ALLIS-CHALMERS
Paragraphs 140A-140B
Fig.
AC53E — Model CA
equfppsd wifh battery
igni-
tion unit. Distributor receives
its drive from governor gear
and shaft.
TG.
Timing gear cover
11.
Manual throttle lever
12.
Cross shaft
16.
Control housins
18.
Control lever spring
31.
Distributor drive housing
Remove magneto distributor cover
and rotate impuise coupling backward
until the distributor rotor is aligned
with the timing lug (projection in up-
per left corner of distributor compart-
ment).
With the rotor held in this posi-
tion,
(breaker contacts just opening)
install magneto to engine. Elongated
slots in magneto mounting flange will
permit a closer distributor rotor-to-lug
alignment if same has been disturbed
during installation. If magneto coup-
ling cannot be engaged without turn-
ing magneto shaft more than 10 de-
grees (as might be the case where the
magneto is being retimed after over-
hauling the governor shaft), the drive
gear must be remeshed to the camshaft
gear. Connect No. 1 spark plug wire
to the No. 1 distributor terminal (di-
rectly over rotor and lug). Firing or-
der is 1-2-4-3.
Models CA-WD-WD45 (BaHery
Ignition)
140A. Crank engine until
No.
1
piston
is coming up on compression stroke
then crank slowly and stop when fly-
wheel mark "Fire" is in center of in-
spection port (left side of torque tube
on CA; bottom of clutch housing on
WD and WD45.) Place distributor ro-
tor in position where metal strip on
top of same is pointing toward battery
lead terminal on distributor body.
With contacts set to .022 gap, place
distributor in mounting bracket and
engage the driving members. Now ro-
tate distributor cam as far as it will go
in direction of its normal rotation and
while holding it in this position, rotate
the distributor body until the contacts
just start to open. Now tighten the
mounting bracket to lock the distribu-
tor in this position.
This method
%ets
the fully advanced
or running timing of the distributor.
If a timing light is available the timing
should be rechecked by running the
engine at fast idle (above 1100 rpm)
at which time the flash should occur
when flywheel mark "FIRE" or "F" is
centered in the inspection port.
Static timing is top center which is
indicated on the flywheel by the mark
"DC".
Model G
140B.
Delco-Remy model 1111708
distributor, of counter clockwise ro-
tation (viewed from gear end) is used
on this tractor. Set breaker points to
.020 gap. To time the distributor to
the engine, crank the engine until No.
1 piston (timing gear end) is on its
compression stroke and the notched
timing mark located on crankshaft
pulley is centered in inspection hole,
as shown at (T), in Fig. AC53G.
Notched timing mark is located 3 de-
grees before TC.
Install the distributor unit to the
cylinder block opening with the rotor
(flnger) under the nilmber one ter-
minal in the cap and with the primary
wire terminal pointing at 2 o'clock ap-
proximately. Rotate distributor hous-
ing anti-clockwise until breaker con-
tacts have just opened, then tighten
distributor clamp. Firing order is 1-3-
4-2.
Frg.
AC53F—Moder CA
battery ignition unit
and drive — exploded
view. Shaft and gear
(21) are available only
as on assembly.
7.
Governor shaft bushing
21.
Governor shaft
&
erear
22.
Governor shaft bushing
23.
Distributor drive gear
30.
Gasket
S2.
Oil tube
33.
Gasket
84.
Oil tube tee
35.
Hetalnlngpin
36.
Drive houting
Fig.
AC53G — Model G ignition timing
mark, located on face of crankshaft pu!ley,
is viewed through inspection port in hood
support as shown.
35
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