Advance acoustic 7765 User manual

Advance 7765 / Nilsk CR1500
6/12 Revised 1/18 Form No. 56043160
English
Service Manual
Advance 7765 Models:
• 56514925 (Variable Dump Gas)
• 56514926 (Variable Dump LP)
• 56514927 (Variable Dump Diesel)
• 56514928 (Manual Dump Gas)
• 56514929 (Manual Dump LP GM3.0L)
• 56514930 (Manual Dump Diesel S4Q2)
• 56514931 (Variable Dump LP)
Nilsk CR1500 Models:
• 56514850 (Variable Dump Gas)
• 56514852 (Variable Dump LP)
• 56514854 (Variable Dump Diesel))

iiService Manual – Advance 7765 / Nilsk CR1500
Contents
General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
General Machine Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Machine Congurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Hydraulic System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Drive and Steering Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Solution System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Scrub System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Squeegee System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Recovery System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Main Sweep System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Side Sweep System (optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Dust Control System (variable dump models only) . . . . . . . . . . . . . . . . . . 11
Service Manual Purpose and Application . . . . . . . . . . . . . . . . . . . . . . . . . .11
Other Reference Manuals and Information Sources . . . . . . . . . . . . . . . . . . . . 12
Nilsk-Advance Publications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Engine Manufacturers’ Technical Manuals. . . . . . . . . . . . . . . . . . . . . . .12
Diagnostic and Service Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Parts and Service. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Nameplate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Cautions and Warning Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
General Safety Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
Hopper Safety Lock Arm (variable dump only) . . . . . . . . . . . . . . . . . . . . . . .18
Jacking the Machine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
Transporting the Machine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
Towing or Pushing the Machine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
Technical Specications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
General Specications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
Overall Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Engine and Machine Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Fastener Torque Specications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Recommended Service Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Maintenance Schedules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Daily Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
Weekly Maintenance/Every 50 Hours . . . . . . . . . . . . . . . . . . . . . . . 26
Maintenance Every 100 Hours . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Maintenance Every 200 Hours . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Maintenance Every 250 Hours . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Maintenance Every 400 Hours . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Maintenance Item Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Lubrication Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Lubrication Every 100 Hours . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Lubrication Every 250 Hours . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
General Machine Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Major Machine Components. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
Machine Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Engine Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Gauges and Meters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Solution Control and Indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
ESP/Recycle Option Controls and Indicators. . . . . . . . . . . . . . . . . . . .35
Scrub System Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Squeegee and Recovery System Controls. . . . . . . . . . . . . . . . . . . . . .36
Main Broom Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Contents iiiService Manual – Advance 7765 / Nilsk CR1500
Side Broom Controls. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38
Hopper Controls (Variable Dump models) . . . . . . . . . . . . . . . . . . . . . 39
Dust Control and Filter Shaker Controls (Variable Dump models) . . . . . . . .40
Miscellaneous Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Dust Control System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Filter Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Dust Control Vacuum Fan Motor Assembly . . . . . . . . . . . . . . . . . . . . . .43
Dust Control Motor Valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Dust Control System Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . 45
Electrical Circuit Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Shaker Motor Nominal Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Dust Control System Hydraulic Diagrams . . . . . . . . . . . . . . . . . . . . . . . 46
Main Broom and Dust Control Motors Off . . . . . . . . . . . . . . . . . . . . .46
Main Broom and Dust Control Motors On . . . . . . . . . . . . . . . . . . . . . 47
Main Broom Motor On and Dust Control Motor Off (with Wet Sweep Bypass Option)
48
Component Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Dust Control Filter Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Specications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .56
Electrical System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Instrument Panel and Circuit Breakers . . . . . . . . . . . . . . . . . . . . . . . . 57
Foot Pedal Proximity Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Electrical Ladder Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Electrical Ladder Diagram, p/n 56382653, Rev. B, Page 1. . . . . . . . . . . . . . .59
Electrical Ladder Diagram, p/n 56382653, Rev. B, Page 2. . . . . . . . . . . . . . .60
Electrical Ladder Diagram, p/n 56382653, Rev. B, Page 3. . . . . . . . . . . . . . .61
Electrical Ladder Diagram, p/n 56382653, Rev. B, Page 4. . . . . . . . . . . . . . .62
Electrical Ladder Diagram, p/n 56382653, Rev. B, Page 6. . . . . . . . . . . . . . .63
Engine Harness - GM 3.0L Gas, p/n 56380222 . . . . . . . . . . . . . . . . . . . . .64
Engine Harness -GM 3.0L LPG, p/n 56380221 . . . . . . . . . . . . . . . . . . . . 65
Machine Harness Routing Diagram – Gas, LP and Diesel . . . . . . . . . . . . . . . . .66
Engine System (common) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Engine Frame Side System – Mitsubishi Diesel . . . . . . . . . . . . . . . . . . . . . . 68
Engine Frame Side System – GM Gas . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
Engine Frame Side System – GM LPG . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Scrub System Electrical System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .71
Shaker Motor and Hopper Electrical System . . . . . . . . . . . . . . . . . . . . . . . .72
Squeegee and Vacuum Fan Motor Electrical System. . . . . . . . . . . . . . . . . . . .73
Component Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
Relays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
Instrument Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
Circuit Breakers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
Foot Pedal Proximity Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
Specications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .76
Component Specications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

