.1-51 No Right Steerp. 137

4.1-52 Direction Sensing Inoperativep. 138

4.1-53 Steer Direction Sensing Inoperativep. 138

4.2 Hydraulic Systemp. 139

4.2-1 All Controls Inoperativep. 139

4.2-2 All Boom Functions Inoperativep. 139

4.2-3 No Main Boom Upp. 139

4.2-4 No Main Boom Downp. 139

4.2-5 No Turret Rotate Leftp. 140

4.2-6 No Turret Rotate Rightp. 140

4.2-7 No Boom Extendp. 140

4.2-8 No Boom Retractp. 141

4.2-9 No Jib Upp. 141

4.2-10 No Jib Downp. 141

4.2-11 No Platform Rotation Rightp. 142

4.2-12 No Platform Rotation Leftp. 142

4.2-13 Platform will not Level Downp. 142

4.2-14 Platform will not Level Upp. 142

4.2-15 Brake will not Releasep. 143

4.2-16 Brake will not Engagep. 143

4.2-17 No Drive Forward or Reversep. 143

4.2-18 No Forward Drivep. 144

4.2-19 No Reverse Drivep. 144

4.2-20 No High Speed Drivep. 144

4.2-21 No Right Steerp. 144

4.2-22 No Left Steerp. 144

4.2-23 Axle Will Not Oscillatep. 145

4.2-24 Axle Will Not Lockp. 145

4.3 Load Sensing System – CEp. 146

4.3-1 Green Power LED is not Flashingp. 146

4.3-2 Load Cell red Alarm LED is ON (with platform empty)p. 146

4.3-3 Red Error LED is ONp. 146

4.3-4 Load Cell red Alarm LED is OFF (with platform overloaded)p. 146

4.3-5 Platform Indicator Light does not turn ONp. 146

4.3-6 Audible Alarm does not turn ONp. 146

4.3-7 Boom and Drive Functions are Enabled (with boom extended)p. 146

Generalp. 149

Safety and Workmanshipp. 149

Section 5 – Proceduresp. 147

Platformp. 149

5.1-1 Human Machine Interface (HMI)p. 149

5.1-2 User Interface Keysp. 150

5.1-3 How to Select Functionalityp. 152

5.1-4 How to View OCM Operationp. 153

5.1-5 How to Unlock and Modify OCM Settingsp. 154

5.1-6 OCM Pin Voltage Referencep. 155

5.1-7 Platform Controller Voltage Referencesp. 158

Boomp. 159

5.2-1 Check Wear Padsp. 159

5.2-2 Shimming Wear Padsp. 159

5.2-3 Cable Carrier Repairp. 159

5.2-4 Inspection and Replacement of Extension Cylinder and Boom Cables (61T/66T)p. 159

5.2-5 Cable Inspectionp. 163

5.2-6 Cable Tension (61T/66T)p. 166

Turretp. 166

5.3-1 Check and Replace High Pressure Filterp. 166

5.3-2 Adjust Turret Rotation Gear Backlashp. 170

5.3-3 Check Swing Drive Motor Gearbox Oilp. 170

5.3-4 Change Swing Drive Motor Oilp. 170

5.3-5 Battery Replacementp. 171

5.3-6 Bolt Torque Procedurep. 171

5.3-7 Electronic Tilt Switch Setup Procedurep. 172

5.3-8 Check Rotation Bearing for Axial Wearp. 175

Deutz Diesel Enginep. 176

5.4-1 Replace Engine Oil and Filterp. 176

5.4-2 Replace Fuel Filterp. 177

5.4-3 Replace Air Filterp. 177

5.4-4 Check Engine Beltp. 177

5.4-5 Check Oil Coolerp. 177

GM Dual Fuel Enginep. 178

5.5-1 GM Map and IAT Sensorp. 178

5.5-2 LPG Temperature Sensorp. 179

5.5-3 Throttle Actuatorp. 180

5.5-4 Engine Coolant Temperature Sensorp. 181

5.5-5 ECU Pin Reference Chartp. 182

5.5-6 Fuse Block Layoutp. 183

Hydraulic Tankp. 184

5.6-1 Change Hydraulic Tank Filterp. 184

5.6-2 Change Hydraulic Oilp. 184

Manifold and Hydraulic Pumpsp. 185

5.7-1 Hydraulic Brake Pressure Adjustmentp. 185

5.7-2 Hydraulic Standby Pressure Adjustmentp. 186

5.7-3 Hydraulic High Pressure Adjustmentp. 187

5.7-4 Hydraulic System Relief Valve Adjustmentp. 188

5.7-5 Test Charge Pump Pressure on Drive Pumpp. 189

5.7-6 Test Forward Drive Pressure on Drive Pumpp. 189

5.7-7 Test Reverse Drive Pressure on Drive Pumpp. 190

Axlesp. 191

5.8-1 Change Oil in Rear Axle (including Front Axle – 61T/66T)p. 191

5.8-2 Change Oil in Front Axle (4WD) (40T/45T)p. 191

5.8-3 Check Oil Level in Torque Hubp. 191

5.8-4 Check Oil Level in Axle Gearboxp. 192

5.8-5 Change Oil in Axle Gearboxp. 192

5.8-6 Bleeding Oscillating Axle Cylindersp. 192

5.8-7 Pin Brake Adjustmentsp. 193

5.8-8 Brake Inspectionp. 194

Grease Pointsp. 195

5.9-1 Lubricationp. 195

5.9-2 Grease Turret Rotation Bearingp. 195

5.9-3 Grease Turret Rotation Gearp. 195

5.9-4 Grease Drive Axlep. 196

5.9-5 Grease Drive Shaftp. 196

Optionsp. 197

5.10-1 Load Sensing System – CEp. 197

What You Can Do With This Skyjack SJ61T SJ66T Service Manual

With this Skyjack SJ61T SJ66T telescopic boom service manual, you can perform daily, frequent, annual, and bi-annual inspections exactly as Skyjack specifies, trace and repair no-drive, no-steer, no-boom-function, and brake-release faults using the wire-numbered troubleshooting tables, rebuild or replace hydraulic valves and cylinders with correct torque and pressure settings, and carry out engine-specific service on both the Deutz diesel and GM dual fuel platforms. Whether you’re servicing the base or platform control console, adjusting the turret rotation gear backlash, calibrating the electronic tilt switch, or verifying the CE load-sensing system, this document gives you the manufacturer’s own procedures and specifications rather than guesswork.

Using the correct torque values, hydraulic pressure settings, and wiring references from this SJ61T SJ66T service manual matters directly for safety on an aerial work platform — mismatched brake pressure, an out-of-spec tilt switch, or a misdiagnosed limit switch can affect stability and function. This manual is delivered as an instant PDF download immediately after purchase, with no shipping wait. You can view, search, and print it from a computer, tablet, or phone, keeping this Skyjack SJ61T SJ66T service manual on hand in the shop or in the field whenever you need it.

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Skyjack SJ61T SJ66T Telescopic Boom Lift Service Manual – 143871AM

Description

Skyjack SJ61T SJ66T Telescopic Boom Service Manual – 143871AM

File Details

Chapters Covered

IMAGES PREVIEW

Complete Bookmarks

What You Can Do With This Skyjack SJ61T SJ66T Service Manual

Reviews

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