Numa Champion 330, Инструкции по уходу и обслуживанию

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Page 6
Champion
® ®
® ®
®
330
MANUFACTURER OF DOWN HOLE HAMMERS AND BITS
05/12/17
CAUTION
THE ACCEPTABLE CLAMPING AREAS START 11-1/2" (292 MM) FROM THE CASE END, TO
AN ADDITIONAL 10" (254 MM) BEYOND THIS POINT ON BOTH THE CHUCK AND
BACKHEAD END OF THE CASE. PLACING THE VISETONGS ON THE AREA OF THE CASE
WHERE THE PISTON CYCLES CAN DISTORT THE CASE, RESTRICT PISTON MOVEMENT
AND VOID THE WARRANTY.
•••••
With the chuck secured in the fork wrench (see figure 2-1), loosen the joint by turning
the case with the visetongs. Remove the hammer from the wrench and turn the hammer
end to end in the hammer stand / wrench. With the backhead flats secured in the fork
wrench (see figure 2-1), loosen the joint by turning the case with the visetongs.
•••••
With the crane or lift truck, move the hammer into an upright position with the chuck end
down. With an adequate lifting device, lift and support the hammer while unscrewing
and removing the chuck, bit, bit retaining rings and bit retaining rings o-ring. After
setting the hammer down, and while lifting and supporting the backhead, unscrew and
remove the backhead from the case.
•••••
Remove the backhead o-ring and thrust washer from the backhead.
•••••
Remove the belleville washers from the top of the feed tube assembly.
•••••
Remove the thrust washer from the chuck.
•••••
Remove the drive plates from the chuck.
•••••
Remove the o-ring from the bit retaining rings.
•••••
Removal of the chuck bushing is not necessary for routine maintenance. If necessary,
position the chuck so the bit end is facing you. Locate the seam in the chuck bushing.
Insert a screwdriver into the slot in the middle of the seam and pry the chuck bushing
from the under cut. Remove the chuck bushing from the bit end of the chuck.
•••••
Using a 2" (51 mm) diameter brass rod, slide the piston against the feed tube assembly
and push the feed tube assembly out the backhead end of the case.
•••••
Slide the piston out the backhead end of the case.
•••••
Lay the backhead on its side. Using a broom handle, go through the API thread end of
the backhead and tap out the feed tube retainer, check valve housing, check valve,
checkvalve spring and check valve housing spacer. The check valve seat will remain
in the backhead. This part only acts as a spacer and does not need to be removed.