2. CONDENSED SERVICE DATA
GENERAL
Engine Make
Engine Model
Number of Cylinders
Bore
Stroke
Displacement
Number of Forward Speeds
Battery
TUNE-UP
Firing Order
Valve Clearance (Hot)—
Intake and Exhaust
Injection Timing (Static)
Timing Mark Location
Engine Low Idle—Rpm
Engine High Idle—Rpm
Engine Full Load—Rpm
Power Rating
CAPACITIES
Cooling System
Crankcase (With Filter)
Differential Housing (With Filter Change)
Transmission
Front Drive Axle-
Final Drive (Each)
Differential
Fuel Tank
*Add 2 quarts (1,9 L) if equipped with front-wheel drive.
SIZES AND CLEARANCES
Crankshaft Main Journal
Diameter
Crankpin Journal
Diameter
Camshaft Journal Diameter
Cylinder Sleeve ID
Piston Skirt OD
Main Bearing Diametral
Clearance
Rod Bearing Diametral
Clearance
Crankshaft End Play
6060
433T
6070
Own
433T
- 4 -
6080
4331
- 3.875 in. -
(98.42 mm)
- 4.250 in. -
(107,95 mm)
- 200 cu. in. -
(3.3 L)
12
12 Volt, Negative Ground
63 hp
(47.0 kW)
37 qts.*
(35 liters)
12 qts.
(11.4 liters)
1.5 qts.
(1.4 liters)
5.5 qts.
(5.2 liters)
1-3-4-2
0.015 in.
(0.38 mm)
18° BTDC
Crankshaft Pulley
775-825
2480-2580
2300
70 hp
(52.2 kW)
— 17 qts. —
(16.1 liters)
— 10 qts. —
(9.5 liters)
37 qts.*
(35 liters)
12 qts.
(11.4 liters)
1.5 qts.
(1.4 liters)
5.5 qts.
5.2 liters)
— 32 gal. —
(121 liters)
2.7465-2.7480 in.
(69.76-69.80 mm)
2.3720-2.3735 in.
(60.25-60.29 mm)
- 2.130-2.131 i^. -
(54.18-54.23 in.)
3.8755-3.8770 in.
(98.44-98.48 mm)
3.8698-3.8718 in.
(98.29-98.34 mm)
0.0016-0.0048 in.
(0.04-0.12 mm)
0.001-0.004 in.
(0.02-0.10 mm)
0.003-0.013 in.
(0.8-0.33 mm)
83 hp
(61.9 kW)
39 qts.*
(37 liters)
12.7 qts.
(12.0 liters)
1.9 qts.
(1.8 liters)
5.9 qts.
(5.5 liters)
3. Paragragh 1 ALLIS-CHALMERS
CONDENSED SERVICE DATA Cont.
6060
Camshaft Bearing Diametral
Clearance
Camshaft End Play
Piston Skirt Diametral •
Clearance
TIGHTENING TORQUES
Connecting Rod Cap
Main Bearing Cap . . .
Cylinder Head
Injection Nozzle
Crankshaft Pulley
Flywheel
6070
- 0.002-0.005 in. -
(0.05-0.13 mm)
- 0.001-0.011 in. -
(0.03-0.28 mm)
0.0037-0.0072 in,
(0.09-0.18 mm)
6080
45 ft.-lhs.
(61 N • m)
135 ft.-lbs.
(183 N • m)
165 ft.-lbs.
(224 N • m)
15 ft.-lbs.
(20 N • m)
• 182 ft.-lbs.
(247 N • m)
- 135 ft.-lbs.
(183 N • m)
DUAL DIMENSIONS
This service manual provides specifications in both the U.S. Customary and Metric (SI) systems of measurement. The first J
specification is given in the measuring system perceived by us to be the preferred system when servicing a particular compo- 1
nent, while the second specification (given in parenthesis) is the converted measurement. For instance, a specification of "0.11 ^
inch (0.28 mm)" would indicate that we feel the preferred measurement, in this instance, is the US. system of measurement
and the metric equivalent of 0.011 inch is 0.28 mm.
FRONT AXLE
(TWO-WHEEL DRIVE)
Fig. 1—Exploded view of ad-
justabie front axle used on
Model 6080. Other models are
simiiar.
