Eaton Transmission T-955 Service Manual
Service Manual
Fuller Medium Heavy Transmissions
TRSM0202
October 2007
For parts or service call us
Pro Gear & Transmission, Inc.
1 (877) 776-4600
(407) 872-1901
parts@eprogear.com
906 W. Gore St.
Orlando, FL 32805
Service
Manual
·Operation
•
Lubrication
·Maintenance
·Repair
T-955
©Eaton
Corporation
Transmission
Div.
-1973
Series
Fuller®
Twin
Transmissions
Countershaft
Eaton
Transmission
Kalamazoo,
Corporation
Michigan
Division
l+MH·+•...__
_______________________
_
Table
Model Designations
Description
Specifications
Gear Ratios
Operation
Lubrication
Preventive
Disassembly Precautions
Disassembly Instructions
I.
Shifting Controls
A. Low Gear Shift Air System (T-955ALLModels)
B.
C. Shift Bar Housing Assembly
II.
Clutch Housing, Companion Flange and
Auxiliary Section
A. Removal
B.
C.
Front
III.
A. Auxiliary Drive Gear Assembly
B.
C. Right Countershaft Bearing Removal
D. Mainshaft Assembly
E. Left
F.
G.
H. Right Reverse Idler Gear Assembly
IV. Auxiliary
A. First-reverse
B.
C. First Speed Gear,
V. Auxiliary
A. Auxiliary
B.
C. Low Gear Shift Cylinder
D. Range Mainshaft
E. Low Speed Gear,
....................................
...................................
.....................................
...................................
Maintenance Check Chart
Gear Shift Lever Housing Assembly
Companion Flange or Yoke
Auxiliary Rear Section
Section
Left Reverse Idler Gear Assembly
Countershaft Bearing Removal
Input
Shaft and Drive Gear Assembly
Countershaft Assemblies
Auxiliary Countershaft Assemblies
and Rear Bearing Assembly
Sliding Clutch and First Speed Gear
and Rear Bearing Assembly
.............................
.................................
................
........................
.........................
..........
................
of
the Clutch Housing
.....................
.......................
...................
Section - T-955AL, T-955GL Models
Speed Sliding Clutch Gear
Output
Section - T-955ALL Models
Cou~tershaft
..........................
Output
Shaft
Assemblies
...................
Shaft
..............
.................
...............
.............
..........
............
...........
................
............
..........
.................
..........
.........
.........
of
10
12
.14
15
..
.16
.17
.18
22
23
23
24
26
28
29
.31
.32
.34
35
36
.37
.38
40
.41
.42
44
45
Contents
.3
4
.4
.5
6
Inspection
Gasket Locations
Torque Ratings
Reassembly Precautions
Reassembly Instructions
I.
Auxiliary Section - T-9 55 ALL Models
A. Low
B.
Rear Bearing Assembly
C. Low Gear Shift Cylinder Assembly
D. Range Mainshaft and First
E_
Auxiliary Coup.tershafts
II. Auxiliary
A. First
B.
Output
C.
Auxiliary Countershaft Assemblies
D. First-reverse Speed Sliding Clutch
III.
Front
A. Right Reverse Idler Gear Assembly
B.
Countershaft Assemblies
C. Drive Gear Assembly
D. Left Countershaft Installation
E. Mainshaft Assembly
F. Right
G. Left Reverse Idler Gear Assembly
H.
Auxiliary Drive Gear Assembly
IV. Clutch Housing, Companion Flange
and Auxiliary
A. Clutch Housing
B.
Auxiliary Rear Housing
C. Companion Flange
Shifting Controls
V.
A. Shift Bar Housing Assembly
B.
Gear Shift Lever Housing Assembly
C. Low Gear Air System (T-955ALL Models)
Air
System
Mainshaft Axial Clearance Chart
Tool Reference
...................................
..............................
...............................
..........................
........................
Speed Gear and
Section -T-955AL, T-955GL Models
Speed Gear and
Shaft and Rear Bearing Installation
Section
Countershaft Installation
Section
....................................
................................
Output
Output
.......................
.......................
...........................
or
Shaft.
....................
Speed Gear
...................
Shaft
....................
................
...............
...............
.....................
Yoke
.................
.................
...................
.............
.............
...........
...........
.........
............
............
............
...........
.....
......
.46
.4
.48
49
.50
.50
.52
.54
56
.58
60
62
64
65
66
68
70
73
74
81
82
84
86
87
87
88
92
93
94
9 5
96
7
2
Model
Designations
T-955AL
T0-955AL
T-955G L T-955ALL -Seven
T0-955ALL-
Unless stated otherwise, this manual applies to all models in the T-955 series which
includes: T-955AL, T0-955AL, T-955ALL, T0-955ALL, T-955GL
- Six speed,
- Six speed, overdrive.
