TM 1-1520-238-23
7-502.4
Change 7
7.130A. SURGE VALVE CLEANING – continued
7.130A.5. Cleaning
a. Clean surge valve components.
CAUTION
Do not use alcohol on rubber parts. Pre-
mature deterioration of parts may occur.
Clean all rubber parts with water only.
(1) Clean springs, covers, poppet, and guide as-
sembly with alcohol and allow to air dry. Use
alcohol (item 25, App F).
(2) Clean all passages and orifices.
NOTE
Later versions of the surge valve may
have two springs under the diaphragm.
Ensure to retain all removed parts for
reassembly.
(3) Clean small orifice in valve body and check
with an 0.020 INCH safetywire. Blow air
through passage to clean and remove any
debris.
(4) Check for clean mating surface between pop-
pet valve and seat. Seat must be smooth and
clean for valve to operate effectively.
(5) Clean orifice in screw and check for clear
passage.
(6) Flush and check orifice for open passage.
b. Clean surge valve filters (para 7.125).
7.130A.6. Inspection
a. Check removed and attaching parts for
cracks, dents, and scratches (para 7.114).
b. Check removed and attaching parts for corro-
sion (para 1.49).
GO TO NEXT PAGE
BLOW AIR
THROUGH PASSAGE
TO REMOVE DEBRIS
FLUSH AND INSPECT
ORIFICE FOR OPEN
PASSAGE
CLEAN ORIFICE AND CHECK
WITH 0.020 INCH WIRE
INSPECT DIAPHRAGM
FOR DAMAGE AND LEAKS
INSPECT
DIAPHRAGM
FOR DAMAGE
AND LEAKS
M04-5219-4
