Hercules JXD User manual

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W1.35
:
9.1706
TM
9–1706
WAR DEPARTMENT
TECHNICAL MANUAL
ORDNANCE
MAINTENANCE
HERCULES JXD GASOLINE ENGINE
FOR SCOUT CARS
September
13
,
1942
1942

배
0
Ul
}

TM 9–1706
1
TECHNICAL
MANUAL
No.
9-1706
ANUAL
}
WAR
DEPARTMENT
,
WASHINGTON , September 13 , 1942 .
ORDNANCE
MAINTENANCE
HERCULES
JXD
GASOLINE
ENGINE
FOR
SCOUT
CARS
.
Paragraphs
SECTION
I.
General
1
II
.
Service
maintenance
2-4
III
.
Technical
inspection
5-7
IV
.
Power
plant
trouble
shooting
and
tune
-
up
while
installed ..
8-9
V. Clutch .
10-16
VI . Cooling system ( fan and pump ) .
17-21
VII . Electrical - generator and regulator .
22-25
VIII
.
Electrical
—
ignition
system
26-31
IX
.
Electrical
-
starting
motor
32-38
X. Engine ( stripped )
39-48
XI
.
Fuel
system
49-55
XII
.
Lubrication
system
56-59
XIII
.
Preparing
engine
for
storage
60-69
XIV . Consolidated service data
70—77
XV
.
Special
tools
and
equipment
78-82
Page
APPENDIX . List of references
320
INDEX
322
SECTION
I
GENERAL
Paragraph
Scope 1
1. Scope . — a . General . — This manual is published for the informa
tion
and
guidance of
ordnance
maintenance
personnel
, and
is one
of
several maintenance manuals on these vehicles . It contains detailed
instructions for removal , disassembly , inspection , maintenance , repair ,
assembly , and installation of the Hercules JXD gasoline engine and
all
its
accessories for
scout
car
M3A1
.
These
instructions are
supple
mentary to those in the Field and Technical Manuals prepared for
the using arms . Additional descriptive matter and illustrations are
included
to
aid
in
providing a
complete
working
knowledge of
the
matériel
.
b . Vehicle generally . - Information concerning the service mainte
nance , technical inspection , and lubrication of the entire vehicle will
be found in TM 9–705 and 9–1705 .
1
37
349SU
XL
09/06
476794
°
-42
1
1914
31150-2M
me

TM 9-1706
1-4 ORDNANCE MAINTENANCE
c . Power
train
. - For
maintenance
information
concerning the
power
train
, refer
to TM
9–1705
.
d . Chassis and body . - For maintenance information concerning the
chassis and body components , refer to TM 9–1709 .
e . Diesel power plant . — For maintenance information concerning
the
Hercules Diesel engine
,
model DJXD
, and all its
accessories
, see
TM 9-1707
.
SECTION
II
SERVICE MAINTENANCE
Paragraph
Objective_
2
Scope
..
3
Allocation
of
repair jobs-
4
2.
Objective
.
There
is
a
decided
difference
between
the
purpose
of
organizational
maintenance
and
that
of
service
maintenance
.
Or
ganizational
maintenance
is
performed
by
the
using
arms
and
has
for
its
primary
objectives
the routine
steps
in
preventive
mainte
nance
,
together
with
the
care
and
adjustment
of
vehicles
and
their
equipment
,
so
that
the
matériel
will
be
in
good
operating
condition
and
there
will
be
a
minimum
of
time
lost
for
repairs
.
Service
maintenance
by
light
and
heavy
maintenance
units
of
the
Ordnance
Department
has
for
its
primary
objectives
supply
,
technical
inspec
tion
,
and
corrective
action
and
in
general
all
repairs
beyond
the
capacity
of
the
using
arms
.
This
work
is
accomplished
either
by
unit
replacement
,
overhauling
,
rebuilding
,
reclaiming
,
manufactur
ing
,
or
any
other
necessary
expedients
.
3.
Scope
. — The
scope
of
maintenance
and
repairs
by
maintenance
personnel
is
determined
by
the
amount
of
time
available
, weather
conditions
,
cover
and
concealment
,
shelter
,
proximity
or
exposure
to
hostile
fire
, equipment
tools
and
parts
available
, and
skill
of
the
personnel
.
Since
all
these
factors
are
variable
, no
exact
system
or
rules
of
procedure
can
be
prescribed
or
followed
.
4. Allocation of repair jobs . — The operations mentioned below
augment those which may be performed by the using arms .
a .
Clutch
.
(
1
)
Clutch
assembly-
Replace
,
repair
,
rebuild
.
(
2
)
Clutch
housing
Replace
.
b
.
Cooling
system
.
(
1
)
Fan
assembly
Repair .
( 2 ) Fan bushings or bearings- Replace .
2

