Hand Lover Pressure
*Twin Disc Clutch
clutch release shaft (Fig. 11), is obtained as shown in
When properly adjusted, the approximate pressure
required at the outer end of the hand lever to engage
the various diameter clutches is shown in the table.
These specifications apply only with the hand lever
which is furnished with the power take-off.
A suitable spring scale may be used to check the
pounds pressure required to engage the clutch.
However, a more accurate method of checking the
Fig. 11. Checking Clutch Adjustment with a Torque
,clutch adjustment is with a torque wrench as shown in
Wrench and Adaptor
Make a final clutch adjustment with the engine running
To fabricate an adaptor, saw the serrated end off of a
clutch hand lever and weld a 1-1/8" nut (across the hex)
on it as shown in Fig. 11. Then saw a slot through the
1. Start the engine and operate it at idling speed
(approximately 500 rpm) with the clutch disengaged.
The speed will be sufficient to move the segments out to
When checking the clutch adjustment with a torque
the operating position.
wrench, engage the clutch slowly and note the amount
2. Check the pounds pressure required to engage the
of torque immediately before the clutch engages (goes
clutch. The engagement pressure should be the same
over center). The specified torque is shown in Table 1.
as that following the adjustment. If the clutch engages
at a lower pressure, the adjustment was probably made
CAUTION: The thrust load on the bronze
against the unworn portion of the facing.
clutch release bearing should be kept at an
3. Stop the engine and readjust the clutch, making sure
absolute minimum. Therefore, the hand
all disc segments are properly positioned. Install the
lever should be positioned on the shaft as
inspection hole cover.
near the 12 o'clock or 6 o'clock position as
possible. The 9 and 3 o'clock positions are
to be avoided.
The Torqmatic converter is a self contained unit which
manual input disconnect clutch, and an accessory drive
transfers and multiplies the torque of the prime mover.
This unit transmits the power through the action of oil
Check the oil level daily. If the converter is equipped
instead of through gears and in addition to multiplying
with an input disconnect clutch, additional checks and
the torque also acts as a fluid coupling between the
service will be necessary daily or at intervals determined
engine and the equipment to be powered.
by the type of operation.
The converter will automatically adjust the output torque
Adjust the disconnect clutches as outlined under power
to load requirements.
take-off clutch adjustment.
Contact an authorized Detroit Diesel Allison Service
with features such as: an automotive or industrial flange
on the shaft, a hydraulically operated lock-up clutch, a