Toro 31-10K802, 31-10K803, 31-12K802, 31-12K804, 31-16O803 Service Manual

WHEEL HORSE 6 & 8-SPEED MECHANICAL TRANSMISSION

Table of Contents – Page 1 of 3

FOREWORD

TRANSMISSION USAGE

SECTION I 5003 AND 5010 TRANSMISSIONS DESCRIPTION RATIOS REMOVAL AND REPLACEMENT REMOVAL: INSTALLATION: 5003-5010 3-SPEED TRANSMISSION DISASSEMBLY: CLEANING, INSPECTION, BEARING AND OIL SEAL REPLACEMENT ASSEMBLY: 5003 AND 5010 DIFFERENTIAL OVERHAUL DISASSEMBLY: CLEANING, INSPECTION, PARTS REPLACEMENT ASSEMBLY: 5003 AND 5010 SERVICE NOTES

1. TRANSMISSION COVERS

2. #3559 BRAKE SHAFTS

3. SPLINE SHAFT AND MATCHING GEARS

4. #3559 BRAKE SHAFT 5003 - 5010 TRANSMISSION

SECTION II 5053-5058 3-SPEED UNIDRIVE DESCRIPTION RATIOS REMOVAL AND REPLACEMENT REMOVAL: INSTALLATION: DISASSEMBLY: CLEANING, INSPECTION, BEARING AND OIL SEAL REPLACEMENT ASSEMBLY: ASSEMBLY OF 5058 SERIES WITH BEVEL GEAR DIFFERENTIAL DIFFERENTIAL OVERHAUL STANDARD DIFFERENTIAL DISASSEMBLY: STANDARD DIFFERENTIAL ASSEMBLY: BEVEL GEAR DIFFERENTIAL DISASSEMBLY: ASSEMBLY: 5053 TYPICAL SPUR GEAR DIFFERENTIAL TYPE 5053 TRANSMISSION PARTS LIST 5058 BEVEL GEAR DIFFERENTIAL TYPE 5058 TRANSMISSION PARTS LIST

WHEEL HORSE 6 & 8-SPEED MECHANICAL TRANSMISSION

Table of Contents – Page 2 of 3

SECTION III 5060 6-SPEED TRANSMISSION DESCRIPTION REMOVAL AND REPLACEMENT REMOVAL: INSTALLATION: 5060 6-SPEED TRANSMISSION DISASSEMBLY: NEEDLE BEARING REPLACEMENT: CLUSTER GEAR: CLEANING, INSPECTION, BEARING AND OIL SEAL REPLACEMENT ASSEMBLY: LIMITED SLIP DIFFERENTIA L DISASSEMBLY:

ASSEMBLY:

5060 TRANSMISSION 5060 TRANSMISSION PARTS LIST

SECTION IV 4-SPEED UNIDRIVE DESCRIPTION RATIOS REMOVAL AND REPLACEMENT REMOVAL: INSTALLATION: 4-SPEED UNIDRIVE TRANSMISSION DISASSEMBLY: CLEANING, INSPECTION, BEARING AND OIL SEAL REPLACEMENT ASSEMBLY: DIFFERENTIAL OVERHAUL 4 PINION DIFFERENTIAL DISASSEMBLY: DIFFERENTIAL ASSEMBLY: 4-SPEED TRANSMISSION

SECTION V 8-SPEED TRANSMISSION DESCRIPTION RATIOS REMOVAL AND REPLACEMENT REMOVAL: INSTALLATION: DISASSEMBLY: NEEDLE BEARING REPLACEMENT: CLUSTER GEAR: CLEANING, INSPECTION, BEARING AND OIL SEAL REPLACEMENT ASSEMBLY: 8 PINION DIFFERENTIAL DISASSEMBLY:

WHEEL HORSE 6 & 8-SPEED MECHANICAL TRANSMISSION

Table of Contents – Page 3 of 3

SECTION V 8-SPEED TRANSMISSION -Continued REMOVAL AND REPLACEMENT -Continued ASSEMBLY: 8-SPEED, 10 PINION LIMITED SLIP DIFF ER ENTIAL 8-SPEED, 4 PINION DIFFERENTIAL 1" AXLES 8-SPEED, 8 PINION DIFFERENTIAL 1-1/8" AXLES 8-SPEED TRANSMISSION

MECHANICAL

TRANSMISSION

REPAIR MANUAL

WHEEL

lawn

I

&

garden tractors

Price

$3.50

FOREWORD

This

service and repair manual has been compiled to provide authorized Wheel Horse service personnel with the proper procedures and techniques for servicing

The following index lists all areas covered.

all

of

the introductory sections first to gain a proper understanding of

Wheel

Horse mechanical transmissions.

It

is

advisable to read

the Wheel Horse mechanical transmission used in each model.

is

The transmission

a sophisticated piece of machinery. Maintain strict cleanliness control during all stages of service and repair. Even a small amount of dirt or other contamination can severely damage the components.

of

Product information and specifications are shown herein as time

of

change product specifications, designs and standard equipment without notice and without incurring obligation.

printing. Wheel Horse Products, Inc. reserves the right to

the

Page

TRANSMISSION USAGE CHART

SECTION

I

5003 5010 TRANSMISSIONS

Removal Installation Disassembly Cleaning. Inspection. Bearing and

Oil Seal Replacement

Assembly

DIFFERENTIAL OVERHAUL

Disassembly Cleaning. Inspection. Parts Replacement 10 Assembly

5003

AND EXPLODED VIEW

PARTS

SECTION

..........................

........................

.......................

..............

.........................

..............

.......................

.........................

5010

SERVICE NOTES

......................

LIST

..........................

II

.......

.........

5053 5058 3-SPEED UNlDRlVE

Description Removal Replacement Disassembly Cleaning, Inspection, Bearing and

Oil Seal Replacement Assembly Assembly

Bevel Gear Differential

DIFFERENTIAL OVERHAUL

Dissassembly (Standard Differential)

Assembly (Standard Differential)

Disassembly (Bevel Gear Differential) 22 Assembly (Bevel Gear Differential)

EXPLODED VIEW

PARTS LIST EXPLODED VIEW (5058 TRANSMISSION PARTS

LIST

........................

..........................

.......................

..............

.........................

of

5058

Series with

............

..............

......

(5053

TRANSMISSION)

(5053

TRANSMISSION)

(5058 TRANSMISSION)

.......

.....

....

...

4

5-1 4

6-8

8-9

10-1

10

11

12

13

14

15-26

15

16-1 16-1 8

18

19-20

21

2 1-22

21 22

22

23

24

25

26

SECTION

III

5060 6-SPEED TRANSMISSION

Description Removal Installation Disassembly

5

8

1

Cluster Gear Cleaning. Inspection. Bearing and

Oil

Assembly

LIMITED

Disassembly Assembly

EXPLODED VIEW PARTS

LIST

SECTION

........................

..........................

........................

Seal

Replacement

.........................

SLIP

DIFFERENTIAL

.........................

..........................

IV

4-SPEED UNlDRlVE TRANSMISSION

Description Removal Installation Disassembly

Cleaning. Inspection. Bearing and

Oil Seal Replacement

Assembly

DIFFERENTIAL OVERHAUL

Disassembly Assembly

7

EXPLODED VIEW

PARTS

LIST

........................

..........................

........................

.........................

..........................

SECTION V 8-SPEED TRANSMISSION

Description

Removal

Installation

Disassembly Needle Bearing Replacement

Cluster Gear

Cleaning. Inspection. Bearing and

Oil Seal Replacement

Assembly

8-PINION DIFFERENTIAL

Disassembly

Assembly

EXPLODED VIEWS PARTS

LIST

........................

..........................

........................

.........................

..........................

........

.......................

..............

.............

.......................

......................

.......................

..............

.......................

......................

..............

.......................

.........

.......................

..............

................

.......................

....................

...

27-36

27 27 27

28-29

29

30-32 32-34

32-33 33-34

35 36

37-44

37 37 37

37-40

40

40-41 42-43

42

42-43

43 44

45-53

45 45 45

45-47

47

47-50

50

5

1-52

53

TRANSMISSION

USAGE

YEAR TRACTOR MODEL TRANSMISSION USED

1958 1959

1960 Suburban "400" 1961 40

1962 502, 552, 702, 32E, 32R 5025 1963 33E, 33R, 603, 633, 653, 753 5025

1964 34E, 34R, 604, 654, 704 5046

1965 L-105, L-155 5048*

1966

1967 L-107,

1968 Lawn Ranger 1-2631 Electric 5053

1969 Workhorse "700" 1-3745 1-3741 5053

1970 Raider

1971 Workhorse "800"

1972 Raider 8 1-0330 5086

1973

1974

1975 B-80 4 Speed 1-0141 5084

Up-date

5048

RJ-58 RJ-59

&

"500" 501

1

551, 701

953

854 1045 1054

605, 655, 855, 1055 1054A

L-106, L--156, 606, 656, 1046, 1056, 856

L-157,

867, 1067, 1267 5060

1057, 1257

Lawn Ranger 1-1631 Recoil 5053 "500" Special 1 -363

Commando 6 Commando 8 1-483 Raider 9, 10 1-6931

Raider 12 1-6231 - 1-6241 5060

Raider

Raider 12 1-6241 5071

Raider 12 1-625 1

Raider 12 1-6253

10

607, 657, 857

1

-463

1 -604

1

-605 1

1 1

1

-

1-6041 5060

1

1-0100

Raider

Raider 12 1-031

Raider

Raider 12 1-031

Raider 14 1-0320 5073 Commando "800"

10

12 14

8-80 4 Speed 1-0140 5080, 5084

C-1

C-120 8 Speed 1-0353 5091 C-160 8 Speed 1-0380 509

C-100 8 Speed

C-160 8 Speed

to

5053

10

1-0300 5073

0

10

1-0301 5086

1

1-01

10 5085

HP

Eight Speed 1-0370 5086

8

HP

Eight Speed 1-0360 5086

HP

Eight Speed 1-0350 5073

HP

Eight Speed 1-0340 5073

8

HP

Four Speed 1-0120 5085

00

8 Speed 1-0390 5091

1

1 -039

1

-038

1

with

7168

kit.