Six speed, gathered ratios.
Seven
direct
speed,
direct
speed, overdrive.
drive.
drive.
NOTE
Illustrated
parts
lists
with parts numbers are available upon request.
3
Description
These
950
lb.-ft. torque capacity units are designed to take
advantage
gines and to
vehicles.
The T-955AL and T0-955AL six speed models have ratios
for construction vehicles, especially dump truck operation.
The 11.17 low gear provides ample reduction for starting
heavy loads, yet can
ping vehicle. The two reverse ratios, progressively shifted,
provide fast backing speeds plus deep reduction for job-site
spotting. The T0-955AL overdrive model
drive ratio where heavy duty drive axles are needed and
ratio choices are limited.
of
the power curve
give
the ratio spread necessary for construction
be
of
the high torque
shifted progressively without stop-
gives
rise
en-
a .65 over-
Specifications
Speeds
T-955AL, GL: 6 forward speeds, 2 reverse
T-955ALL: 7 forward speeds, 3 reverse
The T-955ALL and T0-955ALL seven speed models,
cially suited for
the reduction for extremely adverse conditions, also ratios
for curbing and paving. Three reverse ratios
stockpiling,
T0-955ALL overdrive model
speeds when heavy duty axle ratio choice
The T-955GL model has special
vehicles operating primarily on highway.
Torque
Clutch
both
job-site
Rating
Housing
dump and mixer operations, provide
give
work and load spotting. The
is
available to obtain highway
is
limited.
"gathered" ratios for
950 lb.-ft.
Size
SAE
No. 1, 2 aluminum
espe-
a range for
Power
PTO
Take-Off
Right Side: regular duty, 6-bolt type
45
tooth
PTO gear
Bottom: heavy duty, 8-bolt type
4 7
tooth
PTO gear
Gear
Relative
T-955AL: .533, right side and
T-955GL: .700, right side and
T0-955AL: .820, right side and
T-955ALL: .533, right side and
T0-955ALL: .820, right side and
Speed
to
Input
bottom
bottom
bottom
bottom
bottom
R.P.M.
Length
splines
(from
on
T-955AL, GL: 30
T-955ALL: 34
face
tailshaft)
Weight
T-955AL, GL: 580 lbs.
T-955ALL: 646 lbs.
Oil
Capacity
T-955AL, GL:
T-955ALL: 28
(pints)
of
25
clutch
7/8"
1/16"
housing
to
end
of
4
T-955AL
SPEED RATIO %STEP
6th
1.00
SPEED RATIO %STEP SPEED RATIO %STEP
6th
T0-955AL
54% 54%
GEAR RATIOS
5th
1.54
5th
1.00
55% 54% 43%
4th
2.38
4th
1.54
58% 58%
3rd
3.75
3rd 2.44 3rd 2.99
69% 69% 62%
2nd 6.35
2nd
4.13
76%
1st 11.17 1st 7.26
Hi
Rev.
Lo
Rev. 11.40
6.48
Hi
Rev. 4.21
Lo
Rev. 7.41
.65
T-955GL
6th
1.00
31%
5th
4th
1.31
1.87
60%
2nd 4.84
76% 76%
1st 8.51
Hi
Rev.
Rev.
4.94
8.69
Lo
T-955ALL
SPEED RATIO
6th
5th
4th
3rd
2nd
1st
Lo
Hi
Rev.
Lo
Rev.
Lo-Lo Rev.
1.00
1.54
2.38
3.75
6.35
11.17 1st
26.54
6.48
11.40
27
.09
RATIOS
GEAR
T0-9SSAL
%STEP SPEED RATIO
6th
54%
5th
1.00
%STEP
.65
54%
55% 54%
58%
4th
3rd
69%
2nd
76%
1.54
58%
2.44
69%
4.13
76%
7.26
138% 138%
Lo
Hi
Lo
Rev.
Rev.
17.25
4.21
7.41
Lo-LoRev. 17.61
5
Operation
In the following instructions it is assumed that the driver
coordinate the necessary movement
of
the shift lever and clutch pedal
either direction, up or down.
Six
Speed Models
T-955AL, T-955GL & T0-955AL Models
To shift from neutral to:
1st
- shift thru 2nd.
Reverse
T0-955AL
lo-
the
shift thru reverse-hi
On overdrive model
5th & 6th
speed positions are reversed
1.
Start engine with gear shift lever in the neutral position.
