Mahindra 35 Series, Service Manual, Page: 302 / 368

H-6 35 Series 4WD, Model - 3535, 4035, 4535 and 5035 SM June’08
The life of every hydraulic system is directly related
to system cleanliness. Typically, the cleaner a system
is, the longer it will last. Particle or chemical
contamination, therefore, is the enemy of any
hydraulic system and extra effort should be taken
to avoid contamination whenever and wherever
possible. The following is a list of good practices
to reduce or eliminate potential contamination
while storing, handling, assembling and using
hydraulic system components.
Ports & Fittings
• Port plugs should remain in components and
hoses until ready to use.
• Use care in removing port plugs so that plastic
does not shear off in threads.
• Use caution to ensure excess paint near the port
face does not chip off or fall into the unit.
• The area around the port face is a sealing
surface and should be protected from dents or
contamination.
• Fittings being screwed into the port should be
kept clean and lubricated.
Assembly & Storage
• Hose and tube assemblies should be flushed
and capped until used.
• Never use shop air to blow out a tube, hose or
reservoir as the air supply may not be “clean”
air.
• Filler caps should be kept clean.
• Hydraulic assembly areas should be free of
airborne contaminants.
• If components are stored in a cold environment,
be sure to remove any condensation that may
occur as the components warm up.
• If storage is prolonged, components may need
to be rust proofed.
Fluids
• Hydraulic fluid should be filtered to ISO 18/13
or better for initial fill.
• Water and hydraulic fluid do not mix; water is
considered a foreign chemical contaminant.
• Any surface in contact with hydraulic fluid must
be clean and dry.
Recommended Practices for
Handling and Storage of Hydraulic Components
• Random sampling should be taken from
hydraulic systems on vehicles ready to ship to
ensure cleanliness level meets ISO 18/13 or
better.
Exposed Surfaces
• Exposed cylinder rods should be handled with
care to avoid scratches and dents.
• Motor and pump shafts should be kept clean
and free of physical damage. Splines should be
coated with anti-seize compound or grease
before assembly.
Tapered shafts should also be protected from
physical damage to the shaft and coupling ID.
Returns
If there is a suspected problem with a new start-
up component, remove the component and protect
it for later analysis. In the event a component must
be returned to Eaton or Mahindra dealer do NOT
disassemble the unit and use only lint-free rags to
wipe components.
NOTE: Units returned to Eaton require a returned
goods authorization assigned BEFORE
shipping.
SINCE SOLVENTS ARE
FLAMMABLE BE EXTREMELY CAREFUL WHEN USING
THEM EVEN A SMALL EXPLOSION OR FIRE COULD
CAUSE OR INJURY.
Eye protection should be worn.
ADDITIONAL NOTES :
1) Fluid too thick to flow in cold weather start-
up will cause pump cavitation and possible
damage motor cavitation is not a problem
during cold start-ups. Thick oil can cause high
case pressure which in turn can blow pump
shaft seals.
2) If the natural colour of the fluid has become
black it is possible that an overheating problem
exists.
3) If the fluid become milky, water contamination
may be a problem.
4) Take fluid level reading when system is cold.
5) Contact your dealer-representative if you have
specific questions.
Steering