Chevrolet Chevelle 1977 Repair Manual page 67

Disassembly
1. Place the valve in a vise as shown and remove dust
cover (fig. 3B-71).
2. Remove adjusting nut (fig. 3B-72).
3. Remove valve to adapter bolts and remove valve
housing and spool from adapter.
4. Remove spool from the housing (fig. 3B-73).
5. Remove spring, reaction spool, washer reaction
spring, spring retainer, and seal (fig. 3B-74). "O" ring may
now be removed from the reaction spool.
6. Remove the annulus spacer valve shaft washer and
plug to sleeve key (See Figure 3B-75).
7. Remove clamp by removing nut, bolt and spacer or,
if crimped type clamp is used, straighten clamp end and pull
clamp and seal off end of stud (fig. 3B-76).
8. Carefully, so as not to nick the top surface, turn
adjuster plug out of sleeve (fig. 3B-77).
9. Remove the adapter from the vise and invert,
perm itting the spring and one of the two ball seats to fall free.
10. Remove the ball stud and the other ball seat and the
sleeve will fall free.
Inspection
1. Wash all metal parts in nontoxic solvent and blow dry
with compressed air.
2. Inspect all parts for scratches, burrs, distortion,
evidence of wear and replace all worn or damaged parts,
including mating parts when necessary.
3. Replace all seals, gaskets, covers with approved
service parts.
Repairs
NOTE:
The Corvette valve incorporates a 40 lb.
centering spring. The Corvette valve incorporating this
spring is identified by an
In case a connector seat becomes damaged, proceed as
follows:
To remove connector seat, tap threads in center hole
using a 5/16-18 tap. Thread a bolt with nut and flat washer
attached into tapped hole so that the washer rides against the
face of the port boss and the nut rides against the washer.
Fig. 3B-71--Dust Cap Removal
OVERHAUL
"C"
stamped on the dust cover.
STEERING
OPERATIONS
Hold the bolt from rotating while turning the nut off the bolt.
This will force the washer against the port boss face and will
back out the bolt thus drawing the connector seat from the
top cover housing (fig. 3B-78). Discard the connector seat.
Clean the housing out thoroughly to remove any tapping
chips.
Drive new connector seat against housing seat, using
Tool J-6217, being careful not to damage either the connector
seat or the housing seat (fig. 3B-79).
Assembly (Fig. 3B-81)
1. Replace the sleeve and ball seat in the adapter, then
the ball stud, and finally the other ball seat and the spring,
small coil down.
2. Clamp the adapter in vise, put the shaft through the
seat in the adjuster plug and screw adjuster plug in sleeve (fig.
3B-80).
3. Turn the plug in until it is tight, then back it off until
the slot lines up with notches in the sleeve.
4. Install new seal and clamp over stud so lips on seal
mate with clamp. (A nut and bolt attachm ent type clamp
replaces the crimped type for service fig. 3B-76).
5. Center the ball stud, seal and clamp at opening in
adapter housing, then install spacer, bolt and nut.
6. Insert the key, making sure that the small tangs on
the ends of the key fit into the notches in the sleeve (fig.
3B-82).
7. Install the valve shaft washer, annulus spacer, and the
reaction seal (lip up), spring retainer, reaction spring and
spool, washer and adjustm ent spring. (Install "O" ring seal
on reaction spool before installing spool on shaft.) Install the
washer with the cham fer "up".
8. Install the seal on the valve spool (lip down), then
install spool in housing being careful not to jam spool in
housing.
9. Install housing and spool onto adapter. The side ports
should be on the same side as the ball stud. Bolt the housing
to the adapter.
10. Depress the valve spool and turn the locknut onto
the shaft about four turns with a clean wrench or socket.
Fig. 3B-72--Removing A djustin g Nut
3B-25