Chevrolet 1977 10 Series, Руководство по ремонту, Страница: 428 / 468

7B-48
OVERHAUL MANUAL
Fig. 7B-1
6
L—Installing 2nd Speed Gear Bushing
Fig. 7B-1 7 L—Installing 3rd Speed Gear Bushing
3. Inspect clutch hub -and clutch sleeve for excessive
wear and make sure sleeve slides freely on clutch hub. Also
check fit of clutch hub on m ainshaft splines.
N O TE: T hird and fourth speed slutch sleeve should
slide freely on third and fourth speed clutch hub but
clutch hub should be snug fit on shaft splines.
4. Inspect 3rd speed gear thrust surfaces for excessive
scoring and inspect third speed gear mainshaft bushing for
excessive wear.
N O TE: T hird speed gear m ust be a running fit on
m ainshaft bushing and m ainshaft bushing should be
press fit on shaft.
5. Check second speed thrust washer for excessive
scoring.
6. Inspect 2nd speed gear for excessive wear at thrust
surface. Check synchronizer springs for looseness or
breakage.
7. Inspect second gear synchronizing ring for excessive
wear.
8. Inspect bronze synchronizer cone on 2nd speed gear
for excessive wear or damage. Also inspect clutch gear
synchronizer cone and third speed gear synchronizer cone for
excessive wear or damage.
N O TE: First and reverse sliding gear m ust be sliding fit
on synchronizer hub and m ust not have excessive radial
or circum ferential play. If sliding gear is not free on hub,
inspect for burrs which may have rolled up on front end
of half-tooth internal splines and remove by honing as
necessary.
9. Inspect all gear teeth for excessive wear.
Assembly
1. Using Tool J-22873 press 2nd speed bushing onto
m ainshaft until it bottom s against shoulder (Fig. 7B-16L).
N O TE: Lubricate bushing with E.P. oil before pressing.
CAUTION:
1st, 2nd and 3rd speed gear bushings
are sintered iron, exercise care when installing.
2. Press 1st and 2nd speed synchronizer hub onto
mainshaft until it bottom s against shoulder with annulus
toward rear of shaft.
3. Install 1st and 2nd synchronizer keys and springs (if
previously removed).
4. Using Tool J-22873 press 1st speed gear bushing onto
m ainshaft until it bottom s against hub (Fig. 7B-17L).
N O TE: Lubricate all bushings with E.P. oil before
installation of gears.
5. Install synchronizer blocker ring and 2nd speed gear
onto m ainshaft and against synchronizer hub. Index
synchronizer key slots with keys in synchronizer hub.
6. Install 3rd speed gear thrust washer onto mainshaft
with tang on th ru st washer in slot on shaft and against 2nd
speed gear bushing. Then press 3rd speed gear bushing onto
mainshaft using Tool J-22875 until it bottom s against thrust
washer (Fig. 7B-18L).
7. Install 3rd speed gear synchronizer blocker ring and
3rd speed gear onto mainshaft, against 3rd speed gear thrust
washer.
8. Index synchronizer ring key slots with synchronzier
assembly keys and press 3rd and 4th synchronizer assembly
onto m ainshaft using Tool J-22875 and against 3rd speed gear
bushing thrust face tow ard 3rd speed gear (Fig. 7B-19L).
Retain synchronizer assembly with snap ring.
J -2 2 8 7 3
2 N D GEAR
BUSHING
1ST GEAR
BUSHING I
J-22872