54
EATON
Heavy-Duty Series 2 Hydrostatic Pumps Parts and Repair E-PUPI-TS004-E October 2004
Additional Notes:
• Fluids too thick to flow in cold weather start-ups
will cause pump cavitation and possible
damage. Motor cavitation is not a problem
during cold start-ups. Thick oil can cause high
case pressures which in turn cause shaft seal
problems.
• If the color of the fluid has become black, it is
possible an overheating problem exists.
• If the fluid becomes milky, water contamination
may be a problem.
• Take fluid level reading when the system is
cold.
• Contact your Eaton representative if you have
specific questions about the fluid requirements.
ISO
OPTIMUM
CLEANLINESS
MINIMUM
RANGE
MAXIMUM
REQUIREMENTS
10cSt
16 - 39 cSt
2158 cSt
18/13
[60 SUS]
[80 - 180 SUS]
[10,000 SUS]
Hydraulic Fluid
Recommendations
Viscosity/Cleanliness
Guidelines
Additional Notes:
• Viscosity and ISO cleanliness requirements
must be maintained as outlined.
• Based on limited product testing to date, no
reduction in unit life is expected when operating
at the pressure ratings indicated above.
• Vegetable oil is miscible with mineral oil.
However, only the vegetable oil content is
biodegradable. Systems being converted from
mineral oil to vegetable oil should be repeatedly
flushed with vegetable oil to ensure 100%
biodegradability.
• Specific vegetable oil products may provide
normal unit life when operating at pressure
ratings higher than those indicated above.
RATING WITH BIODEGRADABLE OIL
COMMENTS
80% of normal pressure rating
82° C (180° F) max fluid temp (unit)
listed for mineral oils.
71° C (160° F) max fluid temp (reservoir)
Biodegradable Oil
(Vegetable) Guidelines
