Ingersoll Rand — Test and Inspection Procedure

Testing & diagnosis · Series 99H Grinder

From a Ingersoll Rand service manual — check it applies to your exact model before use.

Procedure

1. Run performance tests at 90 psig (6.2 bar/620 kPa) air pressure at the inlet with an eight foot (2.44 m) length of 3/4 inch (19 mm) diameter air supply hose.
2. Without a wheel, operate the Grinder with the Throttle Lever fully depressed and check the free speed with a hand-held tachometer at the spindle end.
3. Test the Grinder Motor for power to determine minimum performance levels; hold the Lever open until the test is complete.
4. There must be no objectionable leaks in any non-exhaust area; the Throttle must not leak when closed.
5. There must be no leaks past the closed Throttle that will run the motor.
6. The Grinder must start smoothly when the Throttle Lever is depressed and shut off completely when released.
7. The Grinder must be equipped with a spring-loaded window style Lock (17) that returns to the locked position when the Throttle Lever is released.
8. The tool must run smoothly without noticeable vibration or unusual sound.
9. The Arbor (58 or 59) must turn freely with no evidence of brinelled bearings.
10. The threads on the arbor must be free of nicks and damage.
11. The Nameplate must be legible, in place and securely fastened; make replacement if necessary.

Source: Ingersoll Rand service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.

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