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Product Safety Information
Failure to observe the following warnings, and to avoid these potentially hazardous situations, could result in death or serious
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injury.
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Read and understand this and all other supplied manuals before installing, operating, repairing, maintaining, changing accessories
on, or working near this product.
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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
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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
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:
1.
Never attempt major maintenance of the Paving Breaker on the
job; always send the Paving Breaker to a repair shop.
2.
Clean the exterior of the Paving Breaker before disassembly.
3.
Provide a clean work area for disassembling the Paving Breaker.
4.
Handle parts carefully. Hardened parts might chip or break if
dropped on a hard surface.
Disassembly
1.
If equipped with a Muffler, remove Screws (43, 44), Washers (41)
and Nuts (42); then remove Muffler Halves (45, 46).
2.
Place the Paving Breaker in a vise with the fronthead up.
Clamp the Paving Breaker housing in the area of the handles.
Clamp it firmly but carefully. The handle can be squeezed out-of-
round or cracked if the vise is overtightened.
3. Remove the Nut (19), Washer (35) and Bolt (18).
4. Pull the fronthead assembly (20) up to re-move it from the
Housing (11).
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
removed.
5. Remove the Paving Breaker from the vise and mount it with the
handle up.
6. Remove the two Roll Pins (3, 5) which retain the Throttle Lever (2).
7. The Throttle Lever (2) can now be used to unscrew the Housing
Plug (37) from the Housing.
The oiler plate can be re-moved from the housing plug by filling
the housing plug chamber full of oil and installing the oiler fill
plug. Pressure in the chamber will be generated when the oiler
fill plug is tightened causing the oiler plate to be pushed out of
the housing plug.
2
CAUTION
NOTICE
CAUTION
WARNING
5.
Place small parts in a clean box to prevent loss.
6.
Keep your hands and the Paving Breaker clean and free of dirt,
while assembling.
7.
Wipe a film of clean oil over the working parts as they are
assembled.
8.
Do not allow dirt or chips from soft drifts and hammers to enter
the Paving Breaker.
9.
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.
10.
If necessary, use a rubber mallet to loosen the fronthead and
backhead.
8. Remove the O-ring (7), Oiler fill Plug (40), and Oiler Plate (6) from
the Housing Plug (37).
9. Remove the O-ring (39) from the Oiler Plate (6). It is not necessary
to replace the filter in the oiler plate unless it is damaged or dirty.
It is not necessary to replace the filter in the oiler plate unless it
is damaged or dirty.
10. Remove the Valve Chest (8) by screwing a piece of 1/2- 13 UNC-2B
threaded rod into the top of the Valve Chest. Pull out the three
Washers (4) and Valve Chest (8).
11. If it is necessary to remove any of the air connection parts,
unscrew the air Connection Cap (29) and the Air Connection (27),
Throttle Pin (34), Valve (32) and Spring (31) will drop out.
12. Loosen vise so breaker can be rotated so the Valve (9), Valve
Cover (10) and Piston (17) fall out.
When loosening the vise, make sure the Paving Breaker is
supported to prevent it from falling.
13. If it is necessary to remove any of the latch parts, drive out the
Roll Pins (25, 26), then remove the Lever (22), Plunger (24) and
Spring (23) from the Fronthead (20).
14. If the Fronthead Bushing (21) should require removal from the
Fronthead (20), make a tool from an old moil point:
a.
Cut off the tip of the moil, making sure it is square.
b.
Leave about 8 in. (203 mm) of steel be-low the moil collar.
c.
Insert the fabricated tool (short end first) in the sleeve end of
the Fronthead (20), and with a Hydraulic Press, drive out the
Fronthead Bushing (21).
NOTICE
CAUTION
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