Motrec T-448HD, Operator And Maintenance Manual

Page: 12 / 51

Maintenance
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ACCELERATOR
GEAR
−
Remove the cover.
−
Backlash between gears must be reduced to a minimum by sliding holder; use locktite 262
to lock the three screws.
−
When the plastic gear is fully depressed a small backlash must remain between the gears.
−
When the plastic gear is released its rear portion must not exceed the pedal case.
MICRO-SWITCH
The micro-switch must deactivate the on/off solenoid when the accelerator is released; turn the
adjusting screw (shown on figure below) to adjust the micro-switch height.
POT
−
Remove the terminals 2 and 3 on PMC to measure resistance signal.
−
When the micro-switch is activated the signal must be less than 50 ohms. When the front
portion of the pedal is fully depressed the signal must be more than 4600 ohms.
−
To modify the resistance, turn the adjusting screw to change the micro-switch height (see
figure below).
Proceed with the same verifications after the accelerator cover is on and then connect terminals 2 and 3.