Service Manual

EATON
HYDROSTATIC TRANSMISSION
MODEL
6/ 7
REPAIR MANUAL
NO.
7-403
Hydrostatic Fluid Recommendations
A reputable supplier can help you make the best selection of
hydraulic fluid for use in Eaton hydrostatic products.
For satisfactory operation, the following recommendations
1. The filter system used in the hydraulic circuit should be
apply:
capable of cleaning and maintaining the hydraulic fluid
to
meet ISO Cleanliness Code 18/13 per SAE J1165. This code
allows a maximum of 2500 particles per milliliter greater than
5
µm and a maximum of 80 particles per milliliter greater than
15 µm.
2. At normal operating temperatures, optimum viscosity ranges
are from 80-180
SUS (16-39 cSt). Viscosity should never fall
below
60 SUS (10 cSt) and, at the lowest expected start-up
temperature, should not exceed
10,000 SUS (2158 cSt).
3. The fluid should be chemically stable, incorporating rust and
oxidation inhibitors.
Specific types of fluid meeting these requirements are:
Premium hydraulic oil'
Engine crankcase oil-SAE 1 Ow, SAE 2Ow-20, SAE 30
Automatic transmission oil
Hydraulic transmission oil
Synthetic fire resistant fluid-
Quintolubric 822-220,
-300 or -450
Quaker Chemical Co.
Conshohocken, PA 19428
Cosmolubric HF-122, -130, -1 44 or -1 530
E.F. Houghton & Co.
Valley Forge, PA
Milisafe Code 1274 (280 Series) 280-1 50, -300 or -500
Future Trend Industries
Cottage Grove,
MN 55016
Note: If the natural color of the fluid has become black or milky, it
is possible that an overheating or water contaminant problem
.
exists.
For accurate level readings, take readings when the fluid is cold.
*Supplied in Model
6 and 7 Transmissions, Model 750 and 770
Transaxles, and 780 Transaxles without charge pumps that are
shipped from the Spencer factory. The viscosity of this factory
fluid is equivalent to
SAE 2Ow-20. The preferred fluids for all light
duty transmissions, pumps, transaxles and motor axles are those
having a viscosity equivalent to
SAE 2Ow-20, SAE 30 or SAE 40.
Eaton Corporation Hydraulics Division 151 51 Highway 5 Eden Prairie, MN 55344 Telephone [phone]
.
REVISED OCTOBER, 1988
FORM NO. 7-403-108