Ingersoll-Rand 2161P Series Instructions Manual page 12

Disassembly of the Impact Mechanism
Disassemble the impact mechanism as follows:
1. Set the mechanism, driver end up, on the workbench.
Using a felt tipped pen, mark one end of the Hammer
" " with the arrow pointing upward.
2. With the mechanism sitting upright on the workbench,
slowly rotate the Anvil in a clockwise direction until it
comes up solid.
If you continue to rotate the Anvil, it will cam the
Hammer out of engagement. Don't do this; merely
rotate the Anvil until it comes up solid.
3. Hold the Hammer Frame firmly and, without
disturbing the Hammer, gently lift the Anvil from the
Hammer Frame.
4. With the Anvil removed, lift out the two Hammer Pins.
The Hammer is now free to slide from the Hammer
Frame. Be careful not to drop it.
Disassembly of the Reverse Valve
1. Using a TorxR No. 27 drive wrench or bit, remove the
four Backcap Bolts (12)
2. Lift the Backcap off of the rear of the Housing.
3. Discard the Backcap Gasket (13) and replace it with a
new one when assembling the tool.
4. Use a hooked tool to remove the Reverse Valve (29)
from the reverse valve bushing. Set the Reverse Valve
aside on a clean bench.
5. Remove and discard the Reverse Valve O–ring (28).
Replace it with a new one when assembling the
Reverse Valve.
6. Use a flat, thin blade screwdriver to remove the
Reverse Lever Retaining Ring (17) and Reverse Lever
Spring (18) from the Reverse Lever (16).
7. Remove the Reverse Lever from the Backcap.
Disassembly of the Motor
1. Using a TorxR No. 27 drive wrench or bit, remove the
four Backcap Bolts.
2. Remove the Backcap, Motor Clamp Washer (19) and
Backcap Gasket from from the Housing and set them
aside on a clean bench. Discard the Backcap Gasket
and replace it with a new on when assembling the tool.
MAINTENANCE SECTION
3.
4.
5.
6.
7.
8.
Disassembly of the Throttle Mechanism
1.
2.
3.
4.
5.
General Instructions
1.
2.
3.
4.
5.
6.
12
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.
Place the assembled motor on a clean bench with the
rotor spline facing upward.
Remove the Front End Plate (26) and Cylinder (25).
Remove the Rotor (22) from the Rear End Plate (21).
Remove the Vanes from the Rotor.
Inspect all motor parts including the Front Rotor
Bearing (27) and Rear Rotor Bearing (20) and replace
all worn or damaged parts.
Unscrew and remove the Air Inlet Bushing (7).
Remove the Screen (6), Throttle Valve Spring (5) and
Throttle Valve (4).
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.
Withdraw the Trigger Assembly (3) from the Housing.
Remove the Retaining Ring (10), Exhaust Deflector
(11) and Muffler Element (9) from the Housing.
ASSEMBLY
Always press on the inner ring of a ball–type bearing
when installing the bearing on a shaft.
Always press on the outer ring of a ball–type bearing
when pressing the bearing into a bearing recess.
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.
Always clean every part and wipe every part with a
thin film of oil before installation.
Apply a film of O–ring lubricant to all O–rings before
final assembly.
Check every bearing for roughness. Sealed or
shielded bearings should never be cleaned. Work
grease thoroughly into every open bearing before
installation.