5003

5010

5007

5045

5025 5025

5047

5049

505

5053 5053

5053 5058

5053 5053

5053

5071

5073 5073 5073

5080 5073

5073

5091 5091

MANUAL SECTION

I

0

I

II

II II

II

II II

II

1

II II

Ill

II

II II II

II

Ill

II

Ill

V

IV

V

V V

V

IV

V V

V

IV

V V

1

V

IV

V V

-4-

TRANSMISSION USAGE

YEAR TRACTOR

1976 B-60 8-Speed 6

1

977 B-60 8-Speed 7

MODEL

B-80

8-Speed 6

B-80

8-Speed

B-

1

00

8-Speed

B-

1

00

8-Speed

C-

1

20

8-Speed

C-120 8-Speed C-160 8-Speed

C-

160 8-Speed 61

B-80

8-Speed 71 -08K801 B-100 8-Speed 71-10K801 103907 C-120 8-Speed 71

C-

1

60 8-Speed 71-16K801

VIN

NUMBER TRANSMISSION MANUAL

1

-07K80

1

-08K80

1

61 -08K802 6 1 -08K804 61 -08K803

61-10K801, 61

-1

61

-1

61-1OK803

-1

61 61-12K802 61

-1

61

-1

61-16K801, 61 - 16K802

61

-1

1

-07K80

-1

OK802 OK804

2K801,

2K804 2K803

6K804 6K803 103907

2K801 103907

&

1

&

71-16K802

USED SECTION

5091 5091

1

03907 5091

1

03907 5091

1

03907 5091

1

03907

1

03907

1

03907

V

V V

V

V V V V V

8

1

1978 C-81 8-Speed

C-101 8-Speed

C-

1 2 1

8-Speed

C-

1 4 1

8-Speed

C-

1 6 1

8-Speed

C-161 Twin 8-Speed

1

979 C-81 8-Speed 91-08K801

C-101 8-Speed

C-1

1

8-Speed 91

C-

1

2 1 8-Speed

C-

141 8-Speed

C-161 8-Speed C-161 Twin 8-Speed 91-168801

-08K80

81

-1

OK801

-1

2K801

81 81-14K801 81-16K801

-1

68801

81

9 1 -08K802 91

-1

OK801

91-1OK802

-1

18801

-1

2K801

91

-1

2K802

91 91-14K801 91

-

1

4K802

91 -1 6K801

-

168802

91

1

&

& &

&

10391 6 10391 6 10391 6 10391 6 10391 6 10391 6

10391 6

10391 6 10391 6

10391 6

10391 6 10391 6

V V

V

v

V

TRANSMISSION

USAGE

YEAR

1980 C-85 8-Speed

C-105 8-Speed

1

100 Special

C-

C-165 8-Speed C-175 Twin 8-Speed

E-

1981 C-85 8-Speed

C-

C-145 8-Speed C-165 8-Speed C-175 Twin 8-Speed E-141 8-Speed GT-2500 8-Speed

1982 C-85 8-Speed

C-

C-125 8-Speed

C-175 Twin 8-Speed E-141 8-Speed GT-1142 8-Speed GTSB-421 8-Speed SK-486 8-Speed

TRACTOR

1

25 8-Speed

1

45 8-Speed

1

41 8-Speed

105 8-Speed

1

25 8-Speed

1

05

8-Speed

1

642 8-Speed

MODEL

VIN

NUMBER

01-08K801

01

-08K802

01

-1

OK801

-1

18803

01

-1

2K801

01

-1

4K801

01

-1

6K801

01

-

1

7K802

01

-1

4E801

0

1

-08K802

-1

OK802

01 01

-1

2K802 01-14K802 01-16K802

01

-

1

7K802 01

-1

4E801

01

-1

18804

01 -08K803 01-10K803 01

-1

2K803

-1

7K803

01 01

-1

4E801 Al-114201 A1

-1

64201

01

-1

1

BHO1

01

-1

6KH01

&

TRANSMISSION MANUAL

USED SECTION

10391

5086

10391 10391 10391 10391 10391 8

10391 10391 10391 10391 10391 10391 10391 8

5086

10391 10391 10391 10391 10391

6

6 6 6 6

6 6 6 6 6 6

6

6 6

V

V V V

V

V V

V

V V V

V

5086

n

-

4B

-

Section

I

5003

-

5010

DESCRIPTION

The 5003 and

tified

by

their removable steel side covers which are bolted to a one piece cast iron case. The transmissions are of the sliding gear type. and provide three speeds forward and one speed in reverse.

All

shafts operate on needle or ball bearings sup-

ported

by

5010

transmissions are readily iden-

the steel side covers.

1st gear

2nd gear

3rd

gear

Reverse

...............

..............

...............

REMOVAL .AND REPLACEMENT

TRANSMISSIONS

The differential original equipment transmissions, the ring gear integral part of the differential case. The service replacement, however, consists of a case and gear assembly in which the gear case.

RATIOS

66.8

to

1

42.4

to

1

24.6

to

1

51.5

to

1

is

of

the spur pinion type. On all

is

bolted to the differential

is

an

Removal:

Remove any mid-mounted or trailing attachment which might interfere with transmission removal. Provide-some support under the tractor frame ahead of the transmission.

Remove the seat, fender and tool box assembly

so

equipped, belt guard, belt, and clutch rod. Discon-

nect the

lift

cable and remove the hitch.

if

Remove three bolts at each transmission side cover and frame side rail. Move transmission assembly away from the tractor. Remove the wheels and hubs, clutch and idler arm assembly, and transmission input pulley.

Drain lubricant and clean case as necessary fore disassembling.

Installation:

Install clutch and

and input pulley. Install wheels and hubs and move rod. Lay lift cable in place along top assembly into place on the tractor. Install three bolts

through holes in each transmission side cover and Install fender and tool box assembly corresponding holes in frame

securely. neath tractor frame.

idler

arm assembly, brake rod, Install drive belt and belt guard. Connect clutch

install hitch and connect lift cable.

side

rails. Tighten nuts equipped, and install seat. Remove support from

of

transmission,

be-

if

so

be-

-5-

5003 - 5010

Disassembly:

3-SPEED

TRANSMISSION

The transmission should

suitable fixture as shown in Figure cover up and the gear toward the mechanic working on the unit.

The following steps are for complete disassembly

with the transmission in the vise, as shown in Fig-

1.

ure

shift

FIGURE

be

mounted in a vise or

1,

with the left

lever and top of the case

1

FIGURE

4.

Clean and remove all burrs from both axle shafts and brake shaft and remove both axle seals.

5.

Remove the nine left cover retaining bolts and

lift

off

the cover. NOTE: Figures 2 and 3 show

the

two types of covers used on these transmissions, one with a ball bearing and one with a needle bearing at the brake shaft location. Replacement information for each type Service Notes

1

and

2,

3

Page

is

12.

given in

1.

Lift the rubber shift lever boot and loosen the shift lever set screw and lock nut, and remove the shift lever.

2.

Remove the two bolts that hold the brake band to the band.

3.

a set screw) from the brake shaft and remove the drum using a suitable puller as required.

side

cover bracket and remove the brake

Remove the snap ring (some models may have

Remove the Woodruff key from the brake shaft.

FIGURE

2

FIGURE

6.

Remove the spline shaft and pinion gear. See Figure

4.

NOTE: The shaft and matching gears in some transmissions have models have information, refer to Service Note

7.

Remove the bolts from the right cover and break the case loose from the cover gasket. allow the case to ter gear assembly to be worked

11

splines. For details and ordering

shift

4

10

splines while later

3,

sufficiently to

Page

let

loose

12.

This

will

the clus-

and re-

moved, as shown in Figure

may be disassembled as shown in Figure assemble and assemble carefully to avoid damage to the Woodruff keys and bushings. The cluster gear bushings may be removed and installed using suitable arbors.

4.

The cluster gear

5.

Dis-

10.

Remove the differential and axle assembly, the brake shaft gear and the input gear and shaft. See Figure

7.

Remove the input shaft seal.

FIGURE

8.

Remove the low and reverse, and the high and second sliding gears. placed, refer to Service Note

9.

Lift

the brake shaft gear slightly, and rotate the

transmission case to the right and upward, over

the

top of the input gear. Position the case that the differential ring gear tween the two seat spring bosses. The case may now be removed by working it up over the ferential ring gear.

5

6

If

either gear

3,

Page

is

centered

is

to

9.

be

re-

so

be-

dif-

FIGURE

11.

To remove the reverse idler gear, drive out the roll pin from the pin and gear. See Figure

a roll pin at each end of the idler gear pin.)

12.

Before removing the

mating parts should be marked or they may be reassembled properly. The shift fork retaining roll pins may

ing them out with a

the

shift

lever tower. Remove the

ing sure to catch the two bails, spring and stop

pin as they are released. NOTE: Although the shift forks are identical, the shift rails differ. The low and reverse shift rail (located nearest

idler

7

8

gear pin and remove the

8.

(Early models used

shift

forks and

be

removed by driv-

1/8”

punch inserted through

shift

rails,

scribed

rails mak-

so

the end of the case) has three equally spaced detent grooves. has two of the three detent grooves closely spaced.

The

high and second shift rail

Cleaning, Inspection, Bearing and Oil Seal Replacement

slide into position, making sure the detent grooves are toward the opposite shift rail. Se-

shift

cure the

1”

roll pin.

4.

Position the low and reverse

so

that the center (neutral) detent groove lines

up with the detent hole and install one of the

stop balls, spring and the shift stop pin.

fork to the shift rail with a

shift

rail assembly

x”

Thoroughly clean all parts and inspect for damage and wear. Use suitable arbors when replacing bearings. Always renew all oil seals and gaskets.

If

the differential and axle assembly

iced, refer to Differential Overhaul Section.

5003 - 5010 3-SPEED

TRANSMISSION

is

to

be

serv-

Assembly:

1.

Install the reverse idler gear in position the chamfered end of the gear faces

side

of

the

case.

This

will position the gear with

the straight edge toward the right side of

case, as shown in Figure idler pin and secure with a

9.

Install the reverse

3/16”

roll pin.

so

the

that

left

the

5.

Place the other ball on top of the spring and push the ball and spring through the high and second ball second shift rail

6.

Position the shift fork on the groove faces the opposite to slide the rail into place, making sure the tent grooves are facing the stop ball. Secure the

shift

rail bore with a

is

flush with the bore. Insert the high and

shift

rail, removing

passes

fork to the

the ball.

shift

rail with a

3/16”

punch until

the

punch as

shift

rail

shift

rail, and continue

1/8”

x

so

1”

the

shift

de-

roll pin.

FIGURE

2.

Position the low and reverse shift fork (the one nearest the end of the case) between rail supports toward the opposite

3.

Insert the low and reverse with the equally spaced detent grooves) and

so

that the

shift

9

shift

lever groove points

rail.

shift

rail (the one

the

shift

-8-

FIGURE

Place the

7.

input gear and shaft assembly.

Install

8.

to

hold in position.

9.

Install the brake shaft gear.

10.

Install the differential and axle assembly. Figure

gear and differential assembly in position.

right

side cover in a vise. Install the

the

side cover gasket using gasket sealer

10

showing the input gear, brake shaft

10

See

Figure

10.

FIGURE 11 FIGURE 12

11.

Before installing transmission case make sure that it right side cover. tower to the front and toward you, as in Figure

is

positioned properly in relation to the

This

will place the shift lever

11.

12.

To

install

the

case, work ential ring gear, and seat case in position. Make sure the brake shaft gear and differential assembly are seated.

13.

Position the high 'and second sliding gear (the smaller one) on the lower shift fork. Position the low and reverse (the larger one) on the up-

per shift fork. When properly installed the

shift

fork grooves will

er.

See Figure

14.

Install the cluster gear assembly.

15.

Install the spline shaft and pinion gear and seat in position.

16.

Install the right side cover bolts.

this

at

17.

Make sure

insert set screw and lock nut. too tight, as

18.

Install the shift lever rubber boot.

time.

shift

lift

11.

shift

forks are in neutral position and

lever and secure with the retaining

it

may bind the shift lever.

it

down over the differ-

the brake shaft gear slightly,

be

adjacent to each oth-

See

Do

not tighten set screw

Figure

not tighten

12.

19.

Turn input shaft and shift transmission into all

ranges ly assembled.

Install gasket on left

20.

sealer to hold in place.

21.

Install left side cover over the axle and brake

shaft and tap gently into position, making sure

that all bearings and shafts are properly seated.

22.

Install left side cover retaining bolts and torque all bolts on both side covers evenly.

23.

Check

a free neutral.

24.

Carefully install all new

check

25.

Install the brake shaft Woodruff key and install the brake drum. Secure the brake drum with the snap ring. Install the anchor bracket with

26.

Fill

cant. The The to

to

determine

transmission for proper operation and for

for free operation.

transmission to check plug level with lubri-

fill

plug

check

plug

the

axle tube.

if

the unit has been proper-

side

cover using gasket

oil

seals and again

the

brake band and fasten to

the

two bolts.

is

located on top of the case.

is

on

the

right side cover next

5003

-

5010

DIFFERENTIAL

OVERHAUL

For removal of differential assembly, see Trans-

mission Disassembly Section.

Disassembly:

1.

Drive the roll pins from the end of the ential pins, remove the pins (early models used

the

roll pins at each end of remove the spider gears. See Figure

differential pins) and

1.

differ-

FIGURE

3.

lift

the axle gears out of the case. Remove the

Woodruff keys from the axles.

2

FIGURE

2.

Drive the roll pins out of the axles and pull the axles from the axle gears. See Figure

1

2.

Cleaning, Inspection,

Thoroughly clean and wear. ings. required, refer to Service Note

Figure 3 shows a breakdown of the entire differential assembly.

Use

a

suitable arbor when replacing bush-

If

replacement of the differential case or gear

Parts

all

parts and inspect for damage

Replacement

5,

Page

12.

is

5003

-

501

0

DIFFERENTIAL

2.

