Genesis Advanced Technologies GRXXX & manual Orifice Removal

Atlas & Yukon Second Stage

NOTE: The orifice is O-ring sealed and will remain inside the inlet coupling after performing the above step. The fol- lowing step must be performed correctly in order to remove the orifice without damaging its polished sealing edge.

8.After the orifice has been unthreaded from the inlet cou- pling, stand the inlet coupling on end with the orifice sealing edge facing up. Carefully insert the handle of the blunt probe (provided in the Select Kit) through the top of the inlet coupling, directly over the sealing edge of the orifice. Gently press the orifice out (see Fig. 3).

9.To avoid using a sharp tool that can damage the orifice, squeeze the O-ring(4) between thumb and forefinger to remove it from the orifice head. Discard the O-ring and do not reuse.

10.Closely examine the orifice with the use of a magnifier, checking for any scratches or other damage to the sealing edge and the groove that holds the O-ring (see Fig. 4). If any damage or wear is found, discard the orifice and do not attempt to reuse. If it is in reusable condition, set it aside on a soft surface to keep it isolated from metal parts.

11.While holding the bottom of the second stage secure with one hand, firmly grasp the cover ring(1) with the other, and turn the ring counter-clockwise to loosen and remove.

NOTE: If the cover ring cannot be removed by hand, it may be necessary to use the Rim Clamp (PN 22-680-200), to- gether with a bench-mounted vise. This Genesis specialty tool has been designed to prevent damage to the cover ring or the second stage during disassembly, but it must be used correctly, following the steps outlined below.

a.Identify the side of the Rim Clamp that contains the larger diameter shoulder, which is designed to hold the Atlas/ Yukon cover ring. Place the Rim Clamp between the jaws of a bench mounted vise with the larger diam- eter side facing straight up, and the split edge parallel with the vise jaws (see Fig. 5). Ensure that the top surface of the clamp rests slightly above or flush with the top surface of the vise jaws, and gently tighten the vise only until the clamp is held securely in place. Do not over-tighten or compress the clamp.

b.Place the second stage inside the clamp, with the cover ring facing down. Tighten the vise to compress the clamp, only as far as is needed to secure the clamp around the cover ring to prevent slippage.

Fig. 3 – Orifice Removal

Fig. 4 – Orifice Inspection

Fig. 5 – Genesis Rim Clamp

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