Operator Manual for John Deere 848G 660D Skidder PDF Download
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John Deere 848G / 660D SKIDDER Operator’s Manual – PDF DOWNLOAD
Description
John Deere 848G / 660D SKIDDER Operator’s Manual – PDF DOWNLOAD
FILE DETAILS:
John Deere 848G / 660D SKIDDER Operator’s Manual – PDF DOWNLOAD
P/N: F386464_SK
Language: English
Division: Forestry
Product Lines: Skidders
Publication Type: Operator’s Manuals
Associated Models: 848G, 660D
Series: G SERIES, D SERIES
Serial: WC848GX001159–
WC660DX001340–
Timberjack / John Deere 848G & 660D Skidders
IMAGES PREVIEW OF THE MANUAL:

TABLE OF CONTENTS:
John Deere 848G / 660D SKIDDER Operator’s Manual – PDF DOWNLOAD
Contents 5
Safety — Safety Features 9
Skidder Safety Features 9
Safety—General Precautions 10
Recognize Safety Information 10
Follow Safety Instructions 10
Operate Only If Qualified 10
Wear Protective Equipment 11
Avoid Unauthorized Machine Modifications 11
Inspect Machine 11
Stay Clear Of Moving Parts 12
Avoid High-Pressure Fluids 12
Handle Starting Fluid Safely 13
Beware Of Exhaust Fumes 13
Prevent Fires 14
Prevent Battery Explosions 14
Handle Chemical Products Safely 15
Dispose of Waste Properly 15
Prepare for Emergencies 15
Safety—Operating Precautions 16
Use Steps And Handholds Correctly 16
Start Only From Operator’s Seat 16
Use And Maintain Seat Belt 16
Prevent Unintended Machine Movement 17
Avoid Work Site Hazards 17
Operate Machine Safely 18
Keep Riders Off Machine 18
Avoid Backover Accidents 19
Avoid Machine Tip Over 19
Operating on Slopes 20
Operating Or Traveling On Public Roads 20
Inspect and Maintain ROPS 20
Keep the Operator Protective Structure (OPS) in Place 21
Add And Operate Attachments Safely 21
Safety—Maintenance Precautions 22
Park And Prepare For Service Safely 22
Service Cooling System Safely 22
Service Accumulator Systems Safely 23
Remove Paint Before Welding or Heating 23
Make Welding Repairs Safely 24
Drive Metal Pins Safely 24
Safety — Safety Signs 25
848G Skidder Safety Signs 25
Operator’s Station 28
Instrument Panel 28
Instrument Panel Functions 29
Instrument Bulb Test Button 30
Cab Temperature Control 30
Road and Work Lights 32
Windshield Washer and Wiper 33
Ignition Switch 34
Battery Disconnect Switch 34
Horn Button 35
Cold Start Pump Unloading Button 35
Cold Weather Starting Aid (Option) 36
Electronic Gear Selector (EGS) 36
EGS Override Switch 36
Winch Control Lever 37
Parking Brake Switch 37
Pedals 37
Transmission De-clutch Switch 38
Axle Differential Lock Switch 38
First Aid Kit Location 38
Alternate Exit 39
Fire Extinguisher 39
Air Vents 39
Fuse Panel — Lower 40
Radio 40
Fuse Panel — Upper 40
Two-Way Radio Location 41
Pressurized Water Tank (Option) 41
Seat Controls 41
Door Stop 42
Operating the Machine 43
Pre-Start Checks 43
Before Starting the Engine 44
Starting the Engine — Above 4°C (40° F) 45
Starting the Engine — Below 4°C (40° F) 46
Engine Warm Up 47
Idling the Engine 47
Cold Weather Warm-Up 48
Stopping the Engine 49
Reducing Engine Load 50
Engine Break-In Procedure 50
Operating the Transmission 51
Steering the Skidder 57
Using the Decking Blade 57
Using the Winch 58
Using the Grapple 59
Roading the Skidder 62
Transporting the Skidder 63
Towing the Skidder 64
Tilting the Cab 69
Maintenance — Machine 73
Maintenance Preparation 73
Fluids and Lubricants Specifications Table 74
Break-in Oil 76
Diesel Engine Oil 77
Recommended Hydraulic System Oils 78
Transmission/Winch Oil 79
Axle Oil 80
Diesel Fuel 81
Low Sulfur Diesel Fuel Conditioner 82
Diesel Fuel Storage 82
Grease 83
Diesel Engine Coolant 84
Sampling Programs 85
Supplemental Coolant Additives 86
Replenishing Supplemental Coolant Additives (SCA’s) Between Coolant Changes 87
Fire Suppression Water Tank Fill 88
Lubricant Storage 88
Alternative and Synthetic Lubricants 89
Mixing of Lubricants 89
Maintenance — Periodic Maintenance 90
Service Your Machine at Specified Intervals 90
Check the Hourmeter Regularly 90
Use Correct Fuels and Lubricants 90
Using the Frame Lock 90
Engine Break in Period 91
Maintenance and Repair Record Keeping System 92
OILSCAN PLUS®, COOLSCAN PLUS®, and 3-Way Coolant Test Kit 93
