Ingersoll-Rand 61H Series Setup guide

16573321
Edition 3
February 2014
Save These Instructions
Air Grinder
Series 61H
Maintenance Information

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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 o 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
•
•
•
•
•
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 ll 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 t 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 o the
Arbor (41) being careful not to lose the Inner Wheel Flange
Key (49).
For Models 61H120G4 and 61H150G4, using a wrench on the
ats of the Collet Body (54) and the ats 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 ats of the Collet Body and another on the ats of the Arbor,
unscrew and remove the Collet Body.
For Models 61H120L6 and 61H150L6, using one wrench on the
ats of the Cone Wheel Adapter and another on the ats 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) o the Arbor and pull the Seal
Cup Assembly (42) o the Arbor if it needs replacement.
8. Using a wrench on the ats of the Arbor and another on the
ats of the Bearing Nut Assembly (31), unscrew and remove the
Bearing Nut Assembly.
9. If the Seal Cup Assembly (38) requires replacement, pull it o the
Bearing Nut Assembly.
10. Slide the Rear Arbor Bearing (40) o 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 Deector Retaining
Ring (37) out of the annular groove on the Arbor Housing.
13. Slide the Exhaust Deector (34), Front Deector Seal (36) and Rear
Deector Seal (35) o 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 ats of the Arbor Housing and another
on the ats 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 ats 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) o 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.

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9. Pull the Front Rotor Bearing (29), Rotor Spacer Assembly (27) and
Front End Plate Assembly (25) o the hub of the Rotor. If the Seal
Cup Assembly (28) must be replaced, pull the Assembly o the
Rotor Spacer.
Disassembly of the Throttle
1. Using one wrench on the Throttle Handle Assembly ats and
another wrench on the Inlet Bushing (4), unscrew the Inlet
Bushing and remove the Air Strainer Screen (5), Throttle Valve
Spring (6) and the Throttle Valve (7) from the handle.
2. If the Throttle Valve Seat (8) must be removed, insert a hooked
rod through the central opening in the Seat and, catching the
underside of the Seat, pull the Seat from the handle.
CAUTION
The Throttle Lever Pin must be pressed from the throttle
handle in a specic direction. Refer to the Parts Information
manual 16573263. Failure to remove the Pin correctly will
distort or damage the throttle handle.
NOTICE
The pin hole in one side of the Lever is larger than the other
to facilitate removal and installation. Removing the Pin will
allow the Lever Lock Spring (16) and Lever Lock (14) to be
removed.
3. To remove the Throttle Lever Assembly (13), press the Throttle
Lever Pin (11) out of the throttle handle.
4. Lift o the Throttle Lever Assembly.
5. If it is necessary to disassemble Throttle Lever Assembly (13), use a
pin punch and hammer to drive the Lever Lock Pin (15) out the side
of the Lever as shown in the Parts Information manual 16573263.
6. To remove the Throttle Plunger Assembly (9), grasp the Plunger
in copper-covered vise jaws and with a twisting action, pull the
handle o the Plunger over the Throttle Plunger Stop (10).
7. To remove the Throttle Plunger Bushing (2), proceed as follows:
Grasp the ats of a 1/4”-20 tap in copper-covered vise jaws
with the thread cutting end upward.
Thread the Bushing (with the handle) onto the tap.
CAUTION
Do not heat the handle to remove the Bushing. Heat may cause
damage to factory installed internal components.
c. Using a plastic hammer, sharply rap the handle several times
in the bushing area to loosen the retaining compound. Pull
the handle with a twisting motion from the Bushing.
a.
b.
Assembly
General Instructions
1. Always press on the inner ring of a ball-type bearing when
installing the bearing on a shaft.
2. Always press on the outer ring of a ball-type bearing when
pressing the bearing into a bearing recess.
3. Whenever grasping a tool or part in a vise, always use leather-
covered or copper-covered vise jaws. Take extra care with
threaded parts and housings.
4. Always clean every part and wipe every part with a thin lm of oil
before installation.
5. Apply a lm of O-ring lubricant to all O-rings before nal assembly.
Assembly of the Throttle
1. If the Throttle Plunger Bushing (2) was removed, proceed as follows:
Insert the Throttle Plunger Bushing into the Throttle Handle
Assembly (1) to a depth approximately one-half the length of
the Bushing.
Put a few drops of M. I. Hernon No. 822 sealant completely
around the outside surface of the Bushing.
Rotate the Bushing approximately 180° to make certain the
sealant makes complete contact around the outside of the
Bushing.