TM
9–1706
HERCULES JXD GASOLINE ENGINE FOR SCOUT CARS
4
(
3
)
Radiator
..
Repair
.
(
4
)
Water
pump
Repair
,
replace
,
rebuild
.
c
.
Electrical
-
generator
and
regulator
.
(
1
)
Circuit
breaker
Adjust
or
repair
.
(
2
)
Generator
-----
Repair
or
rebuild
.
(
3
)
Voltage
regulator
Adjust
,
repair
,
rebuild
.
(
4
)
Current
regulator
Adjust
,
repair
,
rebuild
.
d
.
Electrical
-
ignition
system
.
(
1
)
Ignition
switch
.
Repair
.
(
2
)
Distributor
...
Repair
,
rebuild
.
e
.
Electrical
-
starter
.
(
1
)
Starting
motor
.
Repair ,
rebuild
.
(
2
)
Starting
switch
Repair
.
f
.
Engine
.
(
1
)
Camshaft
Replace
.
(
2
)
Connecting
rods
-----
Replace
.
(
3
)
Connecting
rod
bearings--
Adjust
and
replace
.
(
4
)
Crankshaft-
Grind
, polish
,
straighten
.
( 5 ) Cylinder
----
Honeboring
.
(
6
)
Crankshaft
main
bearings
-----
Replace
.
(
7
)
Engine
-
Rebuild
,
replace
.
(
8
)
Flywheel
---
Replace
.
(
9
)
Pistons
Grind and fit .
( 10 ) Piston pins
Fit .
( 11 )
Piston rings-
Fit
.
(
12
)
Piston
assembly
Replace
.
(
13
)
Timing
gears-
Replace
.
(
14
)
Timing
gear
cover
Replace
.
( 15 ) Valves-
Reface
,
reseat
,
insert
,
and
re
place
.
(
16
)
Valve
guides
Replace .
g .
Fuel system
.
( 1 ) Carburetor ..
Repair
and
rebuild
.
(
2
)
Fuel
pump
Repair
and
rebuild
.
(
3
)
Fuel
tank
Repair
.
(
4
)
Fuel
gage
----
Repair
.
h
.
Lubrication
system
.
(
1
)
Internal
oil
lines
Repair
,
replace
.
(
2
)
Oil
pump
----
Repair
,
replace
.
3
.:

