Chevrolet 1977 10 Series, Руководство по ремонту, Страница: 267 / 468

AUTOMATIC TRANSMISSION (200)7A-31
THRUST
WASHER
PUMP ASSEMBY
PUMP BODY
PUMP DR IVE GEAR
(ID E N T IFIC A TIO N MARKS ON
TANGS UP)
PUMP
DRIVEN
GEAR
Fig. 7A-1 27 A-- Re movin g or In s t a ll in g T h r u s t W a s h e r from
Pum p
5. Inspect spring and guide for damage or distortion.
6. Inspect pressure regulator valve for free operation
in bore.
CAUTION: Do not drop the check ball that is in
the pump, as the pum p body and pump cover are
separated.
1.
Remove pum p cover to pum p body attaching bolts
and separate pum p cover from pum p body.
Pump Body
Inspection
1. Remove the 7.14mm (.281") check ball from the
pum p body or pump cover and keep it separated from the
five 6.35mm (.250") check balls used in the case and control
valve assembly.
2. Remove drive gear and driven gear from pum p body
(Fig. 7A-129A).
3. Inspect drive and driven gears for scoring, galling
or damage.
NOTE:
Driven gear identification marks should have
been against the pum p body gear pocket. (See Fig. 7A-
133A for identification.) The drive gear has 1
identification m ark on each drive tang (Fig. 7A-129A).
Fig. 7 A - 1 2 9 A - R e m o v i n g Pum p Drive Gear
This side should be facing away from the pump body
gear pocket.
4. Inspect drive and driven gear pocket and crescent
for scoring or damage.
5. Inspect pum p body face for nicks and overall
flatness.
6. Inspect for open oil passages (Fig. 7A-130A).
7. Inspect for dam aged bolt hole threads.
8. Inspect for open drainback hole.
9. Inspect bushing for scores or nicks.
10. If removed, coat outside of seal body with non­
hardening sealing com pound; support pump body, oil seal
side up, and using J-25016, install new pump body oil seal
(Fig. 7A-131A).
11. Install driven pum p gear with identification m ark
down against gear pocket of pum p body (Figs. 7A-132A and
7A-133A).
12. Install drive gear with identification marks on drive
tangs up (Fig. 7A-129A).
13. Pum p body face to gear face clearance should be
0.020-0.055mm (.0007"-.0021") (Fig. 7A-134A).
14. Place the check ball into the check ball pocket in
the pump body and retain it with petrolatum . (See Fig. 7A-
130A for ball location).
H O LD IN G BOLT
PRESSURE REG ULATOR
V A L V E
V A L V E BORE PLUG
SNAP RING
*
P U M P B O D Y
V O I D
C O N V E R T E R
F E E D
L I N E
B O O S T
C O N V E R T E R
T O C O O L E R
F R O M
C O O L E R *
T O L U B E
•a
R E V E R S E D R I V E 3 R D / R E V E R S E
S E A L D R A I N
B A C K H O L E
D I R E C T
C L U T C H
L I N E
B O O S T
L I N E
P U M P
I N T A K E P U M P
I N T A K E
CHECK BALL
7 14mm (.281")
Fig. 7A -1 2 8 A Removing or Installing Pressure Regulator
Valve \
Fig. 7A-130 A~Pum p Body Assembly