Tennant sentinel, Service Manual

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59
Sentinel 9018524 (05-2019)
MAINTENANCE
WHEEL ALIGNMENT
When the machine has been used for some time,
a number of things (large temperature swings,
continual turning in only one direction, and cylinder
leakage) can prevent the steering system from
tracking properly. The front axle is equipped with
a hydraulic valve for aligning the wheels. Wheel
alignment should be done after every 100 hours
of operation or when the machine is not tracking
properly.
To align the wheels:
1. Start the machine.
2. Slowly drive the machine forward and turn the
steering wheel completely to the right while the
machine is moving.
NOTE: It is important for the machine to be moving
while turning so that there is no wind up on the
side wall of the tires.
3. Stop the machine and set the
parking brake
switch
.
4. Remove the red valve handle from the storage
location inside the cab of the machine.
5. Place the red valve handle on the steering
valve located on the front axle.
6. Turn the handle 90° counterclockwise to open
the steering valve.
7. Release the
parking brake switch
.
8. Slowly drive the machine forward and turn the
steering wheel completely to the left and then
completely to the right while the machine is
moving.
NOTE: It is important for the machine to be moving
while turning so that there is no wind up on the
side wall of the tires.
9. Stop the machine and set the
parking brake
switch
.
10. Turn the handle 90° clockwise to close the
steering valve.
11. Remove the red valve handle from the steering
valve and return it to its storage location inside
the cab of the machine.
12. Drive the machine straight forward 30.5-61.0 m
(100 − 200 ft) to settle the system. Do not turn
the steering wheel while driving forward.
WHEEL NUTS
Check the wheel nut torque on the four wheels
every 100 hours of operation. The proper torque is
260
− 305 Nm (190 − 225 ft lb).