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Check the oil level at both ends of the blower daily. The oil change period is governed by operating
conditions, such as load, temperature, dirt, humidity, fumes and the quality of oil used. Under severe
operating conditions the oil should be changed every 1000 hours or more often. Under ideal operating
conditions oil may extend the change interval up to 6000 hours based on a good oil analyzes program.
Good practice is to change the oil often enough that it appears clean and clear when drained from the
sump. Oil sump should be flushed with a clean solvent every forth oil change. Always use clean
containers for oil and cleaning solvents.
MAINTENANCE
AIR FILTERS AND FILTER-SILENCERS
Servicing the air filters is one of the most important maintenance operations to be performed to
ensure long blower life.
Servicing frequency of filter elements is not time predictable. A differential pressure indicator, with a
continuous gauge reading, should be installed across the inlet filter. It will tell how much of the service life
of the filter element has been used. It will also eliminate both premature filter servicing and premature
blower failure due to a plugged filter when the filter pressure drop is used to establish maintenance
points.
In all cases refer to the filter manufacturer’s service instructions. Due to the many types of filters, it is not
practical to give specific instructions covering all models; however, the following paragraphs describe
some of those most commonly used.
NOTICE
No matter what type of filter is used, always make sure all seals, gaskets, clamps and hose
connections on the filter and inlet line are absolutely air tight. Each time the filter is serviced,
inspect interior of the blower for dirt.
TEMPERATURE OIL
USED
-20° F to 0° f
Mixture of 2/3 SAE 10W
and1/3 Diesel Fuel
0° to 30° F
SAE 10W
30° to 50° F
SAE 20
50° to 110° F
SAE 30
110° to 112° F
SAE 50
FIGURE 4-4 – OIL BATH FILTER