Contents ivService Manual – Advance 7765 / Nilsk CR1500
Engine System, Diesel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
Diesel Engine Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
Circuit Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .78
Component Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
Maintenance and Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
Engine Oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
Engine Coolant. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .82
Checking Engine Coolant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
Replacing Engine Coolant. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .83
Engine Air Filter Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
General Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
Engine Overheating Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
Loss of Oil Pressure Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
Specications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .86
Special Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
Engine System, Gasoline/LPG. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
GM Engine Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
Circuit Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .89
GM 3.0L Gasoline Fuel System Description . . . . . . . . . . . . . . . . . . . . . . 89
GM 3.0L LPG Fuel System Description . . . . . . . . . . . . . . . . . . . . . . . .89
Component Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
LPG and Gasoline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90
LPG . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .94
Gasoline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96
Firing Order and Plug Wire Routing . . . . . . . . . . . . . . . . . . . . . . . . . . 97
Maintenance and Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
Engine Oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
Engine Coolant. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .98
Checking Engine Coolant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 98
Replacing Engine Coolant. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .98
Engine Air Filter Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . .99
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
General Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
Engine Overheating Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
Loss of Oil Pressure Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101
Engine Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101
To Access the Engine Diagnostic Information Using the Controller Interface Kit and a
PC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101
To Access the Engine DTC Error Codes Manually. . . . . . . . . . . . . . . .103
Diagnostic Trouble Code (DTC) Chart – Sorted by DTC Number. . . . . . . . 104
Specications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .108
Engine Specications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108
Special Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109
Hopper System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110
Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110
Hopper – Manual Dump Machines . . . . . . . . . . . . . . . . . . . . . . . . . . 110
Hopper – Variable Dump Machines. . . . . . . . . . . . . . . . . . . . . . . . . . 111
Hopper System Wiring Diagram – Variable Dump Machine . . . . . . . . . . . . 113
Electrical Circuit Description – Variable Dump Machine . . . . . . . . . . . . . . 113

