19
MAINTENANCE SECTION
MAINTENANCE TOOLS
TOOL NUMBER
FOR ORDERING
TOOL NAME
FOR ORDERING
OPERATION
H02–119
Nozzle Ejection Arbor
Remove Nozzle (21) from the Barrel (17).
Always wear eye protection when operating or
performing maintenance on this tool.
Always turn off the air supply and disconnect the air
supply hose before installing, removing or adjusting
any accessory on this tool or before performing any
maintenance on this tool.
LUBRICATION
Each time a Series 2D, 3D, 4D or MDT3–EU Hammer is
disassembled for maintenance and repair or replacement
of parts, pour about 3 cc of Ingersoll–Rand No. 10 Oil in
the air inlet and operate the tool for 5 seconds to coat the
internal parts with oil.
Weekly, flush the Tool and lubricate immediately
afterwards as instructed in PLACING THE TOOL IN
SERVICE.
Loss of power and excessive air consumption may be due
to wear on the Piston (16) and the bore of the Barrel (17).
This can be determined by checking the Piston diameter at
each end and in the center with a micrometer. If the
diameter at the center is .003” greater than the diameter at
either end, it is proof that the Piston and Barrel are worn.
To correct, lap the Barrel and install an oversize Piston as
instructed below, under Installation of Oversize Piston.
OVERSIZE PARTS
The Piston (16), Nozzle (21) and Inlet Bushing (9) can be
furnished oversize as well as standard size. When prop–
erly installed, oversize parts renew the efficiency of the
Hammer as well as lengthen its life. See Installation of
Oversize Piston on Page 21.
DISASSEMBLY
General Instructions
1. Do not disassemble the tool any further than
necessary to replace or repair damaged parts.
2. Whenever 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 a
subassembly unless the removal of that part is
necessary for repairs or replacement.
4. Do not disassemble the tools unless you have a
complete set of new gaskets and O–rings for
replacement.
Disassembly of the Handle and Throttle
Mechanism
1.
Remove the Lock Spring (24A or 27) from the
Retainer (24 or 28).
2.
Using a vise with leather covered or copper covered
jaws, clamp the tool by the Barrel (17) with the
Handle (1) up.
3.
To remove the Throttle Lever ( 2 ), drive out the Roll
Pin ( 3 ) using a suitable pin punch.
4.
Unscrew the Inlet Bushing (9) and remove the Air
Strainer (7), Throttle Valve Spring (6), Throttle Valve
Ball (5) and Throttle Valve Plunger (4) .
Disassembly of the Barrel Piston and Nozzle
1.
With the Barrel clamped in the vise as above, use
two 3/4” wrenches and remove the four Nuts (20)
which secure the Handle to the Barrel. The Handle
can now be removed from the Barrel.
2.
If necessary, pull out Roll Pins (15). Remove the
Valve Seat (14), Valve (13), Valve Spacer (12),
Valve Cap (11) and Valve Sealing O–ring (10).
3.
Remove the Barrel from the vise and invert it to allow
the Piston (16) to slide out.
4.
Remove the Nozzle (21), using tool, Part No.
H02–119 Nozzle Ejection Arbor.
Support the end of the Barrel and press out the old
Nozzle.
During the life of the tool, it is unlikely that the
Collar (19) or Exhaust Deflector (22) will need to
be separated from the Barrel. Should this be
necessary, the following sequence should be
followed.
