Champion
®
®
®
®
®
330
MANUFACTURER OF DOWN HOLE HAMMERS AND BITS
Page 5
05/12/17
SECTION II
MAINTENANCE
DISASSEMBLY
•••••
Maintenance should be performed in a clean environment.
CAUTION
USE CAUTION WHEN HANDLING DOWN THE HOLE HAMMER PARTS. NUMA HAMMER
PARTS ARE MANUFACTURED FROM HARDENED, HEAT TREATED MATERIALS. DROPPING
OR STRIKING THESE PARTS MAY CAUSE SEVERE DAMAGE. STRIKING THE HAMMER
PARTS WITH HAMMERS, CROWBARS OR LIKE INSTRUMENTS WILL VOID THE WARRANTY.
•••••
Tools needed: hammer stand, 26" (660 mm) "J" or fork wrench (possibly incorporated
in the hammer stand), overhead crane or lift truck, pulldown visetong with a 28" (711
mm) diameter capacity or a self contained power wrench capable of 200,000 foot
pounds (27,624 KGM) of torque, 2" (51 mm) diameter brass rod or mild steel rod 3 to 5
feet (1 m to 1.5 m) long, snap ring pliers, a drift pin and several different sized
screwdrivers.
•••••
Clean the outside of the hammer. This will insure a good surface to clamp on.
•••••
Using an overhead crane or lift truck of appropriate capacity, place the hammer on a
hammer stand and secure it in the wrench. The chuck end can be held by the 26" (660
mm) flats, in the wrench. The backhead is also held in the 26" (660 mm) wrench. Place
the visetongs on the area of the case where the bit bearing is located when working on
the chuck end of the hammer. When working on the backhead end of the hammer,
place the chain vise on the area of the case where the feed tube housing in located.
Hammer Stand/Wrench Diagram
Figure 2-1
Pulldown Visetongs
Petol No. VTDA120
Force Direction Required:
15,000 - 25,000 lbs.
(6,800 - 11,400 Kg.)
Champion
330
Blocking to
height of stand
Hammer stand and wrench
combination, structural steel,
I-Beam, weld construction
bracing to suit.
