ALLIS-CHALMERS
Paragraphs 153-158
aforementioned timing marks are in
register.
After the pump is installed, make
the final timing setting as outlined in
paragraph 150,
153.
GOVERNOR. Model PSB in-
jection pumps are equipped with a
mechanical flyweight type governor.
For the purposes of this manual, the
governor will be considered as an in-
tegral part of the injection pump.
153A. ADJUSTMENT. Recommend-
ed governed speeds are as follows:
Maximum no load
engine speed 1975-2000 rpm
Maximum full load
engine speed 1625 rpm
Power take-off speed at
1975 engine rpm 668 rpm
Low idle engine speed., 600-650 rpm
To adjust the governor, first start
engine and run until engine is at nor-
mal operating temperature,
153B,
The low idle speed of the en-
gine is controlled by the position of
the throttle lever and is adjusted by
placing the throttle in the idle posi-
tion and adjusting the idle stop screw
(74_Fig. AC64A) to give 600-650 rpm
at low idle.
The shut-off stop screw (67) should
be set so that no force can be applied
to the control arm in the hydraulic
head control sleeve when it is in the
shut off position. This screw can be
set by using spacers as required.
Spacers are available in 0.062, 0,125
and 0.188 thicknesses.
The high idle engine speed is ad-
justed by nuts (76—Fig. AC66) which
vary the length of the externally lo-
cated governor spring.
ENERGY CELLS
154.
R&R AND CLEAN. The nec-
essity for cleaning the energy cells is
usually indicated by excessive exhaust
smoking, or when fuel economy drops.
To remove Nos, 2, 3, 4 or 5 energy
cells,
remove the air intake pipe and
intake manifold. Remove the energy
cell clamp and tap the energy cell
cap with a hammer to break loose any
carbon deposits. Using a pair of pliers
remove the energy cell cap, A 1/4-inch
tapped hole is also provided in the
cap to facilitate removal.
The outer end of the energy cell
body is tapped with a 78-14 thread
to permit the use of a screw type
puller when removing the cell body.
The cell body can also be removed by
first removing the respective nozzle,
and using a brass drift inserted through
the nozzle hole, bump the cell out of
the cylinder head.
The removed parts can be cleaned
in an approved carbon solvent. After
parts are cleaned, visually inspect
them for cracks and other damage.
Renew any damaged parts. Inspect the
seating surfaces between the cell body
Fig.
AC67—Installing the energy
cell.
If
the surfaces (S) are rough or pitted, they
can be reconditioned by lapping.
and the cell cap for being rough and
pitted. The surfaces (S—Fig, AC67)
can be reconditioned by lapping with
valve grinding compound. Make cer-
tain that the energy cell seating sur-
face in cylinder head is clean and free
from carbon deposits.
When installing the energy cell,
tighten the clamp nuts enough to in-
sure an air tight seal.
PREHEATER
155.
An exploded view of the heater
box is shown in Fig, AC68, Normal
service includes renewing gaskets and
making certain that electrical connec-
tions are tight,
DIESEL
COOLING SYSTEM
RADIATOR
156.
To remove radiator, first drain
cooling system. Remove hood and
loosen top and bottom radiator hoses.
Remove cap screws holding radiator
and shell to frame and remove radia-
tor and shell as a unit. Further dis-
assembly of radiator and shell is self
evident upon examination. Reinstall
by reversing the above procedure,
THERMOSTAT
157.
The thermostat can be removed
after removing the thermostat housing
from front of the water outlet casting
which is located on top of cylinder
head. The thermostat is preset to open
at 170 degrees,
WATER PUMP
158.
RESEAL AND OVERHAUL.
The pump cannot be overhauled with-
out removing the pump from the trac-
Fig.
AC68 — Ex-
ploded view of en-
gine pre-heater unit.
13.
Heater element
preheat-chamber
14.
Element spacer
15.
Screen
Pig.
AC66 — The engine high idle speed
is adjusted with nuts (76).
47
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