Lull 6K Service Manual - Manual (Page 458)

Boom and Transfer
6-208 Service Manual — Models 644B, 6K, 844C, 8K, 1044C, 10K
Extension Cylinder
4-Section Boom
Description
Fig. 6-224: 4-Section Boom Extension Cylinder
The 4-section boom extension cylinder is located beneath the boom
assembly. It is attached from the middle (rear) to the outer boom section.
Its operating pressure is 3000 psi and weighs 650 pounds. When
completely retracted, it is 149-3/4" long. When fully extended, it is 280-3/4"
long.
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