TM 9–1706
5-7
ORDNANCE MAINTENANCE
SECTION III
TECHNICAL INSPECTION
Paragraph
Description.
5
Inspection
form
----
6
Practical
application
7
5.
Description
.
-
Technical
inspections
are
a
follow
-
up
and
check
on
organizational
maintenance
inspections
and
other
maintenance
functions
.
They
determine
whether
the
vehicle
should
be
continued
in
service
or
withdrawn
from
operation for
overhaul
.
These
inspec
tions
are
covered
in
AR
850–15
.
6. Inspection form.-W. D. , Q. M. C. Form No. 260 ( Technical
Inspection Report of Motor Vehicles ) is the standard and official form
for recording the inspection of all motor vehicles , including combat
vehicles of the Ordnance Department . The extent to which use is
made of this form or a modification of it
depends entirely
on the
technical ability of available personnel , the time factor , and the test
and shop equipment available .
7. Practical application . — a . External inspection of clutch .- ( 1 )
Test foot lever and make sure of proper mounting . Examine return
spring for wear or damage .
( 2 ) Run
vehicle
to
ascertain
if clutch
is
smooth
or
jerky
, or
slips
in
operation
.
b . Cooling system .- ( 1 ) Examine radiator and connections for signs
of
leakage
,
clogging
, or
damage
.
( 2 ) Inspect supporting bracket of fan and bushings and bearings .
( 3 ) Look at water pump and casing for cracks and leaks and make
sure gear on shaft is tight and shaft rotates freely .
c . Generator and regulator .— ( 1) Examine pulley for looseness .
( 2 ) Check all shielding conduits and connections .
( 3 ) Make
sure
all
mounting and
fastening
screws
are
tight
.
Ex
amine
armature
and
brushes
.
(
4
)
Check
voltage
and
correct
output
of
generator
.
( 5 ) Inspect regulator contact points for burning and gap distance ,
and check
tension
of
armature springs
.
(
6
)
Examine
regulator
case
for
cracks
.
d . Ignition system .- ( 1 ) Inspect all harness and terminals for
damage , wear , and looseness .
(
2
)
Examine
and
test
ignition
switch
.
(
3
)
Look
over
distributor
.
Test
for
loose
mounting
or
loose
con
nection
to
knob
on
dash
.
Remove
upper
half
shield
and
inspect
cap
1
4

TM 9–1706
HERCULES JXD GASOLINE ENGINE FOR SCOUT CARS 7-8
for cracks . Inspect breaker points and spring , high - tension rotor ,
and
metal inserts in cap for pitting and burning . Try cam for evidence of
wear , looseness , or breakage of governor springs .
e
.
Starting
motor
.-
(
1
)
Examine
all
connections
and
terminals
.
(
2
)
Inspect
and
test
starting
switch
.
(
3
)
Inspect
commutator
and
brushes
.
f . Engine
.—
( 1) Check
crankcase
, block
, head
, and
head
gasket
for
cracks
or leaks
. See
that
all
bolts are
tight
.
( 2 ) Remove cover and examine valve push rods , springs , and valve
clearances .
( 3 ) Run engine and listen for slapping pistons , knock at bearings ,
or knock due to presence of carbon .
( 4 ) Check oil pressure for steady and normal reading with engine
running .
g
.
Fuel
system
.-
(
1
)
Inspect
mounting
and
connections
of
fuel
pump
and
check
its
operation
.
Examine
fuel
tanks
for
leaks
or
damage
.
( 2 )
Examine
carburetor and
air
cleaner
. Try
all
screws
.
Inspect
connections
to
accelerator
and
dash
.
( 3 ) Check
fuel
gage
and
switch
.
.
h
.
Lubrication
system
.-
(
1
)
Check
oil
pressure
at
gage
.
(
2
)
Check
oil
line
connections
and
brackets
for
tightness
.
SECTION
IV
POWER PLANT TROUBLE SHOOTING AND TUNE - UP
WHILE INSTALLED
Paragraph
Trouble
shooting
8
Tune
-
up
9
8.
Trouble
shooting
.
Symptom
Cause
a . Engine
skips
or
misses
.
a . ( 1 ) Spark
plugs
cracked
or
dirty
.
(
2
)
High
-
tension
wires
broken
or
shorted
.
(
3
)
Distributor
cap
or
rotor
broken
,
damp
,
or
dirty
.
(
4
)
Faulty
distributor
points
,
condenser , or coil .
( 5 ) Valves adjusted too close
or badly worn guides .