2. To start vehicle moving, shift into the 1st speed position.
This
is
done by moving the gear shift lever through the
gear
2nd speed
may be necessary to feather clutch
2nd).
Move
position with the clutch disengaged (it
to
move lever into
lever through the 2nd speed gear position to
the extreme left, then push lever forward into 1st gear.
NOTE:
the neutral position between
neutral position
While
moving the lever into first
can
be used
2nd
and 1st
at
stop lights, etc.
you
may feel
gears.
This
is
familiar with motor trucks and tractors, and that he can
to
make progressive and selective gear engagements in
3. After vehicle has gained sufficient speed in 1st gear, shift
lever into the 2nd speed position.
4. Shift from 2nd to 3rd
by
moving lever from the extreme
right in the second speed gear position into the 3rd
speed position.
NOTE: A spring and plunger will move the gear shift
lever to the extreme right
When
shifting from 1st to
in
the
2nd
speed
gear
2nd
the gear shift lever will be
position.
moved to the extreme right position; when shifting from
2nd
to 1st, operator must move lever to the extreme left
in
position while
2nd gear position against the spring
pressure.
5. Shift on upward through
pattern.
On
overdrive models, the
4th,
5th
and 6th in the shift
5th
and 6th speed gear
positions are reversed.
Reverse and
To
shift into reverse, move the gear shift lever into the
Lo
Reverse
reverse gear position.
To
shift into Lo reverse; first shift into reverse, then move
lever to the extreme left and forward into the lo reverse
position (it may be necessary
to
feather clutch to move
lever into reverse.)
6
Seven
Speed
Models
T-955ALL and T0-955ALL Models
To shift
from
- shift thru
neutral
2nd.
1st
to:
Overdrive
T0-955ALL
the
5th
positions are reversed.
Shift
lo-lo
selector lever
to
"In"
position for
lo-lo
and
lo-lo
reverse.
models
and
6th
speed
Reverse,
To
Reverse
Lo
and
Lo-Lo
shift into reverse, move the gear shift lever into the
reverse gear position.
To
shift into Lo reverse: first shift into reverse, then move
lever to the extreme left and forward into the Lo reverse
position (it may be necessary to feather clutch to move
lever into reverse.)
Lo
To shift into Lo-Lo reverse: first shift into
switch the Lo-Lo selector from
diately disengage and re-engage clutch.
reverse to
Lo
reverse: switch selector from
"Out"
To
reverse, then
to
"In"
and imme-
shift from Lo-Lo
"In"
to
"Out"
and immediately disengage and re-engage clutch.
1.
Start engine with gear shift lever in the neutral position.
To
start vehicle moving under normal conditions, shift
2.
is
into the 1st speed position. This
done by moving the
gear shift lever through the 2nd speed gear position with
the clutch disengaged (it may be necessary to feather
clutch to
move
lever into 2nd.)
Move
lever through the
2nd speed gear position to the extreme left, then push
lever forward into 1st gear.
NOTE:
the neutral position between 2nd and 1st
neutral position
3.
To
While
moving the lever into first
you
may feel
gears.
can
be used at stop lights, etc.
shift into Lo-Lo under adverse conditions: To shift
into Lo-Lo the gear shift lever must be in the 1st speed
gear position.
"In"
and immediately disengage and re-engage clutch;
transmission will shift into Lo-Lo. To shift out
switch selector from
Switch the Lo-Lo selector from
"In"
to
"Out"
and immediately
"Out"
of
disengage and re-engage clutch.
in
4. After vehicle has gained sufficient speed
1st gear, shift
lever to the 2nd speed position.
5.
Shift from 2nd to 3rd by moving lever from the extreme
right in the second speed gear position into the 3rd
speed gear position.
NOTE: A spring and plunger will move the
lever to the extreme right
in
the 2nd speed
gear
gear
position:
when shifting from 1st to 2nd the.gear shift lever will be
moved to the extreme right position; when shifting from
2nd to 1st, operator must move lever to the extreme left
position while
in
2nd
gear
position against the spring
pressure.
6.
Shift on upward through
pattern.
On overdrive models, the
4th,
5th
and 6th in the shift
5th
and 6th speed gear
positions are reversed.
This
to
Lo-Lo,
shift
NOTE: Reverse
gears
can
be shifted progressively without
stopping vehicle.
Alternative Method
and
T0-955ALL
1.
As
in the previous instructions, start vehicle with gear
of
Upshifting the
Transmissions
T-955ALL
shift lever in neutral and shift into the Lo-Lo position,
moving the selector switch to the
"In"
position.
2. After vehicle has gained sufficient momentum, shift upward through the shift pattern through 2nd, 3rd,
and
5th
to 6th, KEEPING THE SELECTOR
TO
THE
"IN"
POSITION.
