FIG. 5-i
FIG. 5-j
FIG. 5-k
R-100
BALANCED PISTON FIRST STAGE REGULATOR
DISASSEMBLY /
ASSEMBLY
10.
Removal the piston stem o-ring (12)
located within the internal o-ring
groove of the main body (13), but
must be attempted using only the
proper tools and patience. View the
main body through the piston
entrance to locate the internal o-ring
groove. The piston stem o-ring (12)
seals against both the stem of the HP
piston (19) and the brass internal o-
ring groove within the main body.
Refer to
Figure 5-i
.
NOTE
Extreme care must be taken not to damage the brass sealing surface of the groove
when removing or installing this o-ring. Use only soft brass or plastic o-ring pick to
attempt this operation. Examine the o-ring upon removal and RECORD
REPLACEMENT. DO NOT attempt to reuse this o-ring.
11.
Remove the Yoke knob (1) and the
dust cap (3) from the yoke (2).
Inspect very thoroughly for cracks,
wearing, or distortion. Also check the
internal thread located on the yoke.
R E C O R D
R E P L A C E M E N T
I F
REQUIRED. Refer to
Figure 5-j.
12.
Remove and inspect the yoke for any
signs of distortion or cracking. If none
are present and the yoke shows no
signs of deterioration, it need not be
removed to service the first stage.
12.
To remove the yoke (2) from the
main body (13), we recommend
using a slotted flat bar tool or a 12”
adjustable wrench. Place the first
stage in a smooth-jawed vise, with
yoke facing up. Install the wrench or
flat bar tool onto the yoke retainer
(14). Using firm, steady force, rotate
the tool in a counterclockwise
direction until the yoke retainer nut
and yoke are removed.
See
Figure
5-k
Revised v1.0-2000
16
