ALLIS-CHALMERS
Paragraphs 168-179
168.
RELEASE BEARING. After en-
gine has been detached from clutch
housing, disengage shifter (5—Fig.
AC75) from shifter fork (14) and re-
move shifter and release bearing (4)
from shifter bracket (6). Release
bearing can be pressed off shifter.
169.
CLUTCH SHAFT. For repair
information, refer to paragraph 226.
170.
SHAFT SEAL. With release
bearing removed, remove set screw
(15) from shifter fork and disconnect
spring (12). Turn shifter fork down,
remove cap screws from shifter brack-
et (6) and remove bracket and cork
seals (7).
171.
SHIFTER FORK. Can be re-
moved from below without removing
engine by removing shifter fork shaft
arm (24), extracting sha:ft (16) from
housing, and withdrawing fork from
below.
Models WD-WD45 Engine Clutch
Models WD and WD45 tractors are
equipped with either a 10 inch single
plate spring loaded model lORM Rock-
ford clutch or an AlO Auburn clutch.
Clutch cover assembly number is:
Rockford, R4259; Auburn 100057-1.
Flywheels used on models equipped
with a Rockford clutch are not inter-
changeable with the same tractor mod-
el which is equipped with an Auburn
clutch.
Effective with the WD tractor
equipped with engine W310920 and all
WD45 tractors, the clutch shaft has no
pilot bearing.
For repair information on clutch
shaft, shaft bearings, or shaft rear oil
seal, refer to TORQUE TUBE,
174,
ADJUSTMENT. Clutch pedal
should have Vz to one inch of free
travel when measured between pedal
and top of tractor frame rail. This
amount of free pedal travel produces
the desired clearance of Vi inch be-
tween release bearing face and face
of release levers. Adjustment is made
by turning the threaded pivot (12—
Fig. AC77).
175.
R&R & RELINE. To remove
the clutch, first remove the engine
assembly as outlined under R&R
ENGINE WITH CLUTCH. Insert a
tapered block between outer end of
each release lever and backing plate
to relieve spring pressure and remove
the six clutch retaining cap screws.
Each side of the Rockford clutch
driven plate has two Vs inch thick seg-
ments (20—Fig. AC76) alternated by
two 5/32 inch thick segments (5). The
VB
inch segments of one side are riv-
eted to the 5/32 inch segments of the
other side. Install all rivets with the
16
10
Fig, AC77-'Models WD and WD45 engine clutch release bearing, fork and linkage-
exploded view. Clutch pedal free travel adjustment is made at (12), Models RC, WC,
and
WF
are similar.
1.
Fork lever
2.
Fork shaft
3.
Sleeve bracket
4.
Release bearing
6. Bearing sleeve
6. Fork return spring
7.
Shifter fork
8. Set screw
9. Spring anchor
10.
Clutch pedal shaft
11.
Clutch rod
12.
Adjusting pin
13.
Latch stud
14.
Pedal latch
15.
Clutch pedal
16.
Pedal pad
Fig, AC78 - Model WD
transmission clutch in^
stallation. Clutch assem*
biy can be removed af'
ter detaching transmis-
sion from torque tube. To
adjust clutch, add or re-
move shims /T). Note hy-
draulic pump hold valve
adjusting screw at (C),
Model WD4S is similar.
rivet heads in the Vs inch thick seg-
ments.
176.
FRONT OIL SEAL. The clutch
housing contains the engine clutch
shifter fork (7—Fig. AC77), clutch
release bearing (4) and clutch shaft
front oil seal (9—Fig. AC84). The
shifter fork can be removed from be-
low without detaching engine from
clutch housing. However, renewal of
the clutch release bearing and/or
sleeve will require detaching engine
from clutch housing.
Clutch shaft front oil seal (9) of
treated leather can be renewed after
detaching engine from clutch housing
and removing release bearing guide
sleeve. Install new oil seal with lip
facing rearward (transmission).
176A. CLUTCH SHAFT. For repair
information, refer to Torque Tube,
paragraph 192,
177.
R&R CLUTCH HOUSING. Pro-
ceed as follows: Remove engine as
outlined under R&R ENGINE WITH
CLUTCH. Block up and support trac-
tor, and remove the left main frame
rail.
Remove fuel tank, air cleaner and
starting motor. From the right main
frame rail, remove belt pulley unit
and two clutch housing retaining bolts.
Disconnect torque tube from clutch
housing and remove clutch housing.
CA FINAL DRIVE CLUTCH
178.
An auxiliary clutch, mounted in
series with the right final drive unit
bull pinion shaft, is used on this model
when it is sold with the A-C continu-
ous power PTO. For repair informa-
tion on this unit, refer to paragraphs
284 through 285A.
WD-WD45 TRANSMISSION
CLUTCH
The transmission clutch is an
8-inch
Rockford over-center, double disc
type,
as shown in Fig. AC78. The
clutch plates are faced with metallic
type friction material.
The transmission clutch is installed
only in those tractors equipped with
the continuous power PTO.
179.
ADJUSTMENT. To compensate
for disc wear, proceed as follows:
Remove battery, battery carrier and
the clutch housing (torque tube) top
cover. With the clutch disengaged and
front plate (8—Fig. AC78), center
51
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