Contents vService Manual – Advance 7765 / Nilsk CR1500
Hopper System Hydraulic Diagrams – Variable Dump Machine . . . . . . . . . . 114
Hopper Control Valves in Neutral Position . . . . . . . . . . . . . . . . . . . 114
Lift Hopper. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .115
Lower Hopper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116
Open Hopper Dump Door . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117
Close Hopper Dump Door . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118
Component Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119
Lubrication Points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123
Hydraulic System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .124
Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124
Hydraulic Pumps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 124
Hydraulic Valves. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .125
Return Block/Manifold. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .126
Electrical Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .127
Electrical Circuit Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127
Hydraulic Schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128
Variable Dump Machine. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128
Manual Dump Machine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 129
Component Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130
Maintenance and Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134
Hydraulic Oil Level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134
Hydraulic Oil Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135
General Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135
General Information Regarding Checking Hydraulic Pressures . . . . . . . . . . 135
Checking Nominal Pressure Readings . . . . . . . . . . . . . . . . . . . . . . . . 136
Specications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .137
General Specications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .137
Scrub Deck Hydraulic Specications . . . . . . . . . . . . . . . . . . . . . . . . . 138
Transport Circuit Hydraulic Specications. . . . . . . . . . . . . . . . . . . . . .138
Steering Circuit Hydraulic Specications . . . . . . . . . . . . . . . . . . . . . . 139
Side Broom Hydraulic Specications – GM and Mitsubishi Engines . . . . . . . . 139
Main Broom Hydraulic Specications – GM Engines . . . . . . . . . . . . . . . . 140
Main Broom Hydraulic Specications – Mitsubishi Engines . . . . . . . . . . . . 140
Dust Control System Hydraulic Specications – GM Engines (Variable Dump Models)
141
Dust Control System Hydraulic Specications – Mitsubishi Engines (Variable Dump Models)
141
Squeegee System Hydraulic Specications – GM Engines. . . . . . . . . . . . . .142
Squeegee System Hydraulic Specications – Mitsubishi Engines. . . . . . . . . . 142
Main Control Valve Specications . . . . . . . . . . . . . . . . . . . . . . . . . . 143
Cylinder Control Valve Specications . . . . . . . . . . . . . . . . . . . . . . . . 144
Special Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145
Recovery System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146
Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 146
Recovery Tank – Standard Recovery System. . . . . . . . . . . . . . . . . . . . .146
Recovery Tank – ESP/Recycle System . . . . . . . . . . . . . . . . . . . . . . . . 147
Vacuum Motor/Fan Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . .148
Recovery System Wiring Diagram – Standard Recovery System . . . . . . . . . . 149
Electrical Circuit Description – Standard Recovery System. . . . . . . . . . . . .149
Recovery System Hydraulic Diagrams . . . . . . . . . . . . . . . . . . . . . . . . 150
Squeegee Vacuum Fan Off . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150

Contents viService Manual – Advance 7765 / Nilsk CR1500
Squeegee Vacuum Fan On . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150
Squeegee Vacuum Fan Stalled . . . . . . . . . . . . . . . . . . . . . . . . . . 151
Component Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152
Recovery Tank . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155
Daily Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .155
Recovery Tank . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155
Vacuum Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 156
Specications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .157
Special Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 157
Scrub System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 158
Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 158
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 158
Scrub Deck . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 158
Scrub Brush Motor Control Valves . . . . . . . . . . . . . . . . . . . . . . . . . . 159
Scrub Deck Hydraulic Cylinder and Control Valves . . . . . . . . . . . . . . . . . 160
Scrub System Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . .161
Circuit Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 161
Scrub Brush Motors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 161
Scrub Deck Cylinder. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .162
Scrub System Hydraulic Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . 163
Scrub Brush Motors Off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .163
Scrub Brush Motors On . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 165
Scrub Brush Motors Running in Reverse. . . . . . . . . . . . . . . . . . . . . 167
Scrub Deck Down at Normal Scrub Pressure . . . . . . . . . . . . . . . . . . 168
Scrub Deck Down at High Scrub Pressure . . . . . . . . . . . . . . . . . . . .169
Scrub Deck Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .170
Scrub Deck Up with Engine Shut Off . . . . . . . . . . . . . . . . . . . . . . 171
Component Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 172
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 174
Specications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .176
Component Specications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 176
Special Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 177
Solution System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .178
Functional Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .178
Overview – Standard Solution System . . . . . . . . . . . . . . . . . . . . . . . . 178
Solution Tank . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 179
Solution Flow Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 180
Overview – ESP/Recycle Option. . . . . . . . . . . . . . . . . . . . . . . . . . . .181
Detergent and Solution Tanks . . . . . . . . . . . . . . . . . . . . . . . . . . 182
Detergent Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 182
Solution Off in Neutral Option . . . . . . . . . . . . . . . . . . . . . . . . . . . . 183
Power Spray Wand (optional) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 184
Standard Solution System Wiring Diagram . . . . . . . . . . . . . . . . . . . . . 185
Circuit Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 185
ESP/Recycle Option Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . 186
Circuit Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 186
Component Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 187
Standard Solution System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .187
ESP/Recycle Option . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 190
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 192
Solution Tank . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 192
Detergent System (ESP/Recycle Option Only) . . . . . . . . . . . . . . . . . . . . 192
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 192

