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