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TM 10-4930-246-13&P
(3)
Disassemble the hose end regulator. (Refer to figure 5-6.)
Piston assembly is under an initial spring load of approximately 65 psi. Use
care in disassembly to avoid serious injury to personnel and equipment.
NOTE
The piston assembly is composed of the outer piston (1), screw (2), Stat-O-
Seal (3) and inner piston (4).
(a)
Depress piston assembly using an arbor press or equivalent and remove retaining ring (5)
from housing (6).
(b)
Slowly release load from arbor press, allowing the piston spring (7) to push the piston
assembly out of housing (6). Remove piston assembly and piston spring (7).
NOTE
It is not necessary to separate the piston assembly parts unless replacing
part(s). If disassembly is required, complete step (c).
(c)
Remove screw (2) to separate the piston assembly. Discard screw (2)
(d)
Use a torque wrench to measure the force necessary to remove self-locking screws (8) and washers (9).
If the force to remove screws (8) is less than 1.5 in. lbs. (0.17
Nm), replace the screws during
assembly.
When seal retainer (10) is removed spring (11), ball (12) and O-ring (13) are
free to fall out and get lost. Work over a rag that will capture spring (11),
ball (12) and O-ring (13).
(e)
Remove seal retainer (10) by removing the four screws (8) and flat washers (9).
(f)
Remove remaining parts; quad ring (14), seal spacers (15), seal (16), O-rings (17), O-ring (13),
ball (12) and spring (11). Retain ball (12). Discard all other parts.
(g)
Teflon seal (18) and O-Ring (19) should only be removed if damaged. If removed replace both
during assembly.
(h)
Remove and discard outer piston seal (20) and O-ring (21) from housing (6).
NOTE
It is not necessary to remove the breather assembly (22) unless the filter or
screen is suspected of being clogged.
Change 1
5-11
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