Page 1
EATON 751, 781 HYDROSATIC TRANSAXLE
Table Of Contents – Page 1 of 1
751, 851, 771, AND 781 HYDROSTATIC T RANSAX LE
TRANSAXLES 751, 851
TRANSAXLE WITH CHARGE PUMP
781 SERIES HYDROSTATIC TRANSAXLE
AXLE HOUSING DISASSEMBLY
MOTOR ROTOR DISASSEMBLY
TRANSAXLE WITH CHARGE PUMP
PUMP AND MOTOR ROTOR INSPECTION
TRANSAXLE WITH CHARGE PUMP
TRANSAXLE WITH DUMP VALVE
TRANSAXLE REASSE MB L Y
TRANSAXLE WITH DUMP VALVE
TRANSAXLE WITH CHARGE PUMP
TRANSAXLE WITH CHARGE PUMP
COVER REASSEMBLY
TRANSAXLE WITH CHARGE PUMP
AXLE HOUSING REASSEMBLY
781 SERIES TRANSAXLE
TRANSAXLE WITH CHARGE PUMP AND SPI N- ON FILT ER
FLUID RECOMMENDATIONS
TRANSAXLE PART S LISTS
FAULT-LOGIC TROUBLE SHOOTING
DIAGRAM ACTION STEP COMMENTS
Page 2
NO.
7-416
Eaton
Hydraulics
Division
t
751 851 771
and
781
Hydrostatic Transaxle
Page 3
1
The following repair information applies to
the Eaton
751,851,771,
and
781
series hydro-
static transaxles.
Date
of
and Input Rotation Stamped on
Assembly Date
Part Number Input Rotation Build Code
\
Customer
Part Number
(
if
Required
Original Build Factory Rebuild
example
01 01 91 01 01 91 11
2
The transaxle identification information is
010191
Month Day
(CW or CCW)
)
)
Year Number
this Surface
\
(
example
XXXXXX Factory
01/01/91 11
Month
Assembly,
11
)
Rebuilt
Rebuild
Code
Times
located opposite the input shaft, on the back
of the housing assembly.
3
The build code of the transaxles identifies
the month, day and year of the transaxle
manufacture. This information is found in the
same area as the identification code.
4
When ordering replacement parts for a
transaxle, the part(s) order must include the
part name, part number, quantity of parts and
also the transaxle model number, input rotation and date code.
Transaxles 751,851,771, and 781
5
The following procedures describe complete and disassembly and reassembly of the
transaxle.
The level of cleanliness maintained while
servicing the transaxle could affect its perfor-
of
of
(2)
mance. Work in a clean area. After disassembly, wash all parts with clean solvent and blow
the parts dry with air. Inspect all mating surfaces. Replace any damaged parts that could
cause internal leakage.
Do
not use grit paper,
files or grinders on finished parts.
Note:
Whenever a transaxle is disassembled,
our recommendation is to replace all seals.
Lubricate the new seals with petroleum jelly
before installation. Use only clean, recommended hydraulic fluid on the finished surfaces at reassembly.
6
The following tools are required for disas-
sembly and reassembly of the transaxle.
3/8
in. Socket or End Wrench
1
in. Socket or End Wrench
Ratchet Wrench
Torque Wrench
5/32
Hex Wrench
Small screwdriver
[150
N-m) long)
300
(4
Ib-in
in
[102
[34
N-m)
N-m) to 6 in.
No. 5 or 7 Internal Retaining Ring Pliers
No.
4
or 5 External Retaining Ring Pliers
6
in.
[150
N-m) or 8 In.
[200
mm C-clamp
Piece of Pipe or Hydraulic Tubing
(1
in.
O.D.
x 6 inches long)
Piece of Pipe or Hydraulic Tubing
(1-1/8
in.
[29
mm] O.D.
x
6
in.
[150
mm] long)
Small Arbor or Hydraulic Press
3
or 4 Large Rubber Bands
Light Petroleum Jelly (such as Vaseline)
7
Seal all open ports before cleaning. Thor-
oughly clean the transaxle exterior.
8
After draining the transaxle, use your
hand or a filter wrench to remove the filter
from the filter base.