4th
SWITCH
3. When in 6th and ready for the next UPSHIFT, switch
the
selector
immediately move the gear shift lever
gear position. Remember this
4. Continue upshifting through
NOTE:
When
shift pattern with the selector switch to "JN")
sary
to move the
make the upshift. For instance,
selector from
4th;
if
you
are
and move
gear
U pshift Gear Positions Using Alternative Method
switch from
is
5th
using this method
gear
shift lever two gear positions lower to
if
"IN"
to "OUT", and move
in
5th, switch selector from
shift lever to 3rd.
"IN"
to
"OUT" and
to
the
4th
an upshift.
and 6th.
of
shifting (by using the
it
is
you
are
in
6th, switch
gear
shift lever to
"IN"
to "OUT"
speed
neces-
of
Shifting
6th
5th
6th
__
5th
_2!.--3rd
4th
4th
3rd
Shifted with selector to "OUT"
2nd
Lo-Lo
t
Shifted
with Selector to
"IN"
7
To
Convert
From
T-955AL
To
T0-955AL,
To convert from an T-955AL or T-955ALL to
drive
model T0-955AL or T0-955ALL the fifth speed gear
on the mainshaft and mating gears, one on each countershaft, are interchanged with the main drive gear and mating
countershift drive gears.
The transmission front section must be completely
assembled to make the change
as
the drive gear on each
INTERCHANGE THESE TWO SETS OF GEARS.
or
T-955ALL
an
over-
dis-
(3 Gears
To
T0-955ALL
countershaft must be removed. When reassembling make
sure gear hubs are in the right position
detailed reassembly section
Extra parts, other than gaskets, are not needed to make
the conversion. A new drive gear bearing nut may be
needed
in
each set)
as
this part may be damaged during removal.
of
this manual.
as
described
in
the
FRONT SECTION OF T-955AL
8
AND
T-955ALL
Special
Procedure
For
Changing
In some cases in field repair it may be necessary to
place only the input shaft due to clutch wear on the splines.
In these instances the input shaft can be removed
out disassembling the transmission other than removing the
shifting bar housing. Removal
tional. Following
is
the detailed procedure:
of
the clutch housing
Clutch
re-
with-
is
op-
Disassembly
1.
Remove gear shift lever housing and shift bar housing
from transmission.
2. Remove the front bearing cover.
3. Engage the mainshaft sliding clutches in two gears and
remove the drive gear bearing nut.
4.
Move
the drive gear assembly
and remove the drive gear bearing.
5. Remove the washer from input shaft.
6.
From the front, remove the snap ring from
gear.
7.
Pull the input shaft forward and from splines
gear.
as
far forward
as
ID
possible
of
drive
of
drive
(Input)
Shaft
Reassembly
1.
Install new input shaft into splines
enough to expose snap ring groove in
of
2. Install snap ring in ID
3. Install washer on shaft.
IMPORTANT
4.
contact end
between rear
speed gear. When installing bearing this will hold input
shaft in position
5. Install drive gear bearing on shaft and into case bore,
making sure blocking remains in place.
6. Remove blocking from mainshaft and install the drive
gear
bearing nut, left-hand thread.
threads
7.
Peen nut into milled slots in shaft.
8. Re-install front bearing cover, shifting bar housing and
gear shift lever housing.
NOTE:
input shaft only.
disassembly
-
Move
of
input shaft in hub
of
to
of
nut and shaft.
The above instructions
of
the front section must be
drive gear.
the sliding clutch gear forward to
sliding clutch and front
seat the bearing properly.
To
change the drive
of
drive gear just far
ID
of
drive gear.
of
drive gear. Block
of
Use
Loctite sealant on
are
for changing the
gear,
made.
the fifth
complete
9
Ei.!j1ffo.l,I
___________________________
_
Lubrication
RECOMMENDED LUBRICANTS
Heavy-duty engine oil. Make sure to specify heavyduty type meeting MIL-L-2104B specifications.
Mineral gear oil inhibited against rust, oxidation and
foaming.
Extreme pressure oils under some conditions might
form carbon deposits on gears, shafts, bearings and
synchronizer discs, and may also glaze friction
faces
of
synchronizer discs - conditions which will
result in transmission malfunction and premature
failure.
and E.P. oil
mineral oil or heavy-duty engine oil
It
is
suggested that
is
being used, a change should be made to
if
these conditions exist,
as
recommended.
sur-
ON-HIGHWAY
Type
Heavy Duty Engine
MIL-L-2104B
Mineral Gear Oil
Rand
0 Type
Mild
E.P.
