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PNEUMATIC MAST WITH REMOTE LOCKING SYSTEM
OPERATING INSTRUCTIONS
TP-5580101-A
FEBRUARY 2022
The locking collar(s) (Figure 3-3):
• Guide bearings to reduce friction when contact is made between the guide plate and the latch
lever from the above intermediate tube
• Uses heat-treated super pins and a close azimuth design
• On the base tube:
• Locks and unlocks pneumatically
• Has two air cylinders which are used to actuate the locks. A reed switch in each air
cylinder (two total) communicates with the control to illuminate an LED when the mast is
pressurized (30 psi) and when the locks are unlocked
• Above the base tube
• Unlock mechanically when contact is made between the latch lever and the guide plate
from the lock below
• Use a spring to lock mechanically when the latch lever loses contact with the guide plate
from the lock below
Figure 3-2 Locking Collar Components
The top tube has a top tube stop which prevents the top tube from sliding too far down into a
nested mast.
Figure 3-3 Ultra Heavy Duty Locking Collars (Not to Scale)
Intermediate Tube Collar
Base Tube Collar
Latch Lever
Guide Plate
Air Cylinder
Locking Pin
Locking Collar 13.5 and 12.375 Mast Sections
Locking Collars for 11.25, 10.00,
9.14, and 8.25 Mast Sections
Summary of Contents for 10-60 HDL
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