Revision B
Revised 5/20/2003 12:33 PM
53
Hydraulic System
10.11 Hydraulic Oil
All hydraulic systems depend on clean oil operating within the specified temperature range.
This hydraulic system requires a minimum of an ISO 18/15 cleanliness level, a maximum
continuous operating temperature of 180 deg F and an intermittent operating temperature of
200 deg F. These temperature readings apply at the hottest point in the transmission, which
are normally the case drains. Blastrac recommends that periodic oil samples are taken from
the case drain hoses and analyzed.
The hydraulic oil will meet the above specifications when delivered from the factory,
however the oil can become contaminated over time if the system is not maintained. Keep in
mind that the most harmful particles are the ones that cannot be seen with the naked eye. It is
extremely important that special care is taken any time the system is exposed to outside
elements i.e. replacing a hose, replacing a filter or changing the hydraulic oil. Blastrac
recommends that a 10-micron filter is used when adding new oil to the hydraulic tank and
special care is taken to insure that no foreign particles enter the system. Please contact a
Blastrac Service Center or the Blastrac Engineering Department if there are any questions
concerning the hydraulic system and its components.
Operating Instructions BMS-270LPII
DANGER: Be sure the oil has cooled down before taking the sample. As
mentioned above, the oil temperature can be in excess of 200 deg F and will cause
severe burns if touched.