Contents viiService Manual – Advance 7765 / Nilsk CR1500
Specications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .194
Component Specications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 194
Solution System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 194
ESP Detergent System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 194
Squeegee System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 195
Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 195
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 195
Rear Squeegee Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 195
Swing Squeegee Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 196
Squeegee Lift Assembly And Squeegee Deck Cylinder. . . . . . . . . . . . . . . .197
Squeegee Deck Cylinder and Control Valves . . . . . . . . . . . . . . . . . . . . . 198
Squeegee System Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . 199
Circuit Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 199
Squeegee System Hydraulic Diagrams . . . . . . . . . . . . . . . . . . . . . . . . 200
Squeegee Up, Key Switch Off . . . . . . . . . . . . . . . . . . . . . . . . . . .200
Squeegee Up, Engine Running . . . . . . . . . . . . . . . . . . . . . . . . . . 201
Squeegee Down, Engine Running. . . . . . . . . . . . . . . . . . . . . . . . . 202
Component Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 203
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 205
General Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 205
Specications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .206
Steering System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .207
Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 207
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 207
Hydraulic Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 209
Power Steering Unit Description . . . . . . . . . . . . . . . . . . . . . . . . . 209
Steering Wheel Stationary . . . . . . . . . . . . . . . . . . . . . . . . . . . . 209
Steering Wheel Turned Toward the Right . . . . . . . . . . . . . . . . . . . . 210
Steering Wheel Turned Toward the Left . . . . . . . . . . . . . . . . . . . . .211
Steering Wheel Held in Full Right or Left Position . . . . . . . . . . . . . . . 212
Turning the Steering Wheel with the Engine Off . . . . . . . . . . . . . . . . 213
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 214
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 215
Removal and Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 215
Specications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .215
Sweep System, Main Broom . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .216
Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 216
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 216
Main Broom and Broom Drive Motor . . . . . . . . . . . . . . . . . . . . . . . . .216
Main Broom Lift Linkage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 217
Main Broom Motor Control Valve. . . . . . . . . . . . . . . . . . . . . . . . . . .218
Main Broom Sweep System Wiring Diagram. . . . . . . . . . . . . . . . . . . . .219
Circuit Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 219
Main Broom Sweep System Hydraulic Diagrams . . . . . . . . . . . . . . . . . . 220
Main Broom Motor Off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 220
Main Broom Motor On . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 221
Component Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 222
Maintenance and Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 225
To Adjust the Main Broom Height . . . . . . . . . . . . . . . . . . . . . . . . . . 225
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 226
Specications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .226

Contents viiiService Manual – Advance 7765 / Nilsk CR1500
Sweep System, Side Broom . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 227
Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 227
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 227
Side Broom Sweep System Wiring Diagram . . . . . . . . . . . . . . . . . . . . . 228
Circuit Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 228
Side Broom Sweep System Hydraulic Diagrams . . . . . . . . . . . . . . . . . . .229
Side Broom Motor Off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 229
Side Broom Motor On . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 230
Component Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 231
Maintenance and Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 232
To Adjust the Side Broom Height . . . . . . . . . . . . . . . . . . . . . . . . . . . 232
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 233
General Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 233
Specications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .233
Wheel System, Non-traction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .234
Functional Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .234
Maintenance and Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 236
Service Brake Adjustment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 236
Parking Brake Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 236
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 237
Specications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .237
Wheel System, Traction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 238
Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 238
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 238
Drive Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 238
Drive Pump Before Machine Serial Number 1000034942 . . . . . . . . . . . .238
Drive Pump After Machine Serial Number 1000034942 . . . . . . . . . . . . 239
Forward/Reverse Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 239
Forward/Reverse Controls – GM Engines Before s/n 1000034942. . . . . . . . . . 240
Forward/Reverse Controls – GM Engines After s/n 1000034942 . . . . . . . . . . 240
Foot Pedal Assembly – GM Engines . . . . . . . . . . . . . . . . . . . . . . . . . 241
Forward/Reverse Controls – Mitsubishi Diesel Engines Before s/n 1000034942 . . 242
Forward/Reverse Controls – Mitsubishi Diesel Engines After s/n 1000034942. . . 243
Rear Wheel and Rear Wheel Motor . . . . . . . . . . . . . . . . . . . . . . . . . .244
Electrical Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .245
Electrical Circuit Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 245
Hydraulic Diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 246
Rear Wheel Motor in Neutral . . . . . . . . . . . . . . . . . . . . . . . . . . . 246
Tow Valve in Bypass Position. . . . . . . . . . . . . . . . . . . . . . . . . . .247
Rear Wheel Motor in Forward or Reverse . . . . . . . . . . . . . . . . . . . . 248
Rear Wheel Motor Stalling Out . . . . . . . . . . . . . . . . . . . . . . . . . . 249
Maintenance and Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 250
Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .250
Hydroback Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 250
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 251
Specications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .251
Component Specications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 251
Wheel Drive System Torque Specications . . . . . . . . . . . . . . . . . . . . . . 252

