Service Manual
1
The following repair information applies to
the Eaton
751,851,771,
and
781
series hydro-
static transaxles.
Date
of
Assembly,
Assembly Date
of
Part Number Input Rotation Build Code
\
(CW or CCW)
and Input Rotation Stamped on
this Surface
Customer
\
Part Number
XXXXXX Factory
(
if
Required
)
11
Rebuild
Code
Original Build Factory Rebuild
example
010191
)
(
example
01/01/91 11
)
01 01 91 01 01 91 11
Year Number
of
Times
Month Day
Rebuilt
(2)
Month
2
The transaxle identification information is
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 rota-
tion and date code.
Transaxles 751,851,771, and 781
5
The following procedures describe com-
plete and disassembly and reassembly of the
transaxle.
The level of cleanliness maintained while
servicing the transaxle could affect its perfor-
2
mance. Work in a clean area. After disassem-
bly, wash all parts with clean solvent and blow
the parts dry with air. Inspect all mating sur-
faces. 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, recom-
mended hydraulic fluid on the finished sur-
faces 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
300
Ib-in
[34
N-m)
5/32
Hex Wrench
Small screwdriver
(4
in
[102
N-m) to
6
in.
[150
N-m) long)
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)
oughly clean the transaxle exterior.
7
Seal all open ports before cleaning. Thor-
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.