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26
FIGURE 3
VACUMOTIVE DRIVE SOLENOID - PAGE 8-16
Add the following note: To improve operation of
the clutch power unit, the Vacumotive Drive sole-
noid body check valve made of bakelite has been
cancelled and replaced by a new valve consisting of
rubber molded on a brass disc Part No. 302753.
The new valve went into production on August
18, 1949 on 6 cylinder models and September 19,
1949 on 8 cylinder models.
To check for solenoid valve leakage; short out coil
primary circuit or pull out center distributor wire;
clutch unit should release slowly approximately 7
seconds. If clutch unit drops back suddenly it indi-
cates a faulty solenoid or a leaking solenoid valve
seat.
CLUTCH POWER CYLINDER - PAGE 8-16
REMOVAL:
1. Disconnect power unit air intake pipe and the
pipe from intake manifold to clutch power unit
solenoid.
2. Remove the valve lever eccentric bushing nut and
pull the clutch unit bellcrank lever an d compen-
sator out to allow clearance for removal of the
piston valve and rod link.
3. Remove the cotter pin at the piston valve and rod
link pin and disconnect lever link from bellcrank.
4. Remove piston rod pivot bolt (23).
5. Remove two bolts attaching clutch unit solenoid
to the clutch power unit cylinder and remove
clutch unit solenoid.
6. Remove pal nut, nut and bolt attaching clutch
power cylinder to mounting bracket and remove
clutch power unit, piston rod and piston valve rod
and link as a complete unit for disassembly and
overhaul.
INSTALLATION:
Reverse procedure of removal and recheck piston
valve rod adjustment, Adjustment No. 8. 480-490
Procedure Manual.
CLUTCH POWER CYLINDER
MOUNTING BRACKET
REMOVAL:
1. Remove two nuts, washers and bolts attaching
rear of bracket to throttle bell-crank bracket.
2. Disconnect power air intake pipe assembly and
vacuum pipe at clutch power unit solenoid.
3. Remove two bolts attaching clutch power u n i t
mounting bracket to support bracket and one bolt
attaching mounting bracket to throttle cross rod
mounting bracket.
4. Remove palnut, nut and bolt attaching clutch
power cylinder to mounting bracket.
5. Pull complete bracket towards fender to allow for
removal of the cotter pin, flat washer, one small
and one large spacer washer and spring washer
attaching bell-crank support pin to mounting
bracket.
6. Slide out bracket toward engine and remove.
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