Telescoping Mast - Will Burt 7-30 HDL Operating Instructions Manual

PNEUMATIC MAST WITH REMOTE LOCKING SYSTEM
OPERATING INSTRUCTIONS
3.3.1

Telescoping Mast

The telescoping mast (Figure 3-1):
• Is the structure used to raise the payload to an operational height.
• Consists of concentric, nesting mast tubes.
• Extends and retracts pneumatically.
• Can be non-rotating or rotating.
• Has locking collars. When desired tubes are raised and locked into position, the mast is
depressurized.
• Has collars fitted to the top end of each tube except the top tube which is fitted with a top tube
stop.
• Has two rectangular keys along each tube, except the base tube. These keys align with
keyways in the next larger adjacent tube's collar and are used to establish azimuth
(rotational) integrity between the tubes.
• Uses heat-treated super pins with a close azimuth design which are three times as strong as
universal pins.
Drain Hole
Side Air
Inlet Port
Figure 3-1 Ultra Heavy Duty Pneumatic Mast with Remote Locking System (P/N: 710991590
PAGE 20 OF 164
Top Tube Stop
Guy Lug
Air Cylinder
Base Tube
Tube Head
Shown)
TP-5580101-A
FEBRUARY 2022