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Product Safety Information
WARNING
Failure to observe the following warnings, and to avoid these potentially hazardous situations, could result in death or serious injury.
Read and understand this and all other supplied manuals before installing, operating, repairing, maintaining, changing accessories on, or
working near this product.
Always wear eye protection when operating or performing maintenance on this tool. The grade of protection required should be assessed
for each use and may include impact-resistant glasses with side shields, goggles, or a full face shield over those glasses.
Always turn off the air supply, bleed the air pressure and disconnect the air supply hose when not in use, before installing, removing or
adjusting any accessory on this tool, or before performing any maintenance on this tool or any accessory.
Do not use this tool if the actual free speed exceeds the rated rpm. Check the free speed of this tool before mounting any accessories, after all
tool repairs, before each job and after every 8 hours of use. Check speed with a calibrated tachometer, without the abrasive product installed.
Note: When reading the instructions, refer to exploded diagrams in Parts Information Manuals when applicable (see under Related
Documentation for form numbers).
Lubrication
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•
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Each time the Series 61H Grinder is disassembled for maintenance,
repair or replacement of parts, lubricate the tool as follows:
1. Apply a coating of Ingersoll Rand No. 68 Grease to the inner
surface of the Arbor Coupling (39).
2. Fill the oil reservoir in the handle with Ingersoll Rand No. 50 Oil.
Inject approximately 2.5 cc of oil into the air inlet before attaching the
air hose. Remove the Oil Chamber Plug (3) and fill the oil chamber.
3. When installing a new Seal Cup Assembly (28, 38, or 42) or a
new Dust Washer (45), impregnate the new seal or washer with
Ingersoll Rand No. 50 Oil before installation.
Disassembly
General Instructions
1. Do not disassemble the tool any further than necessary to replace
or repair damaged parts.
2. Whenever grasping a tool or part in a vise, always use leather-
covered or copper-covered vise jaws to protect the surface of
the part and help prevent distortion. This is particularly true of
threaded members and housings.
3. Do not remove any part which is a press fit in or on a
subassembly unless the removal of that part is necessary for
repairs or replacement.
4. Do not disassemble the tool unless you have a complete set of
new gaskets and O-rings for replacement.
Disassembly of the Tool
1. Clamp the handle of the Grinder horizontally in leather-covered
or copper-covered vise jaws.
2. For Models 61H120H63, 61H120H64 and 61H150H63,
proceed as follows:
Insert a sprag pin into one of the radial holes in the Inner
Wheel Flange (48) and using a wrench, remove the Wheel
Flange Nut (52).
Remove the Outer Wheel Flange (51) and the grinding wheel.
Using snap ring pliers, remove the Inner Wheel Flange
Retainer (50) and slide the Inner Wheel Flange off the
Arbor (41) being careful not to lose the Inner Wheel Flange
Key (49).
For Models 61H120G4 and 61H150G4, using a wrench on the
flats of the Collet Body (54) and the flats on the Collet Nut (56),
unscrew the Collet Nut and remove the Collet (55).
For Models 61H120L6 and 61H150L6, unscrew and remove the
cone wheel.
NOTICE
The Wheel End Bearing Cap (46) has left–hand threads.
3. For Models 61H120H63, 61H120H64 and 61H150H63, using a
wrench on the hub of the Wheel Guard, unscrew and remove the
Wheel Guard and Bearing Clamp Washer (44).
NOTICE
The Wheel Guard (47) has left–hand threads.
For all other models, using a wrench, unscrew and remove the
Wheel End Bearing Cap and Bearing Clamp Washer (44).
4. Grasping the Arbor (41), Collet Body (54) or Cone Wheel
Adapter (53), pull the assembled Arbor from the Arbor
Housing (33).
a.
b.
c.
5. For Models 61H120G4 and 61H150G4, using one wrench on
the flats of the Collet Body and another on the flats of the Arbor,
unscrew and remove the Collet Body.
For Models 61H120L6 and 61H150L6, using one wrench on the
flats of the Cone Wheel Adapter and another on the flats of the
Arbor, unscrew and remove the Cone Wheel Adapter.
6. If the Dust Washer (45) must be replaced, use a pointed probe
to pick the Washer out of the Wheel End Bearing Cap or Wheel
Guard.
7. Slide the Wheel End Bearing (43) off the Arbor and pull the Seal
Cup Assembly (42) off the Arbor if it needs replacement.
8. Using a wrench on the flats of the Arbor and another on the
flats of the Bearing Nut Assembly (31), unscrew and remove the
Bearing Nut Assembly.
9. If the Seal Cup Assembly (38) requires replacement, pull it off the
Bearing Nut Assembly.
10. Slide the Rear Arbor Bearing (40) off the Arbor.
11. If the Arbor Coupling (39) remained in the Arbor Housing when
the Arbor was removed, strike the castellated end of the Housing
against a block of wood to free the Coupling.
12. Using a thin blade screwdriver, spiral the Deflector Retaining
Ring (37) out of the annular groove on the Arbor Housing.
13. Slide the Exhaust Deflector (34), Front Deflector Seal (36) and Rear
Deflector Seal (35) off the castellated end of the Arbor Housing.
Disassembly of the Motor
1. Using a 5/64” hex wrench, unscrew and remove the two Rear End
Plate Retaining Screws (12).
2. Using a wrench on the flats of the Arbor Housing and another
on the flats of the Throttle Handle Assembly (1), unscrew and
remove the Arbor Housing. Pull the assembled motor out of the
Arbor Housing. Remove the two Motor Clamp Washers (30) from
the front of the motor or from the inside of the Arbor Housing.
3. Clamp the Bearing Nut Assembly (31) at the front of the motor in
leather-covered or copper-covered vise jaws with the Controller
Assembly (17) upward.
4. Using the Controller Wrench (57) on the flats of the Controller
Assembly, unscrew and remove the Controller Assembly.
5. Lift the Rear Rotor Bearing Washer (20), Rear End Plate
Assembly (18) and Cylinder Assembly (21) off the Rotor (23).
6. Remove the Vanes (24) from the Rotor.
7. Remove the Rotor from the vise. Using leather-covered or copper-
covered vise jaws, carefully grasp the vane portion of the Rotor in
the vise with the Front Rotor Bearing (29) upward.
8. Using a wrench, unscrew and remove the Bearing Nut Assembly
from the Rotor.
Summary of Contents for 61H Series
Page 7: ...Notes...