1. Pivot pin
2. Axle main member
3. Thrust washers
4. Cylinder anchor bushing
5. Retaining ring
6. Steering arm
7. Bushings
8. Axle extension
9. Thrust washers
10. Spindle
11. Wheel hub
12. Seal
13. Wear sleeve
14. Bearing
15. Bearing
16. Bearing
17. Bearing
18. Washer
19. Nut
20. Retainer (6080)
21. Huh cap
WHEEL BEARINGS
All Models
1. Ib disassemble, raise and support
front oftractor. Remove hub cap (21—Fig.
1), cotter pin and bearing retaining (19),
then separate wheel hub (11) and bear-
ings from spindle (10). Drive bearing cups
and seal wear sleeve (13) out ofwheel hub
if renewal is necessary. Drive seal (12)
from spindle.
Install inner and outer bearing cups in
wheel hub. Press new wear sleeve (13) in-
to hub until edge ofsleeve is V^ inch (6.35
mm) past flush (S—Fig. 2) with edge of
hub on all 6080 models and 6060 and
6070 models with 96 inch (245 cm) tread,
or flush with edge of hub on 6060 and
6070 models equipped with standard ax-
le. Be sure to use correct size driver to in-
stall wear sleeve to prevent damage to
sleeve. Install seal assembly (12—Fig. 2)
4. MODELS 6060-6070-6080 Paragraphs 2-6
onto spindle (10) so side with name and
number faces outward. Make certain seal
bottoms against spindle shoulder.
Pack bearings with wheel bearing
grease, then reinstall wheel hub. Tighten
adjusting nut (19-Fig. 1) to 85 ft.-lb& (115
N ' m) torque while rotating hub to seat
bearings. Then, loosen nut to align hole
in spindle with notch in nut or nut re-
tainer (20) and install cotter pin. Install
hub cap.
SPINDLES AND BUSHINGS
All Models
2. Tb remove front spindle (10—Fig. 1),
first raise and support front of tractor.
Remove front wheel. Remove retaining
ring (5), then pull steering arm (6) from
spindle. Note that arm is an extreme
shrink fit on spindle and removal will
probably require using a hydraulic press
or cutting arm offwith a torch. Withdraw
spindle from axle extension (8) and
remove thrust washers (9).
Inspect spindle bushings (7) for wear
and renew if necessary. Press new
bushings into axle extension bore until
they are flush to 0.030 inch (0.75 mm)
below surface of axle extension.
Install new thrust washers on spindle,
then position spindle in axle extension.
Heat steering arm to 600 °F (315 °C), then
press onto spindle until spindle end play
is less than 0.030 inch (0.75 mm) and re-
taining ring (5) can be installed. Be sure
spindle will rotate freely between stops.
Do not attempt to reposition steering arm
after it has cooled below 300 °F (150 °C).
Install front wheel and tighten mount-
ing bolts to 85 ft.-lbs. (115 N • m) torque.
Lubricate spindle bushings with
multipurpose grease.
TIE ROD AND TOE-IN
All Models
3. Tie rod ends (3 and 6—Fig. 3) are
nonadjustable and must be renewed ifex-
cessively worn. Lubricate tie rod ends
with multipurpose grease.
Front wheel toe-in should be 1/8 inch
(3 mm) measured at hub height. Tbe-in
can be adjusted without disconnecting tie
rod from steering arms (1). Remove clamp
bolt (5) from tie rod tube (4). Loosen tie
rod end jam nut (7) or clamp, then turn
inner rod (8) on 6060 and 6070 models or
tie rod tube on 6080 models to lengthen
or shorten tie rod as necessary to provide
correct toe-in.
AXLE MAIN MEMBER
All Modeis
4. The axle main member (2—Fig. 1) is
supported by pivot pin (1). The pin pivots
in renewable bushings in front support
casting.
Fig. 2—Press new wear sleeve
(13} into wheel hub (It) untii
edgeofsieeveis V* inch (6.35
mm} past flush (S} with edge
of hub on Modei 6080 and
Modeis 6060 and 6070 with 96
inch (245 cm} tread, or fiush
with edge of hub on 6060 and
6070 modeis with standard
axie.
Tb remove axle and pivot pin, raise and
support front of tractor so no weight is
carried on front axle. Disconnect hoses
from power steering cylinder and cap all
openings Remove retaining ring (4) from
rear ofpivot pin, then push pin out ofax-
le and front support and remove axle.
Inspect bushings for wear and renew as
necessary. Bushings are presized and
should not require reaming if carefully
installed.
Ib reinstall axle, reverse the removal
procedure. Install pivot pin with one
thrust washer (3) at front (inside
wishbone) and one washer between axle
and front support. Push pivot pin fully
rearward, then install as many washers
as possible on rear ofpin, but still be able
to install retaining ring (4). Lubricate
bushings with multipurpose grease.
