Chevrolet 70 1969 Series, Shop Manual

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T R A N SM ISSIO N S A N D CLUTCHES 7D-31
1 Bleeder Valve
2 Fluid Entry Port
3 Cylinder Body
4 Push Rod Boot
5 Push Rod
6 Piston Retaining Ring
7 Piston
8 Piston Seals
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Figure 17— Clutch Slave Cylinder (Typical!
D ISASSEM BLY
N O T E : Key numbers in text refer to Figure 17.
1. Remove cylinder push rod (5) and push rod
boot (4) from cylinder.
2. Remove piston retaining ring (6) from slave
cylinder, using a small screwdriver.
C A U T IO N : Do not mar bore of cylinder body.
3. Remove piston assembly (7) with seals (8j
from cylinder body (3).
N O T E : Piston can be jarred from body or small
amount of air pressure at line fitting will force
piston from bore. Do not allow piston to become
damaged alter it is removed.
4. If seals (8) are in good condition they
need not be removed.
INSPECTION
N O T E : Key numbers in text refer to Figure 17.
1. Inspect slave cylinder bore, making sure
that it is smooth. A scored or damaged cylinder
body (3) must be replaced.
N O T E : Burrs at the bore side of inlet port can
be removed by honing or by use of crocus cloth.
2. Check piston seals (8) if removed. Swelling
of seals could be due to use of improper brake
fluid.
3. Check fit of the piston in the cylinder bore,
using a feeler gauge. This clearance should be
from 0.002" to 0.004".
A S S E M B L Y
N O T E : Key numbers in text refer to Figure 17.
1. Install seals (8) into grooves of piston (7)
with lips of seals positioned to fluid end of piston
(fig. 19).
2. Dip piston and seals in clean brake fluid,
then carefully install piston assembly in bore of
cylinder. Refer to figure 19 for proper position of
piston in cylinder.
3. Install retaining ring (6) in groove at open
end of cylinder.
4. Install boot (4) over push rod (5) and install
rod and boot to slave cylinder.
IN S T A L L A T IO N
1. Bolt slave cylinder assembly to mounting.
2. Adjust slave cylinder push rod clearance
as outlined in this section under "Clutch Control
Adjustments."
3. Attach hydraulic line to slave cylinder and
bleed air from system at slave cylinder bleed fit­
ting. See "Bleeding System” previously in this
section.
N O T E : Clutch Troubleshooting information is
covered at rear of " C L U T C H E S ” (SEC. 7E).
CHEVROLET SERIES 70-80 H EAVY DUTY TRUCK SH O P M A N U A L