Ingersoll-Rand 1720B series, 1720P Series Instructions Manual
16601619
September 2009
Air Impact Wrench
1720B and 1720P Series
Maintenance Information
Edition 2
Save These Instructions
2 16601619_ed2
WARNING
Always wear eye protection when operating or performing maintenance on this tool.
NOTICE
NOTICE
NOTICE
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).
Lubrication
Each time a Series 1720B or 1720P Air Impact Wrench is disassembled
for maintenance and repair or replacement of parts, lubricate the
tool as follows:
Work approximately 12 to 15 cc of Ingersoll Rand No. 170 Grease
1.
into the impact mechanism, particularly around the Hammer Pins
(37 or 39), Hammer (38 or 40), Hammer Frame (36 or 38), Anvil
(39 or 41) and inside the Hammer Case Bushing (32 or 34).
Work some Ingersoll Rand No. 170 Grease into the Rear Rotor
2.
Bearing (18 or 20) and Front Rotor Bearing (27 or 28).
Inject approximately 4 cc of Ingersoll Rand No. 170 Grease into
3.
the Grease Fitting (10 or 12).
Wipe a thin lm of Ingersoll Rand No. 50 Oil on the
4.
Rotor (21 or 27), Vanes (22 or 24), Reverse Valve (13 or 15), Rear
End Plate (19 or 21), Front End Plate (25) and the bore of the
Cylinder (23).
Use Ingersoll Rand No. 50 Oil for lubricating the motor. Inject
5.
approximately 1 to 2 cc of oil into the air inlet before attaching
the air hose.
Disassembly
General Instructions
Do not disassemble the tool any further than necessary to replace
1.
or repair damaged parts.
Whenever grasping a tool or part in a vise, always use
2.
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.
Do not remove any part which is a press t in or on a subassembly
3.
unless the removal of that part is necessary for repair or
replacement.
Do not disassemble the tool unless you have a complete set of
4.
new gaskets and O-rings for replacement.
Model 1720B
Disassembly of the Air Impact Wrench
Clamp the handle of the tool in leather-covered or
1.
copper-covered vise jaws with the square driver upward.
Unscrew and remove the four Hammer Case Cap Screws (35).
2.
While lightly tapping on the end of the Anvil (41) with a plastic
3.
hammer, lift o the Hammer Case (33) and remove the Hammer
Case Gasket (32).
Grasp the Hammer Frame (38) and carefully lift o the entire
4.
impact mechanism, making certain not to drop the two Hammer
Pins (39).
Disassembly of the Impact Mechanism
Set the mechanism, driver end up, on the workbench. Using a felt
1.
tipped pen, mark one end of the Hammer (40) “” with the arrow
pointing upward.
With the mechanism sitting upright on the workbench, slowly
2.
rotate the Anvil (41) 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 (38) rmly and, without disturbing the
Hammer, gently lift the Anvil from the Hammer Frame.
4. With the Anvil removed, lift out the two Hammer Pins (39).
The Hammer is now free to slide from the Hammer Frame.
Be careful not to drop it.
Disassembly of the Reverse Valve
Unscrew the Reverse Valve Knob Screw (18) and remove the
1.
Reverse Valve Knob (17).
This Screw is installed with a suitable thread- locking compound.
You may have to heat the Screw slightly to loosen it.
2. While slowly rotating the Reverse Valve (15), withdraw it from the
reverse valve bushing in the Motor Housing.
Disassembly of the Motor
Grasp the Motor Retainer (31) and lift it from the Motor
1.
Housing (1).
Lift the Rear Hammer Frame Washer (37) and the two Motor
2.
Clamp Washers (30) from the front of the motor.
Grasping the spline of the Rotor (27), carefully lift the assembled
3.
motor from the Motor Housing.
The End Plate Dowel (26) will be free to move when the Front End
Plate (25) clears the Housing. Do not lose it.
4. Remove the Rear End Plate Gasket (22).
5. Remove the Motor Housing from the vise.
6. Slide the Front End Plate (25) and Front Rotor Bearing (28) from
the Rotor.
7. Remove the Cylinder Dowel (29), Cylinder (23) and Vanes (24)
from the Rotor.
8. Using snap ring pliers, remove the Rear Rotor Bearing Retainer
(19) and slide the Rear End Plate (21) and Rear Rotor Bearing (20)
from the Rotor.
9. If the Front Rotor Bearing or Rear Rotor Bearing requires
replacement, press it from the End Plate with an arbor press.
Disassembly of the Throttle Mechanism
Unscrew the Air Inlet Bushing (9) and remove the Air Strainer
1.
Screen (8), Throttle Valve Spring (7), Throttle Valve Assembly (5)
and Throttle Valve Plunger (4).
Unscrew the four Exhaust Deector Screws (14) and remove all of
2.
the muer parts.
Model 1720P
Disassembly of the Air Impact Wrench
Clamp the handle of the tool in leather-covered or copper-
1.
covered vise jaws with the square driver upward.
Unscrew and remove the four Hammer Case Cap Screws (33).
2.
While lightly tapping on the end of the Anvil (39) with a plastic
NOTICE
NOTICE
NOTICE
NOTICE
NOTICE
3.
hammer, lift o the Hammer Case (31) and remove the Hammer
Case Gasket (30).
