Glow Plug; Safety Switch; Clutch Pedal, Pto Gear Shift Lever And Hst Pedal - Kubota B2410 Workshop Manual

82410 • 82710 • 82910 WSM, 12271
(2) Glow Plug
9 ELECTRICAL SYSTEM
This plug is a two-material type QGS (Quick Glow
System) for quick temperature rise, and has self-
controlling function as well as excellent durability.
The heater (4) connected in series to the heater (3),
which also functions as the resistor, is incorporated in
the sheath tube (1) of the super glow plug.
The resistance of this heater (3) cum resistor is small
when the temperature is low, while the resistance
becomes large when the temperature rises.
Therefore, because sufficient current is flown to the
heater (4) during the initial period of energization, the
temperature rises qUickly and the resistance grows with
the rise in the temperature of the resistor, the flowing
current is reduces to prevent the heater (4) from being
heated.
The ignition point is in the area of 2 to 3 mm (0.079 to
0.118 in.) from the tip of the plug in order to reduce its
projection into the combustion chamber.
®
11790F90400
1200
t
1000
(a)
800
30A
t
20A
(b)
10A
10 20 30 40 50
( c ) -
11790F90410
(1) Sheath Tube
(2) Insulation Powder
(3) Heater also functioning as a
Resistor
(4) Heater
(5) Super Glow Plug
(6) Conventional Quick-heating
type Glow Plug
(7) Glow Plug Current
(a) Glow Plug Temperature eC)
(b) Current (A)
(c) Time (Sec.)
120 1 OM90030
(3) Safety Switch
• Clutch Pedal, PTO Gear Shift Lever and HST Pedal
Released
(when shifted)
A
o
i
i
12270F90020
Depressed
(when neutral)
BA
The safety switch prevents current from flowing to the
starter when the safety switches are not depressed.
This is to ensure safe starting.
The safety switches are located three (Clutch pedal,
PTa gear shift lever, HST pedal and range gear shift
lever) different position.
(A) From Main Switch
(B) To Starter
12270M90020
9-M6