CLUTCHING
4.7
Drive Clutch Spring Data
PART NUMBER COLOR CODE WIRE DIAMETER FREE LENGTH +/-
.125s
Force lbs. @
2.50”--1.19
(+/-- 12lbs.)
7041021 Clear .157s 4.38s 70--130
7041022 Black .140s 4.25s 44--77
7041063 Purple .168s 4.37s 75--135
7041062 Silver .208s 3.12s 75--243
7041065 Pink .177s 4.69s 112--200
7041060 Orange .196s 3.37s 70--199
7041080 Blue/Gold .207s 3.50s 120--300
7041083 Red .192s 3.77s 120--245
7041102 Yellow .192s 2.92s 44--185
7041061 Brown .200s 3.06s 69--212
7041132 White .177s 2.92s 34--141
7041168 Green .177s 3.05s 42--142
7041148 Gold .207s 3.25s 100--275
7041150 Red/White .192s 3.59s 100--220
7041286 Silver/Gold .218s 3.05s 77--240
7041080 Blue .207s 3.55s 120--300
7041526 Dark Blue .218s 3.52s 120--310
7041781 Dark Blue/White .225s 3.52s 120--310
7041566 Almond .207s 3.65s 140--330
7041645 Almond/Gold .207s 4.00s 150--290
7041818 Black/White .218s 3.52s 140--320
7041816 Almond/Black .200s 3.75s 165--310
7041922 Almond/Blue .218s 3.75s 150--310
7041988 Almond/Red .207s 4.29s 165--310
7042083 Black/Green .218” 3.38” 120--340
CAUTION:
Never shim a drive clutch spring to increase its compres-
sion rate.
This may result in complete stacking of the coils
and subsequent clutch cover failure.
Maximum efficiency of the variable speed drive system is
dependent upon many factors. Included in these are
converter offset and alignment, belt tension, belt to
sheave clearance, and internal condition of the drive and
driven clutch components. One of the most critical and
easily serviced parts is the drive clutch spring. Due to the
severe stress the spring is subject to during operation, it
should always be inspected and checked for tolerance
limits during any clutch operation diagnosis or repair.
With the spring resting on a flat surface, measure free
length from outer coil surfaces as shown. Refer to the
chart above for specific free length measurements and
tolerances.
In addition to proper free length, the spring coils should be
parallel to one another when placed on a flat surface. Dis-
tortion of the spring indicates stress fatigue. Replace-
ment is required.
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