Grasp the Hammer Frame (36) and carefully lift o the entire
4.
impact mechanism, making certain not to drop the two Hammer
Pins (37).
Disassembly of the Impact Mechanism
Set the mechanism, driver end up, on the workbench. Using a felt
1.
tipped pen, mark one end of the Hammer (38) “” with the arrow
pointing upward.
With the mechanism sitting upright on the workbench, slowly
2.
rotate the Anvil (41) 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 (38) rmly and, without disturbing the
Hammer, gently lift the Anvil from the Hammer Frame.
4. With the Anvil removed, lift out the two Hammer Pins (37).
The Hammer is now free to slide from the Hammer Frame.
Be careful not to drop it.
Disassembly of the Reverse Valve
Unscrew the Reverse Valve Knob Screw (16) and remove the
1.
Reverse Valve Knob (15).
This Screw is installed with a suitable thread locking compound.
You may have to heat the Screw slightly to loosen it.
2. While slowly rotating the Reverse Valve (13), withdraw it from the
reverse valve bushing in the Motor Housing.
Assembly
General Instructions
Always press on the inner ring of a ball-type bearing when
1.
installing the bearing on a shaft.
Always press on the outer ring of a ball-type bearing when
2.
pressing the bearing into a bearing recess.
Whenever grasping a tool or part in a vise, always use leather-
3.
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 lm of oil
4.
before installation.
Apply a lm of O-ring lubricant to all O-rings before nal
5.
assembly.
Model 1720B
Assembly of the Throttle Mechanism
Fold the Exhaust Silencer (11) in the shape of an ”S” or a ”fan
1.
fold” along the partially cut lines and install it in the rectangular
opening in the bottom of the Motor Housing (1).
Install the Exhaust Deector Gasket (13) on the rim of the
2.
opening.
Place the Exhaust Deector (12) over the Gasket and after
3.
applying Loctite (R)* No. 601 to the four Exhaust Deector
Screws (14), secure the Deector with the Screws. Tighten each
Screw between 20 and 25 in-lb (2 and 3 Nm) torque.
Apply a thin coat of O-ring lubricant to the Throttle Valve Face (6)
4.
and install it on the Throttle Valve (5).
* Product of ND Industries
Disassembly of the Motor
Grasp the Motor Retainer (29) and lift it from the Motor
1.
Housing (1).
Lift the Rear Hammer Frame Washer (35) and the two Motor
2.
Clamp Washers (28) from the front of the motor.
Grasping the spline of the Rotor (21), carefully lift the assembled
3.
motor from the Motor Housing.
The End Plate Dowel (26) will be free to move when the Front End
Plate (25) clears the Housing. Do not lose it.
4. Remove the Rear End Plate Gasket (20).
5. Slide the Front End Plate (25) and Front Rotor Bearing (27) from
the Rotor.
6. Remove the Cylinder Dowel (24), Cylinder (23) and Vanes (22)
from the Rotor.
7. Using snap ring pliers, remove the Rear Rotor Bearing
Retainer (17) and slide the Rear End Plate (19) and Rear Rotor
Bearing (18) from the Rotor.
8. If the Front Rotor Bearing or Rear Rotor Bearing requires
replacement, press it from the End Plate with an arbor press.
9. Remove the Housing from the vise.
Disassembly of the Throttle Mechanism
Unscrew the Inlet Bushing (8) and remove the Exhaust Deector
1.
(7), Throttle Valve Spring (6) and the Throttle Valve (3).
The Trigger (2) will be free to fall out of the Housing when the
Throttle Valve is removed. Do not lose it.
2. If the Throttle Valve Seat (5) 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.
3. Remove the two Housing Plate Screws (11) and the Housing
Plate (9) if the Housing Plate Gasket (10) needs to be replaced.
5. Install the Throttle Valve on the small end of the Throttle Valve
Plunger (4) and insert the Plunger and Valve, Plunger rst, into
the air inlet chamber of the housing.
6. Put the small end of the Throttle Valve Spring (7) over the trailing
end of the Throttle Valve. Place the Air Strainer Screen (8) so that
it sits within the coils of the Spring and install the Air Inlet
Bushing (9). Tighten the Inlet Bushing between 50 and 60 ft-lb
(68 and 81 Nm) torque.
Assembly of the Reverse Valve
After applying O-ring lubricant to the Reverse Valve Seals (16),
1.
install them in the undercuts in the reverse valve bushing. Make
certain they are properly seated.
Dampen the Reverse Valve (15) with light oil. With the tool in an
2.
upright position, and while facing the handle end of the tool,
insert the Reverse Valve from left to right into the reverse valve
bushing.
Place the Reverse Valve Knob (17) on the end of the Valve and,
3.
after applying a suitable thread-locking compound to the Reverse
Valve Knob Screw (18), fasten the Knob to the Valve with the
Screw. Tighten the Knob Screw between 5 and 6 ft-lb
(6.75 and 8.15 Nm) torque.
Assembly of the Motor
Using a sleeve that will contact only the outer ring of the bearing,
1.
press the Front Rotor Bearing (28) into the Front End Plate (25)
and the Rear Rotor Bearing (20) into the Rear End Plate (21).
Slip the Front End Plate and Bearing over the splined hub of the
2.
Rotor (27).
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