Cleaning; Replace Seals And Collar Lining - Will Burt Hurry-Up Mast 3.5-7 Operator's Manual

7.3 Cleaning

The Will-Burt Company's Hurry-Up Masts should be cleaned on a regular basis to ensure
smooth operation and to prolong useful life. Cleaning should be performed whenever the mast
tubes are noticeably dirty or become difficult to push up.
Note: It will be much easier if two people can perform this procedure.
To clean the mast:
1. Remove top load from the mast.
2. Set up the mast as described in the operation instructions (Section 5.1).
3. With one person pushing a mast tube up, the other person can wipe the tube clean using
a non-abrasive cleaner or solvent such as lacquer thinner. Do not allow the cleaning fluid
or solvent to run down inside the collar.
Note: Take care not to pinch your fingers between the collars as each tube is lowered.
4. Repeat this procedure for all of the mast tubes.

7.4 Replace Seals and Collar Lining

This section describes replacing the seals on the mast. Prior to performing corrective
maintenance, remove:
•
The payload from the mast
•
The mast from the mounting structure
•
Any plugs from the air inlet ports
To disassemble the mast:
1. Place the mast horizontally on a pair of saw horses or similar supports. Secure the base
tube to the supports so that the mast does not roll off. Use care to follow all applicable
lifting precautions whenever lifting the mast or components of the mast.
2. Disassemble the mast starting with the top tube and work towards the base tube. To
remove the top tube, remove the three 10-32 flat head screws from the top collar. Slide it
off the end of the top tube.
3. Slide the top tube out. Do not drop the tube as it comes out. Use care to follow all
applicable lifting precautions whenever lifting the mast or components of the mast.
Note: The nylon stop panel / bearing will come out with the tube. This is a 1/32" thick
sheet of nylon.
4. To remove the next tube, remove the three 10-32 flat head screws from the next collar.
Repeat this procedure for each subsequent mast tube.
5. Remove the old seal from the bottom of each tube and clean the seal groove.
TP-5928001-C
February 2023
H -U ® M O
URRY P AST PERATOR
'
M
S ANUAL
7-3