Henny Penny 500 Service Manual page 78

Loosen the Allen set screw in the outer ring of limit stop. Thread the inside
8 8 ) )
portion up and down several times to check for ease of operation. If thread feels
tight or must be forced, threads may be damaged. Discard and replace with new
limit stop assembly.
NOTICE:
Using a nylon tape type wrench, unthread the limit stop collar from the acme
9 9 ) )
nut.
Gently tap the acme nut from the center crossbar. Inspect the acme nut for
1 1 0 0 ) )
thread damage. If the threads are thin and sharp, or worn, replace with a new
acme nut.
64
The acme nut must be changed when there is excessive
play and movement between the spindle and the acme
nut.