Fig. 3—Expioded view of tie
rod assembiy used on 6060
and 6070 modeis. Modei 6080
is simiiar.
1. Steering arm
2. Seal
3. Sliding tie rod end
4. Tube
5. Clamp bolt
6. Tie rod end
7. Jam nut
8. Inner tube
a Cylinder
FRONT-WHEEL DRIVE AXLE
LUBRICATION
All Models So Equipped
5. Check oil level in front axle housing
and final drive housings after every 100
hours ofoperation. Manufacturer recom-
mends renewing lubricant at 800 hours
of operation or once a year, whichever
comes first. Fill housings to level plug
openings with Allis-Chalmers Power
Fluid 821 or equivalent. Axle housing fill
and level plug (15—Fig. 4) is located on
left rear side ofaxle housing. Final drive
fill and level plug (24—Fig. 6) must be
positioned at either 3 o'clock or 9 o'clock
when filling with oil and checking oil
level.
Lubricate axle pivot and steering
linkage with multipurpose grease.
TIE ROD AND TOE-IN
All Modeis So Equipped
6. Front wheel toe-in should be "0" on
front-wheel drive models. To adjust,
5. Paragraghs 7-8 ALLIS-CHALMERS
11
12
14
15
Fig. 4—Exploded view offront
drive axie housing and pivots.
1. Front support
2. Pivot hushing
3. Thrust washer
4. Pivot pin
5. Axle housing
6. Drain plug
7. Bearing retainer screw
8. Seals
9. Bearings
10. Bearing cap
11. Differential carrier
12. Thrust washer
13. Rear support
14. Bushing
15. Level plug
Fig. 5—Exploded view of front
drive axle drive shaft.
1. Sleeve
2. Spacer
3. Snap ring
4. Front shaft
5. Snap ring
6. Sleeve
7. Snap ring
8. Washer
9. Bearing
10. Support
11. Rear shaft
12. Snap ring
16
17
Fig. 6—Exploded view of front
drive axle final drive assembiy
used on Modei 6070 and late
Model 6080 (effective S.N.
6235). All other modeis are
simiiar except that parts
shown in inset are used.
1. King pins
2. Shims
3. Steering knuckle
4. Bushing
5. Stuh axle
6. Dust seal
7. Oil seal
8. Bearings
9. Washer
10. Washer
11. Locknut
12. Spacer
13. Shim
14. Wheel hub
15. Sun gear
16. Retaining ring
17. Gear support
18. Ring gear
19. Planetary carrier
20. Thrust washers
21. Planet gear
22. Needle rollers
23. Pin
24. Drain/fill plug
18
19 24
disconnect tie rod end from steering
knuckle arm. Loosen jam nut and turn
tie rod end in or out to provide correct set-
ting. Install tie rod and tighten retaining
nut to 70 ft.-lbs. (95 N • m) torque.
R&R AXLE ASSEMBLY
All Models So Equipped
7. Front drive axle final drive assembly
and axle shaft assembly can be serviced
without removing axle housingfrom trac-
tor. To repair bevel pinion shaft or dif-
ferential assembly, complete axle
housing must be removed from tractor.
To remove axle assembly, first raise
front of tractor and support with stands
under engine side frames. Remove front
wheela Disconnect hydraulic hoses from
steering cylinder and cap all openings.
Disengage snap ring (3—Fig. 5) from
groove behind front drive shaft sleeve (1)
and disengage snap ring (12) from groove
at rear end of rear drive shaft (11). Move
rear drive shaft and center sleeve (6) rear-
ward. Slide front sleeve (1) rearward to
clear bevel pinion shaft, then remove
front drive shaft (4). Pbsition a rolling
floor jack under center of axle housing,
remove front and rear axle pivot supports
(1 and 13—Fig. 4) and lower axle
assembly from tractor.
To reinstall axle, assemble front and
rear thrust washers (3 and 12) and pivot
supports (1 and 13) on axle. Raise axle
assembly into position and tighten pivot
support mounting cap screws to 195 ft.-
lbs. (265 N • m) torque. Install wheels and
tighten lug bolts to 190ft.-lb&(260 N • m)
torque. Force axle assembly fully rear-
ward, then remove supports and lower
tires to the ground.
Install front drive shaft and sleeve
(1—Fig. 5) with original spacer (2), then
move snap ring (3) into groove in shaft.