Oil
Sulfur-chlorine-lead type)
MIL-L-2105B
OFF-HIGHWAY
Heavy Duty Engine Oil
MIL-L-2104B
Special Recommendation - For extreme cold weathe1
where temperature
Heavy Duty Engine Oil
MIL-L-2104B
(except
is
Oil
AND
consistently below
VEHICLES
Grade Temperature
SAE 50 Above + 1
SAE
SAE90
SAE
SAE90
SAE
MINING
SAE 50
SAE30
SAE
Below + 1 ooF.
30
Above +
80
Below + 1
Above + 1
80 Below + 1
EQUIPMENT
Above + 1
Below + 1
o°F.
20W
Below ooF.
o°F.
I0°F.
o°F.
o°F.
o°F.
o°F.
o°F.
FULLER TRANSMISSIONS
ate in a bath
parts have built-in channels where needed, to help lubricate bearings and
shafts.
Thus,
followed:
To keep the gear oil clean between oil changes use the Fuller Transmission
Gear
Oil Filter which can be attached to the right-side power take-off opening. This assembly includes a replaceable filter element that removes the
accumulation
lubricant.
of
oil circulated by the motion
all
parts will be amply lubricated
1. Maintain oil level. Inspect regularly.
2.
Change
3.
Use
the correct
4. Buy from a reputable dealer.
of
metallic particles, road dirt and grit deposited in the
are designed
oil regularly.
grade
so
that the internal parts oper-
of
gears and shafts. Grey iron
if
these procedures are closely
and
type of oil.
10
Fuller
Transmission Gear
Oil
Filter
Draining Oil
Inspection
To
drain the transmission remove the drain plug at
the bottom
of
the front case. Drain oil when transmission
is
warm. After the transmission has been drained and before it
is
refilled, the
clean flushing oil or kerosene.
pound
if
pressure lubrication pumps unless pump
unit
case
should be thoroughly flushed with a
Do
not
use
flushing com-
is
equipped with side or front mounted
is
removed and
opening covered with plate. Clean both drain plugs before
reinstalling.
Refilling
In order to assure complete filling
of
the transmission
with oil, the following two methods may be used:
1)
At any inclination: Plug the fill hole in the front
case
and add entire quantity through opening in shift bar
housing. The transmission must be
completely drained
before using this method in order to avoid overfilling.
At
upgrade inclinations from 0 through 3 degrees:
2)
Add sufficient quantities through the fill hole to level
the oil at the
bottom
of
the fill hole.
Gear oil
opening at all times.
Highway
Off-highway Service
Gear Oil Change
Change the gear oil on
is
to be kept even with the level
Check at the following intervals:
Service
.....................
....................
all
new equipment after the first
of
the filler
.1,000 miles
.40 hours
3000 to 5000 miles (on-highway), or first 40 hours (off-
highway); thereafter, make oil changes
Highway Service
Off-highway
.....................
Service
Logging and associated operations
as
follows:
......
25
,000 miles
1,000 hours
Dirt moving, mining and
associated operations
............
250 to 500 hours,
as indicated by operation and contamination
lubricant.
of
Do
not overfill. Overfilling will cause the oil to be
forced out
Adding Oil
intermixed because
made through the fill hole
the fill hole with the transmission at a 0
of
the
case
through the mainshaft openings.
It
is
recommended that types and brands
of
possible incompatibility.
Additions
of
oil during servicing operations should be
to
level the oil at the
of
oil not be
bottom
to
3 degree
of
upgrade angle.
Operating Temperature
It
is
imperative that the operating temperature
transmission does not exceed
250°F.
Extensive operation at temperatures exceeding
will result in rapid breakdown
of
the oil and shorten trans-
of
the
250°F.
mission life.
Transmissions used in stationary equipment, or in
vehicles operating at slow road speeds, may have to be
so
equipped with external coolers
ture
is
not exceeded.
that the
250°F.
tempera-
Special Recommendation
The above oil inspection and change periods are based
on the average
tions listed.
make a periodic lab analysis
contamination based on the individual's own operating
use
and operating conditions for the applica-
It
is
recommended that the individual owner
of
the lubricant to determine
conditions. After this has been determined, the individual
owner can then set his own inspection and oil change
periods.
Clutch Release Bearing
Follow
vehicle manufacturer's chassis lubrication
recommendations.
Oil Filter
If
so
equipped, replace filter element at each oil
change; clean filter element housing.
11
'i'fjij.iiijf
1
f
M
. l!IW'Sl!t?t''W'l''Sii.
------
12
Preventive
Maintenance
Check
Chart
Preventive
Maintenance
CHECKS WITHOUT PARTIAL
DISASSEMBLY OF
CHASSIS OR
1.
