Numa Champion 330, Инструкции по уходу и обслуживанию

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Champion
® ®
® ®
®
330
MANUFACTURER OF DOWN HOLE HAMMERS AND BITS
Page 11
05/12/17
HAMMER ASSEMBLY
•••••
Insert the bit bearing into the chuck end of the case. This should be a close slip fit.
Making sure the bearing makes contact with the shoulder provided for it in the case,
insert the snap ring into the groove at the chuck end of the bit bearing diameter.
•••••
Slide the piston into the backhead end of the case. Push the piston all the way to the
chuck end. The piston should ride in the case smoothly. Push the piston back to the
backhead end to facilitate the assembly of the feed tube assembly.
•••••
Install the feed tube assembly into the backhead end of the case, making sure it is firmly
against the shoulder in the case. It is easier if the feed tube end can be supported in
the piston ID at initial installation. This requires the piston to be at the backhead end of
the case prior to feed tube assembly installation. Due to close tolerances, caution is
advised when inserting the feed tube assembly. It should not be forced into the case.
•••••
Install the chuck bushing in the chuck. With the bit face down, place the chuck over
the top of the bit. Align the splines and lower the chuck completely onto the bit. Rotate
the chuck counterclockwise until the splines meet and insert the drive plates between
the chuck and bit splines. See Figure 2-3.
C330 Drive Plate Positioning as Viewed from Top
Figure 2-3
•••••
With the crane or lift truck and appropriate lifting device, set the hammer case
assembly in an upright position with the chuck end down. Install the belleville washers
in the backhead end on the feed tube assembly. See the stacking diagram on page
13 for proper installation. Assemble the backhead o-ring in the groove in the
backhead. Lift the backhead, place the thrust washer against the thread shoulder
and thread the backhead into the case. Prior to lifting the hammer by the backhead,
Drive Plate
•••••
Insert the check valve housing spacer.
•••••
Insert the check valve housing, containing the check valve, check valve spring.
•••••
Align the feed tube retainer, with the feed tube retainer o-rings installed, toward the
backhead and tap the feed tube retainer into the backhead until it seats against the
check valve housing.