Move rear drive shaft forward engaging
center sleeve (6) with front drive shaft.
Move snap ring (12) into groove in rear
drive shaft, force drive shaft assembly
rearward, then measure clearance be-
tween snap ring on bevel pinion shaft and
end of front sleeve (1). Clearance should
be 0.020-0.060 inch (0.5-1.5 mm). Install
different thickness spacer (2), if
necessary, to obtain desired clearance.
Connect steering cylinder hydraulic
hoses.
FINAL DRIVE ASSEMBLY,
WHEEL HUB AND STUB AXLE
All Models So Equipped
8. R&R AND OVERHAUL. Removal
ofleft or right final drive is similar. Raise
and support front of tractor and remove
front wheel. Rotate wheel hub so plug
6
6. MODELS 6060-6070-6080
(24—Fig. 6) is at the bottom, remove plug
and drain oil from final drive. Remove
mounting cap screws and separate
planetary carrier (19) from wheel hub
(14). Remove wheel bearing locknut (11)
using a suitable spanner wrench.
Withdraw ring gear support (17) with
ring gear (18) and bearing cone as an
assembly. Thread two M8xl.25 cap
screws into tapped holes in ring gear to
push bearing cone off support if renewal
is necessary. Remove shim (13) and spacer
(12) if so equipped. Remove wheel hub
assembly (14). Remove cap screws secur-
ing stub axle (5) to steering knuckle (3)
and remove stub axle.
Press planet gear pins (23) outward
from planetary carrier (19). Remove
planet gears (21) with roller bearings (22)
and thrust washers (20).
Planet gear thrust washer thickness
when new is 0.030-0.033 inch (0.77-0.083
mm). Inspect all hearings for wear,
damage or rough operation and renew as
necessary Remove seals from stub axle
and wheel hub. Inspect bushing (4) in
stub axle for wear. Inside diameter of
hushing should be 1.656-1.658 inches
(42.05-42.13 mm) on Models 6060 and
6070, or 1.774-1.776 inches (45.05-45.13
mm) on Model 6080. Running clearance
of axle shaft in bushing is 0.002-0.006
inch (0.05-0.15 mm) on all models. When
renewing bushing, press bushing into
stub axle until seated against counter-
bore. Ream bushing inside diameter to
provide desired running clearance.
Install new oil seal into stub axle with
spring side of seal facing inward. Install
dust seal with cupped side outward.
Lubricate seal lip, then install stub axle
over axle shaft and tighten mounting cap
screws to 83 ft.-lbs. (113 N • m) torque.
Install new bearing cups, ifremoved, in-
to wheel hub (14). Install new oil seal (7)
into wheel hub with spring side of seal
facing inward. Be sure seal seats against
counterbore. Install dust seal (6)with cup-
ped side facing outward. Install wheel
hub, bearings and spacer (12) and shim
(13), ifso equipped, and ring gear support
(17) with ring gear (19). Install washers
and locknut (11). Adjust wheel bearing
preload as follows.
On Model 6060 and early Model 6080
(prior to S.N. 6235), tighten locknut (11)
to 375 ft.-lbs. (510 N • m) torque while
turning wheel hub to make sure bearings
remain free. Wrap a string around outer
flange of wheel hub and attach a spring
scale. Measure wheel hub rolling torque
using the spring scale. Specified rolling
torque is 10-40 in.-lbs. (1.1-4.5 N • m)
which corresponds to spring scale
reading of 2-7 pounds (9-31 N) for 6060
or 1.5-5.5 pounds (6.7-24.4 N) for 6080
modela Tb increase rolling torque, install
a thinner shim (13). Tb decrease rolling
torque, install a thicker shim.
On Model 6070 and late Model 6080 (ef
fective S.N. 6235), wrap string around
outer flange of wheel hub and attach a
spring scale. Use the spring scale to
measure hub rolling torque while
tightening locknut (11). Tighten nut un-
til spring scale reading is within range
of 2-7 pounds (9-31 N) for Model 6070 or
1.5-5.5 pounds (6.7-24.4 N) for Model
6080.
Assemble planetary gears (21) with
bearing rollers (22) and thrust washers
(20) into planetary carrier. Install
planetary pins (23) into carrier and gears.
Apply bead of R.T.V. silicone sealer
around mounting surface of planetary
carrier, then install sun gear (15) and
planetary unit on wheel hub. Tighten
mounting cap screws to 47 ft.-lbs. (64
N • m) torque.
