Paragraphs 137-140
ALLIS-CHALMERS
shaft to the position that will align
the fan pulley with the crankshaft
pulley.
137.
OVERHAUL WC-WF BUSH-
ING TYPE. To disassemble pump, re-
move nut, fan hub, and key. If pump
does not have nut on front of shaft,
use a press or puller to remove fan
hub.
Remove cover screws and cover
(13—Fig. AC53B). Register impeller
vanes with notches in pump body and
withdraw shaft (19) and impeller (6)
from rear of pump body (3). Thrust
washer (12) and seal (11) can be re-
moved from shaft. To remove impeller
from shaft, remove pin (8) and use a
puller or press. Rear surface of rear
bushing (4) contacted by the carbon
thrust washer (12) must be smooth
and true. When pressing bushings into
pump body, use a mandrel .001 inch
larger than shaft diameter to prevent
crushing bushings. Be sure notch in
edge of thrust washer is engaged with
driving pin (7) in impeller and retain-
er (9) and spring (10) are installed
correctly between end of shaft and
cover. Fan hub flange should be
pressed on shaft to the position that
will align the fan pulley with the
crankshaft pulley.
138.
WC - WD - WD45 - WF BALL
BEARING TYPE. On these pumps
shown in Fig. AC53C, follow same
procedure as outlined for models B, C,
CA, and RC in paragraph 136.
NON-DIESEL ELECTRICAL SYSTEM
ELECTRICAL EQUIPMENT
139.
DISTRIBUTORS. Model CA is
equipped with a Delco-Remy 1111735
distributor. The model G distributor
is a Delco-Remy 1111708. Models WD
and WD45 are equipped with a Delco-
Remy 1111745 distributor. Specifica-
tions are as follows:
1111708
Rotation, drive end CC
Advance data, distributor
degrees and rpm
Start 0-2
@
400
Intermediate 2-4
@
600
Maximum 5-7
@
900
Contact gap 0.022
Cam Angle, degrees 25-34
1111735 & 1111745
Rotation, drive end CC
Advance data, distributor
degrees and rpm
Start 2-5
@
225
Intermediate 3-6 @ 300
Intermediate 6-9 @ 375
Maximum 14-16 @ 550
Contact gap 0.022
Cam Angle, degrees 25-34
GENERATORS. All valve-in-head
models used eithier a Delco-Remy
1101357 or a 1101413 generator and
most of them obtained regulation with
a 3 step resistance switch Delco-Remy
479G. The model G generator is a
Delco-Remy 1101854. Specifications
are as follows:
1101357 & 1101413
Brush spring tension
19
oz.
Field draw, volts 6.0
Field draw, amperes 3.5- 4.5
Hot output, amperes 10.0-13.0
Hot output, volts 7.4- 7.7
Hot output, rpm 2200
1101854
Brush spring tension
19
oz.
Field draw, volts 6.0
Field draw, amperes 2.0-2.3
Hot output, amperes 7.5-9.5
Hot output, volts. 7.2-7.4
Hot output, rpm 3000
STARTING
MOTORS.
Prior to about
1949 the valve-in-head models were
equipped with a Delco-Remy starter
either 1107017 or 1107043. Later ser-
ies valve-in-head models used 1107951.
except the CA which has a 1107096
Delco-Remy starter. Model G has a
1109605 starter. Specifications are as
follows:
1107017 & 1107043 & 1107096
Volts 6
Brush spring tension 26-28 oz.
No load test, volts 5.65
No load test, amperes 70
No load test, rpm 5500
Lock test, volts 3.25
Lock test, amperes 550
Lock test, torque, ft.-lbs 11
1107951
Volts 6
Brush spring tension 24-28 oz.
No load test, volts 5.0
No load test, amperes 60
No load test, rpm ... 6000
Lock test, volts 3.0
Lock test, amperes 600
Lock test, torque, ft.-lbs 15
TDC
Fig.
AC53D-^Modeis WC. WF and early
WD flywheel viewed from rear. "F" or
"Fire"
ts the oniy mark which appears on
the fiywheei when viewed through inspec-
tion port tn lower side of ciutch housing.
Later WD and ail WD45 fiywheeis are simi-
iar and are marked with a "DC" mark.
IGNITION TIMING
Models B-C-CA-RC-WC-WD
(Magneto)
140.
Fairbanks-Morse model FMJ or
FMX-4B3 magneto of clockwise rota-
tion (viewed from impulse coupling)
and a 30 degree lag angle impulse cou-
pling is used on these engines.
Set breaker contacts to .020 gap.
Magneto is timed to the advance tim-
ing mark **F", or "Fire" which is 30
deg. BTC or
ZVB
inches BTC, on WD
flywheel. To time the magneto to the
engine, first crank engine until No. 1
piston is on its compression stroke and
the flywheel timing mark is centered
in inspection port (located in bottom
of clutch housing).
34
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