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 TM 55-1905-223-24-1
(b) Set up magnaglo tester for each method using instructions provided on tester.
(c) Apply wet bath solution to area being checked. Continu lly wet the area 'while applying voltage from
a
the magnaglo tester.
NOTE
An ampere turn is an electrical current of one ampere flowing
through the coil, multiplied by the number of turns in the coil.
(d) Use the 12 inch (305 mm) diameter coil (FIG. 4-11) supplied with the magnaglo tester for coil shot
method.
Coil Shot Amperage
(Ampere Turns)
MIN
400 dc or rectified ac
MAX
800 dc or rectified ac
Head Shot Amperage
(Ampere)
MIN
500 dc or rectified ac
MAX
700 dc or rectified ac
FIGURE 4-11.
Valve Magnetic Crack Check.
(e) Use black light supplied with the tester to crack check valve. Verify valves meet the acceptance
criteria
shown in FIG. 4-12.
NOTE
A broad fuzzy pattern will appear at the welded joint on the
exhaust valves. This is normal. If there is a distinct line in the
broad fuzzy pattern, the valve must be replaced.
4-14
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