Refill final drive unit to proper level
with AUis-Chalmers Power Fluid 821 or
equivalent. Install wheel and tire and
tighten lug bolts 192 ft.-lba (260 N • m)
torque.
AXLE SHAFT, STEERiNG KNUCKLE
AND KiNG PiNS
Ail Models So Equipped
9. R&R AND OVERHAUL. Raise and
support front oftractor and remove front
wheel. Drain oil from final drive housing
and axle housing. Remove final drive
assembly as outlined in paragraph 8.
Remove axle bearing retaining screw
(7—Fig. 4) fron^ axle housing, then pull
axle shaft (Fig. 7) with universaljoint and
bearing from axle housing.
Paragraph 9
Remove snap ring (6) and bearing sup-
port assembly (8) from axle shaft. Remove
snap rings (7), bearing (10) and seals (11
and 12) from bearing support. Seals (13
and 14) are located in stub axle.
Disconnect tie rod and steering
cylinder (right-hand side) from steering
knuckle (3—Fig. 6). Remove king pins (1)
and separate steering knuckle from ax-
le housing. Examine seals (8—Fig. 4) and
bearings (9) for wear or damage and
remove from axle housing if renewal is
necessary.
Ib reinstall, reverse the removal pro-
cedure while noting the following special
instructions: Install oil seal (11—Fig. 7)
with spring side of seal facing bearing
(10). Install dust seal (12) with cupped
side outward. Install oil seal (14) into stub
axle with spring side of seal facing in-
ward. Install dust seal (13) with cupped
side facing outward. Be sure dust seals
contact the oil seals. Lubricate oil seals
before installing over axle shaft.
NOTE: If axle shafts from both sides have
been removed, note that right-hand axle
shaft is slightly longer than left-hand shaft.
Be sure they are installed in their correct
locations.
Install axle shaft assembly into axle
housing and secure with retaining screw.
Make certain retaining screw engages
groove in bearing support (8).
Install new king pin bearings (9—Fig.
4) and seals (8), if necessary, making cer-
tain they are seated in bottom of axle
housing bores. Be sure lip of seal is fac-
ing inward. Position steering knuckle on
end ofaxle housing and install king pina
Fig. 7—Exploded view of
front-wheel drive axle shaft
assembly. Dust seai (13} and
oil seai (14) are located in stub
axle. Note thatLH. inner axle
shaft is shorter than R.H. inner
axie shaft
1. Axle shaft, inner
2. Lock ring
3. Universal joint
4. Yoke
5. Axle shaft, outer
6. Snap ring
7. Snap ring
8. Bearing support
9. "O" ring
10. Bearing
11. Oil seal
12. Dust seal
13. Dust seal
14. Oil seal
7. ParagraghiO ALLISCHALMERS
Install king pin mounting cap screws
finger tight, complete installation of final
drive assembly, then adjust king pin
bearing preload as follows:
Remove grease fitting or plug and
mounting cap screws from upper king
pin. Install special plate ACTP-3080
(1—Fig. 8) on upper king pin, install king
pin cap screws (2) and tighten to 47 ft.-
lbs. (64 N • m) torque. Use a torque
wrench (3) to measure torque required to
turn planetary unit. Specified torque is
58-72 ft.-lbs. (79-97 N • m) torque. To in-
crease torque reading, decrease thickness
ofshims (2—Fig. 6) on lower king pin. Tb
decrease torque reading increase shim
thickness. Shims should only be install-
ed on lower king pin. Remove special
plate from upper king pin, reinstall
mounting cap screws and tighten to 47-fl.-
lbs. (64 N * m) torque.
Refill final drive housing and axle hous-
ing to correct levels with Allis-Chalmers
Power Fluid 821 or equivalent.
Fig, 8—'install speciat plate ACTP-3080 (1} on up-
per king pin, f/ien use a torque wrench (3) to
measure torque required to turn planetary unit, tn-
staii shims on iower king pin oniy to adjust king pin
bearing preioad.
^7 1 L.
DIFFERENTIAL AND
BEVEL GEAR HOUSING
All Models So Equipped
10. R&R OVERHAUL. Axle assembly
must be removed from tractor as outlin-
ed in paragraph 7 to remove differential
assembly. Planetary assemblies can be
removed as complete units if disassembly
is not necessary. Remove drain plugs and
drain oil from final drive housings and
axle housing. Support planetary
assembly with an overhead hoist, remove
king pins and separate complete
planetary unit from axle housing. Loosen
axle bearing retainer screws (7—Fig. 4),
then pull axle shaft assemblies from axle
housing. Remove cap screws retaining dif-
ferential carrier housing (11), then
remove carrier with differential
assembly from axle housing.