Push the Bushing into the handle until it bottoms against the
shoulder inside the handle.
Allow the sealant to cure for eight hours at room temperature.
2. Install the Throttle Plunger Stop (10) in the annular groove in the
Throttle Plunger (9).
NOTICE
Make certain the Throttle Plunger Stop enters the tool air
ow chamber.
3. With the Stop lubricated and using a turning motion, insert the
assembled Throttle Plunger, Seal end leading, into the Bushing.
4. If the Throttle Lever Assembly (13) was disassembled, proceed as
follows:
Using a No. 43 drill or a piece of metal rod slightly under 0.090”
diameter as a slave pin, position the Lever Lock (14) and Lever
Lock Spring (16) in the Throttle Lever Assembly (13). Make
certain the ends of the Spring are toward the tool inlet and
the narrow end of the Lever Lock is toward the handle.
Check the functioning of the Lever Lock. If the Lock attens
against the Lever when the top portion of the Lock is pushed
forward and returns to vertical when the Lock is released, it is
assembled properly.
a.
b.
c.
d.
e.
a.
b.
While controlling the slave pin, start the Lever Lock Pin (15)
into the side of the Lever as shown in the Drawing Parts
Information Manual 16573263.
While maintaining control of the slave pin, and using a
hammer, tap the Lever Pin into position.
CAUTION
The Throttle Lever Pin must be pressed into the throttle handle
in a specic direction. Refer to the Parts Information Manual
16573263. Failure to install the Pin correctly will distort or
damage the throttle handle.
5. Position the Throttle Lever Assembly (13) on the Throttle Handle
Assembly and press the Throttle Lever Pin (11) into position
securing the Lever Assembly to the handle.
6. If the Throttle Valve Seat (8) was removed, use a at-faced rod 3/4”
(19 mm) in diameter by 4”(100 mm) long to push the Valve Seat
into the handle until it seats.
7. Rotate the Throttle Plunger Assembly until the hole in the Plunger
aligns dead center with the hole in the Throttle Valve Seat.
8. Using needle nose pliers to hold the short stem of the Throttle
Valve (7), install the Valve inserting the long stem end through
the hole in the Throttle Valve Seat and Throttle Plunger.
9. Install the Throttle Valve Spring (6), small end rst, over the short
stem of the Throttle Valve.
10. Insert the Air Strainer Screen (5), closed end leading, into the
large end of the Valve Spring.
11. Install the Inlet Bushing (4) and tighten it between 74
and 100 ft-lb (100 and 135 Nm) torque.
Assembly of the Motor
1. Clamp the large body of the Rotor (23) in leather-covered or
copper-covered vise jaws with the longer spindle shaft upward.
2. Apply a small drop of a suitable thread-locking compound to the
bottom of the O-ring groove at each of the four areas shown in
Dwg. TPD1083 of the Front End Plate Assembly (25).
c.
d.

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Glue points for 61H-A11 End Plate Assembly
Apply Adhesives
at the indicated
places
(Dwg. TPD1083)
3. Place the Front End Plate Seal (26) on the end plate hub and
lightly press the Seal against the adhesive at the four contact
points to bond the Seal to the End Plate.
4. Install the End Plate Assembly, Seal end trailing, over the shaft of
the Rotor.
5. Using nger pressure, press the Seal Cup Assembly (28), felt end
trailing, onto the Rotor Spacer (27) until the felt seal cup is ush
with one end of the Spacer. Impregnate the felt with
Ingersoll Rand No. 50 Oil.
6. Install the Spacer, Seal Cup trailing, over the shaft of the Rotor.
Make certain the Spacer enters the central opening of the Front End
Plate and the Seal Cup Assembly enters the recess in the End Plate.
7. Install the Front Rotor Bearing, red stained end trailing, over the
shaft of the Rotor.
8. If the Bearing Nut Retainers (32) were removed from the Bearing
Nut Assembly (31), use snap ring pliers to install the Retainers on
the Nuts.
9. Thread the Nut onto the shaft of the Rotor, Retainer end leading,
and tighten the Nut between 14 and 19 ft-lb (19 to 26 Nm) torque.
10. Remove the Rotor from the vise and after turning it end for end,
clamp the copper-covered vise jaws on the ats of the Bearing
Nut with the unassembled rotor shaft upward.
11. Wipe each Vane (24) with a light lm of oil and place a Vane in
each slot in the Rotor.
