The Norden Bomb Sight manual

G. Cardan

REASSEMBLY

A. Cardan

B. End Cover

C. Cardan

Locking

Nut

to support the cardan, or remove locking

in the gyro gudgeon

bearing and

insert steel

to support the weight of

cardan.

Loosen brackets holding wire to case of M-8 so

that end cover may

be removed.

Remove the three screws in end

cover and re-

move cover.

CAUTION:

Do not damage left cardan gudgeon bear-

Set maximum trail on cross trail knob, and ro-

tate sight stem counter-clockwise.

2. Lift cardan from gyro end and

tilt forward and

remove by slight movement to the left and up.

careful not to damage the right cardan gudgeon

bearing.

It is possible to remove the cardan and end

cover at the same time.

To do that the three end

cover screws are

removed and then the cardan is

grasped with right hand and tilted forward.

left hand

is placed

around the end cover and under

the leveling knobs.

Lift up and to the left and

remove cardan and then remove the end

Always stand

cardan on end or place on

table with the back edge of

resting on the

table.

Care must be exercised not to damage the

connecting rod and the mirror.

1. Hold cardan in both hands and place right car-

dan gudgeon bearing over the gudgeon.

2. Check to make sure

that the bell crank is

properly seated

C.T. carriage fork.

cardan and insert wedges between cardan

and case.

I. Replace end cover. Be certain that left car-

dan gudgeon

bearing is properly seated.

Replace

3 lower end cover screws.

3. Place wire under brackets and tighten screws:

4. Replace

flexible leads and reshape.

The leads

should

"S "

shape and should not touch

other or the

case or bail as the cardan is tilted

fore and

I. Replace and tighten right cardan gudgeon lock-

ing nut

with

3/8"

wrench.

2.

Tilt cardan fore and aft to check for freedom

of movement.