Block teeth ofpinion gear and ring gear
to prevent pinion shaft movement, then
loosen pinion shaft locknut (1—Fig. 9),
mark differential carrier bearing caps to
carrier housing so they can be reinstalled
in their original positions. Remove bear-
ing caps and adjusting rings (15). Lift dif-
ferential and ring gear assembly from
carrier housing.
Remove pinion shaft locknut, then
press pinion shaft (10) assembly out of
carrier housing. Drive seals and bearing
cups from housing as necessary.
Remove ring gear mounting cap screws
and separate ring gear (11) from differen-
tial case (12). Remove screw (13) retain-
ing pinion gear shaft (18). Push shaft out
ofcase and remove pinion gears (17), side
gears (19) and thrust washers (16 and 20).
Inspect gears, bearings and thrust
washers for wear or damage and renew
3 ? 1
Fig. 9—Exploded view of
front-wheel drive differential
and bevei gear assemblies.
l.Nut
2. Dust seal
3. Oil seal
4. Spacer
5. Bearing
6. Shim
7. Spacer
8. Bearing
9. Shim
10. Bevel pinion
11. Bevel ring gear
12. Differential case
13. Retaining screw
14. Carrier bearings
15. Adjuster rings
16. Thrust washer
17. Pinion gear
18. Shaft
19. Side gear
20. Thrust washer
if necessary. Running clearance of shaft
in pinion gears should be 0.003-0.005
inch (0.08-0.12 mm). Thickness ofpinion
gear thrust washers is G.058-0.060 inch
(1.47-1.53 mm) when new. Side gear
thrust washers are available in two
thicknesses of 0.059 inch (1.5 mm) or
0.063 inch (1.6 mm) and are used to ad-
just side gear end clearance. Note that
side gears and pinion gears and the bevel
ring gear and pinion gear are available
as complete gear sets only.
Ib check and adjust differential side
gear (19) clearance, assemble side gears
without thrust washers and pinion gears
with thrust washers into differential
case. Install pinion gear shaft and retain-
ing screw. Use a depth micrometer (Fig.
10) to measure distance from edge ofcase
to the end of one of the side gears with
gear pushed inward against pinion gears
and with gear pulled outward against
case. Subtract measurement with gear
held outward from measurement with
gear held inward to determine side gear
clearance, then subtract O.OIO inch (0.25
mm) from the clearancefigure.The result
is thickness ofthrust washer (20—Fig. 9)
that should be installed to provide
desired end clearance of0.010 inch (0.25
mm). Repeat the procedure for side gear
on opposite side as different thickness
washer may be required to provide
desired end clearance for each gear.
Disassemble differential gears, then
reassemble using correct thickness
thrust washera Peen head ofpinion shafl
retaining screw (13) to prevent loosening.
Install ring gear (11) onto case (12) and
tighten mounting cap screws evenly to
95-ft.-lbs. (129 N • m) torque.
Reinstall and adjust bevel pinion shaft
(10) and differential assembly as outlined
in paragraphs 11 through 14.
Install differential support housing in-
to axle housing and tighten mounting
cap screws to 83 ft.-lba (113 N * m) torque.
Reinstall axle shafts and final drive
unita Reinstall axle assembly under trac-
tor. Refill axle housing and final drive
housings to correct levels with Allis-
Chalmers Power Fluid 821 or equivalent.
Fig. 10—Use a depth micrometer to measure
distance from edge of case to end of side gear to
determine thickness of thrust washer required to
provide proper end clearance. Refer to text.
8
8. MODELS 6060-6070-6080 Paragraphs 11-12
11. PINION GEAR DEPTH. If bevel
pinion shaft (10—Fig. 9), bearings or car-
rier housing is renewed, pinion gear
depth must be set. Pinion positioning
gage set ACTP-3115 is required to proper-
ly set pinion depth.
Install front and rear pinion bearing
cups in carrier housing. From gage set,
assemble drawbolt (1—Fig. 11), front
aligner (6), dummy pinion (4), rear
aligner (2) and drawbolt (1) with front and
rear bearing cones into suppport housing
(5). Wrap cord around dummy pinion and
use a spring scale to measure force re-
quired to turn dummy pinion.
NOTE: Dummy pinion cannot be turned a
complete revolution during rolling torque
check. Make several readings to ensure ac-
curate reading is obtained.
Specified rolling torque is 10-30 in.-lbs.
