Nilfisk-Advance 7765 Service Manual page 134

Service Manual – Advance 7765 / Nilfisk CR1500
Drive Pump After Machine Serial Number 1000034942
The
Drive Pump
on machines after
serial number
1000034942 is part
number 56514943.
Forward/Reverse Controls
The forward/reverse controls connect the foot (drive) pedal to the swash plate linkage on the drive pump.
Pressing the foot pedal changes the angle of the swash plate inside the drive pump.
• The direction in which the swash plate is moved determines which port on the drive motor receives the
hydraulic oil. This determines the machine direction.
• The distance to which the swash plate is moved determines the volume of hydraulic oil to the drive motor.
This determines the machine speed.
Note that the forward/reverse controls for the GM and Mitsubishi engines are different. The forward/reverse
controls also vary depending on which model drive pump is installed (part number 7-60-05026 before serial
number 1000034942, or part number 56514943 after serial number 1000034942).
From Squeegee
Vacuum Fan
Motor
To Front
Port on Rear
Wheel Motor
To Return
Block/Manifold
New Location
of Case Drain
To Rear Port on
Rear Wheel Motor
Wheel System, Traction
Drive Pump
p/n 56514943
To Return
Block/
Manifold
239