Figure 5-5. Ballhead - Woodward 3161 Governor Installation And Operation Manual

Manual 03101
3. Pistons, output shafts, speed setting shaft and the drive shaft may be lightly
polished with a fine grit cloth or paper to restore a smooth finish to the
bearing surface.
4. Inspect all springs for rust and corrosion.
Inspection Procedure
The following instructions are for parts that are considered to be the most
vulnerable to wear, but all parts should be visually inspected.
Droop Pin (20)
Inspect the droop pin for wear in the area of contact with floating lever (125).
A flat spot worn on this pin can cause a change in the droop setting.
Connecting Pin (22)
Check the pin for wear caused by up and down motion of the servo
connecting link (102).
Output Shafts (25)
Inspect the bearing and seal area of the shafts for wear. Polish slight seal
marks with fine grit paper.
Speed Setting shaft (28)
Inspect the bearing and seal area of the shaft for wear. Polish slight seal
marks with fine grit paper, or relocate the seal slightly to ensure against
leakage.
Pump Element (79)
Inspect the pump element for wear.
Pump Housing (82)
Inspect the housing for wear and damage. Be sure there is no evidence of
galling on the wall next to the outer pump gear.
Drive Shaft (86)
Inspect the shaft for damage to the serrations, and for oil seal wear. The
drive shaft must slip freely into the engine drive coupling. Polish light seal
wear with fine grit paper.
Limit/Shutdown Pilot Valve (100)
The control land must have sharp corners and be void of nicks and
scratches.
Servo Connecting Link (102)
Check the .251 diameter hole for elongation.
Ballarm Pin (106)
Inspect the pins for brinelling on the bearing area. Replace pins if there is
any measurable wear.
Ballhead (109)
Serrations on the ballhead bushing must slip freely into drive coupling (108).
Nicks and burrs on the ballhead will cause problems when installing the
ballhead cover.
Woodward
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3161 Governor
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