© 2014-2015 Minuteman International, Inc.
Nautilus Hi-Dump Rider Scrubber/Sweeper #988752UM Rev. * 03/16
Page 66
PREVENTATIVE MAINTENANCE
HYDROBACK
MOUNT
ADJUSTER PLATE
LOCK NUTS
HYDROBACK MOUNT
ADJUSTMENT BOLTS (2)
HYDROBACK
PROPULSION
PUMP
HYDROBACK
ADJUSTER PLATE
Fig. 1: Hydroback Propulsion Pump
Adjusting the Propulsion Pump Neutral Setting
If the machine does not remain in neutral when the foot
pedal is released the following adjustment is necessary.
WARNING
Before staring the engine raise the front of the
machine with a suitable fl oor jack so that the drive
wheel is lifted off the fl oor. This will ensure that the
machine will not move forward or backward while the
neutral setting is being adjusted!
1. Raise the front of the machine with a suitable fl oor jack so
that drive wheel is off the fl oor.
2. Slightly loosen the two bolts holding the Hydroback
adjuster plate to the Hydroback mount so that the plates
remain in contact but the adjuster plate can move.
3. Start the engine and position the throttle switch to the
high speed position.
4. Push the directional control pedal in the forward direction
and release, then push the pedal into reverse and
release.
5. Note the direction that the drive wheel is rotating when
the directional control pedal released.
6.
If the drive wheel rotates in the forward direction:
Slowly turn the lock nuts located on either side of the
Hydroback adjuster plate so that the adjuster plate is
moved to the right.
7.
If the drive wheel rotates in the reverse direction:
Slowly turn the lock nuts located on either side of the
Hydroback adjuster plate so that the adjuster plate is
moved to the left.
