5.2 DISASSEMBLY OF THE SECOND STAGE
! WARNING !
NEVER tighten the hose fitting to the first stage with more than 40 in. lbs. (4.5 Nm)
of torque. The inlet hose fitting can be weakened by over tightening.
To view the complete parts list of the second stage, open the back cover of this manual.
5.2.1 Use the 6” and 8” adjustable wrenches to loosen the hose nut from the valve tube (21). Remove the
hose assembly (30) from the second stage. Inspect the hose assembly for any cuts or cracks, especially on
the hose at the metal ferrules. Remove and discard the O-rings from each end of the hose. Clean, rinse, and
blow-dry the interior bores of the hoses. Replace the hose assembly if any cuts or cracks are found.
5.2.2 Remove the mouthpiece (12) by cutting the mouthpiece tie (11) with side cutting pliers. Discard the old
mouthpiece tie. Examine the condition of the mouthpiece. Pay particular attention to the area on top just
behind where the old tie tightened. This is a prime area for small holes to develop. If the mouthpiece is in
good condition, it can be reused.
5.2.3 Remove the exhaust tee (13) from the case by pulling it back and off the top edge of the retaining flange
on the housing. Note: The exhaust tee can be removed more easily if hot water from a tap is run over and
through it for about 1 minute.
5.2.4 Before removing the exhaust valve (14) from the housing (10), bend the valve over as far as it will go
from the top, bottom, left, and right sides. If it fails to snap back quickly, and does not lie perfectly flat against
the housing exhaust grid, the valve should be replaced. If it does snap back satisfactorily, remove it by pulling
it out with your fingers. Inspect the sealing edges. If they appear smooth, and the locking tab on the nipple
is good, the valve can be reused.
5.2.5 Unscrew the cover ring (1) from the housing (10).
5.2.6 Remove the diaphragm cover (3) and the diaphragm (4) from the housing (10).
If the cover is difficult to remove you can try several methods to loosen it;
- Heat the 2nd stage body surrounding the Ring by running hot water from a tap over it. When the plastic is
hot, it will expand and loosen the threads.
- Rubber pads are available to use in the hand to loosen tight jar lids. These pads will allow you to get a
better grip on the Cover Ring (1)
- Zeagle sells a Cover Ring Removal/Purge Cover Aligning Tool.The part number is 347-1005 See photo 7.
15
Photo 7
Note: Tool may also be black plastic.