Place the Figure through the spiders and secure with roll pins.

spider

6,

slide the differential pins into position

gears in position, as shown in

FIGURE

1.

To assemble the differential (see breakdown Figure

4)

place the axle gears in the differential case, insert the Woodruff keys in the axles, the axles into the axle gears and drive in the retaining roll pins. (Figure gears and roll pins assembled.)

not

slide

freely into the axle gears, place a spacer between the two axle gears, which will hold them apart enabling the axles to be driven into position.

4

5

shows

the

If

the axles will

slide

axles,

NOTE:

as

should be in the same direction. er operation.

For installation in transmission case, the Transmis-

sion Assembly Section.

The spiders must be placed in position

shown, and the diagonally opposite spiders

Check

for prop-

FIGURE

5

-

11

-

5003

1.

TRANSMISSION COVERS

All #5003 production transmissions and the early #5010 transmissions were equipped with ball bearings on the brake shaft. Late #SO10 transmissions and replacement transmissions of both models were pro-

duced with needle bearings. To insure receiving the correct side covers, please order as follows:

PART

NO.

DESCRIPTION USED

AND

5010

ON

SERVICE

NOTES

TYPE

OF

BEARING

OIL

SEAL

'

#3504 RIGHT COVER #3509-59 #3509-59A #3509-60

#

3509-60A

2.

#3559

A.

B.

3.

SPLINE

All tractors and replacement transmissions produced previous to tractor Serial No. 11628, contain Part

NO. 3521 Spline Shafts with 10 straight

3526.

All tractors and replacement transmissions produced after tractor serial number 11628, contain Part No. 3521 Spline Shafts with 11 involute tooth form splines and matching gears, Part Nos. 3523, 3524 and

3526. The matching gears for part numbers are identical.

It or the #3526 Splined Pinion Gear, the number of Splines on

eliminate the possibility of receiving gears which will not assemble on the Spline Shaft.

The ordering of the #3521 Spline Shafts should be handled in the same manner.

4.

#3559

BRAKE SHAFTS

Original equipment brake shafts used in ball bearing type transmissions cannot be used with needle

bearing

Presently stocked brake shafts and those used in needle bearing transmissions are interchangeable.

To

install in ball bearing transmissions, use four 1197 Shim Washers between the brake shaft gear

and the left side cover plate.

SHAFT AND MATCHING GEARS

is

suggested that, when ordering the #3523 High and Second Gear, the #3524 Low and Reverse Gear

BRAKE SHAFT

side

LEFT

COVER

LEFT

COVER

LEFT

COVER #5010

LEFT

COVER #5010 #1508 NEEDLE BEARING

covers.

the

ALL

#

5003

#

5003

#

1519 BALL BEARING

#

1508 NEEDLE BEARING

#

1519 BALL BEARING

#

# #

sides

splines and matching gears, Part

two types of Spline Shafts are NOT inter-changeable, although the

the

#3521 Spline Shaft be noted.

Nos.

3523, 3524 and

1234 1303 1234 1303

This

will

The original #3559 brake shaft has been replaced with a new design. The new shaft has more strength and able to carry more load.

The #3502 differential case and gear has been replaced with part #7243 and #3559 (See Figure A). If

5.

original #3559 or #3502 are required, order A. The original construction

is

shown in the exploded view drawing.

both

new parts #3559 and #7243. The new parts are shown in Figure

FIGURE

-

A

12 -

either

the

5003 - 5010

TRANSMISSION

**

***

* 13

Ref.

No.

1

2

3 4

5 6

7 8

9

10

11

12

14 15

16

17

18

19 20 21 22 23 24 25 26 27 28 29

30

Part

No.

3504

1234 1519

3536

1108 1502 1122

3533

3559 3522

1518 3523 3524 3526 920082-4 3521 3528 3525 3527

1504

1

243

3573 3518

351 7

3503

3520

1516 933 188 3519 3515

When ordering parts always list Part

(Specifications subject

Description

Right Transmission Cover

Seal

Oil

Ball

Bearing Gasket Transmission Pipe Plug

Ball

No.

Cluster Shaft

Brake Shaft and Gear Input Gear

Needle Bearing

Hi low & Reverse Splined Pinion

Lockwasher Spline Shaft Cluster Shaft Reduction Pinion Cluster Cluster Shaft Reduction Gear

Bronze Bearing

Cup Plug

Spring

Ball

Shift Fork

Reverse Idler

Bearing

Roll Pin

Reverse Idler Pin

Shift

1/8”

Bearing

9

Woodruff

h

Second

Gear

5/16

-

Shift

-

Shift

-

stop

-

3/16

Rail - Front

Key

Gear

5/16

Dia.

Stop

Gear

with Bearing Reverse Idler Gear x

1

__-

No.

Req'd.

1

2

4

2

1

3

4

1 1 1 1

1

18

1

1 1 1

2

1

2

1

6

1

No.

and name of part.

to

change without notice.)

Ref.

No.

31 32

33

34

**

35

36

37

38

39 40 41 42

****

43

44

45

46

47

48

49

50

51

52

53

54

55

56

57

58

59

Pa

rt

No.

3516 933156

1013 3501 3509 90801 6-4 1503 1257 3532 937022 1517

17

9332 3502 3535 933194 3530

1

353 1001 3538 3577 933168 3514

1239 915111-6

9361

25

3543

3540

920081

-4

908002-4

Description

-

Shift Rail

Roll

Pipe Plug Transmission Housing

left

Transmission Cover Hex Bolt Bronze Bearing

Oil

Seal Axle Key

-

Bronze Bearing

Roll

Differential Case and Gear Differential Pins

Roll

Axle

Spider Gear - Differential Knob lever Boot - Shift lever

Roll

Collar - Shift Lever

¼-20

Nut - Hex Snap Ring Brake Band with liner Brake Drum

lockwasher

Hex

Rear

x

1

5/16-18

x

5/8

Woodruff No.

Pin x

Gear - Differential

1½

3/16

x

1¾

-

Shift

5/32

x

13/16

x

3/4

Dog Point Set Screw

¼-20

3/4”

Truarc

1/4”

Dm.

Bolt

¼-20

x

5/8

15

No.

Req’d.

1

2

1 1

1

18

2

2 2 4

2 2

1

4

2 2

1

1 1 1 1 1 1 1

2

*See

Service Note

**See

Service Note

***See

****See

Service

Note

#3

#1

#2 & 4 #5

-

14 -

Section

II

5053 - 5058

3-SPEED UNlDRlVE

DESCRIPTION

The 3-speed unidrive transmission transmission utilizing sliding gears and splined shafts for easy shifting.

bearings supported by the transmission case. The transmission case consists of R.H. and L.H. cast iron Model

case halves which are dowelled for alignment and bolted securely together. gear differential.

The model numbers 5053 and section stand for the full line sions produced since

All

shafts operate on needle or ball the spur gear differential.

of

1961.

is

an all-gear Model 5053 covers all standard models

5058

used in

unidrive transmis-

1st

gear

2nd gear

3rd

gear

Reverse

this

...............

..............

...............

................

5025, 5046, 5048, 5049,

5058

5047, 5051, 5059,

66.8

to

42.4

to

24.6

to

51.5

to

and

5053)

equipped with

covers all heavy duty models

and

5058)

incorporating the bevel

1

(5007,

(5045,

REMOVAL AND REPLACEMENT

Removal:

These basic instructions apply to all tractors

equipped with Unidrive transmissions. Deviate from

them as necessary for any particular tractor.

Remove mid-mounted or trailing attachments, or

hitches

moval. Support the tractor frame ahead of the transmission just enough that the rear wheels no longer carry any weight.

guard, and belt. Disconnect the brake rod or remove the brake band from the anchor bracket. On most Drain lubricant, remove wheels, and clean transmodels, remove the fender and seat assembly.

which might interfere with transmission re-

remove the R.H. foot

rest,

if

so

equipped,

belt

If

necessary to gain clearance, remove and instruction plate located just ahead of the shift lever.

Remove two cap screws that fasten through the bottom of the tool box into the top of the transmission. Remove four cap screws that go through the frame butt plate into the front of the transmission. Lower the front of the transmission, guide the shift lever down between the frame rails, and roll the transmission and wheel assembly

mission as necessary before disassembling.

the

free

of the tractor.

dust cover

Installation:

NOTE:

used to facilitate transmission installation. To make lower

the studs, cut the heads off of two

head or carriage bolts. Grind a taper on the un- Install input pulley, axle hubs and wheels. Move threaded end of each bolt. Screw one stud into one of the upper holes in the front of the transmission

It

is

recommended that two Pilot studs

3/8"-16

be

case. Put the other one in

the

diagonally opposite

hole.

x

2"

hex

the transmission assembly into place and guide the shift lever up between the frame rails. Align the pilot

studs with the corresponding holes in the frame butt Connect brake linkage. Install dust cover, instruc-

plate and push the transmission firmly in place tion plate, fender and seat assembly, drive belt, belt

against the plate. Install cap screws in the top

the transmission and the open holes in the front, and

tighten them until snug. Remove the pilot studs one at a time, replacing them with cap screws. Tighten gear oil. Remove support from beneath tractor frame. all six cap screws securely. Test tractor operation.

of

guard) foot rest, etc.

Fill

the transmission to proper level with

S.A.E.

90

UNlDRlVE TRANSMISSION

Disassembly:

These

instructions apply to all unidrive models un-

less

indicated.

models will

1.

Remove axle hubs and input pulley.

2.

Place suitable holding fixture, as shown in Figure

A

section applying only to specific

be

so

identified.

the

transmission assembly in a vise or

5053

1.

-

5058

FIGURE

7.

Remove paint and burrs from both axle shafts, brake shaft, and the input shaft.

2

FIGURE

3.

Place the gear shift lever in neutral and pull the gear shift lever rubber boot away from the transmission boss. Loosen the gear shift lever

retaining lock nut and set screw and remove the gear

4.

Remove the two

and remove the brake band.

5.

Remove the brake drum retaining ring and re-

move the brake drum using a suitable puller

as required.

6.

Remove

retain the right hand and left hand cases.

shift

the

See

six

lever.

(2)

Figure

(6)

1

brake band retaining bolts

2.

3/8’’

x

16

bolts and nuts that

8.

Remove the left hand case, as shown in Figure

FIGURE

3

3.

9.

Lift out the axle and differential assembly. Figure

4.

Note:

If

only the differential

hauled the transmission need not be further

assembled. See Differential Overhaul Section.

10.

Shift the 2nd and high into the 2nd speed position. See Figure

shift

is

fork assembly up

LOW

to be over-

dis-

4.

&

REVERSE

SHIFT

(NEUTRAL POSITION)

FORK

FIGURE 4

The following steps

unidrive models except

5058

and

5059

follow steps

11.

Remove the splined pinion shaft and gear. At

the same time the cluster gear assembly may be

removed. See Figure

11

5058

5.

through

and

1A

17

5059.

through

apply

For models

7A.

to

all

FIGURE

14.

Place the shift forks in neutral and remove first the low and reverse shift rail and fork assembly, then the 2nd and bly, being careful not to lose the two stop balls, spring and stop pin ure

8.

high

6

7

shift rail and fork assem-

as

they are released.

Fig-

FIGURE

12.

Remove the brake shaft gear assembly and the reverse idler gear. See Figure

Remove the 2nd and high sliding gear and the

13.

low and reverse sliding gear, as shown in Figure

5

6.

7. FIGURE

-

17 -

8

15.

Remove the reverse idler shaft and the input

shaft and gear. See Figure

idler

shaft may sometimes stick in the left hand

case.

9.

Note: The reverse

FIGURE 9

16.

If

it

is

desired to replace

may easily

able arbors. When replacing bearings they should

be

pressed in

inside of the case, as shown in Figure

be

removed and installed with suit-

so

that they are flush with the

the

case bearings they

IDLER

10.

17.

The cluster gear may be disassembled, as shown in Figure

fully to avoid damage to the woodruff keys and

bushings. The cluster gear bushings may be removed and installed using suitable arbors.

