TM 5-3610-286-20
2-16.
Ink Fountain Guard Safety Limit Switch.
This task covers:
a. Test
b. Remove
c. Install
d. Aline
INITIAL SETUP
Tools
Personnel Required:
1 mm feeler gage
Electrician (MOS 35E20)
0.050 x 0.375 x 8 in. flat-tip screwdriver
No. 2 x 4 in. cross-tip screwdriver
22 mm open-end wrench
Multimeter
NOTE
This paragraph covers maintenance of the safety limit switch operated by the
inking fountain guard. There are other similar safety limit switches on the
printing press (table 2-2). These procedures are generally applicable to all
safety limit switches. All switches are wired in the same but their mountings
may vary,
a. Test. (figure 2-8)
(1) Loosen two screws (1) and open hinged cover (2).
(2) Loosen two cross-head screws (3) and tag and remove wires (4).
(3) Set multimeter to RX1 scale.
(4) Place one test lead on each screw terminal (3) from which lead was removed.
NOTE
Not all safety limit switches are normally closed. Continuity/no continuity may
be reversed depending on how switch contacts are wired (either normally
open, NO, or normally closed, NC).
(5) Depress plunger (5), meter should deflect full scale (open circuit). If not, replace
switch (para b.)
2-66