Air
System
a.
Check for leaks, worn air lines, loose connections and
capscrews,
2. Clutch
a.
Check
looseness.
all
3. Clutch
a.
Remove hand hole cover and check radial and axial
clearances in release bearing.
b.
Check relative position
ing
with thrust sleeve on push type clutches.
4.
Clutch
a. Pry upward on shafts to check wear.
If
excessive movement
b.
mechanism and check bushings in bores and wear on
shafts.
5.
Gear
a.
Change at specified service intervals.
b.
Use
only gear oils
tion.
6.
Filler
a.
Remove filler plug and check level
fied intervals. Tighten filler and drain plugs securely.
and
Connections
See
Air Systems, page 94.
Housing
capscrews in bolt circle
Release
Pedal
Mounting
Bearing
of
Shaft
is
Lubricant
as
recommended.
and
Drain
Plugs
CAB
(T-955ALL)
of
clutch housing for
thrust surface
and
Bores
found, remove clutch release
of
release bear-
See
Lubrication
of
lubricant at speci-
sec-
Check
8.
Gear
Shift
a.
Remove the gear shift lever housing assembly from
transmission.
b.
Check tension spring and washer for set and wear.
c.
Check the gear shift lever pivot pin and pivot pin slot for
wear.
d.
Check
bottom
of
slot
contact points with shift lever.
yokes and blocks in shift bar housing for wear
CHECKS WITH
Chart
Lever
Housing
end
of
gear shift lever for wear and check
Assembly
DRIVE
LINE
DROPPED
Universal
9.
a.
Check for tightness. Tighten
CHECKS WITH UNIVERSAL
Joint
Companion
to
recommended torque.
Flange
JOINT
Nut
COMPANION FLANGE REMOVED
10. Output Shaft
a.
Check splines for wear from movement and chucking
action
of
the universal joint companion flange.
Pry upward against output shaft to check radial clear-
b.
ance in mainshaft rear bearing.
11. Mainshaft
a. Check oil seal for wear.
Rear
Bearing
Cover
at
7.
Gear
Shift
Lever
a.
Check for looseness and free play in housing.
loose in housing, proceed with Check No. 8.
If
lever
is
13
General
Precautions
IMPORTANT: Read this section before starting
the
detailed disassembly procedures
It
is
assumed in the detailed disassembly instructions
that the lubricant has been drained from the transmission,
the necessary linkage and air lines removed and the transmission has been removed from the chassis. Removal
gear shift lever housing assembly
instructions; however, this assembly must also be removed
from transmission before removing unit from vehicle.
is
included in the detailed
of
the
for
Disassembly
ASSEMBLIES - When disassembling the various assem-
2.
blies, such
bar housing, lay
sequence
assembly and reduce the possibility oflosing parts.
as
the mainshaft, countershafts and shifting
all
parts on a clean bench in the same
as
removed. This procedure will simplify re-
The two control
the
transmission before removing unit from vehicle.
(T-955ALL)
Follow each procedure closely in each section, making
use
of
both
the text and pictures.
1.
BEARINGS - Carefully wash and relubricate
ings
as
removed and protectively wrap until ready for
use. Remove bearings with pullers designed for this
purpose.
REMOVED
CHISEL,
OUTER
BEARING
WITH
DAMAGED
RACE.
valve
air lines must be disconnected at
BEARING
REMOVED WITH
DAMAGED
PUNCH,
SHIELD.
all
bear-
oo
3. SNAP RINGS - Remove snap rings with pliers designed
for this purpose. Rings removed in this manner can be
reused.
INPUT SHAFT - The clutch or input shaft can be re-
4.
moved without removing the countershafts, mainshaft
drive gear.
5.
CLEANLINESS - Provide a clean place
important that no dirt or foreign material enters the unit
during repairs. The outside
fully cleaned before starting the disassembly. Dirt
abrasive and can damage bearings.
WHEN
6.
etc., with restraint. Movement
ed.
solidly.
work.
DRIVING - Apply force to shafts, housings,
Do
not apply force after the part being driven stops
Use
soft hammers and bars for
of
the unit should be care-
of
some parts
to
work.
is
all
disassembly
or
It
restrict-
is
is
14
DISASSEMBLY
I.
Shifting
Gear
Shift
Lever
----
INSTRUCTIONS
Controls
Low
Gear
(T-955ALL
/Gear
Air
System
MODELS)
Shift
Shift
Lever
Bar
Housing
Housing
15
l·HfHH,,'MW
_________________
_
A. Removal of the Low Gear Shift
LowGearShift
Coo"ol
V•"'•--
~
u-
11
i i
•
Y."
l.D.
