Constant Speed Unit (Csu) Removal; Constant Speed Unit (Csu) Installation - Thrush Aircraft S2R–T660 Maintenance Manual

THRUSH AIRCRAFT INC - T660 TURBO THRUSH
AIRCRAFT MAINTENANCE MANUAL CONSTANT SPEED
UNIT (CSU) REMOVAL
A. Remove the forward engine cowling.
B. Remove bolt that secures the propeller control cable to the governor's speed select lever.
C. Remove the cotter pin, castellated nut, washer and bolt securing the Nf governor-
interconnecting rod to the Nf governor reset arm.
D. Remove the cotter pin, castellated nut, washer, bolt and spacer securing the front clevis
end to the propeller-reversing lever.
E. Remove the cotter pin, washer, clevis pin and bushing securing the propeller-reversing
lever to the beta valve. Remove reversing arm.
F. Disconnect coupling nut of pneumatic (Py) front tube from straight nipple on propeller
governor.
G. Remove the four nuts and washers anchoring the governor to the mounting pad on the
reduction gearbox case.
H. Remove governor and governor mounting pad gasket.
I. If CSU is to be replaced by a new or overhauled unit, remove the straight nipple from Py
port on governor. Remove "O" ring and retain nipple for reuse on the replacement unit.

CONSTANT SPEED UNIT (CSU) INSTALLATION

A. Install a new gasket over the four studs on the governor-mounting pad.
Make sure the gasket is placed on the mounting pad with the
raised side of the screen up so that it will fit into the recess on
the base of the governor.
B. If a new or overhauled propeller governor is to be fitted, install straight nipple as follows:
1. Lubricate new "O" ring with clean engine oil and install on nipple.
2. Install nipple in Py port on propeller governor. Tighten and torque nipple to 65 to
70 lb. in.
C. Lightly coat the splined shaft of the governor with clean engine oil.
Effective: 12/17/03
** CAUTION **
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