Hydraulic Motors; To Replace Vacuum Fan Motor - Tennant ATLV 4300 Service Manual

HYDRAULICS

HYDRAULIC MOTORS

The vacuum fan impeller is driven by a hydraulic
motor located on top of the hopper cover. The
vacuum fan motor is controlled by a solenoid
valve located on the machine frame.
The steering wheel motor is used to provide
hydraulic flow to the steering cylinder.
The drive wheel motors propel the machine
forward and reverse. The propel pump provides
hydraulic flow to the drive motors.

TO REPLACE VACUUM FAN MOTOR

FOR SAFETY: Before Leaving Or
Servicing Machine; Stop On Level
Surface, Set Parking Brake, turn off
machine, and remove key.
NOTE: Anytime hopper or vacuum system parts
are serviced the seals should be inspected and
replaced if necessary.
1. Remove the six screws holding the vacuum
fan motor cover plate to the top of the
plenum assembly on top of the hopper
cover. Remove the plate.
NOTE: Observe hydraulic cleanliness
requirements when opening hydraulic lines.
2. Mark, disconnect, and plug the hydraulic
lines leading to the vacuum fan motor.
3. Open the hopper cover and tilt the hopper
back.
4. Go under the hopper cover and remove the
six hex screws holding the cover assembly
to the hopper cover. Remove the cover
assembly.
5. Locate the vacuum fan impeller screen.
Remove the three flat head screws and one
hex screw holding the screen to the impeller.
6. Pull the impeller screen, spacer, and sleeve
off the vacuum fan motor shaft.
7. Remove the four hex screws holding the
vacuum fan assembly retainer plate to the
bottom of the hopper cover.
8. Go to the top of the hopper cover and
remove the vacuum fan assembly from the
machine. Set the assembly up side down on
a flat surface.
5-12 ATLV 4300 330495 (10- -98)