Yanmar YM135d - Turn Signal Lights (Optional); Water Temperature Indicator Light; Engine Lube Oil Pressure

9 TURN SIGNAL LIGHTS (OPTIONAL)
(1) Specifications
Flasher relay
12V-23W heat band snap type
(2) Description of the Turn Signal. Lights :
The turn signal light system is composed of the
turn signal switch, the flasher relay, and the signal
lights.
The flasher relay, a heat band snap
type,.opens
and closes a pair of contact points through ex-
pansion
rejulting from a rise in temperature of a
heat band.
nTurn signal light IL)
0 i -
Turn signal switch
I
Flasher relay1 (60--120lmin.)
J
Banew
10. WATER TEMPERATURE INDICATOR
LIGHT
(1) Specifications
(2)
Description of the Water Temperature System
Item
Water temperature
indicator light
Water temperature
sensor unit:
~ctivating temperatire
Electrical capacity
A sensor consisting of a substance with a high
heat expansion rate
is fitted at the tip of the unit,
and goes
ON when the water temperature reaches
248" F (120°C).
Specificadons
12V-3.4 W
ON at 24~~i5.4~~
(120°u0c)
OFF at ~33.6~i5.4~~)
11 12°u0~1
12V-7A
Therefore, it is quite normal for the water tem-
perature indicator light to stay off even if the
starting switch
is set to the ON position, as long
as the engine is cold.
11. ENGINE LUBE OIL PRESSURE INDICA-
TOR LIGHT
(1 ) Specifications
I Oil prersur~rwitch
I Activating pressure 2.W psi I1 kg/cm21 I
1 tern
Specnflcattons
(2)
Description of the Lube Oil Pressure In.
dicator Light
1
Lube oil pressure
indicator light..
As described earlier in Chapter V, Section 13 and
Chapter
VII, Section 11, the lube oil pressure reg-
ulating valve, which is fitted inside the lube oil
filter (cartridge type)
is adjusted to 21.34 - 35.
56 psi (1.5
- 2.5 kg/cm2), while the relief valve
is set to activate at a pressure of 17.07
- 11.38
psi
(1 2 0.2 kg/cm2 1.
. .
12v - 3.4.w.
. .
The lube oil switch is fitted in the lower part of
the cylinder block, to the left of the lube pipe.
It is activated when the lube oil pressure drops,
which simultaneously turns on the indicator light.
The oil pressure forces the diaphragm ,upwards.
to open the contact points, so that when pressure
is normal, the indicator light remains .. OFF. ..
When the oil pressure drops, the contact points
close to allow electricity to flow to turn
ON thk
. ..
indicator light.
. .. .
. .
. .
Thus, when the starting switch is moved to the
ON position, the indicator light goes ON since.