MAC TOOLS AW7500 Instrucciones página 35

3. When the Reverse Valve has been installed, rotate the
Reverse Valve so that the tab on the Reverse Valve is
at the rear of the Housing. See Dwg. TPD1332.
Reverse
Valve
If the orientation of the Reverse Valve is not
correct (tab facing the the rear of the Housing), the
Trigger (33) and the Forward and Reverse Buttons
(39) and (40) cannot be installed.
4. Install the Trigger O–ring (34) on the Trigger. Insert
the Trigger Assembly in the front of the Housing.
5. Rotate the Reverse Valve in either direction until an
ear comes up against the Trigger.
6. Look through the Housing from the rear. If the tab on
the Reverse Valve has been rotated to the left, install
the right Button in the Housing. When one Button
has been installed, push the Button in. This will rotate
the' Reverse Valve so that the other Button can be
installed. See Dwg. TPD1333.
Reverse
Valve
Tab
If the tab on the reverse Valve has been rotated to
the right, install the left Button. See Dwg. TPD1334.
Reverse
Valve
Reverse
Button
If the Forward/Reverse Buttons will not install
easily, move the Reverse Valve slightly higher in
the handle to provide better alignment with the
Buttons.
MAINTENANCE SECTION
Front of
Housing
Approx. 1/32"
(Dwg. TPD1332)
Rear of
Housing
Forward
Button
(Dwg. TPD1333)
Rear of
Housing
Tab
(Dwg. TPD1334)
7. After the Forward/Reverse Buttons have been
installed, remove the Trigger before proceeding with
installation of the throttle mechanism.
Assembly of Throttle Mechanism
1. Using an Inlet Bushing Screen Installation Tool,
install the Inlet Bushing Screen (24), screened end
first, in the bottom (hex end) of the Inlet Bushing
(23). Insert the rounded end of the tool in the cone
formed by the screen and tap the end of the tool to
secure the rim of the screen in the Bushing. See
Dwg. TPD1473.
Inlet Bushing Screen Installation Tool
2. Install the Inlet Retainer Clip (25), Inlet Bushing Seal
(27), Tilt Valve Spring (28), Tilt Valve (29), Tilt Valve
Seat (30) and Tilt Valve Seat Support (31).
The Tilt Valve Seat Retainer (32) must be properly
installed in the groove in the Inlet Bushing (23). To
check for correct installation of the Retainer, insert
a pin into one of the holes in the Retainer and
rotate the Retainer. A correctly installed Retainer
will rotate freely but with some resistance in the
groove of the Inlet Bushing. An incorrectly
installed Retainer will pop out of the Inlet Bushing
when the Retainer is rotated.
Do not use compressed air to check installation of
the Tilt Valve Seat Retainer or Inlet Bushing
Screen unless the entire Inlet Bushing Assembly is
installed in the tool with the Hammer Case
installed and properly secured to the Motor
Housing. Failure to do so could result in injury.
Install the Tilt Valve Seat Retainer.
When re–installing the Inlet Bushing Assembly,
pull the Trigger (33) outward and make sure that
the Reverse Button (40) is depressed before
snapping the Inlet Bushing Assembly back into the
Housing.
3. Install the Inlet Bushing Assembly by pushing it into
the hole in the Housing until you see and hear the tabs
on Inlet Retainer Clip snap into place through the
slots in Housing handle.
35
(Dwg. TPD1473)