Nilfisk-Advance 7765 User manual

Engine System, Gasoline/LPG 106Service Manual – Advance 7765 / Nilsk CR1500

Engine System, Gasoline/LPG 107Service Manual – Advance 7765 / Nilsk CR1500

Engine System, Gasoline/LPG 108Service Manual – Advance 7765 / Nilsk CR1500
Specications
Engine Specications
3.0 L GM
Engine type Vertical, liquid cooled, four-cylinder, push rod actuated
overhead valve, solid-state distributor
Displacement 181 cubic inches (2966 cc)
Compression Ratio 9.2:1
Fuel Gasoline 87 or 89 octane unleaded gasoline with no more than
10% ethanol by volume
LP 33-lb. tank size with manual shutoff
Spark Plugs AC Delco R45TS, gap .045” [1.14 mm]
Spark Plug Wiring Match numbered coil position to spark plug number (see the
Firing Order and Plug Wire Routing subsection)
Engine Firing Order 1-3-4-2
Ignition Timing 0 degrees BTDC
Engine Rotation CCW(ywheelend)
Valve Lifters Flat follower
Oil Capacity 4qts.[3.79L]withoutoillter
4.5qts.[4.26L]withoillter
Oil Filter PF-25 or equivalent
Minimum Oil
Pressure (Hot)
6 psi [0.41 bar] @ 1000 RPM
18 psi [1.24 bar] @ 2000 RPM
Cooling Capacity 4 qts. [3.79 L] without radiator
12 qts. [11.36 L] with radiator

Engine System, Gasoline/LPG 109Service Manual – Advance 7765 / Nilsk CR1500
Special Tools
Diagnostic Communication Cable and software, p/n 56305647
Cooling System Tool

110Service Manual – Advance 7765 / Nilsk CR1500
Hopper System
Functional Description
Overview
The hopper system holds the dust and debris swept up by the brooms.
There are two different hopper congurations; a manual dump (MD) hopper and a variable dump (VD)
hopper.
• The manual dump hopper is xed. A manual dump lever opens a hopper ap to empty the hopper onto the
oor below the machine. Machines with a manual dump hopper do not have a dust control system.
• The variable dump hopper has a hydraulic cylinder that raises the hopper for emptying into a dumpster
or other receptacle. A second hydraulic cylinder opens and closes the hopper dump door. Machines
equipped with a variable dump hopper are also equipped with a dust control system. The dust control
system includes a hopper lter, dust control motor and impeller, and lter shaker motor. Refer to the
Dust Control System section for more information on the dust control components.
Hopper – Manual Dump Machines
The Manual Dump Hopper is
xed. Moving the Hopper
Dump Handle to the OPEN
position empties the
contents of the Manual
Dump Hopper onto the oor
underneath the machine.
Note that there are no
electrical or hydraulic
components associated
with the Manual Dump
Hopper.
Manual
Dump
Hopper
Hopper
Dump
Handle

Hopper System 111Service Manual – Advance 7765 / Nilsk CR1500
Hopper – Variable Dump Machines
The Variable Dump
Hopper pivots on the Rod
supported by the frame.
The Hopper Lift Cylinder
swings the Variable Dump
Hopper up to allow it to be
emptied into a dumpster
or other receptacle.
The Hopper Dump Door
Cylinder opens and closes
the Hopper Dump Door.
The Hopper Switch (called
the “Hopper Down Switch”
in the Parts List) closes
when the Variable Dump
Hopper is fully down.
The Hopper Door Switch
(called the “Dump Door
Switch” in the Parts List)
closes when the Hopper
Dump Door is closed.
Rod
Hopper
Switch
Hopper
Door
Switch
Hopper
Dump
Door
Hopper Dump
Door Cylinder
Hopper
Lift
Cylinder
Variable
Dump
Hopper

Hopper System 112Service Manual – Advance 7765 / Nilsk CR1500
The hydraulic valves that control the Hopper Lift Cylinder and Hopper Dump Cylinder are mechanically
actuated by the Hopper Lift Lever and the Hopper Dump Door Lever respectively. Links connect the Hopper Lift
Lever and Hopper Dump Door Lever to the corresponding side of the Hopper Control Valve.
Link
To Upper Port on
Hopper Dump Door Cylinder
To Rear Port on Hopper Lift Cylinder
To Lower Port on Hopper Dump Door Cylinder
To Front Port on Hopper Lift Cylinder
From “T” Port on Main Control Valve
To Rear Oil Cooler
Hopper
Control Valve
Hopper
Lift
Lever
Hopper
Dump Door
Lever

