19
MAINTENANCE SECTION
3.
Hold the Hammer Frame firmly and, without
disturbing the Hammers, gently lift the Anvil,
simultaneously rotating it counterclockwise about 1/8
of a turn, from the Hammer Frame.
The twin Hammers will be free to slide from the
Hammer Frame when the Hammer Pins (66) are
removed. Do not to drop the Hammers.
4.
With the Anvil removed, lift out the two Hammer
Pins (66).
5.
Remove the twin Hammers.
Disassembly of the Reverse Valve
1.
Grasp the Reverse Lever (32) and withdraw the
Reverse Valve Assembly (29) from the Reverse Valve
Bushing (13).
2.
Tap out the Power Regulator Retaining Ball (41) to
release the Power Regulator Assembly (39).
Disassembly of the Motor
1.
Unscrew the four Housing Cover Cap Screws (43) and
remove the Housing Cover Assembly (44), Housing
Cover Gasket (50), and Motor Clamp Washer (51).
2.
While holding the Impactool over the workbench,
turn Impactool to bring the square drive upward. This
will allow the motor parts to slide out of the Motor
Housing Assembly (1). If the motor parts do not slide
out freely, gently tap the side of the Motor Housing
Assembly with a plastic hammer to jar them loose.
Often all of the motor parts except the Front End Plate
(58) and Cylinder (52) will slide out easily. Tap the
Motor Housing to remove the Front End Plate and
Cylinder.
3.
Inspect the Vanes (57) for wear. If a Vane is chipped or
otherwise damaged, replace the complete set.
4.
Check the bore of the Cylinder and the faces of the End
Plates for scoring. Replace any scored parts.
Disassembly of the Throttle Mechanism
For Model 2934P
1.
Removal of the Inlet Bushing (2) and Washer (3)
allows the Exhaust Deflector (4), Air Strainer Screen
(5), Throttle Valve Spring (6), Throttle Valve (7), and
Throttle Valve Plunger (9) to fall free of the Handle.
2.
Remove Exhaust Screen (10), Exhaust Silencer (11),
and Exhaust Deflector Seal (12).
3.
Use a Hooked Tool to remove the Throttle Valve Face
(8) from the Handle.
Trigger is under tension from the Trigger Spring
(17) and will fly out unrestrained if Retaining Pin is
removed abruptly.
4.
With the Impactool turned toward you, and the Trigger
(16) secured by an alternate means, use a Pin Punch to
drive out the Trigger Retaining Pin (18).
5.
Remove Trigger Bushing (19).
For Model 2940P
1.
Remove Exhaust Deflector (4) and Silencer (11).
2.
Removal of Silencer Cover Screws (38) allows
removal of Silencer Cover (37), Exhaust Diffuser (36),
and Exhaust Silencer (35).
3.
Place the tool on the workbench with the handle
pointing toward you and the square drive upward. Use
a punch to tap out the Throttle Valve Assembly
Retaining Pin (20) from the right to the left hand side
of the handle. Pull upward on the Trigger (27A) to
remove the complete Throttle Valve Assembly (21).
4.
Punch out the Trigger Retaining Pin (28) from the
Throttle Valve Bushing Assembly (22) to separate
Throttle Valve Assembly (21) from the Throttle Valve
Bushing Assembly.
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 pressing the bearing into a bearing recess.
3.
Whenever grasping a tool or part in a vise, always use
leather–covered or cooper–covered vise jaws. Take
extra care with threaded parts and housing.
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.
Assembly of the Throttle Mechanism
For Model 2934P
1.
With the Motor Housing Assembly on the workbench
and the handle to the left, press in the Trigger Bushing
(19) aligning the Trigger Retaining Pin hole in the
Bushing with the hole in the Handle.
2.
Place the Trigger Spring (17) on the Trigger (16).
3.
Push the Trigger/Spring into the Bushing, aligning the
slot in the Trigger with the Retaining Pin hole in the
handle and the bevel on the Trigger facing down the
Handle.
4.
Holding the Trigger in the Handle, drive the Trigger
Retaining Pin into the hole.
5.
Turn the Motor Housing Assembly handle up.
6.
Press the Throttle Valve Face (8) into the intake
opening in the Handle using a wooden dowel to seat
the Valve Face squarely and without damage.
7.
Put the Throttle Valve Plunger (9) into the intake
opening.
Summary of Contents for 2934P2
Page 13: ...MAINTENANCE SECTION 13 Dwg TPA1337 1...
Page 16: ...MAINTENANCE SECTION 16 SPLINE DRIVE ANVIL Dwg TPA1338...
Page 23: ...23 NOTES...
