Champion
®
®
®
®
®
330
MANUFACTURER OF DOWN HOLE HAMMERS AND BITS
Page 7
05/12/17
•••••
It is not necessary to remove the bit bearing for routine maintenance. If necessary, the
snap ring must be removed first. Using a large screwdriver and the slot provided in the
snap ring groove, pry one end of the snap ring up and out of the groove. Pull and twist
the snap ring toward the chuck end of the case, until it is clear of the groove. Using a
2" (51 mm) diameter rod, knock the bit bearing toward the chuck end of the case. The
bit bearing is a tight slip fit in the case. However, rust or corrosion may make it difficult
to move and a penetrating oil can be used to help with removing the bit bearing from
the case.
•••••
Disassembly of the feed tube assembly is not necessary for routine maintenance. If
necessary, tap on the choke end of the feed tube. This will cause the feed tube to
protrude from the feed tube housing. Grasp the feed tube and slide it out of the feed
tube housing. Slide the feed tube compression ring off the choke end of the feed tube.
Place the feed tube collar toward the work bench. Using a drift pin, tap the choke from
the feed tube pressing diameter. The choke will fall out of the collar end of the feed tube.
Using a small screwdriver, pick the two feed tube o-rings from the smallest bore of the
feed tube housing.
