Ingersoll Rand Impact Driver 2925Ti User Manual

04584348

Edition 2

April 2006

Air Impact Wrench

2925Ti Series

Maintenance Information

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3. Hold the Hammer Frame firmly and, without disturbing

the Hammers, gently lift the Anvil, simultaneously rotating

it clockwise about 1/8 of a turn, from Hammer Frame.

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

2. Remove the Backcap, Motor Clamp Washer (21) and

Backcap Gasket from the Housing and set them aside on

a clean bench. Discard the Backcap Gasket and replace

it with a new one when assembling the tool.

3. Lift the Housing from the Hammer Case. Place one hand

over the rear of the Housing and turn the Housing over so

that the assembled motor can slide and be guide out of

the Housing.

4. Place the assembled motor on a clean bench with the

rotor spline facing upward.

5. Remove the Front End Plate (29) and Cylinder (27).

6. Remove the Rotor (25) from Rear End Plate (23).

7. Remove the Vanes from the Rotor.

NOTICE

The twin Hammers are now free to slide from the

Hammer Frame. Be careful not to drop them.

Disassembly of the Reverse Valve

1. Remove the four Backcap Bolts (14)

2. Lift the Backcap off of the rear of the Housing.

3. Discard the Backcap Gasket (15) and replace it with a

new one when assembling the tool.

4. Use a hooked tool to remove the Reverse Valve (32) from

the reverse valve bushing. Set the Reverse Valve aside

on a clean bench.

8. Inspect all motor parts including the Front Rotor

Bearing (30) and Rear Rotor Bearing (22) and replace all

worn or damaged parts.

Disassembly of the Throttle Mechanism

5. Remove and discard the Reverse Valve O-ring (31).

Replace it with a new one when assembling Reverse Valve.

6. Use a flat, thin blade screwdriver to remove the Reverse

Lever Retaining Ring (19) and Reverse Lever Spring (20)

from the Reverse Lever (18).

1. Unscrew and remove the Air Inlet Bushing (18).

2. Remove the Screen (7), Throttle Valve Spring (6) and

Throttle Valve (5).

3. If the Throttle Valve Seat (2) requires replacement, insert

a hooked tool through the center of the Valve Seat.

Catching the backside of the Seat with the hook, pull the

Seat from the Housing.

4. Withdraw the Trigger Assembly (3) from Housing.

5. Remove the Retaining Ring (11), Exhaust Deflector (12)

and Muffler Element (10) from the Housing.

7. Remove the Reverse Lever from the Backcap.

Disassembly of the Motor

1. Remove the four Backcap Bolts.

Assembly

4. As an alternate assembly procedure, drop the Throttle

Valve, long stem first, into the inlet passage. If the throttle

Valve does not sit squarely on the Throttle valve Seat,

shake the Handle until it seats.

5. Install the Throttle Valve Spring (6), small end first, with

the inside diameter of the small first coil around the hub

of the Throttle Valve.

6. Coat the Inlet Bushing O-ring (9) with O-ring lubricant and

install it on the Inlet Bushing (8).

7. Screw the Inlet bushing into the Housing until snug and

tighten to 50-55 ft. lbs. (68-75 Nm) torque.

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 or housings.

4. Always clean every part and wipe every part with a thin

film of oil before installation.

5. Apply a film of O-ring lubricant to all O-rings before final

assembly.

6. Check every bearing for roughness. Sealed or shielded

bearings should never be cleaned. Work grease

thoroughly into every open bearing before installation.

8. Wipe the stem of the Trigger Assembly (3) with light

grease and insert the stem of the Trigger into the trigger

bore in the Housing until it snaps into place on the

Throttle Valve.

Assembly of the Motor

Assembly of the Throttle Mechanism

1. Pack the Front Rotor Bearing (30) and Rear Rotor

Bearing (22) with the recommended grease. Install the

Front Rotor Bearing in the Front End Plate (29) and the ar

Rotor Bearing in the Rear End Plate (23).

2. Slide the assembled Rear End Plate and Rear Rotor

Bearing on the hub of the Rotor (25).

3. Set the assembled Rear End Plate and Rotor on a clean

surface with the spline of the Rotor pointing upward.

4. Insert the Vanes (26) in the vane slots on the Rotor.

5. Install the Front and Rear Cylinder Dowels (28) in the

Cylinder (27).

1. Install a new Throttle Valve Seat (2) by pushing it into

position in the Housing (1) with a 13/16” dowel.

2. Insert the short end of the stem of the Throttle Valve (5)

into the jaws of an expanding-type mechanical pencil.

Allow the jaws to retract around stem to secure it.

3. Install the Throttle Valve on the Valve Seat.

See Dwg. TPD1919.

