Page 10
Champion
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330
MANUFACTURER OF DOWN HOLE HAMMERS AND BITS
05/12/17
O-RINGS
•••••
Inspect for damage such as cracks and deformations.
•••••
Replace if necessary.
THRUST WASHERS
•••••
Inspect for damage such as cracks and deformations.
•••••
Replace if necessary.
GENERAL ASSEMBLY INSTRUCTIONS
•••••
Assembly should be performed in a clean environment.
•••••
All parts should be cleaned thoroughly and wiped dry before assembly.
•••••
Oil all parts by hand using Rock Drill Oil (see table 5-1 on page 16) to insure easy
assembly.
•••••
Coat all thread connections and thrust washers with a thread compound to allow joints
to thread easily.
FEED TUBE ASSEMBLY
•••••
Install the feed tube o-rings in the two grooves located in the smallest inside diameter
of the feed tube housing.
•••••
With the smaller diameter of the choke toward the collar end of the feed tube bore, slide
the choke all the way to the pressing diameter. Using a long drift pin, tap the choke into
the pressing diameter.
•••••
Using the piston as a fixture, place the smallest diameter of the feed tube housing
against the top of the piston, lining up the bores. Put the feed tube compression ring over
the feed tube. Insert the choke end of the feed tube into the feed tube housing. Slide
the feed tube into the feed tube housing until the collar rests against the housing
shoulder. Remove the assembly from the piston.
CHECK VALVE ASSEMBLY
•••••
Place the backhead on its side. Install the check valve seat o-rings around the check
valve seat.
•••••
Align the check valve seat into the backhead. Using a large plastic rod and hammer,
tap the check valve seat into the backhead until the check valve seat is seated against
the shoulder inside the backhead.