Note:
It is best to drain the transaxle through
the case drain port with the input shaft in the
down position.
2
Page 4
Plugs and
Fittings
781
Series Hydrostatic Transaxle
9
Divide the transaxle halves by removing
only one E-ring retaining the conical spring
on
each
end of the center brake push rod,
then remove four
1/2
inch hex. nuts, the
lock washers and bolts. Pull the two halves
apart carefully, the push rod is the only
adjoining link. Remove the two conical
springs. Safely store these small parts for
final assembly after servicing each
transaxle half. Each half has a flange
attached with eight
.25
Torx
But.
Head
screws. These screws have been secured
with Loctite ( torque ref.-
[14 +1,4
Nm]), flange removal is not recom-
125 f12.5
Ib-in
mended. Service each half separately as
outlined in the following text.
Port Plate
(Horizontal
Valve Cover
(Vertical Mount)
Port Plate
(for Remote Filter)
“U”
Filter
Base
Mount)
Hex.
Hex. Flange Screw
Hex. Flange Screw
Adapter,718-14O-ring
Seal, Square Cut
Flange Screw
(Q
(Qty.
5)
Port
Filter (Internal)
asket
10
Using a
3/8
inch socket or end wrench,
remove the cap screws from
filter base.
valve cover and internal filter.
port plate.
11
Remove gasket.
Note:
This gasket may be on the part just
removed or on the housing assembly.
Spin -on Filter Cartridge
3
Page 5
Clean
Bench C-Clamp
12
Position transaxle with this gasket surface
toward the bench. Place a clean towel between the transaxle and the bench. This towel
protects the sealing surface from possible
damage during repositioning. Use a 6 inch
[I50
mm] to 8 inch
[200
mm] C-clamp to
secure the transaxle to a suitable work surface. Be careful not to over tighten the
C-
clamp when securing the transaxle.
15
To disassemble the axle housing assembly, carefully position the axle housing assembly on a clean flat surface, then separate axle
housing from the planetary assemblies as
shown.
Axle Housing Retaining
Axle
Shaft
with One Retaining Ring
Axle
Housing Disassembly
13
With the transaxle secure, use a
3/8
inch
socket or end wrench to remove the flange
screws from one (A-side or B-side) axle housing assembly.
14
After removing the flange screws, carefully
remove the axle housing assembly from the
housing assembly.
Caution:
Retain the planetary assemblies in
the axle housing assembly during removal.
4
16
Position the axle housing assembly with
the output end of the axle shaft in the up
position. Using a
No.
5
or 7 internal retaining
ring pliers, remove the ball bearing retaining
ring from the axle housing.
17
Re-position the axle housing with the
splined end of the axle in the up position.
Using a
No.
4
or 5 external retaining ring
pliers, remove the retaining ring and thrust
washer from the axle shaft.
18
Remove the axle from the axle housing by
using a small press or by tapping the splined
end of the axle shaft with a plastic head hammer. This will dislodge the seal and bearing
from the axle housing.
19
After separating the axle shaft from the
axle housing, remove the ball bearing, seal
and thrust washer from the axle shaft. The
thrust washer may be in the axle housing.
Note:
The retaining ring remaining on the axle
shaft need not be removed.
Page 6
Ring Gear
Sun
Gear, Second
Ring Gear
Primary Carrier
Planet Gears, First
20
To disassemble the planetary assemblies
for inspection and cleaning, first remove the
ring gear (from the secondary carrier/ planet
gears).
21
Next, putting a slight squeeze on the secondary carrier planet gears, remove the three
secondary planet gears, and carrier.
22
Turn the assembly over and remove the
secondary planet gears for inspection and
cleaning.
23
Remove the sun gear and remaining ring
gear.
24
Again, putting a slight squeeze on the
remaining carrier planet gears, remove planet
gears, and carrier from the backup plate.
25
Shown above are both the primary and
secondary carrier assemblies. The planet
gears may be removed for inspection and
cleaning.
Backup Plate
Sun Gear (First)
26
Next, remove the reaction plate from the
primary sun gear.
27
Remove the primary sun gear from the
motor rotor assembly.
