Figure 24. - TM-10-3930-607-150219

UPRIGHTS

primary and secondary rods are forced out of the

cylinder shell. The guide and crosshead assembly,

being attached to the top of the secondary rod, moves

up. At this time the carriage, which travels twice as fast

as the crosshead, is free-lifting.

The carriage will free-lift until the top lug on the back of

the crosshead engages and rotates the latch in the box.

(Fig. 24) Also, at the same time, a shoulder on the back

of the crosshead contacts the upper crossmember of the

inner upright. (Fig. 25) Since the left latch is now free

to rotate, it does so while the inner upright rises. The

right latch will rotate until it rests against and locks the

left latch around the top lug on the crosshead.

Figure 25.

As the inner upright is extended, the cylinder guide

makes contact with the upper crossmember on the

intermediate upright. (Fig. 26)

Figure 24.

The second stage begins after the inner upright is free to

rise. At this time, the crosshead is latched to the inner

upright, and the intermediate upright is latched to the

outer. The inner upright is free to rise. The secondary

rod in the cylinder will move out of the primary rod when

the primary rod reaches the end of its travel.

Figure 26.

At the same time the lug on the adapter plate engages

and rotates the front latch on the intermediate upright,

unlocking the rear latch. With the rear latch free to

B-183