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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

Whenever a Series 88H Grinder is disassembled for overhaul or 

replacement of parts, lubricate as follows:
Inject about 1.5 cc of 

Ingersoll Rand

 Pneu-Lube® Medium Lubricant 

No. 50 into the Inlet Bushing (4) after assembly. Fill the oil chamber. 

After each eight hours of operation, replenish the oil supply.

The use of an air line lubricator is recommended with these 

Grinders. Where the lubricator cannot be permanently mounted, we 

recommend using

 Ingersoll Rand

 No. 8LUB12 Lubricator.

For permanent installations, we recommend using 

Ingersoll Rand

 

No. C31-06-G00 Filter-Lubricator-Regulator Unit. These units have 

3/4” pipe tap, 1/2 pt. (237 ml) capacity. Larger capacity units may 

be used, but do not use a unit having less than a 3/4” pipe tap inlet 

and outlet.

Oiler Adjustment

The built-in lubricator has been properly adjusted at the factory. 

A lack of oil indicates the Oiler needs filling or the Oiler Felts are 

clogged and must be replaced as follows:

For Grip Handle Models

Remove the Arbor Housing Screws (30), Lock Washers (31) and 

Arbor Housing Gasket (32).

Remove the Oil Chamber Plug (24) and pour the oil from the       

oil chamber.

Using snap ring pliers remove the Oiler Retainer (19).

Insert a 1/4 x 20 (M6 x 1.0) machine screw in the pilot hole of the 

Oiler Body Assembly (18). See Dwg. TPD638.

(Dwg. TPD638)

1.

2.

3.

4.

5.  Grasping the screw head with pliers, pull out the Oiler Body 

Assembly (18).

6.  With a thin-blade screwdriver, unscrew the Oiler Adjusting     

Screw (20).

7.  Using tweezers or a piece of bent wire, remove the Oiler Felts (21) 

and install a new set.

8.  Replace the Oiler Adjusting Screw, installing it slightly below 

flush.

9.  Replenish the oil supply.

For Lever Handle Models

Remove the Arbor Housing Screws (30), Lock Washers (31) and 

Arbor Housing Gasket (32).

Remove the Oil Chamber Plug (24) and pour the oil from the oil 

chamber.

Using snap ring pliers, remove the Oiler Retainer (19).

Insert lock ring pliers in the hole of the Oiler Body Assembly (18) 

and pull out the Oiler Body Assembly.

With a thin-blade screwdriver, unscrew the Oiler Adjusting  

Screw (20).

Using tweezers or a piece of bent wire, remove the Oiler Felts and 

install a new set.

Replace the Oiler Adjusting Screw, installing it slightly below flush.

Replenish the oil supply.

1.

2.

3.

4.

5.

6.

7.

8.

Disassembly

General Instructions

Do not disassemble the tool any further than necessary to replace 

or repair damaged parts.

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.

1.

2.

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.

Do not disassemble the tool unless you have a complete set of 

new gaskets and O-rings for replacements.

3.

4.

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