9Service Manual – Advance 7765 / Nilsk CR1500
General Information
General Machine Description
Machine Congurations
The Advance 7765 and Nilsk CR1500 machines are industrial automatic rider sweeper/scrubbers with
multiple sweep/scrub single-pass coverage. The 7765 and CR1500 are all-hydraulically operated and are
equipped with power steering.
The machines are powered by a 3.0 liter, 86-hp GM gasoline or liquid propane gas (LPG) engine, or a 2.5
liter, 47.3-hp Mitsubishi diesel.
The 7765 machines are available in two different hopper congurations; a manual dump (MD) model and a
variable dump (VD) model. The CR1500 machines are only available in the variable dump conguration.
• The manual dump models have a smaller, xed hopper. A manual dump lever opens the hopper to empty
the hopper onto the oor below the machine.
• The variable dump models use a hydraulic cylinder to raise the hopper for emptying into a dumpster or
other receptacle. A separate hydraulic cylinder opens and closes the hopper dump door. Variable dump
models are also equipped with a hopper lter, dust control motor and impeller, and lter shaker motor.
Hydraulic System
The engine drives two hydraulic pumps that power the machine systems. All of the motors on the machine
are hydraulic except for the electric lter shaker motor.
• The 1.24 cubic inches per revolution (CIR) drive pump is a variable-displacement pump that powers the
rear wheel drive motor for propulsion.
• The dual-displacement auxiliary gear pump includes two separate 1.02 CIR pumping elements in one
unit that power the other machine work functions.
The scrub deck position, scrub brush motors, main broom motor, side broom motor, recovery vacuum motor,
hopper vacuum fan motor and squeegee position are all controlled by hydraulic solenoid valves actuated by
switches on the instrument panel.
The hopper lift and dump door hydraulic cylinders are controlled by mechanically-actuated hydraulic valves.
Drive and Steering Systems
The foot-activated directional control (drive) pedal controls the hydraulic oil ow from the variable-
displacement pump to the hydraulic rear wheel drive motor to determine machine speed and direction. A
hydroback (newer models) or mechanical centering device (older models) returns the pedal to the neutral
position when the pedal is released.
The power steering unit controls the oil ow to the hydraulic steering cylinder. The steering cylinder moves
a rack that turns a spur gear to steer the rear drive wheel.

