Jinma Tractor Introductory User Guide July 2007 Page 10
Starting.
Unlike gasoline engines which use a spark plug to ignite the air/fuel mixture, diesel engines rely on
the heat produced by highly-compressing air in the cylinder to initiate combustion. In a diesel engine,
the Starter motor must create significant compression in order for the diesel engine to start. In cold
weather this is difficult.
Glow plugs are used to heat the combustion chambers of diesel engines to help initiate combustion
of the diesel fuel. There is one glow plug for each cylinder. In the tip of the glow plug is a coil of a
resistive wire or a filament which heats up when electricity is connected. Glow plugs are required
because diesel engines produce the heat needed to ignite the diesel fuel by the compression of air in
the cylinder and combustion chamber (compression produces heat). Heating the air to a minimum
starting temperature of 850°C is critical for diesel engine start-up. In cold weather, and when the
engine block, engine oil and cooling water are cold, the heat generated during the first compression
revolutions of the engine is conducted away by the cold surroundings, preventing ignition of the diesel
fuel. The glow plugs are an additional source of heat in the cylinder and are switched on prior to
turning over the engine to provide heat to the combustion chamber. The glow plugs remain on as the
engine is turned over (started) to help ignite the diesel fuel. Once the diesel engine is running, the
glow plugs are no longer needed.
19) Hand throttle: This lever is located to the
right of the Steering Wheel. Pulling the hand throttle
toward you (rabbit) increases the diesel fuel flow to
the engine and the RPMs of the engine. Pushing it
away (turtle) decreases the fuel flow.
This hand throttle is can be used when the tractor is
stationary and driving attachments either through the
hydraulic system or through the PTO. When
“driving” and expecting to change speeds using the
foot throttle pedal, the hand throttle should be set to its lower range. The hand throttle can also be used as a
speed control to set a constant speed such as when mowing. If doing work which involves locomotion as well
as the hydraulic system, the hand throttle can be set higher to match workload or to increase hydraulic
performance. Note: If the hand throttle is set higher when the tractor is moving, then the clutch and gearing
have to be used to control speed; this may create more wear on the clutch. Again, remember that the Hand
Throttle overrides the Foot Throttle; if you are going too fast, readjust the Hand Throttle or depress the clutch
and change the Gears.
: Do not run the starter more than 5-
10 seconds at one time, let it rest
for 1 minutes between start attempts, and do not try more than 5 attempts in a row
without letting the starter cool for 15 minutes. Failure to follow t
can burn out the Starter Motor
Caution:
The hand throttle overrides
To Next Page
Loading...
