Paragraphs 159-163
8
Pulley hub
Drive shaft
Gasket
Seal
Cover
Impeller
Washer
Pump body
Snap ring
Fig.
AC69—Exploded view of water pump. The pump con be removed offer
removing the rodiotor.
tor. To remove the pump, first re-
move the radiator. Remove fan blades
and pump pulley and unbolt pump
from cylinder head. Using a press or
suitable puller, remove pulley hub.
Remove cover from back of pump and
using a pair of long nose pliers, re-
move the pump shaft retaining snap
ring. Press the drive shaft and bear-
ing unit out of impeller and pump
body.
Renew bearing and shaft unit (2—
Fig. AC69) if shaft is bent or if bear-
ing is a loose lit in pump body. In-
spect seal contacting surface in pump
body. If the surface is pitted or rough,
either recondition the surface or re-
new the pump body. Always renew
a questionable seal.
When reassembling, press the shaft
and bearing unit into the pump body
and install the retaining snap ring.
Assemble seal into impeller and start
the impeller on the shaft. Place pump
in a vise and press the impeller on
the drive shaft until end of shaft is
flush with rear surface of the im-
peller. Press pulley hub on front of
drive shaft and install cover.
Note: A newly overhauled pump
might leak for the first few hours of
operation. This condition should cor-
rect itself after the parts have had an
opportunity to wear in.
ALLIS-CHALMERS
DIESEL ELECTRICAL
SYSTEM
GENERATOR, REGULATOR AND
STARTING MOTOR
159.
Delco-Remy generator No.
1100994, regulator No. 1118791 and
starting motor No. 1108998 are used.
Test specifications are as follows:
1100994 Generator
Brush spring tension
16
oz.
Field draw, volts 12.0
Field draw, amperes 2.0-2.14
Hot output, amperes 9-11
Hot output, volts 13.8-14.2
Hot output, rpm 2400
1118791 Regulator
Cut-out relay
air gap 0020
point gap 0-020
closing voltage—range 11.8-14.0
—adjust to 12.8
Voltage regulator
air gap 0.075
voltage setting—range 14.0-15.0
—adjust to 14.4
Ground polarity ^
1108998 Starter
Volts ^2
Brush spring tension 36-40 oz.
No load test, volts. 11-3
No load test, amperes 65
No load test, rpm 5500
Lock test, volts ^-0
Lock test, slmperes • 675
Lock test, torque, ft.-lbs 30
CLUTCH ON ENGINE
Models
B-C-CA
Rockford clutch model 9TT with
R2-3271 cover was used in model B
tractors up to serial number B7134;
model 9RM with R4409 cover in trac-
tors after serial number B7134 to en-
gine number 28222;
SV2RM
with R4665
cover in engine number 28222 and up,
and in models C and CA tractors. Some
early model B tractors were equipped
with Auburn Atwood clutches. Front
end of clutch shaft is piloted into an
Oilite bushing in the flywheel. Pilot
bearing lubricating wick is renewable;
refer to Crankshaft, paragraph 97, for
procedure,
160.
ADJUSTMENT. Remqve inspec-
tion plate (15—Fig. AC72) from bot-
tom of clutch housing or torque tube.
Turn release lever adjusting screws
(17) to obtain
VA
inch clearance be-
tween ends of release levers and re-
CLUTCHES
lease bearing (16). Clearance between
release bearing and each lever must
be the same within .010 inch.
Three threads of models B, C and
CA clutch rod (13) should protrude
through clutch fork pin (3). Some
early B model tractors were equipped
with Atwood clutches, and on these
tractors the clutch rod protrudes only
one thread through the fork pin. If a
Rockford clutch is installed in these
tractors, be sure to turn the rod in un-
til three threads protrude through the
fork pin.
161.
R&R CLUTCH UNIT. Place
supports under rear of engine and cen-
ter of torque tube. Loosen head light
mounting bolts. Remove hood and dis-
connect fuel line and governor control
rod. Disconnect rear end of radius rod
and drag link. Remove starting motor
and air cleaner. Remove bolts retain-
ing engine to torque tube and separate
tractor halves. Clutch can be removed
by removing cap screws retaining
clutch cover to flywheel.
Reassembly is reverse of disassem-
bly. Install driven plate with oil de-
flector toward flywheel. Align driven
plate with a clutch pilot tool or clutch
shaft.
162.
RELEASE BEARING. After en-
gine has been detached from torque
tube,
disconnect clutch rod (13—^Fig.
AC72) from clutch pedal and from
clutch fork pin (3). Remove shifter
shaft retainer (5) from between shifter
fork (4) and torque tube. Remove
shifter fork shaft (1) and slide clutch
shifter (2), release bearing (16), and
shifter fork off clutch shifter tube
(14).
Release bearing can be pressed
off shifter.
163.
CLUTCH SHAFT. To remove
clutch shaft (8) at this time, it is neces-
sary to first detach torque tube from
transmission, as outlined in paragraph
185A. Clutch shaft can be withdrawn
from rear end of torque tube.
48
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