General Information 10Service Manual – Advance 7765 / Nilsk CR1500
Solution System
The Solution System uses gravity feed to deliver the solution to the scrub brushes. A ball valve, actuated by
a mechanical solution control lever and linkage, controls the solution ow. The solution ow is continuously-
variable from no ow to approximately 1¾ GPM [6.6 LPM] at the low setting, and to approximately 3½ GPM
[13.2 LPM] at the high setting.
• The standard (non-recycling) Solution System delivers solution from the solution tank to the brushes.
The squeegee system picks up the water from the oor and the squeegee vacuum fan directs it into the
recovery tank. If detergent is to be used in the standard system, it must be mixed manually into the
solution in the solution tank.
• The ESP/Recycle option uses a solution pump to transfer ltered recovered water from the recovery tank
to the solution tank. A detergent pump adds detergent from a separate detergent tank into the solution
supply line to the scrub brushes. The detergent ow rate is adjusted with the DETERGENT FLOW knob on
the instrument panel.
Scrub System
The Scrub System uses three disc scrub brushes and has two selectable scrub pressures.
• The “normal” scrub setting provides approximately 252 lbs [114 kg] of scrub brush pressure.
• The “heavy” scrub setting provides approximately 600 lbs [272 kg.] of scrub brush pressure.
The scrub brushes are powered by individual hydraulic motors. A hydraulic cylinder extends and retracts
the scrub deck and controls the scrub pressure.
Squeegee System
The Accu-Track™ squeegee system picks up the wastewater from the oor and directs it into the vacuum
hose, which then carries the wastewater into the recovery tank. The squeegee assembly is designed to follow
the scrub path accurately even in tight turns.
A hydraulic cylinder raises and lowers the squeegee.
A proximity switch adjacent to the accelerator/directional control pedal raises the squeegee if the squeegee is
lowered and the pedal is moved to the reverse position.
Recovery System
The recovery vacuum motor creates a vacuum and sufcient airow to convey used cleaning solution from
the rear squeegee into the recovery tank.
On models equipped with the ESP/Recycle option, a solution transfer pump in the recovery tank pumps
ltered water from the recovery tank to the solution tank to extend the scrub time. The solution transfer
pump is controlled by a oat switch in the recovery tank.

General Information 11Service Manual – Advance 7765 / Nilsk CR1500
Main Sweep System
The Main Sweep System uses a 50” [106.6 mm] long by 14” [35.5 cm] diameter cylindrical main broom
to sweep dust and debris into the hopper in front of the scrub brushes. The main broom is powered by a
hydraulic motor and is raised and lowered manually via the main broom lift control lever and mechanical
linkage. There are two main broom sweep positions.
• The normal “sweep” position produces a 2”-3” [5-8 cm] broom pattern.
• The “oat” position is used for heavy sweeping or when sweeping extremely uneven surfaces, and
produces a 4”-5” [10-13 cm] broom pattern.
Side Sweep System (optional)
The Side Sweep System uses a 24” diameter rotary broom to sweep dirt and debris into the path of the main
broom. The Side Sweep System is standard on variable dump models and optional on manual dump models.
The side broom is powered by a hydraulic motor, and is raised and lowered manually via the side broom lift
knob and cable.
Dust Control System (variable dump models only)
The Dust Control System uses an impeller fan, driven by a hydraulic motor, to pull air from the hopper and
through a bafe system and lter to minimize the dust generated from sweeping. A pre-clean ap restricts
the heavier dust particles to an area below the lter. The lighter dust particles are trapped in the lter. An
electric shaker motor, controlled by a switch on the instrument panel, vibrates the lter assembly to shake
the ne dust from the lter to restore airow for effective dust control, and to prolong lter life.
Service Manual Purpose and Application
This Service Manual is a technical resource designed to aid service personnel in maintaining and repairing
the Advance 7765 / Nilsk CR1500 Sweeper/Scrubbers to ensure optimum performance and long service life.
Please read it thoroughly before servicing your machine.
Revision History
Revision Description of change
01/18 The following changes were made as a result of adding the R6 power relay. ECO 12724
implemented around April 2017
• Added Electrical Wiring Diagram Rev C
• Updated circuit operation description for squeegee system
• Added photo of R6 relay location
Claried forward speed specications

