Servo Drive Subassembly (1135-102) - BOMBARDIER Chalenger 604 Supplemental Maintenance Manual

2.2

Servo Drive Subassembly (1135-102)

2.2.1 Tools
7/64 inch Allen head wrench
#0 Phillips screwdriver
3/16 inch hex wrench
3 mm Allen head wrench (see paragraph 4.1)
2.2.2 Removal
The location of the two servo drive subassemblies (1135-102) is described in paragraph
2.1.2. To remove an entire subassembly it is best to disconnect both round connectors first
and then detach the connector, which is mounted on a bracket attached to the support
structure of the Enhanced AutoPower assembly. The connector mounted on the can will stay
with it, and should not be disturbed.
Before removing a servo drive, the shaft connection to the servo drive must be removed. This
connection is made up of six metric screws through the flange of the shaft (1135-254 on the
right side, or 1135-255 on the left side), into the body of a speed reducer, which is part of the
servo drive (1135-102). These screws can be found on the other side of the sheet metal
support structure (1135-120) on which the servo drive is mounted. Looking at the inside of
that structure, the screws will be seen, through the stainless steel shaft flange, between the
clutch assembly (1135-123) and the sheet metal structure (1135-120).
Remove the six metric screws and save the screws and the lock washers that are used with
them. When the screws are removed, the shaft is supported by a short stub shaft, which
extends between a hole in the output of the servo drive and a hole bored in the center of the
flange of the shaft. Therefore, before removing the servo drive subassembly, the end of the
shaft must be supported by wiring it up to the structure above it.
The servo drive subassembly may now be removed by first removing the six #6 Allen head
screws around the flange of the base of the unit.
2.2.3 Replacement
The replacement unit may be installed by reversing the above process. Note that the
replacement unit will have a stub shaft, which will center the flange of the shaft on the output
and facilitate emplacement of the six metric Allen head screw/lock washer combinations
previously removed.
2.2.4 Rigging
The above procedure has no effect on rigging. RERIGGING IS NOT REQUIRED.
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