TM
9–1706
8
ORDNANCE MAINTENANCE
Symptom
or
1
6. Lack of power in engine .
c .
Engine
vibrates
.
Cause
(
6
)
Leaking
head
gasket
.
(
7
)
Cracked
valve
seat
water
jacket
.
(
8
)
Improperly
adjusted
car
buretor
.
( 9 ) Air
leak
in intake
manifold
or
head
.
(
10
)
Partially
plugged
gas
line
.
6.
(
1
)
Skipping
motor
.
(
2
)
Motor
out
of
time
.
(
3
)
Needs
carbon
removed and
valves
ground
.
(
4
)
Low
or
uneven
compres
sion .
( 5 ) Motor overheats .
( 6 ) Mixture too rich .
( 7 )
Clutch
slips
.
( 8 )
Brakes
dragging
.
c . ( 1 ) Motor mountings loose
or
badly
worn
.
(
2
)
Bad
skip
in
motor
.
(
3 )
Ignition
and
timing
too
far
advanced .
( 4 ) Idle
adjustment
set too
rich .
d . ( 1 )
Circulation plugged
in
radiator , causing cool
spot
in
core
.
(
2
)
Radiator
and
block
dirty
,
retarding
circulation
.
(
3
)
Ignition
late
.
(
4
)
Brakes
dragging
.
(
5
)
Clutch
slipping
.
(
6
)
Fan
belt
slipping
.
(
7
)
Thermostat
bad
.
(
8
)
Leak
or
lack of
air
circu
lation .
( 9 ) Radiator fins bent or
clogged
.
d
.
Engine
overheats
.
6

TM 9–1706
HERCULES JXD GASOLINE ENGINE FOR SCOUT CARS
8
Symptom
e . Engine knocks .
f
.
Grinding
or
scraping
noise in
engine
.
Cause
e
.
(
1
)
Carbon
deposit
in
head
.
(
2
)
Spark
advanced
too
far
.
(
3
)
Automatic
spark
advance
stuck
.
(
4
)
Governor
weights
stuck
or
springs
weak
.
(
5)
Loose
wristpins
.
(
6
)
Connecting
rod
out
of
alinement
.
(
7
)
Loose
rod
bearings
.
(
8
)
Loose
main
bearings
.
(
9
)
End
play
in
cam
shaft
.
(
10
)
Loose
tappets
.
(
11
)
Sticky
valve
stems
.
(
12
)
Loose spark
plugs
.
(
13
)
Flywheel
loose
.
f
.( 1 )
Generator
bearings
worn
.
(
2
)
Water
pump
bearings
bad
.
(
3
)
Lower
fan
pulley
sprung
or
frame
sprung
so
trun
nion
hits
pulley
.
(
4
)
Broken
ring
or
piston
.
(
5
)
Flywheel
pan
bent
or
dirt
in
flywheel
pan
hitting
flywheel
.
( 6 ) Timing
chain
loose
and
rubbing
case
.
(
7
)
Oil
pan
nuts
in
flywheel
housing hitting against
flywheel .
q . ( 1 )
Piston ring gaps lined
up .
( 2 )
Piston rings worn
or
car
bon
in
ring
grooves
.
(
3
)
Vacuum
pump
diaphragm
cracked
or
porous
.
(
4
)
Rod
or
main
bearing
has
too much clearance .
( 5 ) Oil slinger clearance too
great
or
oil
slinger
oil
seal
in
housing
worn
out
.
(
6
)
Excessive
cylinder
wear
.
g
.
Engine
uses
too
much
oil
.
7

TM
9-1706
8-9
ORDNANCE MAINTENANCE
1
Symptom
Cause
h
.
Poor
gas
mileage
.
h
.
(
1
)
Worn
-
out
spark
plugs
.
(
2
)
Timing
late
.
(
3
)
Carburetor
dirty
and
out
of
adjustment
.
(
4
)
Motor
idles
too
fast
.
(
5
)
Brakes dragging
.
(
6
)
Clutch
slips
.
(
7
)
Erratic
driving
.
(
8
)
Automatic
choke
out
of
ad
justment
.
( 9 ) Air
cleaner
dirty
or
too
full
of
oil
.
(
10
)
Automatic
heat
control
frozen
closed
.
i
.
Engine
fails
to
start
.
i
.
(
1
)
Fuel
system
clogged
or
fuel
supply
exhausted
.
(
2
)
Defective
fuel
pump
.
(
3
)
Air
vent
closed
.
( 4 ) No spark at spark plugs .
j .
Generator
fails to
charge
. j . ( 1 ) Drive belt loose .
( 2 ) Voltage
regulator
out
of
order
.
(
3
)
Generator
not
operating
properly
.
( 4 ) Poor connections in circuit .
k . Starting motion of vehicle k . ( 1 )
Worn clutch linkage
.
jerky or delayed .
( 2 ) Worn
or
oil
- saturated
clutch
parts
—
may
also
be
out
of
adjustment
.
( 3 ) Play in universal joints .
9. Tune - up . - a . General . - Best results are obtained in an engine
tune - up by using a systematic approach rather than a hit - or - miss
search .
Before
a tune - up is
attempted
an engine
compression
test
should be made .
Successful tuning
is
impossible without
a fairly even
compression in the cylinders . Make compression test in the following
manner :
( 1 ) Remove all spark plugs from the engine . Turn ignition switch
off and fully open hand throttle .
8

