Ford 4000 Series Shop Manual page 107

Paragraphs 311-312
Fig. 347-Exploded view of model 4000 brake assembly. Brake inner housing ( 1) Is same as (21-Fig
330) and outer housing ( 8) is same as ( 19-Fig. 330).
1. Brake inner housing
2. Torque pin 6. Steel balls
3. Brake discs 7. R ettro
4 Stationary disc 8. Brake k e outer housing
5. Actuating discs 9. Jam nuts
10. Actuating links 14. Clip
11. Pull rod 15 . Clevis
12. Clevis pin
16. Lock not
13. Oil seal 17. Pull rod nut
the adjusting screw spring and adjuster
assembly. Remove brake shoe return
springs and the brake anchor strut
plate, then remove brake shoes from
anchor pins and backing plate as-
sembly. Brake shoes are interchange-
able from top to bottom. Install new
brake shoes by reversing removal pro-
cedure and adjust as outlined in para-
graph 308.
R&R BRAKE DISCS AND
ACTUATING ASSEMBLY
Model 4000
311. Brakes are of the multiple disc
wet type and are located in the rear
axle housings. To, gain access to the
brakes, proceed as follows:
Remove rear fenders and disconnect
electrical wiring and brake linkage.
Drain bil from center housing. Remove
rear wheel weights if installed. Sup-
port tractor under rear axle center
housing and adequately brace tractor
so that it will not tip with rear axles
removed. Attach hoist to rear wheel
and axle housing unit,'unbolt and sepa-
rate axle housing from center housing.
Lay the wheel and tire unit down on
floor with axle housing upward to pro-
vide a solid base for further disas-
sembly of unit. Remove opposite wheel
and axle housing unit in similar
manner. Note: When left axle housing
is removed it is suggested that the dif-
ferential assembly be removed from
the rear axle center housing to prevent
the assembly from accidentally falling
out.
On 4000 models with differential
lock, it will be necessary to remove dif-
ferential lock fork from right axle
housing. Loosen differential lock fork
lock nut and set screw, then remove
lever shaft and fork from axle housing.
Refer to Fig. 347 and proceed as fol-
lows: Unbolt and remove inner disc
brake housing assembly from inner
end of axle housing. Remove brake con-
trol rod fastener and, if damaged, re-
move brake rod seal. To remove seal,
place a sharp tool between seal flange
and housing and pry seal out. Remove
the brake disc assemblies, interme-
diate discs, the actuating disc assembly
and the outer brake housing.
NOTE : Where differential carrier
bearing cup is Installed In Inner brake
housing , differential carrier bearing ad-
justment Is made by adding or removing
shims from between bearing cup and
brake housing . Therefore , If either the
Inner or outer brake housing are renewed,
differential carrier bearing adjustment
may be affected . Refer to paragraph 301.
The brake actuating assembly can be
disassembled, if necessary, as follows:
Remove clevis pin to disconnect control
rod from the actuating links. Remove
the four actuating disc return springs,
separate the actuating discs and re-
move the six steel balls. Inspect all
parts and renew as necessary. To reas-
semble, lay one disc on bench with
inner side up and lay the six balls in
the ramped seats. Lay the other disc on
top of the balls so that the lugs for the
torque pin are about one inch apart and
install the four return springs. If self-
locking nuts have been removed from
links, install new nuts. Reconnect con-
trol rod to links.
To reinstall brake components in
axle housing, proceed as follows: In-
stall outer brake housing on the eight
studs in axle housing and insert torque
pin in brake housing. Then, refer to
FORD
ADJUSTING
LOCKNUT_
Fig. 348- Adjusting handbrake unit on models so
equipped.
Fig. 347 for reassembly of brakes. After
inner brake housing is installed,
tighten the retaining nuts to a torque
of 72-90 Ft.-Lbs.
Reinstall axle housing to center
housing using new "0" ring on axle
housing. Tighten axle housing re-
taining cap screws to a torque of 110-
135 Ft.-Lbs. and stud nuts to a torque
of 130-160 Ft.-Lbs. Refill center
housing to proper level with correct
lubricant; refer to paragraph 340.
BRAKE CROSS SHAFT AND
SEALS
All Models
312. On all models, the brake pedals
are supported by a cross shaft running
through the rear axle center housing.
The right brake pedal pivots on outer
right end of shaft and is retained by a
snap ring and washer. The left brake
pedal is clamped and keyed to the
shaft. The shaft pivots in renewable
bushings in the bores in center housing
and an oil seal at outer side of each
bushing prevents lubricant from
leaking past the shaft. On all models
with engine clutch the clutch release
pedal pivots on left end of brake cross
shaft.
To renew the cross shaft, shaft bush-
ings, pedal bushings and/or cross shaft
seals, proceed as follows: Drain rear
axle center housing. Disconnect brake
pedal return springs, brake rods and
the clutch release rod. Remove snap
ring and washer from right end of cross
shaft and remove right brake pedal.
Loosen clamp bolt in left brake pedal,
remove pedal from shaft, extract the
key from the shaft keyway and remove
thrust washer. Remove all burrs from
right end of shaft, then withdraw the
shaft from center housing and, if so fit-
116