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7. Correctly install the motor support onto the brake cylin-
der and install the four (4) capscrews and lockwash-
ers. These capscrews compress the brake springs and
should be tightened evenly in 1 or 2 turn increments
until the motor support contacts the brake cylinder. If
you encounter excessive resistance that would require
more than hand turning of the capscrews, one or more
components may have become incorrectly positioned.
Remove the motor support and check the position of
all parts, especially the spacer plate, and begin the instal-
lation again. Tighten all four capscrews to the proper
torque.
8. Install a new O-ring (item 10) onto the motor pilot
and install the motor onto the motor support with two
capscrews and lockwashers (items 45 & 46). Torque the
capscrews to their proper value.
9. Install a hand pump with an accurate 0-2,000 psi (0-
13,800 kPa) gauge and shut-off valve to the brake
release port. Apply 1,000 psi (6,900 kPa) to the brake
and close the shut-off valve. Let the brake stand for five
(5) minutes. If there is any loss of pressure, the brake
pack should be disassembled for inspection of the seal-
ing surfaces on the brake cylinder and motor support,
and for damage to the piston seal or O-ring and backup
ring in the motor support. If there is no loss of pressure,
release the pressure with the shut-off valve, remove the
pump and install the hose between the brake cylinder
and the brake valve block.