28
Remove the small friction brake pad assembly from its recessed pocket located in the
axle housing.
29
Shown in previous drawing are the three
major parts used in the Eaton transaxle wet
brake assembly, the friction pad assembly,
reaction plate and backup plate. When the
brake is applied, the rotating reaction plate is
squeezed between the stationary friction pad
and the backup plate.
30
Remove the axle housing assembly gas-
ket.
Note:
This gasket may have remained on the
axle housing.
31
Normally any further disassembly of the
brake levers, push rods and etc. is not necessary nor recommended. The brake lever
shims located between the two brake levers is
used to adjust the brake lever movement. This
adjustment was made during the initial
transaxle assembly.
Note:
Standard single handle brake arrange-
ment shown.
Motor Rotor Disassembly
32 Important: Be extremely careful when
removing the motor rotor assembly. The
ball pistons are spring loaded in the bores
and must remain intact because each ball
piston is matched to its respective bore.
The best way to remove the motor rotor assembly is to place a separate motor race on
top of the existing motor race in the housing
assembly. Hold the separate race securely in
position. Then carefully pull the motor rotor
assembly outward until the ball pistons are
fully engaged in the groove located in the
center of the separate race. Carefully remove
the rotor assembly and race together as a set,
handling the motor rotor assembly only.
Note:
If
a separate motor race is not available, work a wide rubber band around the
outside of the motor rotor to hold the ball
pistons in their bores.
33
It is essential that the ball pistons be re-
tained in their bores during handling. This is
Page 7
especially true for the motor rotor(s) as the
motor ball pistons are spring loaded in the
bores.
Note:
assembly,
The remaining transaxle axle housing
if
applicable, can be serviced at this
time (ref. steps 12-34)
Control Shaft Seal
\
\
Gasket
34
Reposition the housing assembly. Using a
Retaining Ring
Input Shaft
(S/A)
3/8 inch socket or end wrench, remove the
self tap screws from the cover assembly.
Note: One self tap screw is located in the
case drain port.
35
With all self tap screws removed (1 3),
carefully separate and remove the cover from
the housing assembly.
36
Turn the cover assembly over and remove
the two buttons.
Note:
These two buttons may have dropped
out into the housing assembly during removal
of the cover.
37
Turn the cover assembly back over and
using a
No.
5
or 7 internal retaining ring pliers,
remove the input shaft retaining ring.
38
Reposition and support the cover allowing
room for shaft removal. With the input shaft in
the down position, use a plastic head hammer
or press to remove the input shaft assembly
from the cover.
39
No
further disassembly of the shaft and
bearing assembly is required as they are
serviced as an assembly.
40
Using a screwdriver or similar tool, drive
the input shaft seal from the cover.
41
To remove the control shaft seal, reposition
the cover. Using a small screwdriver or similar
6
tool, pry the control shaft seal from the cover.
42
Remove the cover gasket from the hous-
ing.
Note:
The gasket may have remained on the
cover.
43
Remove the drive from the pump rotor
assembly.
Drive
Pump Rotor/Ball
(S/A)
Control Shaft and Band Retainer
Insert
with Rubber
Transaxle with Charge Pump
Remove the charge pressure relief
44
valve spring from the housing.
45
Using a pencil magnet or similar tool,
remove the charge pressure relief ball
from its seat in the housing.
46
Remove the control shaft and insert from
the housing and cam ring assembly.
47
Remove the cam ring insert from the con-
trol shaft.
48
Remove the cam ring assembly from the
housing.
49
Carefully remove the pump rotor assembly
from the housing, making sure the ball pistons
are not dislodged from their bores.
Important: It is essential that the pump
rotor assembly remain intact during handling as each ball piston is matched to its
respective bore.
50
Install a wide rubber band around the
pump rotor to retain the ball pistons in their
bores.
Page 8
Motor Rotor/Ball
(SA)
Pump Rotor/Ball
(SA)
Pump and Motor Rotor Inspection
Disassemble and Inspect the rotor assem-
51
bly
in the following manner. Remove the
piston balls from the rotor, one at a time,
working clockwise from the letter stamped in
the rotor face. Place the piston balls in a
prepared container (use a container such as
an egg carton or ice cube tray to hold the
balls).