General Information 12Service Manual – Advance 7765 / Nilsk CR1500
Other Reference Manuals and Information Sources
Nilsk-Advance Publications
Model Name Model Number Instructions for Use
Form Number Parts List Form Number
Advance 7765 • 56514925 (VD Gas)
• 56514926 (VD LP)
• 56514927 (VD Diesel)
• 56514928 (MD Gas)
• 56514929 (MD LP GM3.0L)
• 56514930 (MD Diesel S4Q2)
• 56514931 (VD LP)
56041801 - English and Spanish 56042525
Nilsk CR1500 • 56514850 (VD Gas)
• 56514852 (VD LP)
• 56514854 (VD Diesel)
56041714: DA, NO, SV, FI
56041715: DE, FR, NL, RU
56041716: ES, PT, IT, GR
56041717: ET, LV, LT, SL
56041718: SK, CS, PL, HU
56041719: US, TR
56042488
These manuals can be found on the following Nilsk-Advance’s electronic supported databases:
• Nilsk-Advance Dealer Customer Zone
• Advance website: www.advance-us.com
• Nilsk website: www.nilsk.com
• EzParts service/parts CD-ROM
Engine Manufacturers’ Technical Manuals
Manual Name Publication Number
GM 3.0L Gasoline and LPG PSI Operation and Maintenance Manual 36100007/
REV020703
PSI Tier 3 Certied Mobile Diagnostic and
Troubleshooting Manual
PSITIER3 - G

General Information 13Service Manual – Advance 7765 / Nilsk CR1500
Diagnostic and Service Tools
In addition to a full set of metric and standard tools, the following items are required in order to successfully
and quickly perform troubleshooting and repair of Nilsk-Advance Industrial oor cleaning equipment.
• Digital voltmeter (DVM) with DC current clamp
• Hydrometer
• Battery load tester for checking 12V batteries
• Automotive fuel pressure test gauge (used on gasoline engines)
• Set of torque wrenches
These tools are also available from Nilsk-Advance, Inc.:
• PSI engine service kit, p/n 56109084; includes
an LPG Test Kit, p/n 56504450, and a Diagnostic
Communication Cable and software, p/n 56305647
PSI engine service kit, p/n 56109084
PSI LPG test kit, p/n 56504450
Diagnostic Communication Cable and software,
p/n 56305647

General Information 14Service Manual – Advance 7765 / Nilsk CR1500
• PSI diagnostics cable, 4-pin – 8-pin
(Generation 1 old style), p/n 56109083
• Hydraulic test gauge w/connector, 3000 psi range,
p/n 56504516
• Vacuum water lift gauge, p/n 56205281.
PSI diagnostics cable, 4-pin – 8-pin
(Generation 1 old style), p/n 56109083
Hydraulic test gauge w/connector
3000 psi range, p/n 56504516
Vacuum
70
60
50
40
30
20
10
0
80
90
100

General Information 15Service Manual – Advance 7765 / Nilsk CR1500
Conventions
All references to right, left, front and rear in this manual are as seen from the Operator’s seat position.
Parts and Service
Repairs should be performed by an Authorized Nilsk-Advance Service Center that employs factory-trained
service personnel and maintains an inventory of Nilsk-Advance original replacement parts and accessories.
Call the Nilsk-Advance Dealer named below for repair parts or service. Please specify the Model Number
(same as the Part Number) and Serial Number when discussing your machine.
(Dealer, afx service sticker here.)
Nameplate
The Model Number and Serial Number of the machine are shown
on the Nameplate located on the front of the hydraulic reservoir
enclosure, to the right and below the Operator seat.
This information is needed when ordering repair parts for the
machine.
Nameplate

General Information 16Service Manual – Advance 7765 / Nilsk CR1500
Cautions and Warning Symbols
Nilsk-Advance uses the symbols below to signal potentially dangerous conditions. Read this information
carefully and take the necessary steps to protect personnel and property.
Danger! Is used to warn of immediate hazards that will cause severe personal injury or death.
Warning! Is used to call attention to a situation that could cause severe personal injury.
Caution! Is used to call attention to a situation that could cause minor personal injury or
damage to the machine or other property.
Read all instructions before using.
General Safety Instructions
Danger! This machine emits exhaust gases (carbon monoxide) that can cause serious injury or
death. Always provide adequate ventilation when using the machine.
Warning! Be sure to follow these safety precautions to avoid situations that could cause
severe personal injury.
• This machine should only be used by properly-trained and authorized personnel.
• While on ramps or inclines, avoid sudden stops when loaded. Avoid abrupt sharp turns. Use low
speed down hills. Clean only while ascending (driving up) the ramp.
• Keep sparks, ame and smoking materials away from the battery. Explosive gases are vented
during normal operation.
• Charging the battery produces highly-explosive hydrogen gas. Charge the battery only in well-
ventilated areas away from open ame. Do not smoke while charging the battery.
• Remove all jewelry when working near electrical components.
• Turn the Key Switch off (O) and disconnect the battery before servicing electrical components.
• Never work underneath a machine without safety blocks or stands to support the machine.
• Do not dispense ammable cleaning agents, operate the machine on or near these agents, or
operate in areas where ammable liquids exist.
• To avoid hydraulic oil injection or injury, always wear appropriate clothing and eye protection
when working with or near any hydraulic system.

