Kubota U20-3 User Manual

U20-3, U25-3 WSM Electrical system (Mechanism section)
V-M-9
e. Engine oil pressure sensor circuit
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. (3) Charge line
(2) Battery IG(+) (4) Check relay line
Oil switch
1. Code No, :15531-39011
2. DC12V
3. Warning lamp :SW
4. Operating pressure :0.5 ± 0.1 kgf/cm
2
5. Insulation resistance :3MΩ or more
(1) In normal condition
When the engine lube oil pressure goes up, the
contact of oil switch 6 opens to turn off the lamp.
(2) In trouble
When the above pressure comes down, the con-
tact of oil switch 6 closes to turn on the lamp.
Operating pressure of oil switch
······Ref. value : 0.5 kgf/cm
2
, 7.1 psi, 0.05 MPa
(1) Terminal (5) Contact rivet
(2) Insulator (6) Contact
(3) Spring (7) Body
(4) Rubber
2
1
4
8
ACST
B
OFF
10A
Check relay
N.O.
Altrenal
Regular
Meter Panel
(Big)
N.c.Charge
lamp
Check
lamp
Oil pressure
lamp
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(1) In normal
(2) In trouble

Kubota U20-3 Specifications

General

Brand	Kubota
Model	U20-3
Category	Excavators
Language	English