S.5Supplement
Brake Maintenance
4. Adjust the air gap. Use a 3/16" hex
wrench or flat screwdriver on older
models. To decrease the air gap, turn
both adjusting screws (1) clockwise. To
increase the air gap, turn both screws
counterclockwise. Turn the screws
evenly, 1/8 turn, then manually depress
the plunger. Recheck the air gap. Turn
both screws evenly, 1/8 turn at a time,
until the bottom of the plunger is at the
SET position (2) on the air gap reset
label.
5. If the air gap reset label is missing,
measure (3) from the solenoid frame
to the bottom of the plunger. If the gap
measurement exceeds .69" (17.5 mm)
or 11/16", adjust the air gap. Turn the
adjusting screws and set the air gap to
.45" (11.4 mm) or 29/64". This is the
measurement at the SET position on the
label.
NOTICE
Friction discs may need replacement. Discs
must be replaced when worn to 3/32" or .093"
(2.4 mm). See the following pages.
6. Install the housing (4). Apply grease
to the O-ring (5) in the end plate. Earlier
brake models have a gasket instead of an
O-ring; do not apply grease to the gasket.
Place the end of the spring (6) on the
right side of the hole in the housing. Install
the housing and fasten with the three
nuts; torque to 12-14 inch-pounds (1.4-1.6
newton meters).
7. Test the brake. See Testing the Brake
on page S.3.
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