Satisfactory operation of any piece of mechanical
equipment depends, to a large degree, upon adherence to a
preventive maintenance schedule.
To obtain optimum performance at minimum cost,
observe the "Maintenance" guide on page 15.
FRAME OIL CHANGE
Oil changes should be made every 500 hours of operation or
every 90 days, whichever occurs first. If XL-T30 lubricating oil
is used, oil change may be extended to 1500 hours or 12
months. Important: For maximum removal of impurities, drain
only when frame oil is hot. After the operator has observed the
condition of the oil from a number of changes, the length of
time between changes may be extended if so warranted.
Frame oil capacity for Model 7100 is 2½h quarts (2.37 liters),
and the Model 3000 is 41/2 quarts (4.25 liters).
LUBRICATING OIL RECOMMENDATIONS
Ingersoll-Rand recommends the use of XL-T30
lubricating oil after a 200 hour break-in on petroleum based oil.
The petroleum lubricating oil should be a non-detergent,
containing only rust, oxidation, and anti-foaming inhibitors with
either a naphthenic or paraffinic base.
The viscosity should be selected for the temperature
immediately surrounding the unit when it is in operation.
OIL VISCOSITY TABLE
Viscosity at 100F
40F & Below (4.4C & Below)
40F to 800F (4.4C to 26.7C)
80F to 125F (26.7 to 51.7C)
The viscosities given In the table are intended as a
general guide only Heavy-duty operating conditions require
encountered the viscosity index of the oil should be
considered. Always refer your specific operating conditions to
your industrial lubricant supplier for recommendations.
MOTOR LUBRICATION & CARE
Depending upon the type of electric motor driving
your unit, the following lubricating
BALL BEARING MOTORS WITH GREASE FITTINGS
Ball bearing motors that have grease fittings and
plugs near the bearings are to be repacked with grease once
a year. Use a very good grade of ball bearing grease.
BALL BEARING MOTORS PRELUBRICATED FOR LIFE
These motors have no grease fitting or plugs near
the bearing and do not require lubrication.
Several major points contributing to proper motor
operation and care are given in the following paragraphs.
more detailed instructions, refer to the manufacturers' specific
It is also a good practice to monthly blow off the
motor windings with a jet of air to prevent an accumulation of
dirt. An occasional revarnishing of the windings will greatly
prolong the life of the motor.
If the motor is located in an atmosphere where it is
exposed to appreciable quantities of water, oil, dirt or fumes, it
must be specially constructed.
AIR INLET FILTER/SILENCER
It is very important that the air inlet filter/silencer be
kept clean at all times. A dirty inlet filter reduces the capacity
of the compressor.
The filtering element should be taken out at least
once a month and cleaned by vacuuming or washing in mild
detergent and water. Allow to dry and then reinstall.
Figure 4-1.Air inlet Filter/ Silencer
Check the oil level in the
bare compressor before each
use by removing the oil filler plug
and wiping clean. Place the oil
gauge with the writing up into the
filler hole until the threads touch
THREADS.) Remove the gauge
and read the oil level. II oil level
drops below the safe point, add
oil to bring level back to the FULL
mark. Do not over fill. Replace
oil plug HAND TIGHTEN ONLY.
Flushing compressor frame with gasoline,
kerosene or flammable fluid can cause
severe injury or death.
Use a regular flushing oil to flush out