Ford 4000 Series Shop Manual page 84

2000 - 3000-4000
Fig. 262-Rembying Servo 2-3
cover from transmission
housing. Inset shows servo
tubes being pulled from dis-
tributor to permit removal of
the distributor.
we
Fig. 259 - View showing placement of Servo 1,
band 1 , adjusting screw and strut to "A" sun
gear ( direct drive clutch housing).
4. Servo spring
13. Bend1
4. "0" ring
14 .
Adjusting screw
S. Servo piston
39. A'sungear-
9. Piston rod
Direct Drive
10. "0" ring
1I. Strut
Clutch housing
Fig. 260-Exploded view of Servo I assembly.
N. Nut
W. Washer
1. Cover
2. Gasket
3. RatainSr
4. Spring
5. Snap ring
7. "0" ring
8. Piston
9. Piston rod
10. "0., ring
11. Strut
Fig. 261-Compressing servo assembly in hy-
draulic press to remove nut and washer from
piston rod.
should be 0.005 to 0.015. Record the
end play measurement for reassembly.
Front end play is adjusted by se-
lecting,the,proper thickness of thrust
washer to be installed between the dis-
tributor and clutch 1; refer to Fig. 255.
This thrust washer is available in
thickness of 0.062 to 0.122 in steps of
0.010.
1257. TRANSMISSION REAR
END PLAY. Transmission rear end
play can be checked after splitting
tractor between transmission and the
rear axle center housing and removing
the top cover. To check rear end play,
proceed as follows:
i.oosen the Band 3 adjusting screw so
that the band is completely released.
Mount a dial . indicator as shown in Fig.
257. Pugh in on the transmission
output shaft and zero the dial indicator
while holding pressure on shaft. Then
pry between "C" carrier and "C" ring
gear with a screwdriver (see inset in
Fig: 257); the resulting dial indicator
reading will be. transmission rear end
play which should be 0.005 to 0.015.
Transmission rear end play' is ad-
justed by selecting the proper thickness
of thrust washer to be installed be-
tween the shoulder on transmission
output shaft. and rear support on
models 400,0, or between the 'D' sun
geat and "D" carrier on models 2000
and 3000. This washer is available in
thicknesses of 0.102 to 0.142 in steps of
0.010 fbr models 4000 and in thick-
nrisses of 0.092 to 0.132 in steps of
0.010, and also thickness of 0.140 and
0.150 for models 2000 and 3000.
268. SERVO 1 COVER AND
SERVO 1 ASSEMBLY. To remove
the Servo 1 Cover and Servo 1 assem-
bly, proceed as follows:
While holding Band 1 adjusting
screw from turning, remove the ad-
justing screw locknut and flat washer.
Paragraphs 257-259
Then, slowly back adjusting screw out
until servo spring tension is relieved.
CAUTION: Do not back adjusting
screw out farther than necessary as
this will allow the Band 1 strut to fall
out of place making disassembly of
transmission necessary. Remove the
four cap screws retaining Servo 1
Cover to transmission and carefully
remove cover. Slowly turn adjusting
screw in, forcing servo assembly out,
until screw is,tight. Then, withdraw
servo assembly from transmission
housing. Refer to Fig. 258.
The servo sealing "0" rings (7 and 10
-Fig. 260) can now be renewed and
the servo assembly reinstalled. How-
ever, if inspection of unit reveals exces-
sive wear or other defect, proceed as
follows to disassemble and overhaul
the servo:
NOTE: On early production units, Servo
1 piston rod pilot diameter was 0.730-
0.714 , and piston outer diameter was
1.993- 1.997. if these early parts are en-
countered , servo operation can be Im-
proved by„ renewing both the rod and
piston ; service and late production piston
rod pilot diameter Is 0.734 - 0.736, and
piston outer diameter Is 1.981 -1.985. The
larger rod pilot diameter and the smaller
piston diameter reduce the possibility of
piston cocking and wedging In bore of
transmission housing.
259. To disassemble the servo, place
the assembly in a press using sleeve
and step plate as shown in Fig. 261.
Compress the servo spring and remove
the nut (N-Fig: 260) and washer (W)
from piston rod (9). Slowly release
spring tension, remove unit from press
and remove the retainer (3) and spring
(4). Remove piston retaining snap ring
(6), then push or press piston rod from
piston. To reassemble, reverse disas-
sembly procedure. When reinstalling
piston, be sure. sharp edge of snap ring-
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