Kubota WSM 07-E3B Series User Manual

M-11
07-E3B SERIES, WSM
ENGINE
5. FUEL SYSTEM
[1] GOVERNOR
The engine employs the separated fuel injection
pump in combination with Kubota's own small multi-
function mechanical governor, which enables more
dependability.
It also employs the torque limiting mechanism to
control the maximum peak torque so that it complies with
the regulations of exhaust gas.
This mechanism maintains engine speed at a
constant level even under fluctuating loads, provides
stable idling and regulates maximum engine speed by
controlling the fuel injection rate.
This engine uses a mechanical governor that controls
the fuel injection rate at all speed ranges (from idling to
maximum speed) by utilizing the balance between the
flyweight’s centrifugal force and spring tension.
W1013830
 At Start
The stop solenoid (4) (energized-to-run type) is
powered to release the governor connecting rod (2).
As no centrifugal force is applied to flyweight (5), low
tension of start spring (3) permits control rack (1) to move
the starting position A as showing the arrow, supplying
the amount of fuel required to start the engine.
W1013967
(1) Idle Limit Spring
(2) Injection Pump
(3) Control Rack
(4) Start Spring
(5) Torque Spring
(6) Output Limiting Bolt
(7) Torque Limiting Bolt
(8) Stop Solenoid
(9) Fork Lever 1, 2
(10) Governor Sleeve
(11) Flyweight
(12) Governor Spring
(13) Governor Connecting Rod
(1) Control Rack
(2) Governor Connecting Rod
(3) Start Spring
(4) Stop Solenoid
(5) Flyweight
A : To Start Position
KiSC issued 06, 2020 A

Kubota WSM 07-E3B Series Specifications

General

Brand	Kubota
Model	WSM 07-E3B Series
Category	Engine
Language	English