Kohler KDI 1903 TCR Workshop Manual

EN
32
2.9 Fuel system
2.9.1 Injection circuit (pressure 2000 bar) (Fig 2.4)
The materials of the fuel system components (pipes, tank, filters, etc.) and any surface treatments must be
free from chemical elements that, transported in the fuel, compromise the operation of the injectors over time
(hole clogging).
The most critical chemical element is Zinc (Zn), therefore it is forbidden to use galvanised components.
Other damaging elements are indicated in the table below.
Tab 2.12
METALS
LIMIT VALUES OF PRESENCE IN FUEL
LIMIT
VALUE
Zn (Zinc)

Zinc (Zn) is eluted from the rubber (NBR) in the fuel line. Thus,
the growing carboxylate (Zn) was adhered on the parts in the
injection system for reacting carboxylic acid in the fuel.

In case that the changed injection quantity, nozzle coking
occurs the fuel contents Zn≥1ppm.

Zinc (Zn) is ≤ 0.3ppm is the limited value to avoid occur coking.
Zn ≤
0.3ppm
Pb (Lead)

Lead (Pb)is eluted from Pd coading in the fuel tank. Thus, the
growing carboxylate (Pd) was adhered on the injection system
for reacting carboxylic acid in the fuel.

In case that the changed injection quantity and nozzle coking
occurs the fuel contents Pd.

As interim, the identical level is the limited value with Zn.
Pd ≤
0.3ppm
Na (Sodium)

The growing carboxylate (Na) was adhered on the parts in the
injection system for reacting carboxylic acid in the fuel with fuel
contents Na ≥ 0.5ppm. Thus, sliding malfunction was occurred.

In case that the changed injection quantity and nozzle coking
occurs the fuel contents Na.

Especially concerns of occurring defects, NaOH is residue for
using production process of bio fuel.

≤ 0.3ppm is the limited value to avoid occur nozzle coking and
carboxylate. Combine K with Na equivalent alkali metal that are
less than 0.3ppm.
Na + K ≤
0.3ppm
K (Potassium)
Ca (Calcium)

In case that carboxylate (Ca) was adhered the injection system
inside.

Under study on the results in the moment.

Maximum value is 0.3ppm when using fuel that is B100 fuel
with regulation EN14214 of contents 7%.
Ca + Mg
≤ 0.3ppm
Mg (Magnesium)
Cu (Copper)

Copper (Cu) on the fuel that can be acted wear and catalyst for
making decline.

In case that the changed injector quantity and nozzle coking
occurs in the fuel contents Cu.

As interim, the identical level is the limited value with Zn.
Cu ≤
0.3ppm
Ba (Barium)

In case that changed injection quantity and nozzle coking
occurs in the fuel contents Barium (Ba).
Ba ≤
0.3ppm

Kohler KDI 1903 TCR Specifications

General

Brand	Kohler
Model	KDI 1903 TCR
Category	Engine
Language	English