jcb 540-170, Service Manual

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Section 1-7 - General Information
Fuel
Acceptable and Unacceptable Fuels
1-7-7 1-7-7
9803/3750-05 (1-08-00)
in filter clogging. To prevent this happening pre-
heating will be required.
Using B20 biodiesel can result in unburnt fuels
accumulating in the engine oil, ultimately this can
affect the engine oil efficiency and lead to engine
damage (with standard diesel any unburnt fuel
evaporates off the lubricating oil). Biodiesels must be
stored to exclude water absorption and oxidation.
The natural properties of biodiesel make it a good
medium for micro bacterial growth, these microbes
can cause fuel system corrosion and early fuel filter
blocking. It will be necessary to consult and seek
advice from your fuel supplier, the effectiveness of
conventional antibacterial additives when used in
biodiesel is still being investigated in the fuel industry.
A high percentage biodiesel mixture (>20%) can lead
to fuel gelling and filter blocking in low temperature
operation, it may also effect the power and
performance of the engine.
To minimise the risk of engine damage when using a
B20 mix, there are additional service requirements.
K
Service Requirements for use of B20
Biodiesel (
T
1-7-4)
If the recommended actions are not taken there may
be the following consequences:- low temperature
filter clogging- injectors lacquering / sticking-
deterioration of seals and rubber hoses- corrosion of
metal parts in the fuel system- engine performance
problems. These risks will be increased if the fuel has
been poorly stored, that is deteriorated through
oxidation and / or water absorption.
Sulphur Content
High sulphur content can cause engine wear. (High
sulphur fuel is not normally found in North America,
Europe or Australia.) If you have to use high sulphur fuel
you must change the engine oil more frequently.
K
Table 2. Sulphur Content (
T
1-7-7) .
Low sulphur fuels must have the appropriate fuel lubricity
additives, these lubricity improvers must not create
residual deposits that block the fuel system, e.g. injectors,
filters etc. Contact your fuel Supplier.
!M
CAUTION
A combination of water and sulphur will have a
corrosive chemical effect on fuel injection equipment.
It is essential that water is eradicated from the fuel
system when high sulphur fuels are used.
ENG-3-2
Table 2. Sulphur Content
Percentage of sulphur in
the fuel (%) Oil Change Interval
Less than 0.5 Normal
0.5 to 1.0 0.75 of normal
More than 1.0 0.50 of normal
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