Kenworth T410, Руководство водителя

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Page 274 CAT: 8612 November 2019
PREVENTIVE MAINTENANCE
Make sure both of the button head socket screws that mount the master
cylinder to the fire wall/clutch pedal assembly are started in their threads
before final torque to avoid damaging the threads in the aluminum clutch
pedal casting.
Always maintain a minimum of 0.5 mm clearance between the push rod
of the clutch pedal and the hydraulic master cylinder piston. Equipment
damage may occur if this clearance is not properly maintained.
Do not allow brake fluid to spill or come in contact with painted surfaces.
In case of contact, flush the area with water.
Free pedal is the distance the clutch pedal moves by applying only slight
pressure. During free pedal, the release yoke in the transmission moves
until its bearing pads contact the release bearing. This movement of the
release yoke is called free travel. Thus, free pedal and free travel are
directly related to each other.
As the clutch pedal is depressed further with harder pressure, the release
yoke moves the release bearing away from the engine. This causes the
clutch plate to release from the driven discs in the clutch. This is called
release travel.
And, finally, as the pedal is pushed to the last 25mm to 40mm of travel, the
release bearing contacts and engages the clutch brake. This is called clutch
brake squeeze. When the clutch wears, the release bearing gradually
moves toward the engine, decreasing free pedal and free travel.
When all free pedal and free travel are gone, the clutch requires adjustment.
MANUAL CLUTCH ADJUSTMENT - NORMAL WEAR
Clutch pedal free travel is normally 13mm. This should be your guide to
determining if clutch adjustment is necessary. The clutch pedal will need
adjustment when your clutch pedal stroke seems to get longer and its
effectiveness at a seemless shift becomes less.
Another sign of the clutch needing adjustment is the level of fluid in the
reservoir. If the hydraulic brake fluid is not leaking but the fluid level is
getting lower, then the clutch may need adjusted. You should have an
authorised Kenworth dealer adjust the clutch before pedal free travel is
reduced to the minimum allowable 13mm.