Numa Champion RC300, Инструкции по уходу и обслуживанию

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04/21/20
Champion
®
RC300
FUNCTIONAL DESCRIPTION
1. BACKHEAD
The backhead connects the hammer to the drill rod. Backheads can be manufactured
to be compatible with several reverse circulation drill rod designs. Please contact your
distributor or regional salesperson for more information. Wrench flats are provided for
disassembly.
2. CONNECTOR PINS
The connector pins are located on the top of the backhead, in the wirth flange. These
pins allow air to flow into the hammer via the adaptor/drill rod.
3. CHECK VALVE SEAT
The check valve seat provides the sealing surface for the check valve and guides the
collection tube.
4. CHECK VALVE
The check valve maintains pressure in the hammer when the air supply has been
shut off. The check valve in the hammer balances the hydrostatic pressure in the hole
thereby preventing contaminants from entering the hammer.
5. CHECK VALVE SPRING
The check valve spring provides tension under the check valve to keep it closed. It is
compressed as the air is turned on.
6. COLLECTION TUBE
The collection tube extends from the backhead to the bit and transfers the collected
drill cuttings to the inner drill pipe of the reverse circulation drill rod. The collection tube
is designed to be easily replaced without removing the backhead from the drill.
7. COLLECTION TUBE HOUSING
The collection tube housing aligns the collection tube. Holes in the collection tube
housing provide the necessary porting supply air.
8. BELLEVILLE WASHERS
Two belleville washers sit between the collection tube housing and the feed tube
housing to keep the feed tube housing tight against the shoulder in the hammer.