The following steps

drive models

1A.

Remove the cluster gear assembly, the brake shaft assembly, and the reverse idler gear and shaft.

11.

Disassemble and assemble care-

1A

5058

and

through

5059

7A

only.

apply

to

Uni-

FIGURE 10

FIGURE 12

2A.

Remove the splined pinion gear from the input

shaft.

3A.

Place the low and reverse shift rail and fork assembly (the one nearest the end of the case) together

with the low and reverse sliding gear making

sure removed. See Figure 12.

4A.

Remove the 2nd and high shift rail and fork

assembly together with the 2nd and high sliding gear.

5A.

Remove the remaining stop ball, spring and stop pin.

6A.

Remove the input shaft and gear assembly.

7A.

Refer to step

shift

fork in neutral and remove the

to

catch the stop ball as the shift rail

17

if

cluster

is

to

be

overhauled.

Cleaning, Inspection, Bearing and

Oil

Seal Replacement

is

FIGURE 11

Thoroughly clean all parts and inspect for damage

Use

and wear. ings. Always renew all oil seals and gaskets.

-

18

-

suitable arbors when replacing bear-

UNlDRlVE

TRANSMISSION

5053

-

5058

Assembly:

Place

the

right hand case in a vise or other suit-

able fixture for assembly, as shown in Figure

13.

FIGURE

The following steps apply to all unidrive models

except

5058

and

5059.

1B

through

1.

Install the input shaft and gear, and reverse

idler

17B.

shaft, as shown in Figure

For

these models,

13

follow

14.

steps

FIGURE 15

Install the 2nd stop ball and using a punch

4.

push the ball in against the spring. Move the

'2nd

&

high

shift

rail into the neutral position

and continue to push on the punch until the ball

is

flush with the

insert the low and reverse shift rail and fork 'assembly, removing the punch, as the shift rail passes the ball. and

16.

shift

rail bore. At the same time

See

Detent Drawing. Figure

15

FIGURE 14

2.

Install the 2nd and high shift rail and fork as-

(the

sembly

grooves.) See Figure

3.

Install one stop ball, spring and stop pin. Refer

to detent drawing and Figure

one with the unequally spaced detent

16.

15.

-

19 -

FIGURE

16

5.

Shift

the 2nd and high speed position and install the 2nd and high sliding gear, and the low and reverse sliding gear in position on their respective forks, Figure

17.

Note that the shift fork grooves

gears face each other, and that

is

the two gears goes on the bottom,

the 2nd and high gears which

shift

fork into the 2nd

of

the

the sliding smaller of

FIGURE 19

FIGURE

6.

Install the reverse idler and the brake shaft, as shown in Figure end on the reverse idler goes down.

7.

Install the splined shaft and gear through the

two splined sliding gears seating the bottom end of the shaft into the input gear bearing.

Figure

fully seating it in its bearing and meshing it

with its related gears.

8.

Install the differential and axle assembly, as shown in Figure nuts are up toward the

19.

18,

Install the cluster gear assembly care-

17

making sure that the flanged

20,

making sure that four

L.

H.

case.

See

(4)

FIGURE 20

9.

Place shift forks in neutral position and check for a free neutral and proper operation in all gears.

10.

Install a new case gasket holding it in place with gasket sealer and install the

11.

Install the six tighten all bolts evenly to avoid distortion.

12.

Install the shift lever assembly and retain with the set screw and lock nut. Install gear shift

lever rubber boot.

(6)

3/8''

x

16

left

bolts and nuts and

hand case.

FIGURE

18

-

20 -

13.

Check

again for a free neutral and operation in

all gears.

14.

Install the brake shaft Woodruff key and install the brake drum. Install the brake drum retaining snap ring.

15.

Install the brake band and secure with the two retaining bolts.

Assembly

of

5058

Series With

Bevel Gear Differential

18. Install the input shaft and gear assembly.

the

2B. Install

sembly (the one with the unequally spaced detent grooves) together with the 2nd and high sliding gear (the smaller of sliding gear fits down over the input shaft with the shift fork groove up.

3B.

Install one stop ball, spring and stop pin.

drawing Figure

4B.

InstaII the 2nd stop ball and using a punch push the ball in against the spring. Move the 2nd

&

continue to push on the punch until the ball flush with the shift rail bore. At the same time insert the low and reverse shift rail and fork assembly together with the low and reverse sliding gear, removing the punch as the shift rail passes

the

ball. The low and reverse gear input shaft with the shift fork groove down.

Figure 21.

2nd and high shift rail and fork as-

the

two sliding gears).

See

Figure 21.

15.

high shift rail into the neutral position and

(See

detent drawing Figure 15.) Note:

fits

down over the

The

See

is

See

12B. Install a new case gasket holding

gasket sealer and install the left hand case.

13B.

Install the six (6) x 16 bolts and nuts and

tighten all bolts evenly to avoid distortion.

14B. Install the shift lever assembly and retain with

set

the rubber boot.

15B. Check again for a free neutral and operation

in all ranges.

16B. Install the brake shaft Woodruff key and install

the

snap ring.

17B. Install the brake band and secure with the two

retaining bolts.

screw and lock nut. Install gear shift lever

brake drum. Install

the

brake drum retaining

it

in place with

DIFFERENTIAL OVERHAUL

STANDARD DIFFERENTIAL

Disassembly:

1. Remove

the

four

(4)

retaining bolts and nuts.

2. lift

3.

4.

5.

FIGURE

5B. Install the splined pinion shaft gear down over

the input shaft gear and through the two sliding gears.

6B.

Shift the 2nd and high shift rail and fork assem-

bly in to 2nd speed position.

7B. Install the reverse idler gear shaft and gear

assembly making sure that gear goes down.

8B.

Install the brake shaft gear.

98.

Install the cluster gear assembly.

the

10B. Install

the differential bolt heads down. This will place the left hand differential case with the threaded 7. bolt holes up. driving out the roll pins.

11B. Place shift forks in neutral position. Check for Figure 2

a

free neutral and proper operation in all ranges. standard differential assembly.

differential and axle assembly with remaining axle shaft and gear from the case.

21

the

shoulder of the

6.

off

the

differential side case together with

the axle shaft and gear.

Remove the axle shaft and gear from the case. Remove the differential bull gear.

Note position of the four pinions are installed in opposite directions, which make the position of the diagonally opposite

pinions the same.

Remove the pinions and shafts and remove the

The

axle shaft gears may easily be removed by

is

an exploded view of the complete

See

FIGURE

(4)

Figure

1

pinions. Adjacent

1.

FIGURE

2

STANDARD DIFFERENTIAL

Assembly:

1.

If

the axle gears were removed install them on

the axles and install the retaining Install one of the axle and gear assemblies in

2.

the differential case and install the four pinion shafts.

Install two

3.

onally opposite each other, and install the other two

(2)

opposite each other. See Figure

4.

Install the differential bull gear.

5.

Install the remaining axle and gear assembly in the remaining differential case.

6.

Position the axle and gear, and differential case over the pinion shafts, mesh the gears and seat the case against the ring gear.

7.

Center the bull gear and install the four retaining bolts and nuts. Tighten securely and evenly to avoid distortion.

(2)

pinions with their teeth

pinions with their teeth down diagonally

roll

1.

BEVEL GEAR DIFFERENTIAL

Disassembly:

Install differential assembly in a vise, the case

1.

with the threaded holes should be down. Remove

the four

one of the axle shafts, gear, thrust washer and differential case half as an assembly. See Figure

3.

2.

Remove the bull gear, differential pinion shaft, differential gears and differential blocks as an assembly.

Slide the differential blocks and gears toward

3.

the center and remove the assembly from the

bull gear. The differential blocks and gears may now be removed from the shaft.

The axle shafts, gears and thrust washers may

4.

now be removed from the differential case.

5.

The

shafts by removing the roll pins. of the parts

(4)

bolts and lock washers and remove

axle gears may be removed from the axle

is

shown in Figure

A

break down

4.

up

pins.

diag-

(4)

FIGURE

3

4

BEVEL GEAR DIFFERENTIAL

Assembly:

1.

If

the axle gears have been removed from the

axles install the gears and retain with the

pins.

2.

Install a thrust washer on each axle next to the gear.

3.

Install the short axle, gear and thrust washer assembly into the. threaded left hand differential

case.

4.

Install differential shaft, gears and blocks as an

assembly into the bull gear and push the gears

and blocks outward, seating the blocks into

position in the bull gear.

Install the bull gear, differential shaft, gears and

blocks as an assembly onto the differential case

seating the differential block and bull gear. See Figure

5.

Install the right hand (long) axle gear, and

thrust washer assembly into the right hand

di

Install the right hand case and axle assembly onto the bull gear and center over the differential blocks. Secure with the

washers. Tighten evenly making sure the assem-

blies

3.

differential case.

4-3/8"

seat properly.

roll

bolts and

- 23

-

Item

No.

1

Part

No.

3900

Description

Care R.H.

5053

When ordering ports always

TRANSMISSION

(Specifications subject

~-

No.

Req'd.

1

PARTS

list

Part No. and name of part.

to

change without notice.)

Item

No.

32

Part

No.

933 156

LIST

Description

Roll Pin x

1

No.

Req'd.

2

~-

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

1533

1528

1508

1532

1529

1303

1232

3915

3901

1530

1531

3905

3906

4235

3909

908

1

46

1316

3904

3908

93321 7

3522

1518

3523

3907

3524

3526

9361 25

5615

5616

3503

Bearing

-

Ball

1½

-

Bearing

Seal

Case

Bearing - Needle

Bearing

Case - Differential

Gear

Shaft

Bolt

Nut Huglock

Axle - Rear

Gear

Roll Pin x

Gear

Bearing - Needle

Gear Hi

Shaft Spline

Gear

Snap Ring

Rail

Fork

Needle

-

Needle I.D.

-

Needle

-

Needle ¾ I.D.

-

Oil ¾ Shaft

-

Oil

1"

-

Dowel

L.H.

-

Needle

-

Differential Bull

-

Differential Pinion

Hex

5/16-18 x 3¼

5/16-18

-

Axle

-

Input

&

2nd

-

low

&

-

Pinion - Splined

¾

Truarc

-

Front Shift

-

Rear Shift

-

Shift

Shaft

1½

Reverse

I.D.

1"

5/8

I.D.

2

1

3

2

1

2

1

4

5

4

2

1

i

1

2

33

34

35

36

37

38

39

40

41

42

43

44

45

46

47

48

49

50

51

52

53

54

55

56

*57

'58

'59

'60

*61

'Not inc

351 7

351 8

561 4

3525

1504

3528

3527

3910

9370

1

4

4204

1516

3903

3902

937022

1

9361 3

7376

908062-4

92008 1-4

943460

943420

391 2

908043-4

908038-4

915113-6

5632

3577

1239

9151

11-6

1001

led in No.

5053

Ball

-

Shift

Stop

Spring

-

Shift

Stop

-

Shift

Stop

Gear

-

Cluster

Bearing

-

Bronze ¾ I.D.

-

#9

-

#

3/8

Nut Hex

Assembly.

Reduction Pinion

Reduction

Cluster Gear

Woodruff

Reverse Idler

-

Bronze ½ I.D.

Brake Shaft

Brake

15

Woodruff

1"

Shaft

¼-20

¼

Dia.

Pipe

3/8-16 x 3½

3/8-16 x 2

3/8-16

Nylok

Shift

Stick

¼-20

Nylok

Gear

Shaft

Key

Gear

Bushing

Gear

Drum

Key

Snap Ring

Ass'y. Brake Band

Bolt Hex

Lockwasher

Plug Pipe

Plug

Gasket

Bolt Hex

Nut Hex

Ass'y.

Boot - Shift Stick

Set Screw Dog Point

Knob

2

1

&

lining

x

1

5

6

1

¼-20

x

1

- 24

-

- 25

-

Item

No.

I___

Par)

No.

Description

5058

When ordering parts always

TRANSMISSION PARTS

(Specifications subject to change without notice.)

