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3. Install o-ring (3) and o-ring (5) onto the piston (4). Closely
inspect the edges of new HP seat (6). One edge is sharp
and one edge has a bevel. Using your fingers, press the HP
seat into the piston with the beveled edge facing out. The
HP seat should be flush with the end of the piston. If you are
unable to press the HP seat into the piston, place the HP
seat on a flat, clean surface (beveled side down) and press
the piston shaft down over it.
4. Place the spring (7) into the first stage body (8). Lightly
lubricate the threads on the first stage body. Press the piston
(4) into the retainer cap (2) so that the piston head is seated
flat against the cap.
5. Insert the shaft of the piston (4) into the spring (7). Press
down on the retainer cap (2) and tighten the cap onto the
first stage body (8) until hand tight. Insert the pins on the
adjustable spanner wrench into the two holes on top of the
retainer cap and tighten until snug. The retainer cover (1) will
be installed after final testing.
6. Install o-ring (34) onto the shaft of the fill port pin (35) and
o-ring (32) onto the fill port cap (31). Set the fill port cap to
the side, it will be installed after final testing.
7. Install o-ring (32) onto the fill port (33). Insert the fill port pin
(35), o-ring side first, into the male-threaded end of the fill port.
8. Install the fill port (33) into the lower HP port on the first
stage body (8). Use a 9/16" socket and inch pound torque
wrench to apply 90 in-lbs (10.2 Nm) of torque to the fill port.
CAUTION:
To avoid damaging the fill port (33), do
not over torque.
Reassembly of Dial Pressure Gauge
NOTE: SEA units will either have a dial pressure gauge
(36) or pin style pressure gauge (37). Identify which
type the SEA being serviced utilizes and follow the
instructions accordingly.
9. Install o-ring (32) onto the pressure gauge (36). Screw
the pressure gauge into the upper HP port on the first stage
body (8) until hand tight. Use a 7/8" crowfoot and inch pound
torque wrench to apply 45 in-lbs (5 Nm) of torque to the
pressure gauge.
CAUTION:
Be careful not to damage the fill port (33) with
the crowfoot while torquing the pressure gauge (36).
11
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