Note:
The balls must be replaced in the same
bores from which they were removed because
they are all select fit.
Check for broken or collapsed springs in the
motor rotor. When broken or collapsed springs
are found with no other irregularities, the
springs may be replaced individually without
replacing the complete motor rotor assembly.
Inspect the piston balls. They must be smooth
and completely free of any irregularities.
Inspect the rotor bores, rotor bushing and
pintle journals for irregularities or excessive
clearance. The ball piston to rotor bore clearance is select fit electronically from
[,005
mm] to
.0006
inch
[,015
.0002
mm]. When
inch
irregularities are noted, replace the complete
rotor assembly. Install the ball pistons in their
matching bores. Hold them in place with a
rubber band or separate race.
Socket Head Cap Screw
Charge Pump Plate
(4)
use a
5/32
hex key to remove the cap
screws from the charge pump plate.
53
Remove the charge pump plate from
the housing.
54
Remove the charge pump gerotor
from the housing.
55
The pump and motor journals and cam ring
dowel cannot be removed once they have
been installed in the housing.
Note:
any irregularities.
Inspect the pump and motor journals for
If
any are found, the housing
must be replaced.
56
In most cases, we do not recommend
removal of the dampening pistons for inspection or cleaning. Normal flushing should be all
that is required for cleaning.
Dump
Valve
Fitting
Nut
and
O-ring
Transaxle with Dump Valve
57
To remove the dump valve assembly,
first use a 1 inch socket or end wrench to
remove the dump valve nut from the
housing.
58
Remove the O-ring from the dump
valve nut.
59
After removing the dump valve nut,
remove the dump valve bracket and
spring from the housing by sliding them
over and lifting upward.
60
Remove the spring from the dump
valve bracket.
61
Remove the O-ring from the dump
valve bracket.
Transaxle with Charge Pump
52
To inspect the charge pump assembly,
62
We do not recommend removal of the
check valve assemblies
for
inspection or
cleaning. Once again, normal flushing should
be all that is required to clean the check
valves.
a
Page 9
Transaxle Reassembly
63
Before reassembling the transaxle, clean
all parts and assemblies with clean solvent
and blow them dry with compressed air. Inspect and replace
all
scratched or damaged
parts. Replace all gaskets, seals and seal
rings. Lubricate all seals with petroleum jelly
(Vaseline) for retention during assembly.
Freely lubricate all bearings and finished part
surfaces with clean hydraulic fluid to provide
lubrication at start-up.
Dump Valve
Fitting Nut
and O-ring
Socket Head Cap Screw
Charge
(4)
Transaxle with Dump Valve
64
To reassemble the dump valve, first
lubricate and install the O-ring in the groove
located in the dump valve bracket.
65
Install the spring on the dump valve
bracket. It should be installed with the right
angle bend of the spring pointing inward,
as shown here.
66
Install the spring and dump valve
bracket in the housing.
67
The spring is properly positioned when
the longest leg points toward the check
valve assembly.
68
Lubricate and install the O-ring around
the dump valve nut.
69
Install the nut over the dump valve
bracket, into the housing.
Note:
Make sure you do not damage the
dump valve O-ring during installation.
70
Using a 1 inch socket or end wrench,
torque the dump valve nut to
150
Ib-in
[I7
Nm].
\
Designed Input Gerotor
Rotation Stamped Ring and Star Rotation Stamped
into Housing-CW into Housing-CCW
Designed Input
Transaxle with Charge Pump
Install the gerotor on the housing.
71
Note:
The gerotor ring and star have been
marked with a dot on each, the ring and
star can be placed with these marks up or
down but both marks should be on the
same side.
72
For easier assembly, rotate the
gerotor outer ring to fully engage with the
inner star. The fully engaged side of the
gerotor should point towards the designed
input rotation (CW or CCW as noted on
the housing).
Note:
The designed input rotation is
stamped on the back side of the housing
and also next to the gerotor on the inside.
73
Freely lubricate the gerotor with clean
hydraulic fluid to provide lubrication at
start-up.
