Chevrolet 1977 10 Series, Руководство по ремонту, Страница: 343 / 468

AUTOMATIC TRANSMISSIONS
(400)7A-23
VENT
CONVERTER
TO
COOLER
MODULATOR OR
INTERMEDIATE
DRIVE
COOLER
RETURN
REVERSE
PRESSURE REGULATOR
FEED HOLE
VENT
MODULATOR OR
INTERMEDIATE
TO
COOLER
COOLER
RETURN
BREATHER
HOLE
LUBE
COVER-PUMP
INTAKE
DRIVE
Fig. 7 A -7 5 C -- P u m p B o d y Oil Passages Fig. 7 A - 7 6 C ~ P u m p Co ve r Oil Passages
scoring, galling or other damage.
2. Place pum p gears in pum p body and check pum p body
face to gear face clearance (should be .0008" - .0035") (Fig.
7A-74C).
3. Check face of pump body for scores or nicks.
4. Check oil passages (Fig. 7A-75C).
5. Check for damaged cover bolt attaching threads.
6. Check for overall flatness of pum p body face.
7. Check bushing for scores or nicks. If replacement is
necessary, proceed as follows:
a. Using Tool J-2 1465-17 and driver Handle J-8092
remove bushing.
b. From front side of pump, using J-2 1465-17 and driver
H andle J-8092 install new bushing flush to .010" below gear
pocket face.
8. Inspect pum p attaching bolt seals for damage, replace
if necessary.
9. Inspect pump cover face for overall flatness.
10. Check for scores or chips in pressure regulator bore.
11. Check that all passages are open and not
interconnected (Fig. 7A-76C).
12. Check for scoring or damage at pump gear face.
13. Inspect stator shaft for damaged splines, or scored
bushings. If replacement of bushing is necessary proceed as
follows:
Front
a. W ith pum p cover and stator shaft properly supported,
using Tool J-2 1465-15, with slide ham m er tool J-2619, and
adapter Tool J-2619-4 remove bushing.
b. Using Tool J-2 1465-3 with Driver Handle J-8092
press or drive replacement bushing into place until tool
bottoms.
R e a r
c. W ith pum p and stator shaft properly supported, using
Tool J-2 1465-15, with slide ham m er Tool J-2619 and adapter
tool J-2619-4, remove bushing.
d. Using Tool J-2 1465-2 with Driver Handle J-8092,
pressor drive replacement bushing into place until tool
bottoms.
14. Inspect oil ring grooves for damage or wear.
15. Inspect selective washer thrust face for wear or
damage.
16. Inspect pressure regulator and boost valve for free
operation in their respective bores.
17. Inspect pum p cover for open 1/8" breather hole (Fig.
7A-76C).
Assembly
1. Install drive and driven pum p gears with alignment
marks up into pum p body (Fig. 7A-72C) drive gear tangs up.
2. Protect stator shaft and install pump cover in vise.
3. Install spacer(s) if used, retainer and spring, into
pressure regulator bore (Fig. 7A-77C).
4. Install pressure regulator valve from opposite end of
bore, stem end first.
5. Install boost valve into bushing, stem end out, and
install both parts into pum p cover by compressing bushing
against spring.
6. Install retaining snap ring.
7. Install pressure regulator valve bore plug and
retaining pin into opposite end of bore.
8. Install previously selected front unit selective thrust
washer over pum p cover delivery sleeve.
9. Install two (2) hook type oil seal rings.
10. Assemble pum p cover to pum p body with attaching
bolts (Fig. 7A-78C).
NOTE:
Leave bolts one turn loose at this time.
11. To align the pum p body and cover, place the pum p