Governor Assembly - Woodward 3161 Governor Installation And Operation Manual

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Operation manual (24 pages)

Table Of Contents

Table of Contents

3161 Governor

Ballarms (110)

Replace the ballarms if the toes have a worn flat that exceeds .030 inch in

width.

Ballarm Bearings (111)

Replace rough or seized bearings. Replace bearing if measurable wear

marks were found on pins (106).

Pilot Valve Plunger (112)

The control and compensation land must not have nicks or scratches, and

sharp corners must be retained.

Thrust bearing (117)

Top and bottom races (116-118). Bearing race (116) must not be worn from

ballarm toes. The rollers in bearing (117) must be clean and roll freely.

Floating Lever (125)

Inspect for wear where droop pin contacts the lever. Inspect for wear in area

of contact with the speed setting lever.

To prepare to assemble the governor, lay the parts in an orderly fashion on a

clean dry work surface. Lubricate all O-rings with white petroleum jelly to facilitate

assembly.

Use only new O-rings, seals, gaskets and cotter pins. Careful, precise assembly

methods will save time and help to ensure correct calibration of the governor.

Torque all 1/4 - 20 screws to 90 lb-in (10 Nm).

Assembly Procedures

Install O-ring (128) on needle valve (127) and install it in case (26).

Install O-ring (130) on air bleed plug (129) and install it in case (26).

Install stop screws (34). Leave screws (1) on cover plate (35) loose until

after the governor is calibrated.

Assemble servo piston (103) and link (102). Start double diameter pin (104)

into the chamfered hole in servo piston (103). Align hole in link (102) with

pin, and press the pin in. Be sure the pin does not protrude from either side

of the piston. Install the piston assembly in the case.

Turn case (26) bottom side up. Install retaining ring (99) on limit/shutdown

pilot valve (100). Install spring (98) on the spring seat of plunger (100) and

install this assembly in the case (Figure 5-11).

Install one buffer spring (97), buffer piston (101), and second buffer spring

(97) in the buffer bore of case (26).

Place base gasket (96) on case (26). Install and secure base (95) with

seven screws (75).

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