Periodic Maintenance Table 94
Maintenance — As Required 99
Coolant System Cleaning 99
Bleed Fuel System 99
Clear Cab Drain Holes 101
Maintenance — Every 10 Hours or Daily 102
Check Engine Oil Level 102
Check Engine Air Intake 102
Check and Clean Engine Air Filter 103
Check Fuel/Water Separator 103
Check Engine Coolant Level 104
Lubricate Rear Frame Grease Block 104
Check Fuel Level 105
Check Hydraulic Fluid Level 105
Check Transmission Oil Level 106
Lubricate Front Frame Grease Blocks 107
Lubricate Rear Steering Cylinder Pins 107
Lubricate Frame Hinge Pins 108
Lubricate Decking Blade Pins 108
Lubricate Arch, Boom and Grapple Pins 109
Check Snubber Adjustment 111
Clean External Surfaces & Engine Compartment 112
Fill Windshield Washer Reservoir 112
Clean Air Conditioner Primary Filter 113
Check Water Tank Pressure 113
Check Cab Tilt Locking Pin Bolts 115
Maintenance — Every 50 Hours or Weekly 116
Clean Oil Cooler and Radiator Fins 116
Check Axle Differential Oil Level 117
Check and Clean Axle Breathers 117
Check Fire Extinguisher Pressure 118
Inspect For Loose Bolts, Oil Leaks, Wear or Damage 118
Check Tire Condition and Pressure 118
Check Wheel Fastener Torque 119
Check Air Conditioner Secondary Filter 119
Check Heater Air Filter (Cable Option Only) 119
Check Air Conditioner Condenser Fins 120
Check Hand Pump Oil Level 120
Maintenance — Every 100 Hours or Two Weekly 121
Lubricate Drive Shafts 121
Maintenance — Every 250 Hours 122
Drain Water From Fuel Tank 122
Clean Transmission Breather 122
Change Engine Oil and Filter 123
Change Hydraulic Oil Filter 124
Check Step Condition 125
Maintenance — Every 500 Hours 126
Change Hydraulic Oil 126
Change Engine Air Filter Elements 128
Check Radiator Hoses 128
Replace Primary Fuel Filter (Water Separator) 128
Replace Final Fuel Filter 130
Change Transmission Oil Filter 132
Inspect Serpentine Belt 133
Check Engine Valve Lash Clearance 133
Maintenance — Every 1000 Hours 134
Change Transmission Oil 134
Change Winch Oil 136
Change Axle Differential Oil 137
Test Engine Coolant 139
Maintenance — Every 2000 Hours 140
Adjust Engine Valve Lash Clearance 140
Check Brake Wear 140
Maintenance — Every 3000 Hours 141
Change Engine Coolant 141
Miscellaneous — Machine 142
Checking the Engine Torsional Damper 142
Cleaning the Crankcase Vent Tube 142
Service Batteries Carefully 143
Using Booster Batteries 144
Precautions for Alternator and Regulator 146
Welding on Machine 146
Replacing Fuses 147
Replacing Fuses 148
Inspecting the Air Conditioning System 149
Accelerator Pedal Adjustment 153
Service Brake Pedal Adjustment 154
Inspecting and Cleaning Windows 155
Check Oil Lines and Fittings 156
Wheel Installation Instructions 156
Conversion Table for Pressures 157
Miscellaneous — Operational Checkout 158
Operational Checkout 158
Gauge Instrument Panel Checks 158
Ignition System Checks 160
Brake Checks 161
Driving Checks 162
Hydraulic Functions Checks 165
Winch 168
Accessories 175
Heater/Pressurizer and Air Conditioner Checks 177
Operator’s Compartment Checks 179
Miscellaneous Checks 181
Miscellaneous — Troubleshooting 183
General Troubleshooting 183
Diagnose Engine 184
Diagnose Electrical System 187
Diagnose Transmission 188
Diagnose Transmission Controller 189
Diagnose Service Brake 189
Diagnose Parking Brake 190
Diagnose Drivetrain 191
Diagnose Hydraulic Pump 192
Diagnose Hydraulic Cylinders 192
Diagnose Steering System 193
Diagnose Implements (Decking Blade, Arch, Grapple) 193
Diagnose Winch 194
Diagnose Cab Heater 195
Diagnose Air Conditioning 196
Miscellaneous — Storage 197
Storage 197
Miscellaneous — Serial Numbers 199
Keep Machines Secure 199
Keep Proof of Ownership 199
Model and Serial Number Record 200
Miscellaneous — Specifications 201
848G Cable Skidder Machine Dimensions 201
848G Grapple Skidder Machine Dimensions 203
130 in Grapple Head Dimensions 205
Power Unit Specifications 206
Power Train Specifications 207
Brake Specifications 208
Electrical System Specifications 208
Hydraulic Specifications 209
Winch Specifications (Grapple Skidder) 212
Winch Specifications (Cable Skidder) 212
Miscellaneous Specifications 213
S.V 03/24
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