ARO PG087A-A5 Manuale dell'operatore - Pagina 9
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Stampa la paginaMAINTENANCE SECTION
DISASSEMBLY
General Instructions
1. Do not disassemble the tool any further than necessary
to replace or repair damaged parts.
2. When grasping a tool or part in a vise, always use
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.
3. Do not remove any part which is a press fit in or on an
assembly unless the removal of that part is necessary
for repairs or replacement.
4. Do not disassemble the tool unless you have a
complete set of new gaskets and O-rings for
replacement.
Disassembly of the Impulse Mechanism
1. Use a pointed probe to push the Spring Seat (58)
against the Retaining Sleeve Spring (57). While the
Spring is compressed, use another pointed probe or
thin blade screwdriver to remove the Retaining
Ring (59). Lift the Spring Seat, Spring and Bit
Retaining Sleeve (56) off the Drive Shaft (44) and
remove the Bit Retaining Ball (55).
2. Using snap ring pliers, remove the Retaining Sleeve
Spring Stop (51) from the Drive Shaft.
3. Remove the Rubber Housing Boot (60).
4. Using copper-covered vise jaws, carefully grasp the
flats of the Mechanism Cover (53) with the output end
of the Drive Shaft downward.
5. Using an adjustable wrench, unscrew the Motor
Housing Assembly (1) from the Mechanism Cover.
This is a
left-hand
thread,
rotate the Motor Housing
clockwise
to remove it. (Refer to Dwg. TPD1264.)
6. Lift the assembled motor off the Mechanism Cover
and pull the mechanism assembly out of the Cover.
Remove the Bushing Spacer (52).
7. Using a 1.5 mm hex wrench, rotate the Torque
Adjustment Screw (34) clockwise until the Screw
stops. Rotate the Screw counterclockwise until it stops
in new style Liner Housings. Do not rotate the Screw
more than 3-l/2 turns counterclockwise in old style
Liner Housings or the Screw will fall out of the
Housing.
8. Using the special Tee Wrench furnished in the Tool Kit
(Part No. lOOPQ-99), remove the Oil Plug (32) and
Oil Plug Seal (33).
9. With the oil plug opening downward over a container,
rotate the Drive Shaft to purge the fluid from the
mechanism.
10. Grasp the flats of the Housing Assembly (31) in vise
jaws with the output end of the Drive Shaft downward.
11. Insert the pins of the spanner plug from the No.
lOOPQ-99 Tool Kit into the two holes in the Housing
Cap (37). Using a wrench on the plug, unscrew and
remove the Housing Gap from the Housing Assembly.
Refer to Dwg. TPD1267.
-
SPANNER PLUG
COUNTERCLOCKWISE
TO LOOSEN
(Dwg. TPD1267)
12. Stand the disassembly arbor from the Tool Kit, large
end downward, on a workbench or the table of an
arbor press. Insert the output end of the Drive Shaft
into the central opening and either tap the Housing
downward off the components or use the pressing
sleeve in the Kit to press the Housing downward off
the components. Refer to Dwg. TPD1268.
TAP EDGE LIGHTLY
WITH BRASS HAMMER
OR USE PRESSING
SLEEVE FROM TOOL
HOUSING
KIT
DISASSEMBLY
ARBOR
FROM TOOL KIT
(Dwg. TPD1268)
13. Disassemble the components of the mechanism in the
sequence shown in Drawing TPA1609 on Page 5.
Disassembly of the Motor
1. Grasp the Motor Housing (1) in vise jaws with the
shaft of the Rotor (25) upward.
2. Insert the pins of the end plate spacer spanner into the
holes in the Front End Plate Spacer (30). Using a
wrench, unscrew and remove the Spacer. This is a
left-hand
thread;
rotate the wrench
clockwise
to
remove the Spacer. Refer to Dwg. TPD1269.
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