Chevrolet 30 Series 1967 Service Manual page 267

Fig. 83—G o ve rn o r—Cross Section
2. Position return spring and non-pressure plate on
push rod.
3. P ress the non-pressure plate down against the ten­
sion of the spring until the plate bottoms on the flat
surface.
4. Now clamp the push rod at the non-pressure plate in
a vise or with vise grip pliers whose grips have been
taped or covered.
5. With the push rod held in this manner, place the
clamp ring over the clamping surface of the non­
pressure plate.
. Position diaphragm in pressure plate and joint the
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two with the non-pressure plate by working the clamp
1 2 3 4 5
U l i X A
1. C o ver
2. Retaining Ring
3. Adjusting Screw Lock N ut
4. Upper Spring Seat
5. Pressure Setting Spring
GOVERNOR (Figs.82 and 83)
Removal
following procedure will apply:
Disassembly (Fig. 84)
10. Remove the two piston grommets and with a hooked
11. Clean or remove the unloader and reservoir port
Cleaning and Inspection
1. Clean all metal parts in cleaning solvent.
2.
3. Inspect body for cracks or other damage. Be partic­
8 9 10
Fig. 84—G o ve rn o r—Exploded V ie w
6. Lower Spring Seats
7. Spring G u id e
8. Adjusting Screw
9. Exhaust Stem
10. Exhaust Stem Spring
ring over the clamping surface of the pressure plate
with the use of vise grip pliers or like tool drawing
the clamp lugs together.
7. Assemble bolt and nut in clamp. It is sometimes
necessary to tap the clamping ring to center it, and
this should be done only with a soft faced mallet.
. Release hold on push rod and install remaining clamp
8
ring nut and bolt.
9. Tighten the clamp ring nuts and bolts evenly and only
sufficiently to eliminate leakage.
If it is necessary to remove or install a governor, the
1. Drain air brake system.
2. Disconnect air lines at governor.
3. Remove governor mounting b o l t s
governor.
1. Remove all dirt or grease from exterior of governor,
using cleaning solvent and a brush.
2. Unscrew the top cover.
3. Remove the spring assembly retaining ring.
4. Remove the adjusting screw and spring assembly.
5. Remove the lock nut, then the hex-shaped upper
spring seat from the adjusting screw.
. Remove the pressure setting spring, lower spring
6
seat, spring guide and the other lower spring seat
from the adjusting screw.
7. Remove the exhaust stem and its spring from the top
of the piston.
. With the body in the inverted position, tap it lightly
8
to remove the piston.
9. Remove the inlet and exhaust valve spring and the
valve from the piston.
wire. Remove the exhaust stem grommet.
filters.
Wipe clean all rubber parts.
ularly careful that all air passages in the body,
1 1 1 2 13 14 15 16
11. Washer
12. Grommet
13. Grommet
14. Piston
15. Grommet
BRAKES 5-53
and r e m o v e
19
17 1
16. In let and Exhaust V a lv e
17. Inlet-Exhaust V a lv e
Spring
18. Body
19. Filters
CHEVROLET TRUCK SERVICE M ANUAL