DETROIT DIESEL
Engine Equipment
Clutch
Hand Lever
Pressure
Torque
Diameter
Length
PSI
kPa
lb-ft
Nm
8"
15 1/2"
55
379
56-63
76-85
10"
15 1/2"
87-94
80
552
113-127
*11 1/2"
15 3/8"
100
689
129
175
11 1/2"
20"
105
724
112-120
152-163
*Twin Disc Clutch
TABLE 1
clutch release shaft (Fig. 11), is obtained as shown in
Table 1.
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
clutch adjustment is with a torque wrench as shown in
Torque Wrench and Adaptor
Fig. 11.
Make a final clutch adjustment with the engine
To fabricate an adaptor, saw the serrated end off of a
running as follows:
clutch hand lever and weld a 1-1/8" nut (across the
hex) on it as shown in Fig. 11. Then saw a slot
1. Start the engine and operate it at idling speed
through the nut.
(approximately 500 rpm) with the clutch disengaged.
The speed will be sufficient to move the segments out
When checking the clutch adjustment with a torque
to the operating position.
wrench, engage the clutch slowly and note the amount
of torque immediately before the clutch engages (goes
2. Check the pressure required to engage the clutch.
over center). The specified torque is shown in Table 1.
The engagement pressure should be the same as that
following the adjustment. If the clutch engages at a
CAUTION: The thrust load on the bronze clutch
lower pressure, the adjustment was probably made
release bearing should be kept at an absolute
against the unworn portion of the facing.
minimum. Therefore, the hand lever should be
positioned on the shaft as near the 12 o clock or
3. Stop the engine and readjust the clutch. making sure
6 o clock position as possible. The 9 and 3
all disc segments are properly positioned. Install the
o clock positions are to be avoided.
inspection hole cover.
TORQMATIC CONVERTERS
The Torqmatic converter is a self contained unit which
lock-up clutch, a manual input disconnect clutch, and
transfers and multiplies the torque of the prime
an accessory drive for either a governor or tachometer.
mover. This unit transmits the power through the
Check the oil level daily. If the converter is equipped
action of oil instead of through gears and in addition
with an input disconnect clutch, additional checks and
to multiplying the torque also acts as a fluid coupling
service will be necessary daily or at intervals
between the engine and the equipment to be powered.
determined by the type of operation.
The converter will automatically adjust the output
torque to load requirements.
Adjust the disconnect clutches as outlined under power
take-off clutch adjustment.
T h e r e are various combinations of Torqmatic
converters with features such as: an automotive or
Contact an authorized Detroit Diesel Allison Service
industrial flange on the shaft, a hydraulically operated
Outlet for service on Torqmatic converters.
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