(1.1-3.4 N ' m) which is equivalent to
spring scale reading of 7.5-21.5 pounds
(34-96 N). Adjust nut on drawbolt (1) to
set tollirlg torque within specified range.
Install differential carrier bearing
cups, adjusting rings and bearing caps
(10) onto housing. Tighten bearing cap
mounting cap screws (11) to 83 fl.-lb& (113
N • m) torque. Assemble cones (12), cross
tube (13) and nut (8) into housing as
shown making certain cones are seated
in bearing cups. Measure clearance be-
tween end of dummy pinion and cross
tube using a feeler gage (7).
Note correction number (expressed in
millimeters) etched on gear end ofpinion
shaft. Tb convert correction number to in-
ches, divide by 25.4. The correction
number will be preceded by a + (plus) or
- (minus) mark. Add or subtract
(whichever way number is marked) the
correction number from nominal dimen-
sion, which is 4.528 inches (115 mm). The
result is corrected pinion depth
dimension.
Add the following values: length of
dummy pinion (stamped on tool), ^
diameter ofcross tube (measure diameter
and divide by 2), and clearance between
dummy pinion and cross tube (measured
with feeler gage). Subtract corrected
pinion depth dimension from total of the
three values. The result is thickness of
shim (9—Fig. 9) required to properly set
pinion depth.
Example:
Nominal
dimension . . . .4,528 in. (115.00 mm)
Add or subtract
correction
number , . . . +0.002 in (0.05 mm)
Result is
corrected
pinion depth , .4,530 in. (115.05 mm)
Dummy pinion
length 3.654 (92.80 mm)
Plus V2 diameter
of cross tube +0.960 in. (24.38)
Plus feeler gage
thickness ., , +0.034 in. (0.86 mm)
Total 4,648 in. (118,06 mm)
Minus corrected
pinion depth —4,530 in. (115.06 mm)
Thickness of
shim required ,0.118 in. (3.0 mm)
Fig. 11—View showing use of
pinion positioning gage set
ACTP-3i 15 when setting pin-
ion gear depth. Refer to text.
1. Drawbolt
2. Bearing aligner
3. Bearing cone
4. Dummy pinion
5. Differential support housing
6. Bearing aligner
7. Feeler gage
8. Ring nut
9. Pin
10. Bearing cap
11. Cap screw
12. Cones
13. Cross tube
Remove pinion setting toola Install cor-
rect thickness shim (9—Fig. 9)onto pinion
shaft with chamfered ID side facing gear
end ofshaft. Press front bearing cone on-
to shaft until seated against shim. Install
pinion shaft assembly and adjust bear-
ing preload as outlined in paragraph 12.
12. PINION SHAFT BEARING AD-
JUSTMENT. Pinion bearing preload
must be checked and adjusted whenever
pinion shaft (10—Fig. 9), bearings (5 and
8) or carrier housing is renewed. Bearing
preload is adjusted by installing a dif-
ferent thickness shim (6).
Assemble pinion shaft assembly using
original thickness shim (6). Be sure bear-
ing cone (5) is seated against shim. Do not
install seals (2 and 3) at this time.
Tighten locknut (1) to 217 fl.-lba (294
N • m) torque. Wrap a string (3—Fig. 12)
around pinion shaft locknut (1), then use
a spring scale to measure force required
to rotate shaft. Specified rolling torque
is 10-30 in.-lbs, (1.1-3,4 N • m) which is
equivalent to spring scale reading of9-27
pounds (40.5-121 N).
Tb adjust bearing preload, install a
thinner shim (6—Fig, 9) to increase roll-
ing torque or install thicker shim to
decrease rolling torque.
After adjustment is complete, remove
locknut and install new oil seal (3) and
dust seal (2). Be sure spring side ofoil seal
faces inward and cupped side ofdust seal
faces outward. Reinstall locknut and
tighten to 217 ft.-lbs. (294 N • m) torque.
Record final spring scale rolling torque
reading for use in setting differential car-
rier bearings (paragraph 13),
13 Fig. 12—Wrap a string around pinion shaft iocknut
and use a spring sca/e to measure pinion roiiing
torque.
1. Locknut
2. Support housing 4. Pinion
3. String 5. Spring scale
9
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10. Paragraghs 13-15 ALLIS-CHALMERS
13. DIFFERENTIAL CARRIER
BEARING PRELOAD ADJUSTMENT
Before reinstalling differential assembly,
wrap a string around pinion shaft
locknut (1—Fig. 12) and attach a spring
scale. Use the scale to measure force re-
quired to rotate pinion shaft and record
reading for later use.