No.

Req’d.

list

Port No. and name of part.

Item

No.

Par)

No.

LIST

Description

No.

Req’d.

4

5

7

9

10

11

12

13

14

15

16

17

1

2

3

6

8

6940

1533

1532

1508

1526

1529

1303

1213

3915

694

1530

1531

1232

2822

6446

2821

2820

Case R.H.

Ball

Bearing

Bearing - Needle

Bearing

Seal - Oil ¾ Shaft

Seal

-

Pin - Dowel

1

Case L.H.

Bearing

Seal

-

Case - Differential R.H.

Case

Gear

Gear - Axle

1½

I.D.

-

Needle

-

Needle

-

Needle

Oil

1-1/8

Shaft

-

Needle

-

Needle

Oil

1”

Shaft - Brake

-

Differential L.H.

-

Differential - Bull

1”

I.D.

¾”

I.D.

1-1/8”

I.D.

¾”

I.D.

1”

I.D.

5/8”

I.D.

1

2

1

2

1

2

1

2

33

34

35

36

37

38

39

40

41

42

43

44

45

46

47

48

49

5615

5616

3503

933156

3517

3528

5614

3525

1504

3528

3527

3910

937014

4204

1516

3909

41

66

Rail

-

Front

Shift

Rail - Rear

Fork - Shift

Roll Pin x

Ball

Spring

-

Gear

Bearing - Bronze ¾ I.D.

Gear

Shaft - Cluster Gear

Key

Gear

Bushing

Shaft

Gear - Brake Shaft

-

Shift Stop

-

Shift

Stop

-

Cluster

-

Reduction Pinion

-

Reduction

#9

Woodruff

-

Reverse Idler

-

Bronze I.D.

Shift

1

Stop

1

2

1

2

1

2

1

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

2819

2828

2826

2827

6450

6451

9332 17

908043-4

1

56-4

920

5176

1518

51 73

5174

51 75

3

1

9361

Gear

-

Differential Pinion

Washer

-

Thrust

Block - Differential

Shaft - Differential Pinion

Axle

-

Rear

-

R.H.

Axle

-

Rear - L.H.

Roll Pin

Bolt

Washer-Internal Shakeproof

Gear

Bearing

Gear - Hi & 2nd

Gear

Snap Ring

¼

x

1½

-

Hex

3/8-16

x

3½

-

Input

-

Needle

5/8

I.D.

-

Low & Reverse

Gear - Pinion - Splined

-

1”

Shaft

3/8

Dia.

2

1

2

5

4

1

2

1

50

51

52

53

54

55

56

57

58

59

*60

*61

‘62

*63

‘64

*Not included in

3902

937022

4437

908002-4

920081 -4

943460

943420

3912

908038-4

915113-6

5632

1239

9151 11-6

3577

1001

Drum

Key

Ass’y. Broke Band

Bolt

Lockwasher

Plug

Gasket

Bolt

Nut - Hex

Ass’y. Shift Stick

Set Screw Dog Point

Nut - Hex

Boot

Knob

5058

Assembly.

-

#15

-

3/8

-

Brake

Woodruff

Hex

Pipe

Hex

¼-20

x

¼

Dia.

Pipe

3/8-16 x 2

3/8-16

Nylok

¼-20

Nylok

&

Lining

5/8

¼-20

1

2

1

5

6

1

x

¾

1

- 26 -

Section

III

5060

6-SPEED

TRANSMISSION

DESCRIPTION

The 6-speed transmission sion utilizing sliding gears and splined shafts for easy lection. Low range provides an additional 4 to shifting.

supported R.H. and

alignment and bolted securely together.

All

shafts operate on needle or ball bearings duction in each of the 3 speeds forward and also re-

by

the transmission case, which consists

L.H.

cast iron case halves, dowelled for

is

an all-gear transmis- The transmission features high and low range se-

of

verse.

RATIOS

High

Gear

1st gear

2nd gear

3rd

gear

Reverse

The 6-speed transmission also incorporates a spur ditions in which normal differential action would

gear type of limited slip differential.

feature provides increased traction under those con-

The

limited slip transfer power to the wheel with least traction.

Range

66.8 to

42.4 to

24.6 to

51.5

to

low

Range

1

1 1

267.2 to

169.6 to

98.4 to

206.0 to

1

1 1

1

REMOVAL AND REPLACEMENT

1

re-

Removal:

These basic instructions apply to all tractors equipped with 6-speed transmissions. Deviate from them as necessary for any particular tractor.

Remove mid-mounted or trailing attachments, or hitches which might interfere with transmission removal. Support the tractor frame ahead of the trans-

mission just enough that the rear wheels no longer carry any weight.

Remove

guard and the brake band from the anchor bracket. On most

the

R.H.

foot rest,

belt.

Disconnect the brake rod or remove

if

so

equipped,

belt

Installation:

NOTE: It used to facilitate transmission installation. To make the studs, cut

head

or

threaded end of each bolt. Screw the studs into diagonally opposite upper and lower tapped holes in the front of the transmission case.

Install input pulley, axle hubs and wheels. Move the transmission assembly into place and guide the

shift

levers up between pilot studs with the corresponding holes in the frame butt plate and push the transmission firmly against

is

recommended that two pilot studs

the

heads off of two 3/8"-16 x

carriage bolts. Grind a taper on the un-

the

frame rails. Align the

2"

be

hex

models, remove the fender and seat assembly, the dust cover and instruction plate located just ahead of

the shift levers.

Remove the cap screws that fasten through the

bottom of the tool box into the top of the transmission. Remove four cap screws that go through frame butt plate into the front of the transmission.

lower

levers down between the frame rails, and roll transmission and wheel assembly free of the tractor.

Drain lubricant, remove wheels, and clean mission as necessary before disassembling.

the plate. Install cap screws in the top of the transmission and the open holes at the front and tighten them until snug.

them with cap screws. Tighten all six cap screws curely. Connect brake linkage. Install dust cover, instruction plate, fender and seat assembly, drive belt, belt guard, foot rest,

gear oil. Remove support from beneath tractor frame. Test tractor operation.

the

front of the transmission, guide the shift

Remove the pilot studs one at a time, replacing

etc.

Fill

the transmission to proper level with

the

trans-

S.A.E.

the

se-

90

5060 6-SPEED

TRANSMISSION

Disassembly:

1.

Remove axle hubs and input pulley.

2.

Place the transmission assembly in a vise or

suitable holding fixture, as shown in Figure

(shown with levers, brake band, brake drum, hubs, and input pulley removed).

6.

Remove the brake drum retaining ring and remove the brake drum using a suitable puller

as required.

7.

Remove paint and burrs from both axle shafts,

brake shaft and the inut shaft.

8.

Remove the six

1

retain the right hand and

9.

Remove intact, as shown in Figure 2.

10.

lift out the axle and differential assembly. Note:

If

transmission section need not be further assembled. Refer to Differential Overhaul Section.

11.

Shift the 2nd and high

into the 2nd speed position.

the

only the differential

(6)

3/8”

x

16

bolts and nuts that

left

hand cases.

left hand case leaving all gears

is

to

be

overhauled, the

shift

fork assembly up

See

Figure

dis-

3.

I

FIGURE 1

3.

Place the lever rubber boot from the transmission boss. loosen the shift lever retaining lock nut and set

screw and remove the

4.

Remove the roll pin and remove the high-low range lever.

5.

Remove the two (2) brake band retaining bolts and remove the brake band.

shift

lever in neutral and pull the

shift

lever.

shift

FIGURE

12.

Remove the cluster gear assembly, the brake shaft assembly and the reverse idler gear and shaft.

13.

Remove the splined pinion gear from the input

shaft.

14.

With a screw driver or other suitable tool remove

the plug from the detent passage, as shown in Figure

4.

3

FIGURE

2

FIGURE 4

15.

Place

the

shift

forks in neutral and remove the low and reverse shift rail and fork assembly (the one nearest the end of the case) together with the low and reverse sliding gear, making sure

to catch the stop ball and other detent parts

as the shift rail

16.

Remove the 2nd and high shift rail and fork assembly together with the 2nd and high sliding gears.

17.

Remove the remaining detent parts-ball, spring

and stop pin from the detent passage.

18.

Remove input shaft. Figure

the

is

removed.

gear and spline assembly from the

5.

23.

Remove the detent bolt from the

careful to catch the stop ball and spring.

24.

Remove the reduction gear shaft (Figure driving it out toward the inside remove the reduction gear.

25.

Remove the high-low range shift lever and shaft assembly from the inside of the case.

shift

of

the case, and

fork being

7)

by

FIGURE

19.

Remove the input shaft. Figure

20.

Remove the sliding gear from the high-low

shift

fork assembly. Figure

the

input shaft to case thrust washer.

21.

range

Remove

5

5.

6.

FIGURE

7

Needle Bearing Replacement:

If

needle bearings are to be replaced they should

be removed and installed with suitable arbors.

Cluster Gear:

The, cluster gear may in Figure avoid damage to the Woodruff keys and bushings.

The cluster gear bushings may stalled using suitable arbors.

8.

Disassemble and assemble carefully to

be

disassembled as shown

be

removed and in-

22.

Remove

fork assembly. Figure

FIGURE 6

the

high-low range detent bolt and

6.

shift

FIGURE 8

Cleaning, Inspection, Bearing and Oil Seal Replacement

Thoroughly clean all parts and inspect for damage and wear. Use suitable arbors when replacing bearings. Always renew all oil seals and gaskets.

5060

6-SPEED

TRANSMISSION

Assembly:

1.

install in the hole of the right case below the shift rail

supports.

the

high-low range shift lever (Figure

9)

FIGURE

2.

Position the reduction gear assembly in place

with the large gear down and insert the reduc-

tion gear shaft, driving it in place from the inside of the case, as shown in Figure

3.

Assemble the high and low range shift fork assembly (Figure

ball in the detent hole. Using a on the ball, compressing time insert punch as the bolt

10)

the

detent bolt, withdrawing the

9

9.

by inserting the spring and

3/16"

punch, press

the

slides

spring.

in place.

At

the same

FIGURE

6.

lift 'up on the reduction gear and

shaft thrust washer into position. Figure

7.

Install the sliding gear into the high-low range

fork with the groove down. Figure

FIGURE

8.

Install the high-low range sliding gear and thrust washer. Figure

9.

Install the gear and spline assembly over the input shaft, sliding the spline down through the sliding gear. Figure

the

input shaft, sliding it down through

13.

11

slide

12.

12

13.

.the input

12.

FIGURE

4.

Position the detent bolt and the slot of the high and low range shift lever engages the

the

bolt in place until

the shoulder. Torque the detent bolt to

ft.

Ibs.

5.

Using a punch to move the high-low range

shift

lever, check the operation of the detent and

fork assembly.

shift

10

fork (Figure

it

seats securely against

shift

11)

fork

and thread

so

12-17

that

30

-

FIGURE

13

10.

Install the 2nd and high

sembly (the one with the unequally spaced detent

grooves) together with the 2nd and high sliding gear (the smaller of the two sliding gears). sliding gear tits down over the input shaft with the

shift

fork groove up.

11.

Install one of the stop balls, stop spring and stop pin into the detent passage.

shift

rail and fork as-

The

14.

Shift

the 2nd and high

bly into 2nd

15.

Install the reverse

sembly making sure

goes down. Figure

speed

shift

rail and fork assem-

position.

idler

gear shaft and gear as-

the

shoulder of the gear

16.

FIGURE

12.

Install the 2nd stop ball and using a punch, push the ball in against installed shift rail into the neutral position and continue to push on the punch (Figure

is

the ball

same time insert the low and reverse shift rail and fork assembly together with the low and reverse sliding gear, (Figure

punch as the shift rail passes the ball. See tent drawing Figure verse gear fits down over the input shaft with the shift fork groove down.

flush with the shift rail bore. At the

14

the

spring. Move the

15)

removing the

17.

Note: The low and re-

14)

until

de-

FIGURE

16

FIGURE 15

Install the splined pinion gear.

13.

