|
| |
TM5-4120-387-14
(1) Use a multimeter set on lowest OHMS scale to check for continuity
between cortacts I and M on L1 (connector P4) and contacts H and g on L2 (connec-
tor P4).
If continuity is not found, coil is open and must be replaced.
(2) Use multimeter to check for continuity between each contact in connec-
tor P4 and coil casing.
If continuity is found between either contact (I and M,
L1 or H and g, L2), the coil is grounded and should be replaced.
(3) If continuity checks are satisfactory, apply 28 volts dc from an
external power source across contacts I and M on L1 (connector P4).
Listen for a
sharp click when valve changes position.
If click is not heard, internal valve
problems are indicated and entire valve should be replaced.
(Go to para 5-19.)
(4) Repeat the above test on valve L2.
Apply 28 volts dc to contacts H and
g (P4).
Replace entire valve if click is not heard.
(Go to para 5-19.)
5-39
|
