Ingersoll Rand 88S Serie Manual De Operación Y Mantenimiento página 19

Disconnect the sander from the air supply hose or shut
off air to the tool and bleed the air from the line before
proceeding with the Test and Inspection Procedure.
Run the performance tests at 90 psig (6.2 bar/620 kPa) air
pressure at the inlet of the tool with an eight foot length of
3/4" (19 mm) diameter air supply hose.
1. Without a sanding pad on the tool, operate the Sander
with the Throttle Lever fully actuated and check the
free speed by applying a hand–held tachometer to the
spindle end. Record the Sander serial number, date of
test and actual free speed in a permanent file. The
minimum and maximum allowable free speeds are as
follows:
Model Stamped
88S45 4500
88S60 6000
MAINTENANCE SECTION
TEST AND INSPECTION PROCEDURE
Free Speed, rpm
Min. Max.
4300 4550
5650 6050
19
2. Attach the power test adapter to the spindle and test
the 88S45 using a 4F Test Fan and test the 88S60 using
an R3 Fan. The minimum allowable speed for 88S45 is
3 000 rpm; for 88S60, it is 4 700 rpm.
3. There must be no objectionable leaks in any non–
exhaust area. The Throttle must not leak when it is
closed.
4. There must be no leaks past the closed Throttle that
will run the motor.
5. The Sander must start smoothly when the Throttle
Lever is actuated and must shut off completely when
the Throttle Lever is released.
6. The Sander must be equipped with a spring–loaded
window style Lock (15). The Lock must return to the
locked position when the Throttle Lever is released
and must prevent operation of the Throttle.
7. The tool must run smoothly without noticeable
vibration or unusual sound.
8. The Arbor (27) must turn freely with no evidence of
brinnelled bearings.
9. The threads on the Arbor must be free of nicks and
damage.
10. The Nameplate must be legible, in place and securely
fastened. Make replacement if necessary.