3-57. SOLENOID VALVE REPAIR (Contd)
6. Electrical solenoid (6)
Wipe clean with lint-free cloth.
Do not use solvent.
Compressed air used for cleaning purposes will not exceed 30 psi (207 kPa). Use only
with effective chip guarding and protective equipment such as goggles or shield, gloves,
etc. Failure to comply may result in injury to personnel.
Approved solvents may be flammable and will not be used near open flame. Use only in
well-ventilated area. Failure to comply may result in injury to personnel.
All parts except electrical
Clean with SD-3 solvent and
Refer to para. 3-6 for additional
dry with compressed air.
Inspect for cracks, breaks,
Discard any parts that are
excessive wear, and other damage.
damaged or worn.
Valve body (14)
a. Inspect valve seat for wear,
Discard if damaged or worn.
bonding separation, failure, and
b. Using suitable micrometer,
Discard valve body if width of
measure width of valve seat.
valve seat is less than 0.015 in.
10. Electrical solenoid (6)
Using multimeter, check
Discard electrical solenoid
resistance between long terminal
if resistance is not within
11. New O-ring seal (11)
Install on shutoff valve shaft (12).
Apply a light coat of lubricating
oil on O-ring seal (11) at installa-
12. Shutoff valve shaft (12)
a. Turn in valve body (14) until
it reaches bottom of bore.
b. Using depth micrometer set at
Distance should be 0.118 in.
0.118 in. (2.997 mm), check distance
(2.997 mm). If necessary, back out
from face of valve body (14) to tip of
shutoff valve shaft (12) until it is
shutoff valve shaft (12).
0.118 in. (2.997 mm) below valve
body (14) face.
c. Without moving shutoff valve,
Shutoff valve knob (15) acts as a
press on shutoff valve knob (15).
13. Valve disk (10)
Place in valve body (14) with
rubber side toward valve body (14).
14. New rectangular ring
Coat with lubricating oil and
seat in groove on valve body (14).