Operating the Ice Resurfacer
7 - 2
Hydrostatic Transmission
The hydrostatic transmission is an innitely variable hydraulic pump and motor combination.
The machine's speed and direction of travel are selected with the acceleration foot pedal
(Figure 7.1). The transmission must be in neutral for starting the engine (foot off of the
accelerator pedal).
The machine is equipped with a neutral start safety switch which prevents the engine from
starting if the hydrostatic pump is not in neutral. Do not put your foot on the accelerator
pedal when starting the machine. The neutral start safety switch may be activated resulting
in a "no-start" situation.
Engine Speed
This machine is equipped with an electronic governor. The engine speed is controlled via an
engine speed switch (See Figure 6.2). The engine speed is increased by pushing the right side
of the rocker switch. The engine speed is decreased by pushing the left side of the switch.
The electronic governor maintains the engine RPM independent of the load of the engine.
See your 445 Service Manual for more details on the electronic governor. When resurfacing,
the engine speed should be set between 2200 and 2500 RPM. The operator must not "lug"
the engine by operating with the engine RPM set too low. This will impair the operating
and resurfacing performance and may damage the engine.
Vehicle Speed
The direction of travel for the ice resurfacer is determined by the tilt of the accelerator pedal
as indicated in Figures 7.1 and 7.2. The engine speed should be maintained near 1500 RPM
for travel and between 2200 and 2500 RPM for resurfacing.
The speed of the vehicle is controlled by the combination of engine RPM and the how far
the accelerator foot pedal is depressed.
Accelerator Foot Pedal
The accelerator foot pedal activates the hydrostatic transmission. Depress the foot pedal
and the machine will travel in the direction selected. The foot pedal controls the amount of
power applied from the transmission. Full pedal travel will produce full speed, maximum
acceleration, etc. Lifting your foot from the foot pedal will slow the amount of power
delivered from the transmission and will slow the machine. The hydrostatic transmission
will act as a braking system when you lift your foot from the pedal. You can also apply the
foot brake.
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