6. Slide the Cylinder over the Rotor and Vanes making sure

that the Rear Cylinder Dowel enters the notch in the

outside diameter of the Rear End Plate.

For Series 2925RBP1Ti and 2925RBP3Ti: Assemble

Cylinder with exhaust ports to LEFT of top dead center

(11 o’clock position). See Dwg. TPD1921.

(Dwg. TPD1919)

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ALIGN REVERSE VALVE

TIMING MARK WITH

MARK ON REVERSE

VALVE BUSHING LO-

CATED IN HOUSING

REVERSE LEVER IN

FORWARD POSITION

(Dwg. TPD1913)

(Dwg. TPD1921)

NOTICE

The Reverse Valve must be installed and indexed with

the bushing as directed in Step 2 and Dwg. TPD1913.

Failure to do so will cause improper operation of the

Reverse Valve.

If more power is needed for forward operation than for

reverse operation, install the Cylinder with exhaust ports

to the RIGHT of top dead center (1 o’clock position).

7. Install the assembled Front End Plate and Bearing over

the front, splined end of the Rotor making sure that the

front Cylinder Dowel fits into the notch in the outside

diameter of the Front End Plate.

8. Grasp the Housing with one hand and set it upside down

on its top. With the other hand, carefully guide the motor

assembly into the Housing, making sure that the side of

the motor assembly containing the Cylinder Dowels is

oriented to the top of the Housing. Install Locating Pin (24)

into Housing and End Plate. See Dwg. TPD1920-1.

3. Insert the Reverse Lever (18) through the rear of the

Backcap (16).

4. Slide the Reverse Lever Spring (20) over the shaft of the

Reverse Lever and secure the Spring and Reverse Lever

by installing the Reverse Lever Snap Ring (19) in the

groove in the shaft of the Reverse Lever. Rotate the

Reverse Lever so that it is pointing to the symbol for

FORWARD (clockwise) operation. See Dwg. TPD1913.

Assembly of the Impact Mechanism

NOTICE

To ensure proper Reverse Valve operation, the Reverse

Lever must stay in this position when installing the

Backcap and Reverse Valve.

TOP HAMMER HALF–ROUND

NOTCH ON RIGHT

TOP HAMMER

WIDE BEVEL UP

(Dwg. TPD1920-1)

Assembly of the Reverse Valve

1. Coat a new Reverse Valve O-ring (31) with O-ring

lubricant and install it in the groove on the Reverse

Valve (32).

2. Install the Reverse Valve in the reverse valve bushing

with the slotted end trailing, making sure that the index

mark on the Reverse Valve is aligned with the index mark

on the Bushing. See Dwg. TPD1913.

BOTTOM HAMMER

HALF–ROUND

NOTCH ON LEFT

BOTTOM HAMMER

WIDE BEVEL DOWN

(Dwg. TPD652)

1. Coat the Hammers (35) with a light film of

Ingersoll Rand No. 170 Grease.

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2. Replace the Hammers in the Hammer Frame (34) exactly

as they were when you marked them prior to

disassembly.

Assembly of the Tool

1. Wipe a thin film of the recommended grease on the inside

of the Hammer Case Bushing (38) and insert the

assembled impact mechanism into Hammer Case (39).

2. Secure the Hammer Case and impact mechanism by the

anvil (square drive) end in leather-covered or copper-

covered vise jaws. See Dwg. TPD1918.

NOTICE

If you are installing new Hammers or want to change the

location of the existing Hammers to utilize both

impacting surfaces, slide the Hammers in the Hammer

Frame so that the half-round notch on one Hammer is

located on one side of the Frame and the half-round

notch on the other Hammer is located on the other side

of the Frame. These Hammers must be installed with the

wide bevels facing the web of the Hammer Frame as

illustrated.

3. Replace the Hammer Pins (36).

4. Examine the base of the Anvil (40, 42 or 48) and note its

contour. While looking down through the Hammer Frame,

swing the top Hammer to its full extreme one way or

another until you can match the contour of the Anvil.

Enter the Anvil into the Hammer Frame and through the

first Hammer. Swing the bottom Hammer in the opposite

direction from the top Hammer and maneuver the Anvil

slightly until it drops into the bottom Hammer.

Assembly of the Square Drive Anvil and Spline

Drive Anvil

1. Place the Hammer Frame Washer (33), hub side first,

over the hub of the Rotor and against the Front Rotor

Bearing.

(Dwg. TPD1918)

2. Set the assembled impact mechanism down over the

splined hub of the Rotor. If the impact mechanism was

disassembled, refer to Assembly of Impact Mechanism.

3. Position the new Hammer Case Gasket (37) on Housing.

4. Work approximately 12 to 15 cc of Ingersoll Rand

No. 170 Grease into the impact mechanism.

