Chevrolet 10 Series 1970 Service Manual page 224

REAR SUSPENSION AND DRIVE LINE 4-48
F ig . 8 2 — Piston A ir - S h if t U n it Cross S e ctio n
1. S e lf-L o c k in g N u t
2. Housing
3. Push Rod
4. Compression S pring
5. A c tu a tin g Lever
6. Bushing
7. C o ve r L o c a tin g Bosses
and C over Bolts
4. In stall Tool J-8107, F igu re 84, o v e r piston bore and
clamp onto flange, in stall a 9/16" socket o v e r s e lf­
locking nut and tighten down on tool until tension is
re lie v e d on c le v is pin.
5. U nscrew T o o l J-8107 until com p ression spring ten­
sion is re lie v e d and rem ove T ool (fig . 85).
6. Push piston, push
through top of cylin d er (fig . 86).
7. R em ove actuating le v e r fro m housing.
Inspection
1. Inspect shift fo rk seal fo r good condition and tight fit
on shift fork. Check shift fo rk seal spring fo r d is ­
tortion and tension.
2. Inspect housing fo r
worn o r grooved condition. Check piston stop cushion
fo r worn o r cracked condition.
3. Inspect piston fo r a worn o r grooved condition. Check
fe lt w ipers fo r distortion . F e lt w ipers are o il soaked
8. Piston
9. " O " Ring
10. F e lt W ipers
11. Piston Stop Cushion
12. V e n t
13. C le v is Pin
14. G aske t
R em ove c le v is pin (fig . 84).
rod and com p ression spring
crack s and cylin d er b ore fo r
F ig . 83— Piston Housing C o ve r Removal or In s ta lla tio n
to insure p rop er lubrication o f the cylin d er wall.
Check " O " rings fo r worn condition.
4. Inspect com pression spring fo r distortion, tension
and other visual d efects.
tuating le v e r fo r elongated holes, worn o r cracked
conditions.
5. Inspect bearin g surface on actuating arm fo r w ear.
6. Inspect bushings in both the housing and housing
c o v e r fo r w ear.
F ig . 8 4 —C le v is Pin Removal o r In s ta lla tio n
Check push rod and a c ­
CHEVROLET TRUCK SERVICE MANUAL