Tennant 365, Operator'S Manual

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MAINTENANCE
3-39
365 MM173 (3---90)
VACUUM FAN AND MAIN BRUSH SHUT-OFF
SWITCH
The vacuum fan and main brush shut-off switch
stops the vacuum fan and main brush whenever the
hopper is raised. The switch roller rides on the back
of the hopper. When the hopper is raised, the switch
looses contact with the hopper and stops hydraulic
flow. Adjust the switch position after adjusting the
hopper or if the vacuum fan and main brush do not
stop when the hopper is raised.
A
B
03724
SHUT-OFF SWITCH
A. Switch
B. Switch Roller
DEBRIS HOPPER
The debris hopper collects all of the debris swept up
by the machine. The hopper has four areas of
adjustment. The adjustments are: hopper lift linkage,
hopper stops, arm lock bracket, and hopper
centering. All of the adjustments have been made at
the factory and require no regular maintenance. In
the event that the hopper components are repaired
or replaced, the hopper must be readjusted for best
performance.
The hopper adjustments must be made in the order
specified. Make all adjustments with the engine off
and parking brake set. If the adjustments are made
with the hopper raised, be sure to engage the
hopper safety support bar.
TO ADJUST HOPPER
NOTE: Empty the debris hopper and temporarily
remove the hopper lift linkage side panels before
making adjustments.
A. HOPPER LIFT LINKAGE
1. Stand clear and cycle the hopper up and
down. Watch for signs of binding,
sloppiness, or misalignment of the lift arm
linkage. Reshim to remove binding,
sloppiness, or misalignment of the linkage
as necessary.
WARNING: Stay clear of hopper lift arms
when they are in motion.
B. HOPPER STOPS
1. The two top hopper stop bolts, one on
each side, prevent the lift cylinders from
over extending. Adjust the stop bolts so
the lift linkage stops against the bolts and
still allows the hopper to raise to the
required height.