- 31

-

16.

Install

FIGURE 17

the

brake shaft gear.

FIGURE

17.

Install the cluster gear assembly. See Figure

18.

Install

..--the

down

19.

Recheck

proper operation in all gears in both ranges.

Place the

20.

Install a new case gasket holding

with gasket sealer and install

21.

Install the tighten all bolts evenly to avoid distortion.

22.

Install the lever rubber boot.

the

differential and axle assembly with

long end cap and

into the right hand case. Figure

for proper assembly, a free neutral and

shift

forks in neutral position.

six

(6)

the

shift lever assembly and retain with

set

screw and lock nut. Install gear shift

3/8”

18

the

retaining bolt nuts

the

left

x

16

bolts and nuts and

19.

it

in place

hand case.

18.

FIGURE

23.

Install the high-low range selector lever and retain with the

24.

Recheck for a free neutral and proper operation

in all gears and ranges.

25.

Install a new plug to seal the detent passage and drive it in flush with the case.

26.

Install the brake shaft Woodruff key and install the brake drum. Install the brake drum retaining snap ring.

27.

Install the brake band and secure with the two retaining bolts.

3/16”

19

roll pin.

LIMITED

SLIP

DIFFERENTIAL

Disassembly:

1.

Remove the five that retain the end caps to the differential ring gear. Note that the nuts are on the right hand side next to the right hand end cap. Note also that the right hand end cap and right hand axle are longer than the left hand end cap and left hand axle.

(5)

bolts, nuts and flat washers

RIGHT

HAND

LONG END

FIGURE

1

CAP

2.

Remove the axles and end caps by pulling the ax-

les in and out to free the end caps from the roll

Caution,

pins.

end caps.

do not pry under the edge of the

I

FIGURE 2

3.

Remove the ten

cylindrical spring from the differential bodies.

4.

Press the two ferential ring gear.

The right and left differential bodies are iden-

tical with roll pins located next to two

holes. Figure

(10)

differential pinions and the

(2)

differential bodies from the dif-

4.

(2)

bolt

The matching roll pin holes in the left hand end cap are also located next to the bolt holes, each axle. but in the right hand end cap they are between bolt holes as shown in Figure

6.

5.

Remove the end caps and thrust washers from

6.

The

axle gears may

the retaining snap rings.

be

removed after removing

FIGURE

3

FIGURE to each other. Note, that and axle end cap and axle.

LIMITED

5

shows the differential parts in relation

the

is

noticeably longer than the left hand

SLIP

DIFFERENTIAL

right hand end cap

Assembly:

1.

Install the axle gears on the axles and install

the retaining snap rings.

2.

Place the axle gear to end cap thrust washers on the axles next to the axle gears and install the respective end caps on the axles. Note that the right hand axle and the hub

hand end cap and left hand end cap.

3.

Using the left hand case as a workstand, place the right hand (long) axle and right hand end

cap (long) assembly in the axle housing. Figure

is

longer than the left hand axle

6.

!

HOLE

of

HOLE

the right

FIGURE

5

4

4.

5.

6.

7.

- 33 -

FIGURE

Align the roll pins with their respective holes and seat one of the bodies in place on the end

cap.

Refer

to Figure

Install the ten respective bores. Refer to Figure

Hold the cylindrical spring with suitable pliers,

as shown in Figure

inserting

it

down against the axle gear.

Position the differential ring gear over the body.

After careful alignment press the gear down over

the body until

(10)

it

in the center of the pinions, seating

it

seats on the end cap. Figure

6

7.

differential pinions in their

7.

7

and compress the spring,

8.

With the roll pins up, align the remaining body

with the pinions and using a plastic hammer or

wood

hard the differential ring gear until it seats against the other body. Figure

block carefully tap the body into

9.

10.

Install the five placing a flat washer next to each end cap, placing the nuts on the Figure

10.

(5)

remaining bolts and nuts,

side

of the long end cap.

FIGURE

9.

Align the roll pins and insert the and end cap assembly, seating ential ring gear.

7

8

left

hand axle

it

in the differ-

11.

Torque bolts evenly to avoid distortion end caps. Torque to

FIGURE

20

ft.

9

10

Ibs.

of

the

- 35 -

W

When ordering parts always

(Specifications subject to change without notice.)

list

Part

No.

and name of port.

Item

No.

10 11 12 13

14 15 16 17 18 19

20 21 22

23 24

25

26

27 28 29

30

31

32

33

34 35 36 37 38 39

40

41

Port

No.

1

2

3

4 5 6 7 8 9

7066 1533 1532 1542 1526 1529 1461 1213 3915 694

1

1530 1531 1232 71 94

7195

7196 7197 7198 7199

9081 38-4 915663-4

920009-4 7202 7203

7169

7201 7204 1518 5175 7205 7206 7207 7208 7209 3517 351 8 7213 7214 7200

933209

7235

Description

Case - R.H.

Ball

1½

Bearing Bearing

-

Bearing

-

Bearing - Needle Bearing

-

Seal

-

Oil Shaft

Seal

Oil

1-1/8

-

Dowel

Case

-

L.H.

Bearing

-

Bearing

-

Seal

-

Oil End Cap R.H. End Cap L.H. Gear - Differential Ring Gear

-

Axle

Gear

-

Differential Pinion

-

Washer Bolt

3/8-16

Nut - Elastic Stop Washer - Flat

-

Rear R.H.

Axle

-

Rear Snap Ring Shaft

-

Input

Gear

&

Spline

-

Bearing Pinion Gear Gear

-

Sliding

Gear

-

Reduction

-

Bearing Shaft - Reduction Gear Ass'y. Shift Fork

Ball

-

Stop

Spring

-

Bolt

-

Detent

-

Lever Body

Roll Pin Spring

Shift

-

I.D.

Needle

1"

Needle

5/8"

1-1/8''

Needle ¾ I.D.

Shaft

Needle

1"

Needle

5/8

1"

Shaft - Brake

Thrust

x

3¼

3/8-16

3/8

SAE

L.H.

-

Heavy Duty

Needle I.D.

&

Spline

Needle

3/8

Stop

Cylindrical

I.D.

-

External

No.

Req’d.

1

2

1

1 2 2

1

1 2

10

2

5 5

10

1

1 2

1

1 4

1

2

1

3

2

1

1 2

4

1

Item

No.

42 43 44 45 46 47 48 49

50

51 52

53 54 55

56

57 58 59

60

61 62 63

64

65 66 67 68 69 70 71

72

73

74

75

76

77

78

79

80

81

Port

No.

5173

51 74

5615

5616

3503

9331 56 5614 3525

1504

3520

'

3527

3910

937014

4204

1516

3909

4166

3902

937022

936131 7376

908002-4

92008

943460

943420

391 2

908043-4

908038-4

91 51 13-6

943322

943003

7418

1243 5632 1239 915111-4 3577

1001 7217 933

Description

-

#9

-

#15

-

3/8

Hex

3/8-16

Plug

Screw

Hex

Hi and 2nd low and Reverse

Front Shift

Rear Shift

Shift

1

Cluster

-

Bronze ¾ I.D. Reduction Pinion Reduction

Cluster Gear

Woodruff

Reverse Idler

½"

Brake Shaft

Brake

Woodruff

1"

Shaft

&

Hex

¼-20

X

¼"

Dia.

Pipe

3/8-16

-

3½

3/8-16 x 2

Nylok

3/8

Pipe

x

1

¼-20

x

¾

¼-20

-

Shift

3/16

x

I.D.

Lining

5/8

Dog

Paint

Gear Gear Rail Rail Fork Roll Pin x Pin - Shift Stop

Gear

Bearing Gear Gear Shaft Key Gear Bushing - Bronze Shaft Gear Drum Key Snapring Ass'y. Brake Band Bolt

1

-4

lockwasher Plug Pipe Plug Gasket Bolt Bolt Hex Nut Nipple Coupling Pipe Thrust Washer

Ass'y. Shift Stick

Set

Nut Boot Knob Ass'y. Handle

1

84

Roll Pin

No.

Req’d.

1

1 1

2

1 1 2

1

1 1

2

1

1 1

1

2

1 1 1 1

5

6 1

1

1 1 1

1

2

1

'Not Included in No.

-

36

-

5060

Assembly.

Section

IV

4-SPEED

DESCRIPTION

The

4-speed unidrive transmission transmission utilizing sliding gears and splined shafts for easy shifting. All shafts operate on needle or ball bearings supported by the transmission case. transmission case consists of case halves which are dowelled for alignment and bolted securely together.

R.H.

RATIOS

1st gear

2nd gear

3rd

Reverse

................

...............

gear

...............

................

REMOVAL AND REPLACEMENT

Removal:

These basic instructions apply to all tractors equip-

ped with Unidrive transmissions. Deviate from them as

necessary for any particular tractor.

Remove mid-mounted or trailing attachments, or hitches which might interfere with transmission removal. Support the tractor frame ahead of the transmission just enough that the rear wheels no longer carry any weight.

Remove the R.H. foot rest, guard, and belt. Disconnect the brake rod or remove the brake band from the anchor bracket. On most models, remove the fender and seat assembly. necessary to gain clearance, remove the dust cover

and instruction plate located just ahead of the shift

lever.

Remove two cap screws that fasten through the

bottom of the tool box into the top of the transmission. Remove four cap screws that go through the frame butt plate into the front of Lower lever down between the frame rails, and roll the transmission and wheel assembly free of the tractor.

mission as necessary before disassembling.

the

front of the transmission, guide the shift

Drain lubricant, remove wheels, and clean trans-

is

and

66.8 to

42.4 to

24.6 to

51.5

if

so

equipped, belt

the

an all-gear

L.H.

cast iron

1

1 1

to 1

transmission.

The

UNIDRIVE

Connect brake linkage. Install dust cover, instruction plate, fender and seat assembly, drive belt, belt guard, foot rest, etc.

Fill

A.P.I. Service GL-5 gear oil. Remove support from

beneath tractor frame. Test tractor operation.

Disassembly:

These, instructions apply to all unidrive models un-

less

indicated. A section applying only to

models

1.

Remove axle hubs and input pulley.

2.

Place the transmission assembly in a vise or suitable holding fixture, as shown in Figure

If

the transmission to proper level with S.A.E.

4-SPEED

UNIDRIVE TRANSMISSION

specific

will

be

so

identified.

140

1.

Installation:

NOTE: It used to facilitate transmission installation. To make the studs, cut head or carriage bolts. Grind a taper on the unthreaded end of each bolt. Screw one stud into one

of

the upper holes in the front of the transmission case. Put the other one in lower hole.

Install input pulley, axle hubs and wheels. Move

the transmission assembly into place and guide the

shift

lever up between the frame rails. Align

studs with the corresponding holes in the frame butt

plate and push

the plate. Install cap screws in

mission and the open holes in

them until snug. Remove the pilot studs one at a time,

replacing them with cap screws. Tighten all six cap

screws securely.

is

recommended that two pilot studs

the

heads

the

transmission firmly in place against

off

of two 3/8"-16

the

diagonally opposite

the

top

of

front, and tighten

be

x

2"

hex

the

pilot

the trans-

FIGURE

Place the gear shift lever in neutral and pull the

3.

4.

5.

6.

7.

8.

-

37

-

shift

gear mission boss. Loosen the gear shift lever retaining lock nut and set screw and remove the gear shift lever.

Remove the two

and remove the brake band.

Remove the brake drum retaining bolt and wash-

er, and remove the brake drum. (See Figure

Remove retain

Remove paint and burrs from both axle shafts, brake shaft, and the input shaft.

Remove the left hand case, as shown in Figure

lever rubber boot away from the trans-

(2)

the

six (6)

the

right hand and left hand cases.

1

brake band retaining bolts

2).

3/8”

x

16

bolts and nuts that

3.

FIGURE

4

FIGURE

9.

Lift out the axle and differential assembly. Figure

4.

Note:

If

only the differential

hauled the transmission need not be further

assembled. See Differential Overhaul Section.

10.

