Ingersoll-Rand MX Series, Maintenance Information

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Figure 1
26. If it is necessary to remove any of the latch parts from the
fronthead assembly, drive out the roll pin kit (23), then remove
the latch (2), plunger (18) and the plunger spring (29).
27. To remove the anvil bushing (15), use a screwdriver and pry the
anvil bushing retainer (32) out of the fronthead.
NOTICE
Make sure that the anvil bushing retainers (16) are removed
before removing the anvil bushing (15).
28. If equipped with flex handles (25) that require removal, unscrew
the flex handles from the housing (1). If damaged, remove the
flex handle connectors (33).
Assembly
1. If the piston seat (5) was removed, a new seat will have to be
pressed into the housing (1) from the fronthead end of the
housing.
2. After pressing the piston seat into the housing, install the piston
seat retainer (30).
3. Set the housing in a vertical position so that the fronthead end of
the housing is resting on the floor.
4. Install the piston (4), stem end first, into the backhead end of the
housing bore. The piston may require some initially line up before
dropping all the way into position.
5. The valve cover o-ring (330) is installed next.
6. Install new valve chest o-rings (315) into the grooves on the valve
chest assembly (7) O. D.
7. Install the valve chest assembly (7), stem end pointing up, into
the housing.
8. Install new valve chest o-rings (315) on the O. D. of the housing
plug (6).
9. If the filter (20) was removed from the housing plug, insert a new
filter. The filter should protrude from the bottom of the housing
plug 3/16 - 1/4 in. (4.8 - 6.4 mm).
10. Install the housing plug (6) into the housing, making sure to
lineup the slot in the plug with the slot in the side of the housing
bore.
11. Install a new backhead o-ring (305) onto the top of the housing
plug (6).
12. If the rubber plug (22) was removed, put a thin film of oil on a
new plug and insert into the cavity until flush with the top of the
hole.
13. Install the throttle valve spring (26) into the throttle valve hole in
the housing (1).
14. Install new throttle body o-rings (310) on the throttle valve
kit (11),
15. Install the throttle valve into the throttle valve body.
16. Insert the throttle valve kit (11) into the housing (1). Make sure
that the slot in the top of the throttle body lines up with the slot
in the housing (1) and the housing plug (6).
17. Place the throttle lever (10) into the grooves of the housing
plug (6) and throttle valve kit (11).
18. Install the backhead (3) onto the top of the housing and attach
with backhead bolts (205) and backhead washers (400). Torque
the bolts to 140 ft-lbs (190 Nm).
19. If the oil fill plug (21) was removed from the backhead (3), install
a new oil fill plug o-ring (300) and screw the plug back into the
backhead.
CAUTION
Clamp the housing firmly but carefully. The housing can be
cracked if the vise is over tightened.
20. Secure the housing (1) in a vise with soft jaws. Position the
housing with the handles pointing up.
21. Install a new connection cap o-ring (325) into the groove on the
air connection cap (13).
22. Install a new connection nipple o-ring (320) in the groove on
the air connection nipple (14). Install the air connection nipple
(14) through the air connection cap 13). Screw the assembled air
connection cap into the housing (1).
23. If the fronthead assembly was disassembled, perform the
following:
Install the anvil bushing (15) into the fronthead head end
of the fronthead (2), making sure to line up the slots on
the bushing O. D. with the holes through the sides of the
fronthead.
Install the plunger spring (29) and plunger (18) into the
plunger hole in the fronthead (2).
Line up the hole in the latch (17) with the hole in the
fronthead ear and install the roll pin kit (23).
Insert the anvil bushing retainers (16 into the fronthead holes.
Install anvil bushing retainer (32) into the fronthead (2).
24. Install spring seat (31) into the fronthead end of the housing (1).
25. Install the anvil bushing spring (27).
26. Install the second spring seat (31) into the fronthead, opposite
the latch end.
NOTICE
The anvil bushing retainers (16) will have to be held in place
while installing the fronthead into the housing.
27. The fronthead can now be installed into the housing (1). The latch
on the fronthead should be on the same side of the housing as
the air connection.
28. Install the fronthead bolt (200), fronthead washer (28) and
fronthead nut (500). Lubricate the bolt threads and torque the
bolt to:
MX60 – 250 ft-lb (339 Nm) (3/4in.)
MX60 – 240 ft-lb (325 Nm) (7/8in.)
MX90 – 375 ft-lb (508 Nm)
29. Install either the exhaust deflector (19) with a screw driver or
install the muffler(100) and retain with the muffler bolt (210) and
muffler bolt washer (400).
30. Install new handle sleeves (25) or the flex handles (25) if so
furnished.
a.
b.
c.
d.
e.