12. One end of the Cylinder Assembly (21) has three ports while the
other end has one. With the end having three ports toward the
Front End Plate, install the Cylinder Assembly over the Rotor.
Make certain the Cylinder Dowel Pin (22) at that end enters the
small notch in the End Plate.
13. Install the Rear Rotor Bearing Washer (20) into the counterbore of
the Rear End Plate Assembly (18).
14. Insert the Controller Assembly (17), bearing end leading, into the
rear end plate counterbore against the Bearing Washer. Make
certain the Wiper Plate Alignment Pin (19) enters the slot in the
brass wiper plate of the Controller Assembly.
15. With the Rear End Plate Assembly leading, thread the Controller
Assembly onto the shaft of the Rotor. Using the Controller
Wrench (57), tighten the Controller Assembly between 8 and 10
ft–lb (10.5 and 13.5 Nm) torque.
Assembly of the Tool
1. Drop the two Motor Clamp Washers (30), concave side trailing,
into the large end of the Arbor Housing (33).
2. Remove the assembled motor from the vise and insert it,
Controller Assembly trailing, into the Arbor Housing. Make certain
the Bearing Nut Assembly (31) at the front of the motor engages
the Arbor Coupling (39).
3. Thread the Throttle Handle Assembly (1) into the assembled
Arbor Housing and tighten the joint between 74 and 100 ft-lb
(100 and 135 Nm) torque.
4. Install the two Rear End Plate Retaining Screws (12) ush with the
handle surface or one thread below ush. If the Screws protrude
above the handle surface, the Rear End Plate Assembly (18) is not
properly engaged and is out of position.
5. Install the Rear Exhaust Deector Seal (35) in the internal groove
at the large end of the Exhaust Deector (34).
6. Install the Front Deector Seal (36) on the hub of the Arbor
Housing adjacent to the wrench ats.
7. Slide the Exhaust Deector onto the Arbor Housing and, using
a thin blade screwdriver, spiral the Deector Retaining Ring (37)
into the groove ahead of the Deector.
8. Using nger pressure, press the Seal Cup Assembly (38), felt end
trailing, onto the small end of the Bearing Nut Assembly (31) until
the felt seal cup is ush with the end of the Nut. Impregnate the
felt with Ingersoll Rand No. 50 Oil.
9. Push the Rear Arbor Bearing (40) onto the threaded hub farthest
from the wrench ats on the Arbor Assembly (41).
10. Thread the assembled Bearing Nut Assembly/Seal Cup Assembly
onto the Arbor with the Seal Cup toward the Bearing. Tighten the
Nut between 14 and 19 ft-lb (19 and 26 Nm) torque.
11. Position the Seal Cup Assembly (42), felt end trailing, onto the
Arbor near the wrench ats. Use the Wheel End Bearing (43) to
push the Seal Cup Assembly onto the Arbor until the Bearing
seats. Remove the Bearing and impregnate the felt with
Ingersoll Rand No. 50 Oil.
12. For Models 61H120H63, 61H120H64 and 61H150H63,
proceed as follows:
Apply 1 cc of Ingersoll Rand No. 68 Grease to the inside
surfaces of the Arbor Coupling (39) and install the Coupling
on the Bearing Nut at the motor end of the Arbor.
Insert the assembled Arbor, Coupling end rst, into the Arbor
Housing, making certain the Coupling engages the Bearing
Nut on the Rotor.
Install the Wheel End Bearing (43) and Bearing Clamp
Washer (44), concave end leading, onto the Arbor.
If the Dust Washer (45) was removed from the inside of the
Wheel Guard (47), install a new Washer and impregnate it with
Ingersoll Rand No. 50 Oil.
NOTICE
The Wheel Guard has left–hand threads.
e. While placing the Wheel Guard to the desired position, thread
the Guard onto the Arbor Housing and tighten it between 40
and 50 ft-lb (54 and 68 Nm) torque.
f. Insert the Inner Wheel Flange Key (49) into the slot on the
Arbor.
g. Align the internal slot in the Inner Wheel Flange (48) with the
Key and install the Inner Wheel Flange on the Arbor through
the Wheel Guard.
h. Using snap ring pliers, install the Inner Wheel Flange
Retainer (50) on the Arbor against the Flange.
