OM 2012
(a) Overspccd ~~o~crnor .
The overspzed governor (5, Fig. 3)
is a rfecharlica I fly-we i&t i’ypr: ,
mounted ot the rear of the engine alrd driven throL!gh an adai:.:e: by the
canahcrft.
E Irctrical contacir, in the governor are connected in pxa lict I
with other engine shutdcwn devices. The gol;srnDr i; adiustcd to c;lcze
the ~otlfu~t- ond actuate the shutdown solnnoid when an enginz stxed of
2250 to 2300 KPM is reached.
The governor must tx manually reset, after
tr ipp ing ,
by pushing a button located on the governor head.
(b) Temperature sensing safety switch
This switch (IO, Fig. 5) is mounted in the engine water outlet manifold
and is identified as an “Alarmtut”.
It is very sensitive to temperature
changes and functions to protect the engine against overheating caused
by low coolant level, brcken fan belt, etc.
It sends a signal which
activates the shut-down solenoid to stop the engine when temperature
in the cooling system reaches 205 deg F.
(c) Start circuit cut-out switch
.
This is a Micro-type switch (7, Fig. 5),
mounted just be lciw the air-va Ive ,
shutdown solenoid. It is mechanically actuated by the air-valve operating
lever. The switch is electrically connected in series with the .starter
switch.
In the event t’he
In normal opzration the.switch is CLOSED.
shutdown solenoid is actualed to stop the engine, the switch is OPEIqED
to prevent operation of the engine starter until the shutdown air valve
is LATCHED in OPEN position.
(d) Start circuit solenoid switch
This solenoid type switch (4, Fig. 5) f
unctions to conduct 12-V DC power
to the engine starter switch when the panel mounted pushbutton start switch
is pushed. Th
e solenoid switch serves to by-pass and protect the push-
button starter switch against heavy load current in case the starter device
gear should fail toengage the flywheel ring gear proprly.
Aug 25 ‘85
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