80
Fig. 30
Fig. 31
Fig. 32
Fig. 33
g) LUBRICATION
On vertical shaft engines, lubrication is provided by a
positive displacement type pump (Fig 30) which forces
oil to the top main bearing via a drilling in the camshaft
and a gallery in the crankcase (Fig 31).
The horizontal shaft engine is lubricated by means of a
dipper (Fig 32) secured to the conrod by the big end
bolts. After removal check the dipper for cracks or
distortion; replace if necessary.
h) MECHANICAL GOVERNOR
Standard Governor (Fig 33)
The mechanical speed governor is situated inside the
crankcase and consists of three parts:
1 - Governor gear
2 - Flyweights
3 - Spool
a. - shaft
b. - retaining rings
The unit is mounted on shaft (a) and is secured by two
rings (b). Remove spool and check both parts for wear
or damage Replace if necessary.
Some later governors use a barb on shaft (a) to retain
the spool (3). Removal is by gripping the spool firmly in a
vice, and pulling the spool over the barb.
To remove the governor gears (1), shaft (a) must be
removed from the flange. Grip shaft (a) in a vice and
strike the flange gently with a soft mallet.
The original spool should not be re-used if removed.
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