Nilfisk-Advance 7765 Service Manual page 9

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