Ingersoll-Rand MX Series, Maintenance Information

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Product Safety Information
WARNING
Failure to observe the following warnings, and to avoid these potentially hazardous situations, could result in death or serious
injury.
Read and understand this and all other supplied manuals before installing, operating, repairing, maintaining, changing accessories
on, or working near this product.
Always wear eye protection when operating or performing maintenance on this tool. The grade of protection required should be
assessed for each use and may include impact-resistant glasses with side shields, goggles, or a full face shield over those glasses.
Always turn off the air supply, bleed the air pressure and disconnect the air supply hose when not in use, before installing, removing
or adjusting any accessory on this tool, or before performing any maintenance on this tool or any accessory.
Note: When reading the instructions, refer to exploded diagrams in parts Information Manuals when applicable (see under Related Documentation
for form numbers).
Maintenance
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General Instructions
To ensure maximum life and top performance of the equipment, it
is necessary that the maintenance be made before serious damage
occurs. It is important to be cautious when performing any service
work. A general knowledge of the system and/or components is
important before the removal or disassembly of any components.
The following is a list of basic precautions that must always be
observed:
Never attempt major maintenance of the paving breaker on
the job; always send the paving breaker to a repair shop.
Clean the exterior of the paving breaker before disassembly.
Provide a clean work area for disassembling the paving
breaker.
Handle parts carefully. Hardened parts might chip or break if
dropped on a hard surface.
a.
b.
c.
d.
Place small parts in a clean box to prevent loss.
Keep your hands and the paving breaker clean and free of dirt,
while assembling.
Wipe a film of clean oil over the working parts as they are
assembled.
Do not allow dirt or chips from soft drifts and hammers to
enter the paving breaker.
With the exception of pressed-in parts, all the parts should
fit together easily. If excessive force is required, the part is
probably cocked and should be removed and realigned.
If necessary, use a rubber mallet to loosen the fronthead and
backhead.
e.
f.
g.
h.
i.
j.
Disassembly
1. Set the breaker vertically on the floor.
2. If equipped with a muffler, remove bolt (210) and washer (400).
Slide the muffler off of the housing (1).
3. Remove the backhead bolts (205) and the backhead washers
(400) from the housing (1). Lift the backhead (3) off the housing.
4. If damaged, remove the oil fill plug (21) from the backhead (3),
and the oil fill plug o-ring (300).
5. Remove the throttle lever (10) from the housing plug (6).
6. Remove the backhead o-ring (305) from the housing plug (6).
7. Using a pair of adjustable pliers, pull the housing plug (6) out of
the housing bore.
8. Remove the housing plug o-rings (315) from the housing plug.
9. If damaged or dirty, remove the filter (20) from the housing
plug (6).
10. Using the adjustable pliers, remove the valve chest assembly (7)
from the housing bore.
11. Remove the valve chest o-rings (315) from the valve chest.
12. Remove the valve cover o-ring (330) from the housing bore.
13. To remove the throttle valve kit (11), use adjustable pliers and
pull the throttle valve kit from the housing.
14. Remove the throttle body o-rings (310) from the throttle valve
kit (11).
15. Remove the throttle valve spring (26) from the housing.
16. If the handle sleeves (25) need replacing, remove them from the
housing.
17. Although there should never be a need to, the rubber plug (22)
may be removed by inserting a screw driver between the plug
and the hole bore and prying the plug out.
18. If it becomes necessary to remove any of the air connection parts,
unscrew the air connection cap (13) from the housing (1). Slide
the air connection nipple (14) back through the cap. If damaged,
remove o-rings (320 & 325).
19. If required, use a screw driver to pry the exhaust deflector (19)
out of the housing (1).
20. Carefully lay the housing horizontally on the floor. From the
fronthead end, tilt the housing so that the piston will come out of
the backhead end of the housing. Remove the piston (4) from the
housing.
NOTICE
A lifting device is recommended for lifting the paving breaker
and putting it into a vise.
21. Position and secure the paving breaker in a vise horizontally.
CAUTION
Clamp the Paving Breaker housing in the area of the exhaust.
Clamp it firmly, but carefully. The housing can be cracked if the
vise is over tightened.
22. Remove the fronthead bolt (200), fronthead washer (28) and
fronthead nut (500) which retain the fronthead to the housing.
NOTICE
The fronthead assembly is a tight fit in the housing bore. It may
be necessary to drive a wedge into the housing slot to open the
housing bore enough to allow the fronthead assembly to be
easily removed.
23. Remove the fronthead assembly (2) from the housing (1).
24. Remove the anvil bushing spring (27) and the spring seat (31)
from the fronthead end of the housing (1).
25. If damaged, the piston seat (5) may be removed by:
Using a hacksaw, place the saw into the slot in the fronthead
end of the housing (1). Cut the piston seat retainer (30). Rotate
the retainer with a screwdriver and saw the retainer again.
Remove the retainer. Refer to Figure 1.
The piston seat (5) is pressed into the housing (1), so the seat
will have to be pressed out. Remove the seat through the
fronthead end of the housing.
a.
b.