Install differential and ring gear
assembly with carrier bearings and ad-
juster rings in carrier housing. Install
carrier bearing caps in their original
positions and tighten mounting cap
screws to 43 ft.-lbs. (58 N • m) torque.
Loosen cap screws, then retorque to 14 ft.-
lbs. (19 N • m). Tighten adjuster rings
against bearing cups until pinion shaft
rolling torque (spring scale reading) is
4.5-9 pounds (20-40 N) more than reading
taken of pinion shaft only.
Adjust ring gear backlash as outlined
in paragraph 14.
14. RING GEAR BACKLASH AD-
JUSTMENT. Mount a dial indicator
(1—Fig. 13) on carrier housing so probe
contacts edge of ring gear tooth at 90°
angle. While holding pinion shaft,
measure ring gear movement at three dif-
ferent locations around gear. Backlash at
all three locations should be within range
of 0.007-0.009 inch (0.18-0.23 mm).
Tb adjust backlash, first mark position
of both bearing adjusting rings in rela-
tion to carrier housing. To decrease
backlash, loosen adjusting ring (7) on side
opposite ring gear and tighten adjusting
ring (3) on ring gear side. To increase
backlash, loosen adjusting ring (3) on
Fig. 14—Expioded view of
front-wheei drive transfer
gearbox,
1. Drive gear
2. Idler gear
3. Thrust washers
4. Bearing rollers
5. Spacer
6. Pin
7. Idler shaft
8. Dust seal
9. Oil seal
10. Snap ring
11. Bearing
12. Spacer plate
13. Snap ring
14. Output shaft
15. Driven gear
16. Bearing
17. Plug
18. Handle
19. Bearing flange
20. Bearing
21. Control rod
22. Outer control lever
23. Case
24. Drain plug
25. Plug
26. Sealing washer
27. Shifter lug
28. Inner shifter lever
29. Detent plunger
30. Spring
ring gear side and tighten adjusting ring
(7) on side opposite ring gear.
NOTE: One adjusting ring must be tight-
ened the same amount as adjusting ring on
opposite side is ioosened to maintain dif-
ferential bearing preioad setting.
After ring gear backlash is set, recheck
pinion shaft rolling torque to make sure
bearing preload setting is still correct.
Then, install adjusting ring retainer
plates to prevent adjusting rings from
loosening. Tighten bearing cap retaining
screws (5) to final torque of83 ft.-lbs. (113
N-m).
Fig. 13~'Position a diai in-
dicator against tooth of ring
gear to measure ring gear
backlash.
1. Dial indicator
2. Support housing
3. Bearing adjuster ring L.H.
4. Ring gear
5. Cap screw
6. Bearing cap
7. Bearing adjuster ring R.H.
TRANSFER GEARBOX
All Models So Equipped
15. R&R AND OVERHAUL. To
remove gearbox, first remove drain plug
(24—Fig. 14) and drain oil from rear hous-
ing and gearbox. Remove front drive shaft
as outlined in paragraph 7, then move
rear drive shaft forward until it clears
gearbox output shaft. Disconnect control
rod(21)from shift lever(22). Remove gear-
box mounting cap screws and lower gear-
box from rear housing.
To disassemble, drive roll pin (6) from
housing (23). Pull idler shaft (7) forward
from housing and remove idler gear (2)
with bearing rollers (4), spacer (5) and
thrust washers (3), Remove dust seal (8),
oil seal (9) and snap ring (10), then
withdraw output shaft (14) with spacer
(12) and front bearing (11) from housing.
Remove driven gear (15), shifter lug (27)
and rear bearing (16). Drive roll pin from
outer shift lever (22) and remove outer
lever and inner shift lever (28). Remove
plug (25), spring (30) and detent plunger
(29). Remove and discard "O" ring (31)
and backup ring (32). Drive out plug (17)
if necessary.
Inspect all parts for wear, scoring or
other damage and renew as necessary.
Tb reassemble, reverse the disassembly
procedure while noting the following
special instructions: Lubricate "O" ririg
(31) before installing inner shift lever
(28). Be sure outer shift lever (22) points
forward when inner lever is downward.
Stepped face ofspacer plate (12) must face
forward. Lubricate oil seal (9), theft in-
stall with spring side facing inward. In-
stall dust seal (8) with cupped side
outward.
Reinstall gearbox assembly and
tighten mounting cap screws to 72 ft.-lba
10