5. Smear a thin film of Ingersoll Rand No. 170 Grease on

the inside surface of the Hammer Case Bushing (38) and

place the Hammer Case (39) down over the Anvil and

against the Motor Retainer.

3. Install a new Hammer Case Gasket (37) on the Hammer

Case making sure that the holes in the gasket align with

the holes in the Hammer Case.

NOTICE

When installing optional Hanger Kit, place Gasket on the

Hammer Case followed by the Hanger.

6. Install the Backcap Bolts and tighten them to 10 to 12 ft-lb

(13 to 16 Nm) torque.

7. Remove the Impactool from the vise and inject 2 to 4 cc

of Ingersoll Rand No. 170 Grease into the Grease

Fitting (17).

4. Wipe a small amount of the recommended grease on the

flat side of the Hammer Frame Washer (33) and place it

on the splined face of the Hammer Frame (34) with the

hub end of the washer pointing up.

NOTICE

Assembly of the Quick-Change Anvil

When installing optional Hanger Kit, place additional

washer provided between the Hammer Frame and

Hammer Frame Washer.

1. Place the Hammer Frame Washer (33), hub side first,

over the hub of the Rotor and against the Front Rotor

Bearing.

2. Set the assembled impact mechanism down over the

splined hub of the Rotor. If the impact mechanism was

disassembled, refer to Assembly of Impact Mechanism.

3. Position the new Hammer Case Gasket (37) on Housing.

4. Work approximately 12 to 15 cc of Ingersoll Rand

No. 170 Grease into the impact mechanism.

5. Smear a thin film of Ingersoll Rand No. 170 Grease on

the inside surface of the Hammer Case Bushing (38) and

place the Hammer Case (39) down over the Anvil and

against the Motor Retainer.

6. Install the Backcap Bolts (14) and tighten them to

10 to 12 ft-lb (13 to 16 Nm) torque.

7. Reinstall the rear Thrust Ring Lock (44) on the Quick

Change Anvil.

8. Place a dab of grease into the hole in the Quick Change

Anvil (42) to temporarily hold the Retaining Ball (47).

9. Slide the Retaining Sleeve (43), Retaining

Sleeve Spring (46), Thrust Ring (45), and front Thrust

Ring Lock (44) onto the Anvil.

10. Remove the Impactool from the vise and inject 2 to 4 cc

of Ingersoll Rand No. 170 Grease into the Grease

Fitting (17).

5. Set the fully assembled Motor Housing over the opening

in the Hammer Case. Insert the spline drive of the Rotor

into the splined hole of the impact mechanism. Make sure

of the wide section of the Hammer Case is just above the

Trigger.

6. Place a new Backcap Gasket (15) over the rear of the

Housing making sure that the holes in the Gasket align

with the holes in the Housing and that the profile of the

Gaskets matches the profile of Housing.

7. Place a Motor Clamp Washer (21) over the rear of the

motor with the convex side up and matching the large

outside diameter of the Rear End Plate.

8. Place the Backcap (16) over the back of the Housing

making sure that the Reverse Valve Lever (18) is in the

full-forward (clockwise) position with the lugs in the Lever

engaging the slots in the Reverse Valve. Make sure that

the index mark on the Reverse Valve lines up with the

index mark on the reverse valve bushing.

9. Install the four Backcap Bolts and tighten to 10-12 ft-lbs

(13-16 Nm) torque.

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Troubleshooting Guide

Trouble

Probable Cause

Solution

Dirty Inlet Bushing or Air Strainer

Screen and/or Exhaust Silencer

Using a suitable cleaning solution, in a well ventilated area, clean Air

Strainer Screen, Inlet Bushing and Exhaust Silencer.

Worn or broken Vanes

Replace the complete set of Vanes.

Low power

Worn or broken Cylinder and/or

scored End Plates

Examine the Cylinder and replace it if it is worn or broken or if the bore is

scored or wavy. Replace the End Plates if they are scored.

Disassemble tool and clean all parts with a suitable cleaning solution, in a

well-ventilated area. Reassemble tool as instructed in this manual.

Dirty motor parts.

Improper positioning of the

Reverse Valve Lever or Reverse

Valve

Make certain that the Reverse Valve Lever is in the reverse position or one

of the three forward positions. If the tool has been disassembled, refer to

Dwg. TPD1913 for proper Reverse Valve and Reverse Lever orientation.

Motor will

not run

Disassemble the motor, replace worn or broken parts and reassemble as

instructed.

Incorrect assembly of the motor.

Insufficient lubricant in the impact

mechanism

Remove the Hammer Case Assembly and lubricate the impact

mechanism.

Tool will

not impact

Broken or worn impact

mechanism parts

Remove the Hammer Case and examine the impact mechanism parts.

Replace any worn or broken parts.

Impact Mechanism not assembled

correctly.

Refer to Assembly of the Impact Mechanism.