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Chapter 8 FUEL SYSTEM
2.9 Outside Diameter and Inside Diameter of Bearing Fit
(Oil pressure governor spec)
Rotate the bearing and if the rotation is not smooth, replace the bearing with a new one.
Inspect the fit of drive shaft, idler shaft and bearing. If significant wear is found, replace them with new ones.
Inspect the fit of drive case and bearing. If significant wear is found, replace them with new ones.
* Woodward PSG type governor and EG-3P type governor
Item Nominal value Standard value
Outside diameter and
inside diameter of bearing fit
Inside diameter of drive shaft case bearing housing ø52 mm [2.05 in.]
51.988 to 52.018 mm
[2.0468 to 2.0480 in.]
Drive shaft side bearing
outside diameter ø52 mm [2.05 in.]
51.987 to 52.000 mm
[2.0467 to 2.0472 in.]
Inside diameter ø25 mm [0.98 in.]
24.990 to 25.000 mm
[0.9839 to 0.9843 in.]
Outside diameter of drive shaft bearing fit ø25 mm [0.98 in.]
25.002 to 25.011 mm
[0.9843 to 0.9847 in.]
Outside diameter of drive shaft gear fit ø26 mm [1.02 in.]
26.035 to 26.048 mm
[1.0250 to 1.0255 in.]
Inside diameter of drive gear fit ø26 mm [1.02 in.]
26.000 to 26.013 mm
[1.0236 to 1.0241 in.]
Inside diameter of idler shaft case bearing housing ø47 mm [1.85 in.]
46.989 to 47.014 mm
[1.8500 to 1.8509 in.]
Idler shaft side bearing
outside diameter ø47 mm [1.85 in.]
46.989 to 47.000 mm
[1.8500 to 1.8504 in.]
Inside diameter ø20 mm [0.79 in.]
19.990 to 20.000 mm
[0.7870 to 0.7874 in.]
Outside diameter of idler shaft bearing fit ø20 mm [0.79 in.]
20.002 to 20.011 mm
[0.7875 to 0.7878 in.]
Outside diameter of idler shaft gear fit ø24 mm [0.94 in.]
24.035 mm 24.048 mm
[0.9463 to 0.9468 in.]
Inside diameter of idler gear fit ø24 mm [0.94 in.]
24.000 to 24.013 mm
[0.9449 to 0.9454 in.]
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