CAT: 8612 November 2019
Page 117
OPERATING INSTRUCTIONS
CLUTCH OPERATION
STARTING
To properly put a vehicle into motion, depress the clutch pedal until the
clutch brake is contacted. This contact should occur 25mm or less from
the floorboard - excluding carpet. Select a gear low enough to allow the
vehicle to start forward with throttle at idle until the clutch is fully engaged.
This procedure is especially important with ceramic or metallic-faced
clutches. Do not ‘feather’ or attempt to slip the clutch to start in a higher
gear, even if load conditions are light. Any slippage of a ceramic or metal-
faced clutch will result in very aggressive engagement and a very jumpy
start. Also, do not allow the vehicle to roll at all in the opposite direction
during clutch engagement. The service brakes may be used to accomplish
a start from a full stop.
Once the vehicle is moving, do not attempt to use the clutch brake. The
clutch brake provides a means of stopping the transmission so that the
shift into a starting gear may be accomplished with ‘raking’.
Once the vehicle is in motion, use of the clutch brake will try to stop the
vehicle, resulting in very short service life of the clutch brake.
Release Bearing Wear
Whenever the engine is idling for any period of time, shift transmission
to neutral and disengage the clutch to prevent unnecessary wear of the
clutch release bearing.
Riding the Clutch
DO NOT use the clutch pedal as a foot rest, or drive with your foot resting
on the clutch pedal. This allows the clutch to slip, which in turn causes
excessive heat, wear and possible damage.
Clutch Adjustment
Manual and self-adjusting clutches must be inspected periodically to
maintain correct adjustment (see Maintenance Schedule for recommended
interval).
Drivers of new vehicles should carefully note free travel clearance during
the first few hundred kilometres. As clutch lining wears, free travel
decreases. Any high spots on the new clutch will quickly wear smooth,
causing free travel to diminish more rapidly than usual.
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