20
MAINTENANCE SECTION
Disassembly of the Collar
1.
Grip the Barrel in a vise equipped with soft jaws so
that the barrel is horizontal.
2.
Remove the four Bolts (23) from the Collar.
3.
The Collar can now be slid along the Barrel and
removed.
Disassembly of the Deflector
1.
The Exhaust Deflector (22) is a snap fit into a wide
groove around the Barrel. If it need s to be
removed., it must be pressed out of the groove using
a tube or similar of a suitable diameter to clear the
Barrel.
If the Deflector is not to be reused, it can be cut free
of the Barrel.
ASSEMBLY
General Instructions
1. Whenever grasping a tool or part in a vise, always use
leather–covered or copper–covered vise jaws. Take
extra care with threaded parts and housings.
2. Always clean every part and wipe every part with a
thin film of oil before installation.
3. Apply a film of O–ring lubricant to all O–rings before
final assembly.
Assembly of the Barrel, Piston and Nozzle
1.
If the Nozzle (21) has been removed it should now be
replaced. Stand the Barrel, tapered end up beneath a
press and locate the Nozzle with the lead in towards
the bore. Make sure that the nozzle sits square to the
bore. Use a soft mallet to start the nozzle and press
home.
The 19 mm Hex Nozzle is fully home when it is
approximately 7 mm (0.750”) below the end
surface of the Barrel.
For hexagonal nozzles, be sure to orient the nozzle
to the desired position.
2.
Reposition the Barrel in the vise so that it is clamped
vertically collar to the top. Lubricate the surface
lightly with Ingersoll–Rand No. 10 Oil and insert
Piston (16) in the bore, small end first.
3.
Assemble Valve components in the following
sequence by placing each over the Roll Pins (15) in
the Barrel face: Valve Seat (14), Valve (13) , Valve
Spacer (12) and Valve Cap (11).
4.
Lightly grease the Valve Sealing O–ring (10) to hold
it in place in its groove in the Handle (1) and replace
the Handle over the Valve Assembly.
5.
Align the bolt holes in the Handle with the holes in
the Collar (19) and replace the four Bolts (23).
Thread new Nyloc Nuts (20) on each bolt and tighten
down gradually and evenly to a torque of 40 ft/lbs
(54 Nm).
Make sure that the Valve Sealing O–ring is still in
place in its groove before tightening the nuts. The
handle can distort causing the tool to leak air if
the the tightening process is not done evenly and to
the correct torque.
Assembly of the Handle and Throttle Mechanism
1.
Align the pivot hole of the Throttle Lever (2) with the
corresponding pin hole in the Handle and secure in
place with Roll Pin (3). Use a pin punch to bury the
Pin below the Handle surface.
2.
Install the Throttle Valve Plunger (4) in the bore of
the Handle followed by the Throttle Valve Ball (5).
3.
Locate the small end of Throttle Valve Spring (6) on
the Throttle Valve Ball. Replace the Air Strainer (7)
with the raised portion inside the Spring. Secure
everything in place with the Inlet Bushing (9). Coat
the threads of the Inlet Bushing with a suitable thread
locking compound. Tighten the Bushing to a torque
of 35 ft/lbs (47 Nm)
Over–tightening of the Bushing may cause
stripping of the Bushing threads in the Handle.
4.
Install the Retainer (24 or 28) on the front of the
Barrel and secure in place with Locking Spring (24A
or 27).
