Ingersoll-Rand 2131 User Manual

45481785

March 2007

Air Impact Wrench

2131 Series

Maintenance Information

Edition 1

Save These Instructions

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WARNING

Always wear eye protection when operating or performing maintenance on this tool.

NOTICE

POWER MANAGEMENT DIAL

NOTICE

Always turn o the air supply and disconnect the air supply hose before installing, removing or adjusting any accessory on this tool or before performing any maintenance on this tool.

Note: When reading the instructions, refer to exploded diagrams in parts Information Manuals when applicable (see under Related

Documentation for form numbers).

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 leathercovered vise jaws to protect the surface of the part and help prevent distortion. This is particularly true of threaded members and housings.

4. With the Anvil removed, lift out the two Hammer Pins.

The twin hammers are now free to slide from the Hammer Frame. Be careful not to drop them.

Disassembly of the Motor

Always use leather-covered vise jaws when clamping the handle in a vise. Leather will conform to the shape of the handle and allow the tool to be held securely. To prevent damage to the exhaust diuser, never clamp only the bottom of the handle.

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 Impact Wrench

1. Clamp the handle of the impact wrench in a vise with leathercovered jaws with the square driver positioned horizontally.

Avoid excessive clamping pressure which can damage the Housing and can cause diculty when removing the parts.

2. Unscrew and remove the four Hammer Case Screws (11).

3. While lightly tapping on the end of the Anvil (8) with a plastic hammer, lift o the Hammer Case (15) and Hammer Case Gasket (18).

The Front End Plate (2) might come o during the removal of the Hammer Case. Make sure that it does not drop on the oor or strike a hard or metallic surface since it might be damaged.

4. Grasp the Hammer Frame (12) and carefully lift o the entire impact mechanism, making certain not to drop the two Hammer Pins (13).

Disassembly of the Impact Mechanism

1. Set the mechanism, driver end up, on the workbench.

Note the twin hammers within the Hammer Frame. These are identical, but must be placed in the Hammer Frame in a certain relationship. Using a felt-tipped pen, mark he top “T” hammer and the bottom hammer “B” with the arrows pointing upward. Mark both Hammers on the same end.

2. With the mechanism sitting upright on the workbench, slowly rotate the Anvil in a clockwise direction until it comes up solid.

When pulling, disassembling or assembling the motor, we recommend replacement of the Motor Gasket (7).

1. Remove the Motor Assembly from the Housing (19) by pushing on Power Management Dial (35) from the back of the Housing. Refer to Dwg. TPD1322.

(Dwg. TPD1322)

If the Motor Assembly cannot be removed from the Housing by pushing, tap the Power Management Dial lightly until the Motor Assembly is free.

2. Remove the Silencer (6A) from the top of the Cylinder (1). Remove the Power Management Dial from the rear of the Cylinder (1). Remove the Power Management Dial Seal (5A) if it needs to be replaced.

3. Remove the Front End Plate (2) from the Cylinder by tapping the splined end of the Rotor (5) with a plastic hammer. If the Front End Plate does not come loose, secure a center punch in a vise with the point angled downward and outward from the vise. Grasp the Cylinder and Front End Plate in one hand and position the hole in the end of the Rotor against the punch.

If you continue to rotate the Anvil, it will cam the Hammers out of engagement. Don’t do this; merely rotate the Anvil until it comes up solid.

3. Hold the Hammer Frame rmly and without disturbing the hammers, gently lift the Anvil while simultaneously rotating it clockwise about 1/8 of a turn, from the Hammer Frame.

Be careful not to drop the Cylinder since it can be damaged by hitting a hard surface.

Using the other hand, tap the punch with a hammer while pressing the Rotor against the punch. After a few taps, the Front End Plate will slide o of the Cylinder.

NOTICE

To prevent damage to the Cylinder, do not tap or strike Cylinder on

FRONT END PLATE

FRONT ROTOR BEARING

BENCH WITH NONMETALLIC SURFACE

CYLINDER

REAR ROTOR BEARING

BENCH WITH NONMETALLIC SURFACE

NOTICE

LEFT-HAND BUTTON

INLET BUSHING

INLET CLIP

REMOVAL TOOL

ASSEMBLY

TRIGGER

SLOT FOR TAB (BOTH SIDES)

TAB ON INLET RETAINER CLIP (BOTH SIDES)

TILT VALVE STEM

HOOKED TOOL

NOTICE

a hard or metallic surface when removing the Rotor Bearings (3).

To remove the Front Rotor Bearing, hold the Front End Plate with Front Rotor Bearing down and tap the Front End Plate on a at, nonmetallic surface such as a work bench. This will loosen the Front Rotor Bearing so that it will drop out of the Front End Plate. Refer to Dwg. TPD1323.

1. Secure the Inlet Bushing in a vise. Press in both tabs of the Inlet Retainer Clip (27) and pull upward on the Housing (19). This will allow the Inlet Bushing to come free from the Handle of the Housing. Refer to Dwg. TPD1326.

2. Pull the Trigger (28) from the front of the Housing and remove the Trigger O-ring (2A).

(Dwg. TPD1323)

4. Remove the Rear Rotor Bearing Retainer (6) from the rear of the Rotor (5). The Rotor can now be removed from the Cylinder. Remove the Vanes (4) from the Rotor if they need to be replaced.

(Dwg. TPD1324)

5. To remove the Rear Rotor Bearing, hold the Cylinder with the Rear Rotor Bearing down and tap the Cylinder on a at, nonmetallic surface such as a work bench. This will loosen the Rear Rotor Bearing so that it will drop out of the Cylinder. Refer to Dwg. TPD1324.

6. Working from the rear of the Housing, push out the Motor Gasket (7).

When removing the Motor Gasket, do not use a screwdriver or any other sharp object which could damage the Gasket and/or Housing.

Disassembly of the Throttle Mechanism

For ease of disassembly, we recommend using the Inlet Clip Removal Tool (36). See Dwg. TPD1681.

(Dwg. TPD1681)

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(Dwg. TPD1326)

3. With the Inlet Bushing still in the vise, remove the Tilt Valve Seat Retainer (1G) and Tilt Valve Seat Support (1F). Use a hooked tool with no sharp edges to remove the Tilt Valve Seat (1E) from the Inlet Bushing. Refer to Dwg. TPD1327.

(Dwg. TPD1327)

4. Remove the Tilt Valve (1D) and Tilt Valve Spring (1C) if damaged.

5. Remove the Inlet Bushing Seal (1B) and Inlet Retainer Clip (27) if damaged. Remove Washer (1A).

Do not remove the Inlet Bushing Screen (20A) from the Inlet Bushing unless it is damaged. Clean the Inlet Bushing Screen by using a suitable cleaning solution in a well ventilated area.

Disassembly of the Reverse Valve Mechanism

The Reverse Valve Assembly cannot be removed without rst removing the Forward and Reverse Buttons (4A) and (4B). Therefore, it is important that the procedure below be followed exactly.

1. Notice the notches on either side of the partition. These notches indicate the correct location for insertion of a thin-bladed screwdriver used for removing the Forward and Reverse Buttons. Insert the screwdriver between the partition and the Button which is fully extended. Gently pry against the Button to disengage the detent so that the Button can be removed. After the Button is removed, reach inside the Housing and rotate the Reverse Valve to extend the remaining Button. Repeat the above procedure for the remaining Button. Refer to Dwg. TPD1328.

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