NOTICE
To seat the Retainer and bias the motor, make a spacer from
tubing that will t over the Arbor and is approximately the
size of the Retainer. After sliding the spacer onto the Arbor,
thread the Wheel Flange Nut (52) onto the Arbor until the
Retainer is snug against the Inner Wheel Flange. Remove the
Nut and spacer.
i. If the Oil Chamber Plug (3) was removed and the oil drained,
ll the oil chamber with Ingersoll Rand No. 50 Oil and tighten
the Plug between 3.5 and 6 ft-lb (5 and 8 Nm) torque.
j. Install a grinding wheel, the Outer Wheel Flange (51) and the
Wheel Flange Nut (52).
13. For Models 61H120G4, 61H120L6, 61H150G4 and 61H150L6,
proceed as follows:
a. If the Dust Washer (45) was removed from the inside of
the Wheel End Bearing Cap (46), install a new Washer and
impregnate it with Ingersoll Rand No. 50 Oil.
b. Install the Wheel End Bearing (43) on the Arbor and position
the Bearing Clamp Washer (44) on the Arbor with the concave
end against the Bearing.
c. Position the Wheel End Bearing Cap over the Arbor against the
Washer.
NOTICE
While tightening the Cone Wheel Adapter (53) or Collet
Body (54), maintain the alignment of the Bearing, Washer
and Cap to facilitate Arbor insertion into the Housing.
a.
b.
c.
d.

16573321_ed3 5
d. Thread the Cone Wheel Adapter or Collet Body onto the Arbor
and tighten it between 14 and 19 ft-lb (19 and 26 Nm) torque.
e. Apply 1 cc of Ingersoll Rand No. 68 Grease to the inside
surfaces of the Arbor Coupling (39) and install the Coupling
on the Bearing Nut at the motor end of the Arbor.
f. Insert the assembled Arbor, Coupling end rst, into the Arbor
Housing making certain the Coupling engages the Bearing
Nut on the Rotor.
NOTICE
The Wheel End Bearing Cap has left-hand threads.
g. Thread the Wheel End Bearing Cap into the Arbor Housing
and tighten it between 40 and 50 ft-lb (54 and 68 Nm) torque.
h. If the Oil Chamber Plug (3) was removed and the oil drained,
ll the oil chamber with Ingersoll Rand No. 50 Oil and tighten
the Plug between 3.5 and 6 ft-lb (5 and 8 Nm) torque.
i. For Models 61H120G4 and 61H150G4, install the Collet (55),
Collet Nut (56) and a burr.
j. For Models 61H120L6 and 61H150L6, install a cone wheel.
Inspecting and Resetting the Controller
Over a period of time, wear on the valve face of the Controller
Assembly (17) or on the nozzle face in the Throttle Handle
Assembly (1) could cause the Controller to lock the Grinder in an
inoperable condition. The cause of the locked condition must
be corrected before the Grinder can be operated. To correct the
condition, proceed as follows:
1. Using a 5/64” hex wrench, unscrew and remove the two Rear End
Plate Retaining Screws (12).
2. Using a wrench on the ats of the Arbor Housing (33) and
another on the ats 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
a vise with the Controller Assembly upward.
4. Using the Controller Wrench (57) on the ats of the Controller
Assembly, unscrew and remove the Controller Assembly.
5. Pull the Rear End Plate Assembly (18) and Rear Rotor Bearing
Washer (20) o the Controller.
6. The Controller is in the locked position if the lockout gap shown in
Dwg. TPD1085 exists and the “A” dimension measures 2.00”
(50.8 mm).
Normal Position
Lockout Position
Pull
PULL
Shallow,
small Hole
Lockout Gap
“A”
“B”
Controller
Valve Face
(Dwg. TPD1085)
To reset the Controller, proceed as follows:
One of the ats on the metal ring has a shallow, small hole in
the center of the at. Position that at upward and grasp the
brass wiper plate and the nose cone section of the Controller
with your hands.
a.
While pulling the wiper plate away from the nose cone
section, lightly rap the entire Assembly on a workbench
surface. Repeat this process until the nose cone section goes
ush against the ring when the wiper plate and nose cone
are released.
7. After resetting the Controller, and using verniers or a micrometer,
measure the length of the Controller from the end of the shaft to
the end of the nose cone. If the “B”dimension in Dwg. TPD1085
measures less than 1.896”(48.16 mm), replace the Controller
Assembly.
8. To determine if the nozzle face in the Throttle Handle is worn, a
measurement must be taken from the nozzle face to the shoulder
where the brass wiper plate seats. (Refer to Dwg. TPD1084). If
the “C”dimension is greater than 1.365” (34.67 mm), replace the
Throttle Handle.
