TM5-6115-593-34NAVFAC P-8-631-34TO-35C2-3-463-2(15)Repeat maximum and minimumma adjustments until terminal shaft travelscorrect distance and steps (12), (13) and(14) are satisfied.(16)Shut off test stand, if used.Disconnect test circuit. Remove speedsetting adapter plate and replace it withcover. Be sure speed setting screwsprotrude the same distance below edge ofcase, or that the governor's speed issufficiently high to prevent interference withactuator portion.(17)Disconnect unit, remove anddrain test fluid.f.AdjustmentsAfterTests. When actuallyoperating, set the governor section approximately5 percent higher than the actuator section. Thisallows the actuator to control.12-3. ADJUSTMENTS. Speed adjustments may beperformed with the governor actuator installed on theengine.a.The speed adjustment screw in on top ofthe unit. Turn the adjustment screwclockwise to increase the speed andcounterclockwise to decrease speed.b.Figure 12-3 shows the speed adjustmentshaft (23), and the high (16) and low (3)speed stop screws. Use the speedadjusting shaft to change speeds betweenthese preset ranges. Speed may bechanged remotely with the speed adjustingshaft and the proper connections.c. Adjust the unit's speed using the speedadjustment screw or speed adjusting shaftuntil the desired steady-state speed isobtained. Simulate an underspeedcondition until the terminal shaft travels to aposition just short (1 to 2°) of maximum lineon the dial plate. Readjust the speed-setting screw if necessary to obtain terminalshaft position at the required speed.d.Simulate an overspeed condition until theterminal shaft travels to a position just short (1 to2 ) of the minimum line on the dial plate. At thispoint the speed should rise by the amount ofdroop percentage. If the speed droop needs to beincreased, move the droop bracket towards theflyweights. Move the droop bracket away fromthe flyweights to decrease droop.e.If droop is readjusted, readjust the speed asrequired to obtain the desired results.12-4. REPLACEMENT.a.Removal. Remove the governor/actuator fromthe engine as follows:CAUTIONDisconnectnegativeterminalcablefrombattery.Removeexternalpower.(1)Disconnect linkage (figure 12-4) ongovernor/actuator.(2) Disconnect electrical connector ongovernor/actuator.(3) Disconnect oil line to the governor/actuator.(4) Remove bolts securing unit to sump. Pull straightup, and remove unit and gasket.b.Replacement.Reinstall or replace unit as follows(see figure 12-4):(1) Using a new gasket between thebase of the unit and the mounting pad,mount the governor/actuator unit on themounting pad. Square the unit with theengine linkage and in line with the drive.Fit the splined drive shaft into the drive witha free, slip fit; no tightness is permitted.Set the unit on the mounting pad of its ownweight without any force being applied.Also, make allowance for unrestricted oilflow drainage through the drive shaft boreand annulus within the base mounting12-6
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