74
The charge pump plate has a small
arrow cast into the outer face of the plate.
Page 10
At assembly, this arrow must face toward
the input rotation designated in the hous-
ing.
Note:
High pressure charge pumpgerotor and plate is a matched set and is
not sold separately. Class gerotor and
plate are not a matched set.
75
Aligning the rotation arrow with the
input rotation, install the pump plate over
the gerotor.
76
Install the four cap screws in the pump
plate finger tight.
77
The bottom side of the pump rotor
assembly incorporates five drive pins. At
assembly, these pins must be engaged
with the inner star of the charge pump
gerotor.
78
Lubricate and install the pump rotor
assembly on the pump journal, engaging
the drive pins with the inner star of the
gerotor.
79
Rotate the pump rotor assembly
several times to center the pump plate on
the gerotor.
While continuing to rotate the pump rotor
assembly, alternately tighten the charge
pump plate cap screws to
49
Ib-in
[6
Nm].
80
Remove the rubber band from the pump
rotor assembly. Install the cam ring assembly
in the housing with the flush side of the cam
ring facing outward.
81
Install the cam ring insert on the control
shaft pivot dowel.
82
Install the control shaft assembly, first
aligning the cam ring insert with the cam ring
assembly and then with the housing.
Transaxle with Charge Pump
Drop the charge pressure relief valve
83
ball in its bore.
84
Install the charge pressure relief valve
spring in its bore.
85
Install the drive in the pump rotor assem-
bly.
86
Install the cover gasket on the housing
assembly.
Control Shaft Seal Retaining Ring
\
Input Shaft
(S/A)
Drive
(S/A)
Control Shaft and Insert Band Retainer
Transaxle
with
Charge
Spring
Ball
with Rubber
A
Button
(2)
Cover Reassembly
Lubricate and install the control shaft oil
87
seal with the seal
lip
pointing inward. Press or
drive the seal into the seal counterbore.
88
Lubricate and install the input shaft seal
with the seal lip pointing inward. Press or drive
the seal into the counterbore.
89
Press or drive the input shaft assembly into
the cover.
90
Install the input shaft assembly retaining
ring, making sure it is firmly seated in the
retaining ring groove.
91
To help retain the buttons during assembly,
apply a small amount of petroleum jelly to
them. Install the buttons in the holes located
in the cover assembly.
9
Page 11
Self Tap
Screw
92
Install the cover assembly
by
carefully
aligning it with the control shaft, cam ring pivot
dowel and pump rotor drive.
Transaxle with Charge Pump
Caution:
During installation of the cover
assembly, be careful not to dislodge the
charge pressure relief valve from its bore.
Note:
Two axle housing flange screws may be
used to help retain the cover, gasket and
housing
93
in
position during assembly.
After engaging the control shaft and pivot
dowel in the cover assembly, carefully rotate
the input shaft to engage the pump rotor drive.
When all mating parts are aligned and engaged, the cover assembly should fall into
position on the housing assembly.
Torque
Twice in
Sequence
125
Ib-in
[I4
Nm]
94
With the cover assembly in the proper
position, remove the two alignment flange
screws (if used) and install the self tap screws
(13), and alternately tighten to 125 Ib-in
[14
Nm]. Torque each screw a second time to
compensate for gasket compression set.
Axle Housing Retaining
Thrust Washer
Axle Shaft with One Retalnlng Ring
Radial Lip Seal
Bearing, Ball
Axle Housing Reassembly (one axle hous-
ing or two, use the same procedure for
each).
95
Lubricate and install the thrust washer in
the axle housing.
96
Lubricate and install the axle shaft into the
axle housing.
97
Reposition the axle housing with the
output end of axle pointing downward. Install
the inner thrust washer and axle shaft retain-
ing ring.
Important:
The round-cornered side or die-
rolled side of the retaining ring must point
toward the axle housing.
98
Reposition the axle housing with the output
end pointing upward. Protecting the lip of the
axle seal from the retaining ring groove and
keyway, lubricate and install the seal with the
lip
pointing inward towards the axle housing.