Nozzle Face
“C”
(Dwg. TPD1084)
NOTICE
There are a number of ways to obtain the“C” dimension in
Dwg. TPD1084. One method is to make a steel plug
having a 1.594” (40.5 mm) diameter, a 1/2” (13 mm) hole
through the center and both ends surface-ground parallel
to a 1.25” (31.75 mm) length. Insert the plug into the Throttle
Handle and using a depth micrometer, measure through the
plug to the nozzle face. Subtract the length of the plug from
the measured length to determine the“C” dimension.
9. Install the Rear Rotor Bearing Washer into the counterbore of the
Rear End Plate Assembly.
10. Insert the Controller Assembly, bearing end leading, into the rear
end plate counterbore against the Bearing Washer. Make certain
the Wiper Plate Alignment Pin (19) enters the slot in the brass
wiper plate of the Controller Assembly.
11. With the Rear End Plate Assembly leading, thread the Controller
Assembly onto the shaft of the Rotor (23). Make certain the
Cylinder Dowel Pin (22) enters the notch in the End Plate.
12. Using the Controller Wrench, tighten the Controller Assembly
between 8 and 10 ft-lb (10.5 and 13.5 Nm) torque.
13. Drop the two Motor Clamp Washers, concave side trailing, into
the large end of the Arbor Housing.
14. Remove the assembled motor from the vise and insert it,
Controller Assembly trailing, into the Arbor Housing. Make certain
the Bearing Nut Assembly at the front of the motor engages the
Arbor Coupling (39).
b.

6 16573321_ed3
15. Thread the Throttle Handle Assembly into the assembled Arbor
Housing and tighten the joint between 74 and 100 ft-lb (100 and
135 Nm) torque.
16. Install the two Rear End Plate Retaining Screws ush with the
handle surface or one thread below ush. If the Screws protrude
above the handle surface, the Rear End Plate Assembly is not
properly engaged and is out of position.
17. After assembling the tool, test the Grinder. If the Controller
length “B”and nozzle face length “C” were within tolerance and
the Controller locks the Grinder in an inoperable condition when
tested, replace the Controller Assembly.
Troubleshooting Guide
Trouble Probable Cause Solution
Low power or low free speed Insucient air pressure at the inlet Check the air pressure at the inlet. It must be 90 psig
(6.2 bar/620 kPa).
Plugged Screen Clean the Inlet Bushing Screen in a clean, suitable, cleaning
solution. If it cannot be cleaned, replace it.
WARNING
Never operate a Grinder without an Inlet Screen.
Ingestion of dirt into the Grinder can, in some cases, cause
an unsafe condition.
Worn or broken Vanes Replace a complete set of new Vanes.
Worn or broken Cylinder Replace the Cylinder if it appears cracked or if the bore is
wavy or scored.
Improper lubrication or dirt build-up in the
motor
Lubricate the Grinder as instructed in LUBRICATION. If
lubrication does not result in satisfactory operation,
disassemble the motor, clean and inspect all parts.
Rough operation Worn or broken Rear Rotor Bearing Assembly
or Front Rotor Bearing
Examine each bearing. Replace the Rear Rotor Seal Assembly
if worn or damaged or replace the Front Rotor Bearing.
Bent Arbor Mount the Arbor on centers. Check bearing diameter runout
with an indicator. Replace the Arbor if runout exceeds 0.002”
(0.051 mm) Total Indicator Reading.
Scoring Improper assembly Make certain that all motor parts are properly aligned prior to
installing the Handle Assembly into the Arbor Housing.
Air leaks Worn Valve Seat or Valve Seat Washer Replace worn parts.
Worn Throttle Valve Seals Replace both Seals.
Oil Chamber Plug worn or not tight Tighten the Plug. If the problem persists, replace the Plug.
High free speed Worn Rear End Plate Assembly and/or
Controller Seal
Replace the Rear End Plate Assembly if the large inside
diameter of the Rear End Plate is worn to 1.156”(38.506 mm)
or larger and/or the outside diameter of the Controller Seal is
worn to 1.511”(38.379 mm) or smaller.
Grinder will not run Coupling Nut too tight Loosen Coupling Nut and retighten to 47.5 to 52.5 ft–lb (64.5
to 71.5 Nm) torque.
WARNING
Do not exceed 52.5 ft-lb (71.5 Nm) torque.
Related Documentation
For additional information refer to:
Product Safety Information Manual 04584959, 04580288.
Product Information Manual 16573214, 16576100, 16576118, 16576126.
Parts Information Manual 16573263.
Manuals can be downloaded from ingersollrandproducts.com.

Notes:

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