Ingersoll Rand 99V Serie Manual De Operación Y Mantenimiento página 24

Disconnect the Grinder from the air supply hose or
shut off air to the tool 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 (2.44 m)
length of 3/4" (19 mm) diameter air supply hose.
1. Without a wheel on the tool, operate the Grinder with
the Throttle Lever fully depressed and check the free
speed by applying a hand–held tachometer to the
spindle end. The minimum and maximum allowable
free speeds are as follows:
Model Stamped
99V45 4500
99V60 6000
99V77 7700
99V85 8500
2. Test the Grinder motor for power to determine these
minimum performance levels. The Throttle Lever must
not be actuated repeatedly during the test. Depress the
Lever and hold it in the open position until the test is com-
plete.
MAINTENANCE SECTION
TEST AND INSPECTION PROCEDURE
Free Speed, rpm
Minimum Maximum
4 300 4 550
5 650 6 050
7 250 7 750
7 950 8 550
Model
ft–lb
99V45 3.80
99V60
3.50
99V77 3.10
99V85 3.10
3. There must be no objectionable leaks in any non–ex-
haust 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 Grinder must start smoothly when the Throttle
Lever is depressed and must shut off completely
when the Throttle Lever is released.
6. The Grinder must be equipped with a spring–loaded
window style Lever Lock (15). The Lever Lock must
return to the locked position when the Throttle Lever
is released.
7. The tool must run smoothly without noticeable vibra-
tion or unusual sound.
8. The Arbor (27) must turn freely with no evidence of
brinelled 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.
24
Torque Speed rpm
Nm
5.15 3 300
4.75
4 400
4.20 5 500
4.20 5 500