Engine Oil Pressure Sensor Circuit; Oil Switch; In Normal Condition; Operating Pressure Of Oil Switch - Kubota U20-3 Workshop Manual

U20-3, U25-3 WSM
e. Engine oil pressure sensor circuit
ST AC
10A
B
OFF
1. Engine oil pressure sensor is N.C.(Normal close) type.
2. Check relay is N.O.(Normal open) type.
3. Meter panel (Big): (1) Engine oil pressure line.
(2) Battery IG(+)
(1) In normal
(2) In trouble
Check relay
N.O.
Charge
lamp
Altrenal
Regular

Oil switch

1. Code No, :15531-39011
2. DC12V
(1)
3. Warning lamp :SW
4. Operating pressure :0.5 ± 0.1 kgf/cm
5. Insulation resistance :3M
(2)
(3)

(1) In normal condition

(4)
(2) In trouble
(5)
(6)

Operating pressure of oil switch

(7)
······Ref. value : 0.5 kgf/cm
V-M-9
Electrical system (Mechanism section)
2
4
1
8
Meter Panel
(Big)
Oil pressure
lamp
Check
lamp
(3) Charge line
(4) Check relay line
When the engine lube oil pressure goes up, the
contact of oil switch 6 opens to turn off the lamp.
When the above pressure comes down, the con-
tact of oil switch 6 closes to turn on the lamp.
(1) Terminal
(2) Insulator
(3) Spring
(4) Rubber
N.c.
2
Ω or more
2
, 7.1 psi, 0.05 MPa
(5) Contact rivet
(6) Contact
(7) Body