Bell Crank Assembly (1135-103-1 & -2) - BOMBARDIER Chalenger 604 Supplemental Maintenance Manual

2.4 Bell Crank Assembly (1135-103-1 & -2)
2.4.1 Engine Cable
Before removing the bell crank, the engine (push-pull) cable must be disconnected from the
bell crank, on the side to be replaced. This connection is the same one ordinarily used on
CL-604 with or without Enhanced AutoPower. After replacement of the bell crank, this
connection will, of course, be replaced. Breaking and replacing the connection at this point,
external to the Enhanced AutoPower assembly, will require rerigging. See paragraph 2.4.5.
2.4.2 Tools
7/64 inch Allen head wrench
Needle nose pliers
Retaining ring tool (see paragraph 4.2)
2.4.3 Removal
There are two bell cranks (1135-103-1 and 1135-103-2), a left and a right. The right bell
crank will be on the left, and vice versa, to the mechanic lying below the Enhanced
AutoPower assembly. The left and right cannot be interchanged. However, it is helpful that
the outside end of the bell crank shaft is stamped –1 or –2 : the left side is indicated by −1,
which is on the mechanic's right; the right side is indicated by −2 and goes on the opposite
side.
Remove the pivot pin (1135-232) connecting the inner arm of the bell crank to the link. Allow
the (gold colored) link (1135-110) to hang free, see section 3.0. Disconnect the outer arm of
the bell crank assembly from the push-pull engine cable.
Remove the four #6 Allen head screws, which attach the bell crank assembly to the support
structure of the Enhanced AutoPower assembly. The entire bell crank assembly, including
the outer and inner arm, and the connecting shaft can now be removed from the support
structure.
2.4.4 Replacement
Replace a new unit by reversing the procedure above, for removal. Make sure that the outer
arm is outside of the structure and the inner arm goes into the structure. The end of the bell
crank shaft is stamped with either –1 or –2, at the outer arm.
2.4.5 Rigging
The above process will probably have a negligible effect on rigging. However, the rigging
must be checked after bell crank replacement, and adjusted as required. Note that a
minimum of "cushion" should be employed at full power and at flight idle. Excessive cushion
will store a load in the clutches, resulting in a heavy force requirement to move the throttles
out of those positions.
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