TM
9–1706
HERCULES JXD GASOLINE ENGINE FOR SCOUT CARS
9
( 2 ) Insert an accurate compression gage in spark plug hole and
crank
engine
a few turns with
starting
motor ,
noting highest
gage
reading . Do this at each cylinder .
( 3 ) Compression should be the same in each cylinder within 5
pounds .
b . Procedure . — If compression is found to be correct in all cylin
ders , proceed with the tune - up in the following order :
( 1 ) Spark plugs .- ( a ) Spark plugs should be Champion , model J8 ,
type 14MM , or other make of same model and type .
(
6
)
Clean
the
plugs
thoroughly
.
(
c
)
Inspect
closely
for
cracked
porcelain
.
( d ) Set electrode gap between 0.025 and 0.028 inch . Use a round
feeler gage . Bend side electrode when regapping .
( 2 ) Battery
and
ignition
cables
.-
(a ) Clean
both
ends
of
each
bat
tery cable
thoroughly
.
See
that
connections
are tight
.
(
6
)
Inspect
ignition
system
high-
and
low
-
tension
cables
.
Ter
minal
on
each
end
must
be
clean
and
tight
.
If
insulation
shows
evi
dence
of
deterioration
,
cable
should
be
replaced
.
( 3 ) Distributor .- ( a ) Remove distributor cap and inspect it care
fully for cracks and burned posts .
( 6 ) Remove rotor , clean contact point , and make sure spring con
tacts secondary terminal .
( c ) Clean distributor points with a flat point file . Inspect care
fully and replace if cleaning does not remove pits and burns . Never
use emery cloth to clean points .
( d ) Adjust points with feeler gage to provide 0.018 to 0.020 inch
clearance . Be sure that breaker cam is in position to have points fully
separated .
( e ) Check condenser . A weak condenser usually results in burned
breaker points . A good check is the comparison test , replacing the
old with a good condenser and observing for contrast in the spark .
The spark from a faulty condenser will form an are or drag between
the
points
.
( f ) Check ignition coil with coil tester . Replace weak coil .
( 4 ) Ignition tuning . – Check ignition timing to be sure that No. 1
cylinder is firing according to flywheel markings . This is done by
attaching one end of a neon timing light to No. 1 spark plug and
grounding the other end . Run the engine at an idle speed and note
whether
the neon
flashes coincide
with the
markings
on the
flywheel
.
Distributor can be retarded or advanced until neon flashes are per
fectly synchronized with the flywheel markings .
9