Shift the 2nd and into the 2nd speed position. See Figure

2

is

high

shift fork assembly up

to be over-

dis-

5.

FIGURE

11.

Remove the splined pinion shaft and gear. At the same time the cluster gear and brake shaft assembly may be removed. See Figure

12.

Remove the large pinion and reduction gear assembly, (and the thrust washer reverse

NOTE: Prior to

gear and thrust washer was welded together and

was serviced as one part.

idler

gear. See Figure

1973

5

if

used) and the

6.

models the pinion reduction

5.

FIGURE

Starting with the tion gear and thrust washer are serviced separately.

next to the

The

gear with a suitable arbor press.

13.

Remove the 2nd and

3

-

38

low and reverse sliding gear, as shown in Figure

7.

-

The

pinion may be pressed in and out of the

1973

models the pinion, reduc-

thrust washer goes on the stub shaft

big

gear.

high

sliding gear and the

PINION

14.

Place the shift forks in neutral and remove first

the

low and reverse shift rail and fork assembly,

then the 2nd and high shift rail and fork assem-

bly, being careful not to lose the two stop balls,

spring and stop pin as they are released. Fig-

ure

8.

15.

Remove

shaft and gear.

idler

case.

the

reverse idler shaft and the input

See

shaft may sometimes stick in the

Figure

9.

Note:

The

reverse

left

hand

FIGURE

6

FIGURE

9

10

FIGURE

8

-

39

-

FIGURE

11

17.

The

cluster gear and brake shaft assembly may

be

disassembled, as shown in Figure assemble and assemble carefully to avoid damage to the woodruff key and bushings. cluster gear bushings may stalled using suitable arbors.

18.

With a screwdriver or other suitable tool remove the plug from the end of the detent passage.

be

removed and in-

11.

Dis-

The

3.

Install one stop ball, spring and stop pin. Refer

to detent drawing and Figure

14.

Cleaning, Inspection, Bearing

Oil

Seal Replacement

Thoroughly clean all parts and inspect for damage and wear. Use suitable arbors when replacing bearings. Always renew all oil seals and gaskets.

and

Assembly:

Place the right hand case in a vise or other

able fixture for assembly, as shown in Figure

12.

suit-

FIGURE 12

1.

Install

the

input shaft and gear, and reverse idler

shaft, as shown in Figure

2.

Install the 2nd and high sembly (the one with the unequally spaced detent grooves.)

See

Figure

15.

13.

shift

rail and fork as-

FIGURE 14

4.

Install the 2nd stop ball and using a punch push the ball in against the spring. Move the 2nd

high

shift rail into the neutral position and continue to push on the punch until the ball with the the low and reverse shift rail and fork assembly,

removing the punch, as the shift rail passes ball. See Detent Drawing. Figure

shift

rail bore. At the same time insert

14

and

is

15.

&

flush

the

FIGURE 13

FIGURE 15

-

40

-

5.

Shift the 2nd and high shift fork into the 2nd

speed position and install the 2nd and high sliding gear, and the low and reverse sliding gear in position on their respective forks, Figure

16. Note that the shift fork grooves of

gears face each other, and that the smaller of

is

the two gears goes on the bottom.

the 2nd and high gears which

the

sliding

FIGURE 18

9.

Place

shift

forks in neutral position and

for a

free

neutral and proper operation in all

gears.

10.

Install a new case gasket holding

with gasket sealer and install the left hand case.

it

in place

check

FIGURE 16

6.

Install the reverse idler and the large pinion and reduction gear assembly (and the thrust washer

if

used), as shown in Figure

the flanged end on the reverse idler goes down.

7.

Install the splined shaft and gear through the

two splined sliding gears seating the bottom end

of the shaft into the input gear bearing. See Figure

assembly carefully seating it in

meshing

8.

Install the differential and axle assembly, shown in Figure 19, making sure that four nuts are up toward the

18.

Install the cluster gear and brake shaft

it

with its related gears.

L.H.

17,

making sure that

its

bearing and

case.

as

(4)

11.

Install the six (6)

tighten all bolts evenly to avoid distortion.

12.

Install the shift lever assembly and retain with

the set screw and lock nut. Install gear shift

lever rubber boot.

3/8’’

x 16 bolts and nuts and

FIGURE

19

FIGURE 17

13.

Check

14.

15.

16.

-

41 -

again for a free neutral and operation in

all gears. Install the brake drum and secure with the bolt

and washer. Install the brake band and secure with the two

retaining bolts. Install a new plug to seal the detent passage and

drive

it

in flush with the case.

DIFFERENTIAL OVERHAUL

4

PINION

NOTE: Two types of differential pinions are used:

1.

Early type use hollow pinions with separate

shafts.

2.

Late type pinions are one piece with integral

shafts.

1.

Early type axles incorporate roll pin holes and

use roll pins to secure

1

2.

Late type axles incorporate snap ring grooves

and use snap rings to secure

Figure

Disassembly:

1.

Remove the four

2.

lift off the differential the axle shaft and gear.

and

See

Figure 1 and

See

Figure

2.

1A

and

DIFFERENTIAL

2.

1A

and

2A.

the

axle gears.

the

2A.

(4)

retaining bolts and nuts.

side

case together with

See

axle gears.

Figure

See

3.

Remove the axle shaft and gear from the case.

4.

Remove the differential bull gear.

5.

Note position of the four pinions are installed in opposite directions, which make the position of the diagonally opposite pinions the same.

6.

Remove the pinions (and shafts on the early type), and remove the remaining axle shaft and gear from the case.

7.

The

axle shaft gears may easily driving out the roll pins or removing rings as required.

Figure

4

pinion differential assembly.

2 & 2A

See

are exploded views of the complete

(4)

pinions. Adjacent

Figure 1 and

be

removed by

1A.

the

snap

FIGURE 1

I

PIECE

PINIONS

FIGURE 1A

TEETH

A

UP

FIGURE

PINIONS

4

UNION

2

RING

GEAR

DIFFERENTIAL

FIGURE 2A

DIFFERENTIAL

Assembly:

1.

If the axle gears were removed install them on

the

axles and install the retaining roll pins or snap rings as required. Note: Install the snap rings with the sharp

of

the

snap ring toward

axles.

2.

Install one of the axle and gear assemblies in the differential case and on the early type install the four

3.

Install two onally opposite each other, and install the other two

opposite each other.

(4)

pinion shafts.

(2)

pinions with their teeth up diag-

(2)

pinions with their teeth down diagonally

the

See

Figure 1 and

inner end

1A.

of

side

the

42

-

4.

Install the differential bull gear. over the pinion shafts, mesh the gears and seat

5.

Install the remaining axle and gear assembly in

the remaining differential case.

6.

Position the axle and gear, and differential case evenly to avoid distortion.

the case against the ring gear.

7.

Center the bull gear and install the four taining bolts, and nuts. Tighten securely and

(4)

re-

4-SPEED

TRANSMISSION

2-22

2-23

TWO PIECE (PINION

ONE PIECE (SOLID PINION) DIFFERENTIAL

&

SHAFT) DIFFERENTIAL

I

-

43

-

4-SPEED

ITEM

NO.

TRANSMISSION

DESCRIPTION

2-10

2-1

1

2-1 2 2-1 3

2-1 4 2-1 5 2-1 6

2-1 7

2-1 8

2-20

2-2

1

2-22

2-22A 2-23 2-24 2-24A 2-25 2-26

2-27

2-28 2-29

2-30

2-3

1

2-32 2-33 2-34 2-35 2-36

2-37 2-38 2-39 2-40 2-41

2-42 2-43 2-44

2-45

2-46

2-47

2-48

2-49

2-52

2-53 2-54 2-55 2-56

R.

H.

Case

L.

H.

Case Ball Bearing, Needle Bearing, Needle Bearing,

Needle Bearing, Needle Bearing, Oil

Seal,

Oil Seal, Dowel Pin Needle Bearing, Needle Bearing,

Differential Case

Differential Case Differential Bull Gear Differential Pinion Gear

Differential Pinion Gear

Shaft

Axle Gear

¾”

1"

1½”

1"

¾"

1''

¾"

Shaft

¾"

5/8”

Axle

Snap Ring Input Gear Needle Bearing, Hi and 2nd Gear

Spline Shaft Snap Ring,

low

and Reverse Gear

Splined Pinion Gear

Front Shift Rail Rear

Shift

Fork

Shift

Stop Ball

Shift Stop Spring

Shift

Stop Pin cup Plug Cluster Gear

Bronze Bearing, Reduction Gear Cluster Gear/Brake ,Shaft

Reverse Idler Gear

Bronze Bushing, Gear,

44

Gear,

Thrust Washer,

Case Gasket

Shift Stick

Set Screw,

Boot

11

Knob

5/8”

¾"

Rail

¾"

½"

Teeth Teeth

1"

Assembly

¼-20

I.

D.

I.

D.

I.

D.

I.

D.

I.

D.

I.

D.

I.

D.

I.

D.

I.

D.

I.

D.

I.

D.

x

¾

Section

V

8-SPEED TRANSMISSION

DESCRIPTION

The 8-speed transmission sion utilizing sliding gears and splined shafts for easy shifting. All shafts operate on needle or ball bearings supported by the transmission case, which consists of

R.H.

and L.H. cast iron case halves, dowelled for

alignment and bolted securely together.

The

transmission features high and low range selection. Low range provides an additional duction in each of the verse.

3

speeds

is

an all-gear transmis-

4

forward and also re-

to 1 re-

RATIOS

low

Gear

1st gear 66.8 to

2nd gear 42.4 to 1

3rd

gear 24.6 to 1

Reverse

High

51.5

Range

to 1

REMOVAL AND

1

REPLACEMENT

Range

267.2 to

169.6 to

98.4 to

206.0

to

1

1 1

1

Removal:

These basic instructions apply to all tractors equipped with 8-speed transmissions. Deviate from them as necessary for any particular tractor.

Remove mid-mounted or trailing attachments, or

hitches which might interfere with transmission re-

moval. Support the tractor frame ahead of the transmission just enough that the rear wheels no longer carry any weight.

R.H.

Remove the

Disconnect the brake rod or remove the brake band from the anchor bracket. Remove the fender and seat assembly, the dust cover and instruction plate located

just ahead of the shift levers.

Remove the cap screws that fasten through the bottom of the tool box into the top of the transmission. Remove four cap screws that go through the frame butt plate into the front of the transmission. Lower the front of the transmission, guide the shift levers down between the frame rails, and roll the transmission and wheel assembly free of the tractor. Drain lubricant, remove wheels, and clean the transmission as necessary before disassembling.

foot rest, belt guard and

belt.

Remove the pilot studs one at a time, replacing them with cap screws. Tighten all six cap screws curely. ,Connect brake linkage. Install dust cover, instruction plate, fender and seat assembly, drive belt,

belt

guard, foot rest, etc.

Fill

the transmission to proper level with S.A.E. 140 A.P.I. Service GL-5 gear oil. Remove support from beneath tractor frame. Test tractor operution.

se-

8-SPEED TRANSMISSION

Disassembly:

1.

Remove axle hubs and input pulley.

2.

Place the transmission assembly in a vise or suitable holding fixture, as shown in Figure (shown with levers, brake band, brake drum,

hubs, and input pulley removed).

1

Installation:

NOTE:

used to facilitate transmission installation. To make the studs, cut the heads

head or carriage bolts. Grind a taper on the unthreaded end of each bolt. Screw the studs into diagonally opposite upper and lower tapped holes in the front of the transmission case.

Install input pulley, axle hubs and wheels. Move the transmission assembly into place and guide the shift levers up between the frame rails. Align the

pilot studs with the corresponding holes in the frame butt plate and push the transmission firmly against

the

plate. Install cap screws in the top of the trans-

mission and the open holes at the front and tighten

them until snug.

It

is

recommended that two pilot studs be

off

of two

3/8"-16

x

2"

hex

-

45

FIGURE

3.

Place the shift lever in neutral and pull the shift lever rubber boot from the transmission boss. Loosen the shift lever retaining lock nut and set screw and remove the shift lever.

4.

