TM-9-2520-254-34
TRANSMISSION, AUTOMATIC, ALLISON, MODEL TX100-1
TECHNICAL MAUAL; DIRECT AND GENERAL SUPPORT MAINTENANCE MANUAL
OCTOBER 1971
TM-9-2520-254-34 - Page 49 of 126
Table
4-1.
Troubleshooting-Continue d
9.
Malfunction
Transmission does not shift
automatically from intermediate
to high range.
Throttle
position
does
not
in-
fluence lockup or range shifts, or
main pressure.
10. Transmission
high
to
low
term ed iate.
downshifts from
range,
misses
in-
upshifts from low
11. Transmission
to high ran~e, misses in-
tern) ed iate.
~.).
f,ow. or
intermediate-range
clutch slips.
1:). High-range clutch slips.
14.
Low
fron
pressure.
gnvernor (G 1 I
Probable Cause
a. Rear governor (
G2 )
pressure low.
l,. Intermediate-lligb shift plug, shift
valve, or blocker plug sticking ( in
intermediate position 1.
c. Intermediate-l ligh shift valve
spring load excessive.
d.
Shift
linkage
disconnected
or
improperly adjusted.
e. Manual selector valve sticking in
1-2 position [ operator’s control
will not movel.
a.
Throttle
valve
linkage
discon-
1
n ected.
/}.
Throttle regulator valve sticking
in bore.
c. Throttle valve spring missing.
a. Intermediate-high shift plug, shift
valve, or blncker plug sticking
bore (in high position).
/,. Intermediate-high shift valve
spring missing.
a. Intermediate-high shift plug, shift
valve. {w blocker plug sticking in
bore (in high pnsitisml.
b. Intermediate-high shift valve
spring missing.
a. Main pressure low
/~. Clutch plates failed
c. Clutch piston seals leaking.
d.
Internal
leakage
in
hydraulic
system.
,,,. oiltransfert ubetoaffected clutch
if.
b.
I,.
if.
II.
,.
d.
not seated.
Refer to item 12a through
o above.
Intermediate-lligh shift valve
sticking:
does
not
move
full
length of stroke.
H(),,k-type seal rings
(21, fig. 5 -
62)
broken or missing.
Fnmt pitot tube damaged or lonse.
Frxmt g{wm-nor ring damaged.
Il]ternal oil leakage.
Check valve ball and
/
or
retainer
(76 and 75 fig. 5-82) damaged.
missing. or fouled.
(,. l.,,ss(}ff)ilsll]~[~ly togovernorring.”
a. Rear pitt)t tube damaged or loose.
/~. I{ear glwern~)r ring damaged.
c. Internal oil leakage.
(/. Loss {~f oil suppl) t~~ g{wernor ring.
Corrective Action
a .
l).
(,.
;1
b.
(,.
a .
b,
it.
l).
ii.
b.
(..
d.
(,.
a
b.
Refer to item 13 below.
overhaul (rebuild) or replace
control valve assembly (para 5-52
through 5-56) .
Check
spring
Inad
(table 6-2 ;
replace spring
(para 5-52 throug h
5-56) .
Connect and adjust linkage
(par a
5-63) .
overhaul (rebuild) or replace
control valve assembly (para 5-52
through 5-56) .
Replace spring
(para 5-52 throug h
5-56) .
overhaol (rebuild I nr replace
control valve assembly (para 5-52
through 5-56) .
Replace spring
(para 5-52 throug h
5-56) .
Replace spring (para 5-52 throug h
5-56) .
Replace spring (para 5-52 throug h
5-56) .
Refer to item 16 below.
overhaul transmission
(para 5- 1
through 5-63) .
overhaul transmission
(para 5- 1
through 5-63) .
overhaul transmission
(para 5- 1
through 5-63) .
Install tubes properly (fig. 5-127) .
I{efer t{) item I?ti through
c abnve.
overhaul (rebuild) nr replace
e{)ntrf)l valve assembly
(para 5-5 2
through 556 )
t. overhaul transmission
(para 5- 1
through 5-63) .
il.
overllalll transmission
(para 5- 1
through 5-63 )
/,. oierhaui transmission
(para 5- 1
through 5-63) .
f.. owerllatll transmission
(para 5- 1
through 5-63 )
{/. overhaul (rebuild) or replace oil
transfer plate assembly
(para 5 -
47 through 5-51) .
,,. Check oil sopply nrifice (item 16,
fig. 5-62) .
il.
‘1’igl)ten
bolts. disassemble
traosmissitm if tube is damaged
(para 5-1 through 5-63) .
/,. overhaul transmission
(para 5- 1
through 5-63) .
f. okerl]aul transmission
(para 5- 1
through 5-63) .
(/. Check oil supply orifice (item 5,
fig .
5-81) .
4- 3
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