Buhler 535 Lawn Mower User Manual


 
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Section 3 - Operation
Tractor Operation
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CRUISE
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Tractor Operation
Hand Throttle Control Lever
The tractor is equipped with a hand throttle, located
on the right console. Rated operating speed is 2100
RPM. Idle speed is 875 RPM. High idle no load speed
is 2225 RPM.
To increase engine speed, move the lever (1) forward
(rabbit). Pulling the lever backward will reduce engine
speed (turtle).
Fuel consumption can be reduced by operating at
lower engine speeds under light load.
Decelerator Pedal
At the lower front of the right console is the decelerator
pedal (4) which can be used to reduce engine speed
when turning or while shifting. When fully depressed,
engine speed will drop to 1400 RPM. If the pedal
is not fully depressed, engine speed will be reduced
proportionally. When the pedal is released, engine
speed will return to the previous throttle setting.
IMPORTANT: Do not release the decelerator before
completing the turn. If the transmission is in a high
gear, the tractor will accelerate quickly, reducing the
time to correct tractor direction.
Cruise Control Operation
Cruise control automatically keeps the engine speed
at a specified RPM. Two switches control cruise mode
operation. The “CRUISE/OFF” button (2) enters and
exits cruise mode. The “+/–(SET)” button (3) adjusts
the cruise setting.
When cruise mode is activated, the engine returns to
the last cruise setting, if possible, based on throttle
lever position.
The cruise function can be set to any engine RPM
between idle and high idle, but the operating cruise
RPM cannot exceed the RPM set by the hand throttle.
For example, if the cruise setting is 1800 RPM but
the hand throttle is at a normal 1700 RPM position,
cruise will not increase the RPM above 1700 RPM.
Operating cruise RPM always stays about 100 RPM
under the normal throttle RPM setting.
Setting - Move the throttle handle higher than the
desired cruise setting and press the “CRUISE” button
(2) to enter cruise operation.
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The engine cruise will not engage unless the throttle
lever is set to a higher operating speed than the cruise
set point. The engine speed will remain at the cruise
setting RPM.
Adjust the cruise setting with the “+/–(SET)” button
(3). Set the cruise mode with the throttle lever at
Full Throttle (throttle lever fully forward) whenever
possible. Cruise function will disengage if the cruise
RPM is set to a value equal to the throttle position
RPM, moving the throttle to a higher position will
return cruise function.
The “+/–(SET)” button will change the setting 10
RPM per momentary push. When the button is held
down, the RPM will continue to move up or down.
However, the dash RPM display will not keep up with
RPM changes when the button is held down. In this
case, it is advisable to estimate the setting by ear, wait
for the dash to catch up, and fine tune the RPM using
momentary pushes.
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