Maintenance
40
02.01|FDB 150, 300, 340, 660, 900, 1040 |en
6 Remove the button head screws and retainer securing the
boot to the front of the unit.
7 Remove the boot.
8 On the air supply block, remove the small set screw visible be-
low/near the spindle air supply port.
9 Remove the two socket head screws securing the air supply
block to the side of the unit.
10 Remove the air supply block. Retain all seals and fasteners for
reuse.
11 Remove the fitting exposed when the air block is removed by
turning it counterclockwise.
12 Remove the small set screw in the front face of the housing.
13 Use needle-nose pliers to remove the pivot pin that secures
the gimbal ring in the housing.
14 Move the air motor spindle sideways in the housing toward
where the fitting was removed in the previous step and pull
the motor assembly from the unit.
15 Loosen the three small set screws from the air supply ring
around the back of the motor.
16 Pull the air supply ring to the rear off the motor.
17 Remove the two pieces of tubing from the gimbal ring.
18 Locate the two small set screws in the gimbal ring and remove
them.
19 Use needle-nose pliers to remove the pins that were secured
by the set screws removed in the previous step.
20 Pull the motor assembly out of the gimbal ring being careful
not to loose the wave spring.
Reassembly:
21 Coat the wave spring with light grease and place it on the
shoulder inside the gimbal ring prior to sliding the motor as-
sembly in place. The grease will hold the spring in position
during this step.
Slide the motor assembly into the gimbal ring making sure
that the wave spring remains in place, then press the two pins
into the gimbal ring and into the bearing on the motor. Note:
The undercut band on the pins must be oriented to the out-
side, refer to the figure. The pins should be pressed in flush
with the flat surfaces on the gimbal ring.
22 Insert the two set screws into the gimbal ring that secure the
pin and tighten (torque to 0.67 Nm).
