TM 9-1240-400-34&P
Table 5-1. INITIAL INSPECTION--M137 TELESCOPE MOUNT (CONT)
ITEM NO.
ITEM T0 BE INSPECTED
PROCEDURE
Quadrant
Cant
Elevation
Angle
Correction Tolerance
(mils)
(mils)
(mils)
(mils)
500
177.8
96.1
0.5
800
177.8
180.5
1.0
1000
177.8
271.9
2.0
5
Elevation Assembly
Rotate elevation assembly knob. It must
turn
smoothly with less than 13.00 in.-lb (1.47 N-m)
torque. Backlash must not exceed 0.5 mil. With
elevation knob rotated through full range the line of
sight shall not deviate from plumb by more than 1.0
mil. With the mount elevated in 200 mil increments
between zero and 1200 mils, elevation error must
not exceed 1.0 mil.
6
Variable Resistor Knob
Rotate knob. It must turn smoothly with
less than
2.0 in.-lb (0.23 N-m) torque.
2.1
7
Level Bar Must be parallel to the plane of locating keyway
within 0.2 mil.
5-3