Air
\___
Lines IF'
Air
System
+·
Tee
. . I
(T-955ALL
Cap screw
(2)
Reducer Bushing
Fitting
-o-u-Rmn-
\
Models)
~
'
l u U-BoU
'--
- -
--
----
Filter
-Air
Bracket
Filter
-.
Y." I .D.
Air
Line
1.
Disconnect
of
the
the
air line between
air filter and
the
the
low gear shift cylinder.
L~
G~'
tee
fitting forward
Shrr.
Cyllod"
~'\''
c~"~
Turn
out
2.
bracket assembly.
the
the
filter, refer
'icj
two
capscrews and remove
For
disassembly and maintenance
to
page 94.
the
air filter and
of
16
B.
Removal and Disassembly
of
the Gear
Shift
Lever Housing Assembly
ca
Tension Washer
~
';:;;,,;o"
Spd,_
2. Mount
housing and using a large, heavy-bladed screwdriver, pry
the
one
3. Remove
pull
the
assembly in a vise, upside down,
tension spring
coil
at
a time. Remove
the
tension spring washer
the
lever
up
and
up
and over
from
the
the
housing.
the
lugs
in
spring from
from
the
by
the
housing,
the
housing.
housing and
the
1.
Turn
out
the
gasket seal and lift
shift bar housing.
remove
the
rubber
four
capscrews, jar lightly
the
gear shift lever housing from
Turn
the
shift hall from
dust
protector.
to
the
break
the
the
lever and
4.
5. Remove
17
If
necessary, remove
the
housing.
the
0-ring
housing.
the
from
nut,
pivot pin and washer from
the
groove
in
the
top
of
the
C. Removal and Disassembly
--
Capscrews
- Tensions Spring Cover
of
the
Shift
Bar Housing Assembly
Plug
@
GasketO
'
00
1
/e
Reverse~
Light
Pin
Capscrew
(161
/
I
11
/ Tension Balls
I/
00
Tension Springs
@Plug
(41
(41
Shift
/
Bar Housing
Gasket
1st
Low
Reverse Block,
Reverse
Shift
Bar
And
Yoke
2nd
Speed~~
Bar and
Yoke
3rd -4th
Bar and
Speed
Yoke
~/
'
~
18
Shift
Lockscrew
\
----~~
lunger
-Spring
\
--Plug
1.
Tum
out
the
tension spring cover.
two
retaining capscrews
and
remove
the
4.
If
necessary, remove
the
housing.
the
reverse light pin
and
plug
from
2. Remove
Use a magnet
3.
under
the
the
halls
moved
the
by
from
four
tension springs.
to
remove
springs.
tipping
the
transmission.
the
If
a magnet is
the
housing
four
tension balls located
not
available, remove
after
it
has
been
re-
5.
6.
19
If
necessary, use pilers
breather.
Tum
out
the
16
gasket seal
transmission.
and
or
vise-grips
retaining capscrews,
lift
the
shift
bar
to
remove
jar
to
housing
the
break
from
air
the
the
C.
Removal and Disassembly
of
the
Shift
Bar Housing Assembly - continued
NOTE:
place all parts in their
bench, placing
each bar. Bars
neutral position
preventing removal.
7. Mount
shift bar
lockscrew and pull
from
sary, use a screwdriver
the
In
the
the
shift
to
the
the
shift
spring and plunger from
following steps
order
the
correct shift yokes and blocks
not
being removed
or
interlock parts will lock
bar
housing in a vise with
top
and
the
short (5th-6th speed) shift bar
yoke
and web
to
for
of
rentoval
cut
all lockwires.
of
tum
out
the
shift yoke.
ease
of
on
must
he
the
housing.
the
plug and remove
reassembly,
a clean work-
on
kept
in
the
the
bars,
the
shortest
Tum
out
the
If
neces-
9. Turn
out
shift bar from
and block.
the
two
lockscrews and pull
the
web
of
the
housing and
the
2nd-reverse
the
shift
yoke
8. Turn
bar from
clears
the
out
the
bar.
the
lockscrew and pull
the
yoke
and web
web
the
interlock pin will fall from
of
the
3rd-4th speed shift
the
housing.
As
the
the
bore
bar
in
10. Turn
11. Three interlock balls are located
out
the
two
lockscrews and pull
verse shift bar from
shift
yoke
and block.
housing. These will fall from
bar
is
removed
web.
the
or
may have
web
20
of
the
to
the
in
web as
he
the
1st-low re-
housing and
the
web
of
the
last shift
removed from
the
the
the
12. Mount
remove
13. Turn
spring retaining plate.
the
the
out
the
1st-low reverse shift block in a vise and
two
sets
of
lockwires.
two
lockscrews evenly and remove
the
15.
