TM-9-1240-401-34-P

TELESCOPE MOUNT M146: M118A2 AND M118A3; TELESCOPE MOUNT M145: M145A1; PANORAMIC TELESCOPE: M117 AND M117A2; FIRE CONTROL QUADRANT: M15; PERISCOPE: M42

TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE MANUAL

JULY 1993

TM-9-1240-401-34-P - Page 127 of 590

TM9-1240-401-34&P

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Using a feeler gage, check the clearance between

the cross-level mechanism (61) and the rocker as-

sembly above the cross-level mechanism. Record

the reading for use during installation of the cross-

Ievel mechanism (61) later.

Loosen nut (62) until it is flush with the end of ta-

pered pin (63).

Tap nut (62) until sleeve bearing (64) and tapered

pin (63) disengage.

Remove nut (62), sleeve bearing (64), and tapered

pin (63) as a unit.

Remove two cap screws (65), two Iockwashers

(66), two cap screws (67), and two Iockwashers

(68). Discard Iockwashers.

Tilt cross-level mechanism (61 ) forward until it

clears rocker assembly and remove cross-level

mechanism (61).

Remove two clamping catches (69) by removing

two machine screws (70) and two Iockwashers (71)

for each clamping catch (69). Discard Iockwashers.

Remove plug (72), spring (73), and V-bearing (74).

Remove gib key (75) and, if necessary, headless

straight pin (76).

Remove two machine screws (77), two lock-

washers (78), cross-level mechanism knob (79),

and indicator (80). Discard Iockwashers.

Remove tapered pin (81), body hub (82), and flat

washer (83).

Remove setscrew (84) and setscrew (85).

Using adjustable spanner wrench, remove seat

(86).

Remove wormshaft assembly (87) from cross-level

mechanism (61).

If necessary for repair, remove three setscrews

(88) and three setscrews (89).

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