Jeep UNIVERSAL CJ-2A - Page 143

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ELECT RICAL SYSTEM
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FIG. !59- STARTING MO TOR WITH CLUTCH DRIVE
1- Co nt oct Pl at e Nut
2- Swit ch Butto n
3
Sh irt Yoke
4- Bcndix Orlvc Spri n c.
swit ch co ntrol arm befor e the e lectrical co nne c tion
is made at the st a rting switch. Should the switch
cont rol a rm fail to completely mesh the pin i on, en-
gagement is co mpl et ed by the bendix drive spring
(Fig . 1 59) as soon as th e armat ur e starts to ro tate.
Wh en t he engin e starts , th e flywheel driv es the
pinion faster than the starting motor armature
bringing the over-running clutch int o actioP to
disengage th e pinion and prevent t he engi ne from
driving the armature at excessive speeds.
Sh o uld the overrunning clutch fail in service it will
be nec essa ry to install a new assembly.
Note that Model CJ-2A is eq uipped with Be ndix
type drive, ea rly CJ-3A with overrunning clutch
type, late CJ-3A, C] -3B, Dj-3A, C]-5 a nd CJ -6
with the B endix "Folo- Thru " type. Each ty pe
drive re quires a flywheel ring gear w ith a diffe rent
number of teeth. When replacing a flywheel or ring
gear be sure to count the teeth to assure installation
of the co rrect parts.
1- 60. Bend ix F olo-Thru Drive
• Lat e CJ·3A, CJ - 3B, C]-5, C]-6 , DJ -3 A
M ode ls CJ -3 A after ve hi cle serial No . 30973,
CJ -3B, DJ-3A, C] -5 and CJ -6 are e qu ipped with
the Bendix Folo- Thru type drive wh ich is desi gn ed
to overcom e prematur e demeshing of the drive
pinion from the flywheel rin g gear until a prede -
termined engine speed is reached. See Fig. 160.
No repairs or ad ju stments are poss ible on this dr i ve
and a comp l ete new unit must be installed if trouble
develops.
1-61 . Lubric a tion of Folo- Thru Dri ve
A periodic cleaning and relubrication of the drive
is ad visable, the freque n cy of which will depend on
the type of service to which the vehicle is sub -
jected and the locale of operat io n.
R emove the starting motor from the engine and
take off the outboard housing. The p inio n and
barrel assembly will be in the demeshed position
on the screwshaft. Do not move it forward until
after tha t port i on of the armature shaft ahead
of the pinion has been cleaned. If accidentally ro-
tated to th e outer end of the screwshaft it will
lock in that position and cannot be for ced back.
1 42
Do no t disassemble the drive for any reason .
Do not dip or wash t he d riv e in any clea nin g
sol
uti on .
Do no t remove the drive fro m the armature shaft .
Rem ove excess oil, grease or foreign matter from
t
he armature sh a ft by wi ping it wit h a clean c loth .
10859
FIG. 160- B ENDIX FOLO·THRU DR IV E
Dampen the cloth with kerosen e if necessary. A
lig
ht film of SAE 10 oil may then be ap plied to the
s haft .
Now rotat e t he pi nion a nd barrel assembly to the
fully extended position, thereby exposing the sc rew -
sha ft tr iple threads. Use a cloth dampened with
kerosene to wipe t hem clean. Do n ot u se gaso-
line or a ny commercial clean e r. If the dirt is
t hick and gummy, apply the kerosene w ith a small
brush. Til t the sta r ting moto r so th at a small
a mount will run under the cont rol nut. Relubricate
with a thin film of SAE 10 oi l. Use SAE 5 at ex -
tremely l ow temperatu res.
Reass e mbl e the sta rt ing motor to the engine with
the drive in t he exte nded position. Car ef ully mesh
t he pinion wi th the flywheel ring gear before
t ightening the starter motor mounting bolts. It may
require a slight rotation of the p inion to index it
into the ring gear. Wh en the engine starts the drive
pin ion will automatically demesh from the ring
ge ar and r et urn to its normal position.
1 -62 . Star t ing Sw it ch
Should a s ta rt ing motor fail to delive r maximum
power the fault may be due to voltage drop at the
sta rtin g switch contacts du e to cor rosi on or burn-
ing . Check the switch by co mp aring the voltage
at th e battery te rmin als and th at at the starting
switch terminals. Th e voltage drop should not
exceed .OS volts pe r 100 amperes.
Should it be im possib le to file the switch contact
plates to obtain a clean full surface contact th e
sw i tch should be repla ced .
M
ode ls CJ -2A, late CJ -3A, early C] -3 B , early
C] -5 and early CJ-6 a re e quipped wit h a con -
vent i ona l foot type starting switch. The terminals
a re exposed and this type switch may be checked
by sh orting ac ross the terminals. Whe n t his is don e
use care to make a good solid connec tion to pre-
vent arc ing.
The switch used on early M odel CJ - 3A is shown in
Fig. 159.
The shi ft yoke meshes the st arting motor pinion
wit h t he flywheel gea r after which the elec-
tr ical co nn ect ion is m ade t hrough swi tc h button.
Th e switch button is ad justable to vary distance
the shift yoke travels before making contact with
t he button . It is possib le to screw the bu tton out
far enough to pr event switch engagement through