6. Remove Cylinder Dowel (26) and lay Motor Housing
on top of vise jaws with Front Rotor Bearing (25)
downward between jaws. Using a soft drift pin, tap
Bearing out of the Housing.
7. To remove Cylinder (23) and Front End Plate (24),
thread four 1/4"–20 thread socket head cap screws that
are at least 3" (75 mm) long into handle end of
Housing. Grasping Housing with installed screws
downward, sharply strike heads of screws on a sturdy
table to dislodge Cylinder. Cylinder should drop out of
Housing after a few impacts. If it does not, proceed as
follows:
The following procedure requires the use of heat.
Take all necessary precautions to prevent burns.
Carefully heat alternate sides of Housing
until it is very warm. Using thick, heavy gloves to
avoid being burned, grasp Housing and repeat
attempt to dislodge Cylinder.
8. Remove two Air Port Gaskets (28) and Air Port
Gasket Retainers (29) from Housing.
Disassembly of the Handle
1. Clamp Outside Trigger Handle Assembly in
leather–covered or copper–covered vise jaws with the
Straight Inlet (11) upward.
2. Using a wrench, unscrew and remove Inlet as well as
Air Strainer Screen (12) and Valve Spring (10).
3. Remove Throttle Valve Assembly (8) and Valve
Plunger (7) from Handle.
4. If Trigger (5) must be removed, use an arbor press to
push Trigger Pin (6) from the Handle and slide Trigger
out of slot in Handle.
ASSEMBLY
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 installing the bearing in a bearing recess.
3. Whenever grasping a tool or part in a vise, always use
copper–covered or leather–covered vise jaws.Take
extra care with threaded members and 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.
MAINTENANCE SECTION
Assembly of the Handle
1. Position Trigger (5) in Handle (1) and using an arbor
2. Clamp Handle in leather–covered or copper–covered
3. Coat Throttle Valve Plunger (7) with oil and insert it,
4. Install a new Throttle Valve Face (9) on Throttle
5. Encircle cone end of Air Strainer Screen (12) with
6. Install Straight Inlet (11) over Strainer Screen in
7. Remove Handle from vise and test Trigger. If Trigger
Assembly of the Motor
1. Lightly clamp Motor Housing (27) in leather–covered
2. Coat inside surface of Housing and outer edge of Front
3. Using a long tee hex wrench as an alignment pin, insert
4. Lubricate and insert a new fiber Air Port Gasket
5. Install an Air Port Gasket (28) in the air port against
6. Repeat Steps 4 and 5 to install remaining Gasket and
7. Coat outside of Cylinder (23) with a light film of oil
16
press, push Trigger Pin (6) full length into Handle so
that it captures Trigger.
vise jaws with air inlet opening upward.
rounded end leading, into the inlet hole in Handle.
Valve (8) and insert assembly, Valve Face leading, into
inlet hole in Handle.
large end of Throttle Valve Spring (10) and insert both
parts, Spring leading, into the inlet hole in Handle.
Handle and tighten Inlet between 20 and 25 ft–lb (27
and 34 Nm) torque.
functions properly, place assembled Handle aside. If it
does not function properly, disassemble Handle to
determine cause of problem.
or copper–covered vise jaws with handle end upward.
Excessive clamping pressure will distort the Motor
Housing and make motor installation extremely
difficult. Do not insert the hammer case end of the
Motor Housing more than 1" (25 mm) into the vise
jaws.
End Plate (24) with a light film of Ingersoll–Rand No.
50 Oil.
Front End Plate, copper face trailing, into Motor
Housing. Align dowel hole in End Plate with dowel
hole at the bottom of motor bore.
Retainer (29) in one of the air ports inside Motor
Housing.
Gasket Retainer with flat end of Gasket away from
Retainer.
Retainer in the other air port.
and using long tee hex wrench as an alignment pin to
align the holes in Cylinder with holes in Front End
Plate and Housing, insert Cylinder into Housing.