General Information 17Service Manual – Advance 7765 / Nilsk CR1500
• Only use the brushes provided with the machine or those specied in the Instructions for Use.
The use of other brushes may impair safety.
Caution! Be sure to follow these safety precautions to avoid situations that could cause
personal injury, damage to property or equipment damage.
• This machine is not approved for use on public paths or roads.
• This machine is not suitable for picking up hazardous dust.
• Use care when using scarier discs and grinding stones. Nilsk-Advance will not be held
responsible for any damage to oor surfaces caused by scariers or grinding stones.
• When operating this machine, ensure that individuals in close proximity are not endangered.
• Before performing any service function, carefully read all instructions pertaining to that
function.
• Do not leave the machine unattended without rst turning the Key Switch off (O), removing the
key and securing the machine.
• Apply the parking brake before exiting the Operator’s seat.
• Turn the Key Switch off (O) and remove the key before changing the brushes, and before
opening any access panels.
• Take precautions to prevent hair, jewelry or loose clothing from becoming caught in moving
parts.
• Use caution when steering and/or operating this machine in below-freezing temperature
conditions. Any water in the solution or recovery tanks, or in the hose lines could freeze, causing
damage to valves and ttings. Flush with windshield washer uid.
• Do not use on surfaces having a gradient exceeding 14.1% (8°.) in transport or 10.5% (6°) while
cleaning.
• All doors and covers are to be positioned as indicated in the instruction manual before using the
machine.
Caution! Do not pressure-wash the operator instrument panel, electrical components or the
engine compartment area.

General Information 18Service Manual – Advance 7765 / Nilsk CR1500
Hopper Safety Lock Arm (variable dump only)
To prevent the hopper from dropping
unexpectedly and causing injury, always engage
the Safety Lock Arm before working under the
hopper. The Safety Lock Arm is mounted to the
right side of the frame and swings up to align with
and support the bottom of the hopper as shown.
Warning! Never work under the
hopper without rst
engaging the Safety Lock
Arm.
After the work under the hopper is complete,
swing the Safety Lock Arm back down to its
disengaged position.
Safety Lock
Arm (shown in
engaged position)

General Information 19Service Manual – Advance 7765 / Nilsk CR1500
Jacking the Machine
Warning! Never work under a machine without safety stands or blocks to support the machine.
When jacking the machine, do so at the designated Tie Down/Jacking Locations as
shown below.
Transporting the Machine
Caution! Before transporting the machine on an open truck or trailer, make sure the machine
is tied down securely at the designated Tie Down/Jacking Locations shown below,
all access doors and covers are secured (tape and strap as needed) and the parking
brake is engaged.
The jacking and tie down locations are identied with a decal on the body panel.
Front
Jacking/Tie-down
Location
Rear
Jacking/Tie-down
Location

General Information 20Service Manual – Advance 7765 / Nilsk CR1500
Towing or Pushing the Machine
Caution! The machine’s hydrostatic wheel drive pump is equipped with a tow (bypass) valve
that opens the hydraulic circuit to the wheel drive motor. This allows the wheel drive
motor to “freewheel” when the machine is being towed/pushed short distances
without the use of the engine. The tow valve is controlled by the Tow Valve Extension
Shaft, located on top of the drive pump just in front of the engine.
Tow Valve
Extension
Shaft