Numa Patriot 180, Инструкции по уходу и обслуживанию

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Page 2
09/19/16
Patriot
®
180
FUNCTIONAL DESCRIPTION
1. BACKHEAD
The backhead connects the hammer to the drill rod. It is threaded into the top end of
the case with double start threads and into the drill rod with a standard 8-5/8 API REG
thread. Wrench flats are provided for disassembling.
2. PIN
The pin aligns the feed tube assembly into the backhead. It is made of hardened
steel to insure long life.
3. CHECK VALVE
The check valve maintains pressure in the hammer when the air supply has been shut
off. The pressure in the hammer balances the hydrostatic pressure in the hole thereby
preventing contaminants from entering the hammer.
4. 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.
5. CHOKE
The interchangeable choke is located in the tip of the feed tube and is held in place
with a press fit. A set of two chokes is supplied with each hammer. By installing the
correct choke, the hammer can be fine tuned to the compressor package.
6. CHECK VALVE GUIDE
The check valve guide is seated in the feed tube, and maintains the proper location
of the check valve and check valve spring.
7. FEED TUBE
The feed tube supplies the main air into the chambers located in the piston. It is
connected to the backhead by the pin. The feed tube is designed with a long bearing
surface to maintain alignment in the backhead.