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 TM 55-1905-220-14-10
5-34. GOVERNOR - MAINTENANCE INSTRUCTIONS.
a. The governor maintenance at this level of maintenance is limited to the hydraulic governor drive and
the synchronizing motor.
b.
Description
(1) The governor drive assembly, consists of an integral horizontal drive shaft and bevel
gear and an integral vertical driven shaft and bevel gear, both mounted on ball bearings and contained in a
governor drive housing.
(2) Drive to the horizontal shaft is through serrations on shaft engaging with serrations in
the upper blower rotor shaft. The governor proper is driven through splines on the lower end of the ball head
registering with splines in upper end of the driven shaft sleeve.
(3) The bearing on the horizontal shaft is retained by two bolts, flatwashers, and
lockwashers and on the vertical shaft by two set screws, flatwashers, and lockwashers. The drive housing
flange at the drive shaft is gasketed and bolted to the blower front end cover, while the governor is gasketed
and bolted to the drive housing at the driven shaft opening.
c.
Lubrication
the governor which spills over the moving parts and then returns to the engine crankcase through connecting
drilled passages in the blower front end plate and cylinder block.
(2) If the governor fails to control the engine speed properly, the fault may lie in the
governor drive. To function properly, the clearance between the bevel gears of the drive and driven shafts
should not be less than .001 inch or exceed .003 inch.
(5-548 blank)/5-549
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