TM 55-2210-224-34
3-22. FIELD SHUNT CONTACTOR (cont)
ADJUSTMENT (cont)
Table 3-1. Measuring Contact Tip Overtravel
Overtravel
Gage Pin
New Contactor
Status
@A
@B
10/32
12/32
GO
NO GO
0.176
0.207
0.200
0.240
Old Contactor
9/32
13/32
GO
NO GO
0.160
0.223
0.180
0.260
Low Limit - Old Contactor (Old Tips)
7/32
NO GO
0.130
0.140
b. If the overtravel is insufficient, check for the following conditions:
(1)
Badly worn, bent, or incorrect tips
(2)
Bent stationary contact-tip support
c. If the overtravel is too high, check for the following conditions:
(1)
Bent or incorrect tips
(2)
Worn stop on the contact lever
(3)
Bent stationary contact-tip support
29. Measure tip break as follows:
NOTE
Make sure the contactor armature is against the stop when making the
measurement; otherwise, the reading will be false.
a. Measure the tip break (air gap) at the point of minimum spacing when tips are open.
b.
Tip break shall be 14/32 to 19/32 inch (11.11 to 15.08 mm) for worn contactor and 15/32 to 18/32 inch (11.90
to 14.28 mm) for new contactor.
N
E
W
T
I
P
S
3-75