Hopper System 113Service Manual – Advance 7765 / Nilsk CR1500
Hopper System Wiring Diagram – Variable Dump Machine
Electrical Circuit Description – Variable Dump Machine
The only electrical components associated with the hopper system are the Hopper Switch and the Hopper Door
Switch. Both of these “whisker” switches must be closed in order to get positive voltage to the Shaker Motor
Switch, Dust Control Switch, Main Broom Switch and Side Broom Switch.
Hopper Switch Hopper Door Switch
(Held Closed by Hopper) (Held Closed by Door)
7
B-
R1
Shaker Relay
Dust Control Solenoid (1)
8535 46
15
1557
15
86
1
Side Broom
Switch
2
1
Main Broom
Switch
2
1
Dust Control Switch
Option
2
337
1
Shaker Motor Switch
2
Main Broom Solenoid (2)
38
Side Broom Solenoid (5)
39
15
B-
7
7
CB6
15 A
137 2C CN.O. N.O.
1
Battery 12 VDC
+-
Bat. Ignition
Switch

Hopper System 114Service Manual – Advance 7765 / Nilsk CR1500
Hopper System Hydraulic Diagrams – Variable Dump Machine
Hopper Control Valves in Neutral Position
The hydraulic oil ows from the Auxiliary Pump, through non-priority leg of the priority ow divider, then
through the Main Control Valve to the Hopper Control Valve. Note that the oil will take this path regardless of
whether the Main Broom, Dust Control and Scrub Brush Motors are on or off.
When the Hopper Dump Cylinder Valve and Hopper Lift Cylinder Valve are in the neutral position, the oil ows
through the Hopper Control Valve, then through the Oil Cooler, Return Block and Filter to the Reservoir. Note
that the hydraulic lines from the Dump Cylinder and the bottom port on the Lift Cylinder are “deadheaded” in
the Hopper Control Valve to hold the hopper and dump door in position.
Lift Cylinder
A
CD
B
Dump Cylinder
To Scrub
Brush Motors
To Main
Broom and Dust
Control Motors
From Main
Broom and Dust
Control Motors
From Scrub
Brush Motors
.75
GPM
Main Control
Valve
P
P1
1
2
3
T
4
1.02
CIR
Return Block
Reservoir
Auxiliary
Pump
Out
Hopper
Control
Valve
In
Oil
Cooler
Filter
9.7 GPM
Main Broom
Solenoid (2)
Normal Rotation
Brush (4)
Reverse
Rotation
Brush (3)
To Side
Broom
Valve
Hopper Lift
Cylinder Valve
Hopper Dump
Cylinder Valve
To Return
Block
2500
PSI
Relief
Valve
T1

Hopper System 115Service Manual – Advance 7765 / Nilsk CR1500
Lift Hopper
When the hopper lift lever is moved to the “raise” position, the oil ows through the check valve on the
Hopper Lift Cylinder Valve and to the bottom port on the Lift Cylinder to raise the hopper. The oil from the top
port on the Lift Cylinder goes to the return line to the Filter and Reservoir.
Lift Cylinder
A
CD
B
Dump Cylinder
To Scrub
Brush Motors
To Main
Broom and Dust
Control Motors
From Main
Broom and Dust
Control Motors
From Scrub
Brush Motors
.75
GPM
Main Control
Valve
P
P1
1
2
3
T
4
1.02
CIR
Return Block
Reservoir
Auxiliary
Pump
Out
Close
Door
Lift
Hopper
Hopper
Down
Open
Door
Hopper
Control
Valve
In
Oil
Cooler
Filter
9.7 GPM
Main Broom
Solenoid (2)
Normal Rotation
Brush (4)
Reverse
Rotation
Brush (3)
Hopper Lift
Cylinder Valve
Hopper Dump
Cylinder Valve
To Side
Broom
Valve
To Return
Block
2500
PSI
Relief
Valve
T1