MAC TOOLS AW7500 Instrucciones página 36

The Reverse Button (left) (40) must be pushed in
before the Trigger can be installed. Otherwise, the
Trigger will be damaged during installation.
4. Install the Trigger by pushing it into the handle until a
click is heard indicating that it is properly engaged.
Assembly of the Motor
When disassembling, assembling or pulling the
Motor, we recommend replacement of the Motor
Gasket (8).
1. Install the Motor Gasket in the Housing making sure
that the grooves in the tab of the Motor Gasket fit
around ridge in the Housing. See Dwg. TPD1336.
2. Install the Rear Rotor Bearing (4) into the rear of the
Cylinder (1).
3. Install the Rotor in the Cylinder and secure with the
Rear Rotor Bearing Retainer (7).
4. Install Vanes (5) in the slots in the Rotor (6).
5. Install the Front Rotor Bearing (3) into the Front End
Plate (2). Install the Front End Plate on the Cylinder
by pressing on the inner race of the front Rotor
Bearing until the Bearing is seated on the Rotor Shaft.
6. Install the Power Management Dial Seal (42) on the
Power Management Dial (41), and install the Dial in
the end of the Cylinder.
7. Insert the Motor Assembly into the Housing (20),
Power Management Dial end first.
Assembly of the Impact Mechanism
Bottom Hammer
half–round notch
on left;
bevels on bottom
MAINTENANCE SECTION
Installation
of Motor
Gasket
(Dwg. TPD1336)
Top Hammer
half–round
notch on right;
bevels on top
(Dwg. TPA1813)
1. Coat the Hammers (15) with a light film of Mac Tools
Pneumatic Grease.
2. Heavily coat the jaws of the Anvil (9) with Mac Tools
Pneumatic Grease.
3. Replace the Hammers in the Hammer Frame (13)
exactly as they were when you marked them prior to
disassembly.
4. Replace the Hammer Pins (14).
5. Examine the base of the Anvil (9) and note its
contour. While looking down through the Hammer
Frame, swing the top Hammer to its full extreme one
way or another until you can match the contour of the
Anvil. Enter the Anvil into the Hammer Frame and
through the first Hammer. Swing the bottom Hammer
in the opposite direction from the top Hammer and
maneuver the Anvil slightly until it drops into the
bottom Hammer. See Dwg. TPD1813.
Be sure to position the Top Hammer with the
half–round notch on the right and the bevels on the
top, and the Bottom Hammer with the half–round
notch on the left and the bevels on the bottom, as
shown in Dwg. TPA1813.
Assembly of the Air Wrench
1. Position the Motor Housing (20) in leather–covered
vise jaws with the splined shaft of the Rotor in a
horizontal position.
2. Place the assembled impact mechanism down onto
the splined hub of the Rotor.
3. Position the Hammer Case Gasket (19) against the
face of the Motor Housing.
Be sure that the small tab on outside surface of the
Gasket is located in line with the center of the
Trigger.
See Dwg. TPA1811.
4. Apply a thin film of Mac Tools Pneumatic Grease on
inside surface of the Hammer Case Bushing (17), and
place the Hammer Case (16) down over the Anvil and
against the Motor Housing.
Front of Housing
Gasket
Tab
5. Install the Hammer Case Screws (12) and tighten
them to 15 in–lb (1.7 Nm) torque.
36
(Dwg. TPA1811)