B25W-202010
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CHAPTER 4 HST SYSTEM1025H TRACTOR
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6.4 HANDLING PRECAUTIONS
6.4.1 STORAGE 6.4.4 SHAFT COUPLING
6.4.5 DEFECT OF LEVER SHAFT
CAUTION
• In case of keeping it over one month, a
clean hydraulic oil (operating oil) has to be
injected to the inner case of HST to prevent
any possible corrosion of HST inside, and it
has to be kept in a dry and clean place.
WARNING
1. A special carefulness will be taken when
taking out HST Input/Output Shaft and Driv-
ing M/C Shaft/CoShaftre. The stagger (de-
2. When attaching/detaching HST to Main
Body, an excessive load shall not be given
to the end of Output/Input.
WARNING
1. If lever Shaft of HST has an excessive torque
-
ly to be broken. So, Stopper shall be operat-
ed less than its maximum inclination angle
that HST allows, and a special care is taken
not to apply an excessive torque, beyond its
2. A special care is needed not to have rain or
water drops fall towards the lever Shaft or
Oil Seal; otherwise, lever Shaft gets rusted
and oil leakage may happen.
6.4.2 OPERATING OIL (HYDRAULIC OIL)
WARNING
• Oil for operating a hydraulic system affects
the performance and service of machinery
as to what to choose and handle the oil. In
general, an operating oil has to be a quality
hydraulic oil and it has to be excellent in its
lubrication, oil resistance, oxidative stability,
and anti-corrosion. And it has to have proper-
ties not to give damage to packing and seal.
For this HST, an operating oil of ISO VG46 is
highly recommended. In case of mixing with
other kind of oil, it has to use a new oil.
6.4.3 POLLUTION MANAGEMENT
WARNING
• HST is to be delivered in a fully washed
condition to protect the Main Body of HST. In
case of feeding the hydraulic oil (operating oil)
into a tank or while using it, you make sure to
take a special care not to have any pollution
molecules come into the HST. The pollution
level of hydraulic oil has to be maintained
within NAS9 Level. Pollution molecules of over
severe damage to the HST for a short time.
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