GE AMX 4+, Техническое руководство

Страница: 66 / 132

4-18
Counterweight Balancing
The column assembly trim cover must be removedfrom top of column assemĆ
bly as shown in Section 4-1.
1. Secure the collimator handswitch closedwith a tyĆwrap or piece of tape to enerĆ
gize the vertical column brake (as well as all other brakes andlatch solenoid).
2. With all hardware in place, check the force required to move the tube/arm assemĆ
bly upward and downward. If the force needed to move it up is equal to the force
needed to move it down, the vertical column is balanced. Proceed to Step 5.
3. If the vertical moving forces are unequal, eight oz. (0.23 kg) counterweights (part
number 46-279784P1) should be added or removed (approximately four are inĆ
stalledat the factory).
a. Move the tube/arm to its lowest possible position. This will raise the counterĆ
poise mass andcounterweight to the top of the vertical column where the
counterweight can be accessed.
b. Loosen andremove the two locknuts andwashers that holdthe counterĆ
weights to the counterpoise.
c. Add or remove counterweights as required,
d. Replace the washers andlocknuts, andtighten locknuts.
4. Repeat Step 2. If the moving forces are equal, proceedto Step 5. If they are still
unequal, repeat Step 3.
5. Replace trim cover on top of vertical column andsecure with two hex socket butĆ
ton headcapscrews.