99
Using a piece of pipe or hydraulic tubing
(1.5 inch [38mm]
O.D.
x 6 inch [150mm] long),
press the seal into the counterbore.
100
Again, using a piece of pipe or hydraulic
tubing (1.125 inch [29mm] O.D.
x 6 inch
[150mm] long), press the ball bearing over the
axle shaft and into the axle housing.
101
Using a pair of
No.
5
or 7 internal retaining ring pliers, install the ball bearing retaining
ring in the axle housing.
102
Lubricate and assemble the three planetary gears on the secondary carrier assembly.
10
Page 12
Gasket
Reaction Plate-
When they are all in alignment, the ring gear
will fall into place.
n
Motor Rotor Motor Rotor
16:l Ratio
18T Sun Gear, First
23:l
15T Sun Gear, First
Ratio
Friction Material Must Be
Toward Backup Plate
Planet Gears
Toward Axle Shaft
Carrier(First)-
Planet Gears
I
18T Sun Gear, Second
Output Shaft
107
Shown here are the first and second sun
gears for
108
secondary Planetary assembly.
109
16:l
and
23:l
Install the sun gear (second) into the
Lubricate and assemble the three plan-
15T Sun Gear, Second
Output Shaft
Gear ratios.
etary gears on the primary carrier assembly.
110
Aligning the splines, install the primary
/-
carrier assembly on the sun gear (second).
111
Install the next ring gear into the axle
housing. Install by again aligning the ears on
the outside
of
the ring gear with the notches in
the housing assembly.
Note:
Rotate the primary carrier assembly and
the ring gear will fall into position.
112
Install the primary sun gear (first) into the
primary planetary assembly.
113
Lubricate and install the backup plate in
Axle Shaft
103
Aligning the splines, install the secondary
carrier assembly on the splined end of the
axle shaft located in the housing assembly.
104
Please note that one side of each ring
gear has a bevel on one side. This bevel side
of the ring gear must be toward the output end
of the axle shaft.
105
Install one of the two ring gears into the
axle housing. Install by aligning the ears on
the outside of the ring gear with the notches in
the housing assembly.
106
Rotate the secondary carrier assembly
the axle housing assembly. Install by aligning
the ears with the notches in the axle housing.
114
Aligning the splines, install the reaction
plate on the primary sun gear
(friction
material must be toward backup plate).
115
Aligning the screw holes and notches,
install the axle housing gasket on the axle
housing assembly.
116
Reposition and clamp the housing as-
sembly to the bench as in step
12.
Install the
motor rotor assembly.
117
Install the friction brake pad into its re-
cess located in the housing assembly.
118
Carefully retain the planetary assemblies
in position, install the axle housing assembly
planet gears to align with the ring gear teeth.
11
Page 13
on the housing assembly.
119
Install the axle housing flange screws and
torque to 125 Ib-in [14Nm].
Transaxle with Charge Pump and Spin-
on
Filter
Lubricate the filter seal, install filter,
124
hand tight
(3/4
to 1 full turn after gasket/
base contact).
125
Fill transaxle with an approved hydraulic
fluid ( 781 Series-both halves must be filled
separately). The transaxle is now ready for
test and installation.
I
Motor RotorlBall
(S/A)
with Rubber
Ball Retainer
Band
Remove Rubber Band Ball Retainer
just before ball pistons enter race groove
120
Reposition the transaxle and install the
gasket and (one of the following)
filter base.
internal filter and valve cover (position metal
side of filter toward housing and gasket).
...port
121
plate.
Aligning the screw holes, install 5 flange
screws.
122
Cross torque screws to 125 Ib-in [14mm].
781 Series Transaxle
After servicing both transaxle halves,
123
the two halves, center push rod, conical
springs (2), bolts, washers and nuts (4
each ) can be installed. Torque the bolt
and nut to 16±1.6 Ib-ft [22±2 Nm]. Replace E-ring retaining the conical spring
at each end of center push rod.
Fluid Recommendations
Premium hydraulic oil having a viscosity
equivalent to SAE 2Ow-20, SAE
30
or SAE
40.
The fluid should be chemically stable, incor-
porating rust and oxidation inhibitors.