TM
9–1706
9
ORDNANCE MAINTENANCE
1
1
1
( 5 ) Valve clearance .- ( a ) Remove the valve covers and adjust the
push rod screw to valve stem clearance to 0.006 inch on both intake
and exhaust valves . Be sure engine is thoroughly warmed before
adjustment
.
( 6 ) Make a visual inspection for evidence of cracked valve spring
coils or scored valve stems .
( 6 ) Carburetor .- ( a ) Remove bottom bowl of air cleaner by loos
ening winged nut on each side . Clean out all old oil and dirt . Refill
to oil level groove with new engine oil and install . Filtering element
should never be removed from cleaner .
( 6 ) Inspect carburetor flange and intake manifold gasket for leaks .
( c ) Check carburetor float level as described in section XI .
( d ) If necessary , adjust idling screw until engine runs evenly and
steadily with leanest possible mixture . Engine should be thoroughly
warmed before adjusting carburetor .
( e ) Clean carburetor fuel filter .
( 7 ) Fuel pump .- ( a ) The pressure from the fuel pump is measured
with a fuel pump pressure and vacuum gage . Connect adapter tee
into fuel pump outlet line and connect gage hose to adapter tee outlet
( fig. 193 ) . Normal pressure should be between 21/2 and 4 pounds .
This
gage
is also
used
to check
the
vacuum
condition
in
the
vacuum
pump
. Connect
hose
to
pump
inlet
. When
motor
is running
, this
vacuum
should
pull
from
8 to 10 inches
.
( 6 )
Remove
sediment
bowl
and
screen
for
cleaning
.
( c )
Inspect
for
worn
parts
and
replace
if
necessary
.
C. Vacuum tests . - A vacuum gage is a useful aid in an engine
tune - up . Before testing be sure that engine is thoroughly warmed .
The gage is attached at the rear of the intake manifold . Gage
readings indicate condition of vacuum existing in all the space of
the intake manifold between the throttle valve and the piston on the
suction stroke . Take
readings
with engine
running
at 500 rpm unless
otherwise specified
.
( 1 ) Normal engine . A normal engine pulls a vacuum of 18 to
21 inches . The vacuum reading will drop to about 2 inches when
the throttle is opened and will rebound to about 25 inches when throttle
is
closed
.
( 2 ) Steady needle , slightly low vacuum . - If the engine pulls a
vacuum of 13 to 16 inches with a steady needle , it would indicate the
possibility that the piston rings or oil is in poor condition . With
slight needle motion it would indicate late ignition timing .
10

TM
9–1706
HERCULES JXD GASOLINE ENGINE FOR SCOUT CARS 9-10
(
3
)
Steady
needle
,
low
vacuum
. -
If
the
vacuum
is
between
8
and
12
inches
,
the
trouble
might
be
caused
by
loose
valve
guides
,
worn
piston
rings
,
poor
oil
,
or a
manifold
leak
.
( 4 ) Steady needle , very low vacuum . - If the vacuum should drop
below 5 inches with a steady needle , the trouble is undoubtedly a
manifold leak .
(
5
)
Gradual
drop
.
-
If
a
normal
reading
is
obtained
when
the
engine
starts
and
the
needle
gradually
drops
,
the
trouble
would
probably
be
found
in
the
exhaust
system
-
probably
a
choked
muffler
.
( 6 ) Irregular
drop
, normal
vacuum
. - If the
engine
pulls a
normal
vacuum
but
the
needle
drops
at irregular
intervals
, the
trouble
might
be
caused
by
gummy
valve
stems
, rich
mixture
, lean
mixture
, or
defective
spark
plugs
.
( 7 ) Regular drop , normal vacuum . - A periodic drop or regular
drop with a normal vacuum indicates a chipped valve , a burned
valve , a leaky valve , or a head gasket leak .
( 8 ) Slow movement , low vacuum . - A low vacuum with a slowly
moving needle might indicate late valve timing , poor carburetor
adjustment
,
defective spark plugs
, poor
ignition
, or
gummy valve
stems .
(
9
)
Wide
variations
.
An
oscillating
needle
over
a
wide
range
with
the
variation
increasing
with
increased
speed
indicates
weak
or
broken
valve
springs
.
SECTION
V
CLUTCH
Paragraph
Description
---
10
Troubleshooting
11
Removal
of
assembly
.
12
Disassembly
13
Maintenance
14
Assembly
15
Installation
16
10. Description ( fig . 1 ) .— The clutch assembly is bolted to the
engine flywheel . It is the dry disk , single plate type , incorporating
a
mechanical vibration dampener
and
automatic adjustment
to com
pensate for wear .
a . Construction ( fig . 2 ) .— The flywheel forms a part of the clutch
housing and also acts as the front plate of the clutch . Friction ma
terial is riveted to both sides of the driven plate . Between the rear
lining and disk are six crimped spring steel segments which consti
tute a cushioning effect for smooth operation . A circle of six coil
11

