CAT: 8612 November 2019
Page 113
OPERATING INSTRUCTIONS
OPERATING THE TRANSMISSION
Because each Kenworth is custom-equipped, the specific operating
procedures for your particular transmission are not included in this
handbook. Therefore, you should read the general guidelines and
instructions that follow, and read the specific instructions contained in the
transmission manufacturer’s Driver/Operator’s Instruction Manual.
Transmission Warm-Up
To warm up the transmission lubricating oil during engine warm-up, check
that the transmission is in NEUTRAL and release the clutch pedal. This
will allow the transmission counter-shaft to turn and agitate the oil, thereby
warming it. This practice is particularly desirable in cold weather operation
when sluggish shifting may be experienced.
Operating Manual Transmissions
You will find a shift pattern diagram in the cab. Check to be sure that you
know the correct sequence for your particular transmission. A decal with the
shift pattern and operating instructions is normally located on the sunvisor.
PUTTING THE VEHICLE IN MOTION
After making sure the vehicle’s oil and air pressure are correct and all other
parts and systems are in proper working condition:
1. Fully depress the clutch pedal (for manual transmission) until
the clutch brake makes contact. The contact will occur at about
25mm to 40mm or less from the floorboard:
• The total stroke of the clutch pedal is approximately 254 mm. The
first 13mm is free travel. After the free travel comes the release
stroke, which is the part that fully releases the clutch. The last
25mm to 40 mm engages the clutch brake (see page 275).
Always use first gear or a low speed range to start the vehicle in
motion. The use of a higher gear or speed range forces undue strain
on the engine, clutch and other transmission components, and may
cause damage.
2. Evaluate the road surface conditions and terrain your vehicle is
on. Select a gear low enough to let your vehicle start forward
with the throttle at idle.
Summary of Contents for T410
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