A reputable supplier can help you make the
best selection of hydraulic fluid for use in your
Eaton transaxle.
Note:
If the natural color of the fluid has
become black or milky, it is possible that an
overheating or water contamination problem
exists.
Transaxle Parts Lists
Hydrostatic Transaxle Series 751
Hydrostatic Transaxle Series 851 No. 6-426
Hydrostatic Transaxle Series 771-A
Hydrostatic Transaxle Series 771-B
Hydrostatic Transaxle Series 781 No. 6-429
No.
No.
No.
6-425
6-427
6-428
Page 14
Fault-Logic
Trouble Shooting
This Fault Logic Troubleshooting Guide is designed as a
diagnostic aid in locating possible transaxle problems by
the user.
To use this Fault-Logic Troubleshooting Guide, simply
match the transaxle symptoms with the problem statements and follow the action steps shown in the box
diagrams. This will give the user unnecessary machine
down time.
Following the Fault-Logic diagrams are diagram action
comments to further help explain the action steps shown
in the diagrams.
Where applicable, the comment number of the state-
ments appear in the action block of the diagrams.
System Jerky when Starting
Input Drive Control Linkage
Defective Defective Defective Ok
Repair Repair
Transaxle Linkage
Repair
Replace
Brake/Drive Interlock
(
if
used
Defective
Repair
)
Page 15
System Operating Hot
Oil Level
or Expansion Tank
in
Reservoir Cooling Ok
LOW Defe'ctive
Fill to
Proper
Level
Transaxle Ok Brake/Drive Linkage
Repair
Defective Defective
Repair
Replace
Inspect
Transaxle
Cooling Fins
Plugged
I
Clean
Dump Valve
(
if used
Defective
Repair
(
if Interlock used
Repair
)
)
OK
System will not Hold or Free Wheels on Incline
Dump Valve Brake/Drive Interlock
(
if used
Defective Defective Defective Ok
Replace Replace Replace
)
Linkage
(
if used
)
Repair or
Replace
Transaxle Hubs
Transaxle
Input Drive
Inspect
Wheel
Defective
Repair
14
Page 16
Loss
of
Power or System
(Will not operate in either direction)
Oil Level in Reservoir
Check
or Expansion Tank
Fill to
Proper
Level
Transaxle
Ok
inspect Wheel Ok
Defe'ctive Defective
Repair
Brake/Drive Interlock External Linkage Inspect Control
Defective Defective Defective
Repair
Replace
Repair
Repair
Ok
Dump Valve
(
if
used
Defective
Repair
Repair
)
Ok
n
Diagram Action Step Comments
1
Check oil Level in Reservoir or Expansion Tank
for:
A
Consult own/operators manual for the proper
type fluid and level dealer for warranty consideration
2
Inspect Filter for:
A
Plugged or clogged filter element (see
Transaxle Repair Information for filter location)
3
Inspect External Control Linkage
A
Misadjusted or disconnected
B Worn, binding, bent or broken
4
Inspect Transaxle Cooling Fan for:
A
Sheared or missing drive screws
B Broken or missing fan blades
5
Inspect Transaxle Cooling Fins for:
A
Plugged
6
Inspect Transaxle Input Drive
A
Drive belt worn, loose or broken
B Drive pulley key sheared or missing
7
Inspect Dump Valve for:
A
Misadjusted or disconnected
B Drive pulley key sheared or missing
or
clogged cover cooling fins
for:
for:
10
Repair or Replace Transaxle
A
When Transaxle
B
All
non warranty repairs should be preformed
by trained personnel
is
under warranty return
to
8
Inspect Brake/Drive Interlock Linkage for:
A
Misadjusted
B Worn, binding, bent or broken
9
Inspect Wheel Hubs for:
A
Drive key worn, sheared or missing
or
disconnected
Page 17
Eaton Corporation
Eaton G.m.b.H.
Hydraulics Division
Hydraulics Division
15151 Highway 5, Eden Prairie,
100
410 D-5620 Velbert 1 West Germany 49-2051-2070
Printed
in
U.S.A.
MN
55344 Telephone
(612)
937-9800
FORM
October,
NO.
7-416
1991
Loading...