TM 9-879
35-36
TROUBLE
SHOOTING
35.
TRANSMISSION
AND CLUTCH.
a.
Need for attention to
clutch and
controls is indicated by
clutch
slipping
under load or
dragging
(transmission gears
will shift hard
and
clash)
when in disengaged
position. In
either case, the first thing
to
be
checked is adjustment
of controls:
this being the
attention
usually
needed. Indication that
gear shifter
controls are
in
need of
adjustment
is when transmission
gears
"jump" out of engagement
when
accelerating vehicle
or
when under
heavy
pull, CAUTION:
This warning
must not be disregarded.
CO
Clutch Slips
When Fully Engaged.
Adjust clutch
control
(par. 48).
Adjust clutch spring tension
(par.
48).
If the
clutch still
slips,
replace either
the disks,
springs, or
both
(par. 48).
(2)
Clutch Drags When
Fully
Disengaged.
Adjust control
(par. 4S).
Adjust spring tension (par. 48).
(3)
Clutch Rattles When in
Disengaged
Position, Engine
Idling.
In this case,
the
clutch probably was not
properly
assembled.
Refer
to paragraph 51 a.
(4)
Transmission
"Jumps"
Out of Gear Upon
Accelerating
Vehicle, or When
Under
Heavy Pull. Adjust shifter
lever control
linkage
(par,
54).
(5)
Transmission
Gears
Shift Hard or Clash When Clutch
IS
Fully Disengaged. Adjust clutch
control
linkage
and spring
tension (par. 48). Make sure the
transmission mounting bolts and
units are tight
(pars.
57
and 58).
Drain and
fill
transmission
with
correct
lubricant
(fig.
10).
If the above
methods
fail to
cure the
symptom, refer to
a higher authority.
36.
WHEELS
.\ND CHAINS.
a.
Transmission Countershaft and Rear
Wheel
SproekelB
Show
Excessive Wear
on
One Side of Teelh.
Adjust
the
position
of the
rear wheel axle
to aiine the rear wheel
sprocket with the trans-
mission sprocket (par.
60).
If they cannot be alined, the
frame is
out
of alinemcnt, and the
trouble must be
referred to
a
higher
authority.
b.
Chains Produce
Grinding Noise with Engine Idling
and
Vehicle
on Rear Stand.
If cither chain is adjusted too tight, adjust
to
proper
tension (pars.
59 and 60).
Examine
both
chains
for presence
of
dirt and grit.
If dirty, clean and lubricate
them
(par.
20 c
(10)).
If
either
chain is dry,
adjust chain oilers (par. 61). Badly worn chains
and sprockets will cause
this symptom:
the
worn parts
must be re-
placed (pars. 62 and
63).
c.
Front
Chain
Dry
and/or Red (Rusty)
in Appearance. The
chain in
this condition
has
not been receiving enough lubrication.
69
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