C
HAPTER
3. M
AINTENANCE
P
ROCEDURES
3-35
02.9628.0010 CONFIDENTIAL
7-Oct-97
3.3.1.2 Blue/Amber Bulkhead Stepper Motor Removal and
Replacement
Parts
:
1 EA ASSY, MOTOR & MOUNT, BAB (22.9628.0240)
2 EA CABLE TIE, SMALL .10X4" (55.2186.0001)
Tools
:
Screwdriver, #1 Phillips
Screwdriver, #2 Phillips
Nutdriver, 5/16 inch
Versilube
Superbonder 498, as needed (06.6007.0498)
To remove and replace Blue/Amber Bulkhead Stepper Motor:
Note
: The stepper motors currently manufactured have a larger bearing
than older versions. The larger bearing does not fit the motor mount used
on the blue/amber bulkhead. Since it is not possible to modify the motor
mounting bracket outside of a shop, a repair assembly has been created
with two new motors and a modified mounting bracket. The required
MTA connectors and strain reliefs are part of the repair assembly.
Step 1. Remove power to luminaire.
Step 2. Remove 12, 6-32x5/16"PPB screws that secure head covers to
rails and remove both head covers (
Figure 3-1
).
Step 3. At yoke termination board, disconnect motor connectors:
a. 8-pin connector from AMBER header marked YTB-P8.
b. 8-pin connector from BLUE header marked YTB-P6.
Step 4. Remove motor mount (with both motors).
a. At bulkhead corners, remove two cable ties securing motor
wires to cable anchors. Also remove two cable ties placed
on wires between cable anchors.
b. At motor mount, remove four 4-40 KEPS nuts that secure
mount to bulkhead and remove mount (
Figure 3-2
).
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