Ingersoll-Rand Jackhamer JH40, Maintenance Information

Page: 2 / 8

2 51991057_ed3
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 o ff 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).
Lubrication
Each time a Series JH40 Jackhamer is disassembled for maintenance, repair or replacement of parts, inject approximately 3 cc of the appropriate
Ingersoll-Rand Rock Drill Oil into the air inlet of the tool before attaching the air hose.
•
•
•
•
Disassembly
General Instructions
Do not disassemble the tool any farther than necessary to replace
or repair damaged parts.
Do not remove any part that is a press fi t in or on a subassembly
unless the removal of that part is necessary for repairs or
replacement.
Do not disassemble the tool unless you have a complete set of
new gaskets and O-rings for replacement.
Never attempt major maintenance of the tool on the job. Always
send it to a repair shop.
Clean the exterior of the tool before disassembly.
Provide a clean work area for disassembling the tool.
Handle all parts carefully. Hardened parts can chip or break when
dropped onto a hard surface.
Place small parts in a clean box to prevent loss.
Do not allow dirt or chips from a soft drift or hammer to enter
the tool.
If necessary, use a rubber mallet to loosen the fronthead and
backhead.
Disassembly of the Tool
When clamping the Jackhamer, do not exert extreme pressure on
the tool. Parts can be cracked or damaged if the vise is tightened
too much.
Secure the drill fi rmly in a vise.
Remove the assembly rod nuts (2) and assembly rods (1) and
carefully pull the handle assembly and blower tube assembly
away from the drill.
Place the handle assembly on a clean work bench.
Unscrew the tube retainer (3), and pull the blower tube (5) out of
the handle (8).
If necessary, remove the O-Ring (4) from the tube retainer (3).
Examine the tube rubber (6), and if worn or damaged, discard
the rubber.
Remove the plug (18) and locating pin (17) from the handle. A
small hole is provided in the underside of the handle to assist in
removing the pin (17).
Use the lever (15) to pull the throttle valve (14) from the handle
(8).
NOTICE
The Throttle Lever is press fi tted in the Throttle Valve. Do not
remove the Lever from the Valve unless replacement of the Lever
or Valve Is necessary.
9. If necessary, remove the O-Rings (16) from the throttle valve (14).
10. Unscrew the air connection cap (24) and remove the air hose
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
1.
2.
3.
4.
5.
6.
7.
8.
connection (22).
11. If necessary, remove the O-Ring (23) from the air connection (22).
NOTICE
The Handle Bolt is designed with an identical Nut on each
end, however, the Nut (10) that seats the Lockwasher (12) Is
removable, while the nut on the opposite end (No Lockwasher)
is permanently assembled to the Handle Bolt. Do not attempt to
remove the permanently assembled Nut.
12. Unscrew the handle bolt nut (10). Remove the nut and
lockwasher (12).
13. Slide the handle grip washer (11) and handle grip (13) from the
handle bolt (9).
14. Remove the handle bolt with remaining handle grip washer (11)
and handle grip (13)] from the handle (8).
15. Pull the fronthead (58) with chuck and steel holder parts o ff the
piston stem bearing (51).
16. Place the fronthead assembly on a clean work bench.
17. Drive the chuck (54) and chuck driver (55) with chuck nut (56) out
of the fronthead assembly.
18. Clamp the chuck driver (55) in a vise.
NOTICE
The Chuck Nut has left-hand Threads.
19. The chuck nut (56) can be removed from the chuck driver (55) by
using a tool made from an old moil point. Cut o ff the oil piston
stem and weld a hex. nut to the stem.
20. Insert the fabricated tool in the chuck nut (56) and turn clockwise
to remove.
21. Tighten the steel holder bolt nuts (63) and remove the steel
holder bolt nut retaining rings (64).
22. Unscrew and remove the steel holder bolt nuts (63), and slide the
steel holder springs (62) o ff the steel holder bolts (61).
23. Slide the steel holder bolts (61) and steel holder (60) out of the
fronthead (58).
24. If worn, drive the steel holder bolt bushings (59) out of the
fronthead lugs.
25. Remove the mu ffl er cap (34) and slide the mu ffl er (33) from the
cylinder (35).
26. Insert a brass bar in the front end of the cylinder until it makes
contact with the end of the piston stem, and force the piston
to drive the valve chest assembly and rotation parts (ri fl e bar,
ratchet, pawls, etc.) out the rear end of the cylinder.
The rotation Pawls, Plungers, and Springs will fall out of the Ri fl e
Bar Head when the Head is clear of the Cylinder.