GMC 1976 ZEO 6083 Maintenance Manual page 473

10 . With throttle in closed position, check lower
feed wire at transmission downshift switch .
a. If test light fails to light, replace transmis-
sion downshift switch . Recheck system .
CLUTCH PARTS
ON VEHICLE SERVICING
FLUSHING OIL COOLER
The oil cooler is located in the side tank of the
radiator and its purpose is to cool the oil in the event
excessive temperature tends to develop. (figure 13)
In a major transmission failure, where particles
of metal have been carried with the oil throughout
Figure 13-Oil Cooler and Lines
TRANSMISSION 7- 2 5
b. If test light lights, it will be necessary to
locate the short in the wiring . Test the circuit from
the lower wire at the downshift switch to the battery.
the units of the transmission . It will be necessary to
flush out the oil cooler and connecting lines. The oil
cooler is a sealed container providing a passage for
oil to flow from the inlet to the outlet . Clean solvent
can be flushed through the cooler with air pressure.
(An engine desludge gun may be used .) The cooler
should be back-flushed first through the return line
to remove all foreign material possible. Then flush
through the inlet line and finish by flushing through
the return line . Clean remaining solvent from cooler
with compressed air applied to the return line and
flush with transmission fluid.
LINKAGE ADJUSTMENT (FIGURE
14)
CAUTION: Block vehicle wheels and apply
parking brake before attempting transmis-
sion linkage adjustment.
1 . Place steering column shift lever in neutral
against stop in column, (a detent will hold it there) .
2. Loosen relay rod clamp screw.
No. of Flat No . of Waved
Steel Clutch Steel Clutch
Clutch Plates Plates
Forward Clutch . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1
Direct Clutch . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . .
5
1
Intermediate Clutch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 -
*Clutch Plate Dished
No. of Clutch No . of Piston
Composition Release
Clutch Plates Springs
Forward Clutch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 16
Direct Clutch . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 14
Intermediate Clutch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 6