TM
9–1706
10
ORDNANCE
MAINTENANCE
springs
is installed
in the
hub
of
the
driven
plate to
eliminate
tor
tional
vibration
. The
clutch
coverplate
contains
the
pressure
plate
,
release
levers
, lever
yokes
with
tension
springs
, and
adjusting
nuts
,
and
pressure
springs
and
their
retainers
. The
release
levers
and
the
lever
yokes
are
supported
on
needle
bearings
. The
pressure
springs
are
held
in cups
riveted
onto
the
cover
plate
and
recessed
into
the
pressure
plate
. Insulator
buttons
are
used
under
the springs
on
the
pressure
plate
to insulate
the
springs
from
heat
conducted
to the
pressure
plate
. Ball bearings
packed
with
grease
at assembly
are
used
on the
clutch
shaft
for
the
pilot
and
clutch
release
bearings
.
SCREW
,
CAP
-
BCAXICD
WASHER
LOCK
-
BECXIK
MEMBER
.
ASS'Y
LM
-
CM
-
4137
(
SCA
)
LM
-
CM
-
4515
(
SCB
)
M
COVERPLATE
ASSY
.
LM
-
CM
-
4348
RA PD
3235
FIGURE
1.
–
Clutch
assembly
installed
.
b .
Functioning . –
Depression of
the
clutch
pedal
moves
the
clutch
pressure
plate
away
from
the
driven
plate
, which
is
then
disengaged
from
the
engine
flywheel
drive
plate
, thus
releasing the
clutch
and
disengaging
the
transmission
from
the
engine
.
This
is
accomplished
by
the
connection of
levers
from
the
clutch
pedal
to
the clutch
throw
out
bearing
, which
is
mounted on
the
splined clutch
shaft
and
engages
with
the
pressure
plate
release
levers
that
control
the
move
ment
of
the
plate
.
Engagement
of
the clutch
is
the
reverse
pro
cedure
.
12

TM 9–1706
HERCULES JXD GASOLINE ENGINE FOR SCOUT CARS 10
1
FACING - LM - 0-3593
-PLATE -LM - C - 3567
FACING -LM - C - 3593 ( OR )
FACING - LM - C - 4263
PLATE -LM - C - 3594
ROLLER -LM - C - 3077
PIN , ROD - LM - C - 3141
PIN , COTTER - BFAXICD
NUT -LM -C -4345
SPRING - LM - C - 4346
YOKE -LM - C - 4344
PIN , ROD - LM - C - 3142
PLATE - LM - C - 3076
RIVET -LM - C - 3429
SPRING -LM - C - 3517 ( OR )
SPRING - LM - C - 3831
WASHER - LM - C - 3568
LEVER - LM - C - 3390
HUB - LM - C - 3677 - RA
WASHER - LM - C - 3569
BOLT -LM - C - 3523
SPRING -LM - C - 3522
WASHER - LM - C - 3569
NUT -LM -C - 3524
PIN - LM - C - 3521
RIVET -LM - C - 3006
-NUT - LM -C - 1404
PARTS
WHICH
WASHER
-
LM
- C -
1061
MAY
BE
USED
WEIGHT
-
LM
-
C
-
3328
FOR BALANCE
SCREW - LM - C - 3329
BUTTON - LM - C - 2085
SPRING -LM - C - 3431
-COVERPLATE - LM - C - 4343
RIVET - BMCXI
-CUP -LM - C - 3437
N
°
5835
LONG MFG
.
DIV
.
N ° 5875
Nº 63584
WHITE MOTOR CO .
N
°
312952
ORDNANCE
N
°
D
33797
CLUTCH
,
ASS'Y
RA FSD 1820B
FIGURE 2. — Clutch ( long ) , sectionalized .
13