Remove the roll pin and remove the high-low range lever.

5.

Remove the two

and remove the brake band.

(2)

1

brake band retaining bolts

-

rately.

next to the big gear.

be

arbor press.

14.

Remove the splined pinion gear from the input

shaft. With a screw driver or other suitable

15.

the plug from the detent passage, as shown in Figure 4.

The

thrust washer goes on the stub shaft

The

gear and pinion may

pressed in and out of the gear with a suitable

tool

remove

FIGURE

6.

Remove the brake drum retaining bolt and washer, and remove the brake drum using a suitable puller as required.

Remove paint and burrs from both axle shafts,

7.

brake shaft and the input shaft. Remove the six (6)

8.

retain the right hand and left hand cases. Remove the left hand case leaving all gears

9.

intact, as shown in Figure

10.

Lift out the axle and differential assembly. Note:

If

only the differential transmission section need not assembled. Refer to Differential Overhaul Section.

Shift the 2nd and high shift fork assembly up

11.

into the 2nd speed position.

CLUSTER

GEAR

2

3/8”

x

16 bolts and nuts that

2.

is

to

be

overhauled, the

be

See

Figure

&

BRAKE

SHAFT

further

SPLINED

3.

PINION

dis-

GEAR

FIGURE

16.

Place the shift forks in neutral and remove the low and reverse

one nearest the end of the case) together with the low and reverse sliding gear, making sure to catch the stop ball and other detent parts as the shift rail

Remove the 2nd and high shift rail and fork.

1

7.

assembly together with the 2nd and high sliding

gears.

Remove the remaining detent parts

18.

and stop pin from the detent passage.

Remove the gear and spline assembly from the

19.

input shaft. Figure

shift

is

removed.

4

rail and fork assembly (the

-

5.

ball, spring

FIGURE

12.

Remove bly, and the reverse idler gear and shaft.

13.

Remove the large reduction gear assembly. NOTE: Prior to 1973 models the pinion reduction

gear and thrust washer was welded together and was serviced as one part.

Starting with tion gear and thrust washer are serviced sepa-

the

cluster gear and brake shaft assem-

the

1973 models the pinion, reduc-

3

i

20.

Remove the input shaft. Figure

FIGURE

5

5.

21.

Remove the sliding gear from the high-low range shift fork assembly. Figure

22.

Remove the input shaft to case thrust washer.

6.

FIGURE

23.

Remove the high-low range detent bolt and shift

fork assembly. Figure

24.

Remove the detent bolt from the shift fork being careful to catch the stop ball and spring.

25.

Remove the reduction gear shaft (Figure driving it out toward the inside

remove the reduction gear.

26.

Remove the high-low range shift lever and shaft

assembly from the inside of the case.

6.

6

of

the case, and

7)

by

FIGURE

8

Cleaning, Inspection, Bearing and

Oil

Seal Replacement

Thoroughly clean all parts and inspect for damage

Use

and wear. ings. Always renew all oil seals and gaskets.

8-SPEED

suitable arbors when replacing bear-

TRANSMISSION

Assembly:

1.

Install the high-low range shift lever (Figure in the hole

supports.

of

the right case below the shift rail

9)

FIGURE

7

Needle Bearing Replacement:

If

needle bearings are to

be removed and installed with suitable arbors.

be

replaced they should

Cluster Gear:

The cluster gear and brake shaft assembly may disassembled as shown in Figure assemble carefully to avoid damage to the Woodruff

key and bushings. The cluster gear bushings may

removed and installed using suitable arbors.

8.

Disassemble and

be

FIGURE

2.

Position the reduction gear assembly in place with the large gear down and insert the reduction gear shaft, driving it in place from the inside of the case, as shown in Figure

3.

Assemble the high and low range shift fork assembly (Figure

ball in the detent hole. Using

on the ball, compressing the spring. At the same

time insert the detent bolt, withdrawing

punch as the bolt

-

47

-

10)

9

9.

by inserting the spring and

slides

a

in place.

3/16”

punch, press

the

7.

Install the sliding gear into the high-low range

fork with the groove down. Figure 12.

8.

Install the input shaft, sliding it down through

the high-low range sliding gear and thrust washer. Figure

9.

Install the gear and spline assembly over the input shaft, sliding the spline down through the sliding gear. Figure

13.

FIGURE

4.

Position the detent bolt and the slot of the high and low range shift lever engages the shift fork (Figure 11) and thread the bolt in place until it seats securely against the shoulder. Torque the detent bolt to 12-17

Ibs.

ft.

5.

Using a

shift

fork assembly.

6.

Lift up on the reduction gear and shaft thrust washer into position. Figure 12.

3/16''

lever,

punch

check

the operation of the detent and

10

shift

fork

to

move the high-low range

slide

so

that

the input

FIGURE 13

10.

Install the 2nd and high shift rail and fork as-

sembly (the one with grooves) together with the 2nd and high sliding gear (the smaller of the two sliding gears). sliding gear fits down over the input shaft with the shift fork groove up.

11.

Install one of the stop balls, stop spring and stop pin into the detent passage.

the

unequally spaced detent

The

FIGURE 11

FIGURE 12

-

48

FIGURE 14

install the 2nd stop ball and using a punch,

12.

push the ball in against the spring. Move the installed shift rail into the neutral position and continue to push on the punch (Figure

the

ball

is

flush with the shift rail bore. At the' same time insert the low and reverse shift rail and fork assembly together with the low and reverse sliding gear, (Figure

punch as the

shift

rail passes the ball. See

15)

removing the

-

14)

until

de-

tent drawing Figure verse gear fits down over the input shaft with the shift fork groove down.

17.

Note: The low and re-

FIGURE 15

13.

Install the splined pinion gear.

14.

Shift the 2nd and

bly into 2nd speed position.

15.

Install the large pinion and reduction gear assembly (and the thrust washer

16.

Install the reverse idler gear shaft and gear assembly making sure the shoulder of the gear

goes down. Figure

high

shift rail and fork assem-

if

used).

16.

FIGURE 17

FIGURE 16

17.

Install the cluster gear and brake shaft assembly. See Figure

18.

Install the differential and axle assembly with the retaining bolt nuts case. Figure

19.

Recheck for proper assembly, a

proper operation in all gears in both ranges.

Place the shift forks in neutral position.

20.

Install a new case gasket holding it in place

with gasket sealer and install the left hand case.

19.

18.

up

toward the left hand

free

neutral and

!

CLUSTER

GEAR

&

BRAKE

SHAFT

FIGURE 18

Install the six

21.

tighten all bolts evenly to avoid distortion.

22.

Install the shift lever assembly and retain with the set screw and lock nut. Install gear shift

lever rubber boot.

23.

Install the high-low range selector lever and retain with

24.

Recheck for a free neutral and proper operation in all gears and ranges.

the

(6)

3/8''

3/16”

x

16

roll pin.

bolts and nuts and

FIGURE

25.

Install a new plug to seal the detent passage

and drive

26.

Install taining bolt and washer.

27.

Install the brake band and secure with the two

retaining bolts.

it

in flush with the case.

the

brake drum and secure with the re-

19

3.

Remove the axle shaft and gear from the case.

4.

Remove the differential bull gear.

5.

Note position of the eight pinions are installed in opposite directions, which make the position of the diagonally opposite pinions the same.

6.

Remove the pinions and remove the remaining axle shaft and gear from the case.

7.

The axle shaft gears may easily be removed removing the snap rings.

See

Figure

(8)

pinions. Adjacent

1.

Assembly:

1.

If

the axle gears were removed, install them on the axles and install the snap rings side

of

the snap

axle.

2.

Install one of the axle and gear assemblies in the differential case and install the eight as shown in Figure axle gear will mesh with four pinions.

ring

toward the inner end

1.

Properly installed each

with

the sharp

of

(8)

pinions,

by

the

8

PINION

DIFFERENTIAL

See Service Bulletin numbers

Disassembly:

1.

Remove the four

2.

Lift off the differential

axle shaft and gear.

(4)

retaining bolts and nuts.

side

174

&

273

for

im-

case together with the

FIGURE

3.

Install the differential bull gear.

4.

Install the remaining axle and gear assembly in

the remaining differential case.

5.

Position the other axle, gear, and differential

case over the pinion shafts, mesh the gears and

seat the case against the ring gear.

6.

Center the bull gear and install the four

taining bolts and nuts. Tighten securely and

evenly to avoid distortion.

2

(4)

re-

POSITION

FIGURE

OF

PINIONS

1

-

50

-

8-SPEED,

10

PINION

LIMITED SLIP DIFFERENTIAL

(Used

in

5073

Transmission)

ITEM

NO.

3-30 3-74 3-74

3-76

3-77

3-78 3-79 3-80 3-81 3-82 3-86 3-86

Snap Ring

R.

H.

L.

H.

Ring Gear

Axle Gear

Differential Pinion Gear

Thrust Washer

Body Roll Pin

Spring

R.

H.

L.

H.

DESCRIPTION

End Cap

Axle

See

Service Bulletin number

of

sion differential.

limited slip differential to 8-pinion

252

for

conver-

8-SPEED, 4 PINION DIFFERENTIAL

1"

AXLES

(Used

in

5086

Transmission)

ITEM

NO.

3-22

3-23

3-24 3-27 3-29 3-30

Differential Case

Ring Gear

Differential Pinion Gear Axle Gear Axle

Snap Ring

DESCRIPTION

-

51

-

8-SPEED, 8 PINION DIFFERENTIAL

1-1/8" AXLES,

(Used

in 5091. 103907, 103916

ITEM NO. DESCRIPTION

4-1

9

4-20 Axle 4-22 Snap Ring 4-24 Axle Gear

4-25 Ring Gear

4-27 Differential Pinion Gear

Differential Case

&

103918 transmissions)

8-SPEED

TRANSMISSION

-

52

-

8-SPEED

ITEM

NO.

3-10 3-1 1

3-1 2 3-1 3 3-1 4 3-1 5 3-1 6 3-1 7 3-1 8 3-1 9 3-20 3-2 1

3-3

1

3-32 3-33 3-34 3-35 3-36 3-37 3-38 3-39 3-40 3-4

1

3-42 3-43 3-44 3-45 3-46 3-47 3-48 3-49 3-50

3-5

1

3-52 3-53 3-54 3-55 3-56

3-57 3-58 3-59 3-6

1

3-63 3-65

3-66 3-67

3-68 3-69 3 -70

3-71 3-72 3-73

TRANSMISSION

DESCRIPTION

Case

-

R.

H.

Case

-

L.

H.

Ball Bearing 1½'' Needle Bearing 1" Needle Bearing Needle Bearing 1-1/8'' Needle Bearing Seal

-

5/8

Seal

Dowel Pin Needle Bearing Needle Bearing Seal Differential Case Input Shaft Thrust Washer Gear and Spline

Needle Bearing Gear and Spline Pinion Sliding Gear

Reduction Gear

Needle Bearing

Reduction Shaft

Shift

Stop Ball

Stop

Plug

Detent Bolt Shift Lever

Gear Gear

Front Shift Rail

Rear Shift Rail Shift Fork Roll Pin, x 1" Shift Stop Pin Gear and Bearing, Complete Cluster Gear Bronze Bearing

Reduction Gear Cluster Gear and Brake Shaft

#9 Woodruff Key

Reverse Idler Gear

Bronze Bushing Shaft

Nipple

Dipstick Case Gasket

Shift

Set Screw Nut, ¼-20

Boot

Knob Shift Handle Roll Pin x Thrust Washer Gear Assembly Gear 1

Gear 44T

Shaft

-

1-1/8'' Axle

-

Brake Shaft

Fork

Spring

-

Hi and 2nd

-

Low and Reverse

Stick

-

1T

I.

5/8"

¾"

¾”

5/8”

5/8"

3/8''

¾”

½”

Dog Point

D.

I.

D.

I.

D.

D. D.

D.

-

x

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WHEEL HORSE

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FORM NO.

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A-1

392

Toro 31-10K802, 31-10K803, 31-12K802, 31-12K804, 31-16O803 Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

&