Turn
out
retaining plate.
16. Remove
from each block.
the
the
two
lockscrews and remove
two
blocks and remove
the
the
interlock pin
block
14. Remove
the
two
springs
from
the
bores.
21
'·BiHi+"M
1
lli'NNh.iiH'·
1
·B+b'+'·m
1
1
•
iM.t.iiifiiiif
Biiii"+I..._
_________
_
II.
A. Removal
1.
If
so equipped, remove
sembly from
Clutch
of
the Clutch Housing
the
the
front
bearing cover.
Housing,
Auxiliary
upshift clutch brake as·
Companion
Section
Flange
and
2.
Turn
out
clutch housing
the
four
bolts and six
to
the
transmission.
nuts
which
attach
the
3. Use a rubber mallot
and
off
the
front
bearing cover and studs.
to
tap the
clutch housing forward
22
B.
1.
Turn
C.
Removal
Removal
the
elastic stop
of
the Companion Flange
nut
from
the
of
the
Auxiliary
Rear Section
Disassembly
or
output
shaft.
Yoke
-
Clutch
2. Pull
Housing,
the
the
output
or
spacer
Companion
companion flange
shaft and remove
from
the
flange
or
Flange,
or
yoke
the
yoke.
Auxiliary
from
the
speedometer drive gear
splines
Section
of
1.
Turn
out
the
19
capscrews retaining
to
the
front
case.
NOTE: With T-955AL and GL series transmissions,
may be necessary
right corner
the
top
right retaining capscrews.
2.
Insert
three
flange
of
break
the
from
the
front
imately
Y2".
the
to
remove
of
the
auxiliary section
puller screws
auxiliary section and tighten evenly
gasket seal
case. Move
and
in
move
the
the
auxiliary section
the
plate located
to
allow access
the
tapped holes in
the
rear section away
rear housing back approx·
at
the
it
top
to
the
to
3. Remove
23
the
top
the
rear housing
NOTE:
the
output
the
puller screws and
of
the
rear housing. Use a chain hoist
off
It
is
advisable
shaft
to
attach
the
front
case dowel pins.
to
re-install
avoid damage
a hanger bracket
the
elastic stop
to
the
threads.
to
move
nut
to
on
Ill.
Front
Section
A. Removal and Disassembly
Bearing Retaining Snap Ring
of
the
Auxiliary Drive Gear Assembly
Retaining
Snap Ring
Capscrew (6)
1. Cut
retaining
case.
the
two
lockwires and
the
auxiliary drive gear assembly
turn
out
the
six capscrews
to
the
front
24
2.
Remove
mainshaft.
the
snap ring
from
the
groove
in
the
rear
of
the
3. Insert three puller screws
retaining ring and tighten evenly
to
the
rear and
4. Remove
the
auxiliary drive gear.
from
the
snap ring from
the
case bore.
in
the
the
to
groove
tapped holes
move
the
on
the
of
the
assembly
front
of
5.
Support
use a mall and driver
the
the
assembly
hearing. This will free
in
to
a vise
drive
the
by
the
retaining ring and
the
gear
down
retaining ring.
and
from
25
B.
Removal
of
the
Left
Reverse
Idler Gear Assembly
Bearing
Needle Bearing \
\
Inner
Race
Rear Washer
1.
Remove
the
snap ring
mainshaft reverse gear.
2. Move
against
the
reverse
sliding
the
reverse gear forward
the
1st speed gear, engaging
and
clutch
gear.
1st
speed gears
from
the
ID
on
with
of
the
the
the
the
hub
mainshaft
splines
of
splines
of
of
the
and
both
the
3. Remove
26
the
elastic
the
idler shaft.
4.
Use inside jaw pullers
tershaft
auxiliary
moved
front
countershaft
at
this
time.
stop
bearing
nut
to
from
front
and
remove
the
bearing
washer
the
left
case
from
the
end
auxiliary coun-
bore.
The
may
also be re-
of
right
5. Remove
an
insert
and
thrust
idler shaft
the
plug from
impact puller
washer
to
in
the
rear and from
the
end
in
the
tapped
place inside
the
of
the
hole. Hold
the
case and pull
case.
idler shaft and
the
gear
the
7. Remove
the
idler rear washer
from
the
case.
6. Remove
the
gear and
thrust
washer from
the
cas".
8. Remove
27
the
hearing inner race from
necessary, press
the
hearing from
the
the
gear.
idler gear.
If
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