B22W-202010
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CHAPTER 4 HST SYSTEM 1022H TRACTOR
CAUTION
•
long drive. It can lead to damage of HST, deterioration of hydraulic oil, and malfunction of it.
• To prevent these conditions, it is requisite to perform a regular inspection on hydraulic oil and
oil in a quantitative way, but there is an effective method of judging the state by naked eyes. You
should refer to the following visual inspection.
•
the earlier of once a year (after starting to use it that year) or 200Hrs.
• When replacing with a new hydraulic oil, there is mixture of deteriorated oil, sludge, and water,
etc in the tank, which may result in poor performance of HST and shorten its service life. So, it is
※
Visual Inspection & Judgment (Take the sample of oil from HST Case, put it in a test tube, and
compare it with a new hydraulic oil)
Appearance Smell Condition Action
Transparent, and no discoloration
Normal
(Good)
Good Usable
Transparent, and small black spots
Normal
(Good)
Foreign materials are
contained.
Filter out the foreign
materials, and use it.
It is discoloring into milk-white color
Normal
(Good)
Moisture (water) is
contained
Replace with a new oil
It has been discolored into black. Stink Oxidized and aged Replace with a new oil
6.5 REGULAR CHECK & REPLACEMENT CYCLE OF HYDRAULIC OIL
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