MEASURING RAIL-TO-ROLLER CLEARANCE - continued

Repeat the same procedures at one-half and . . .

. . . at full upright extension. The key should be off

when making each measurement.

Notice that you must work quite high off the ground . . . use

ladders and maintenance stands that meet applicable

OSHA standards.

Clearance between the top intermediate roller set and inner

rails at full down, one-half extension and full extension,

is 2/32nds, 4/32nds and 6/32nds of an inch. We will

shim to 2/32nds of an inch, so two shims must be added

to the roller set at the top of the intermediate rails.

5-170