15
Maintenance
Removal of Soot and Heating Coil
In the heating process, fuel residue in the form of soot
deposits may develop between the heating coil pipe
and block air flow which will affect burner combustion.
When soot has been detected on visual observation,
the soot on the coil must be washed off after following
the coil removal steps (See Coil Removal).
Rupture Disk
If pressure from pump or thermal expansion should
exceed safe limits, the rupture disk will burst allowing
high pressure to be discharged through hose to ground.
When disk ruptures it will need to be replaced.
Fuel
Diesel fuel must be clean, fresh, meet fuel specifica-
tions and be sourced from a known and reputable
supplier. Clean, fresh and properly specified diesel fuel
will provide assurances of maximum engine perfor-
mance and maximum fuel injection system longevity.
The use of out-of-spec, dirty or questionable quality
diesel fuel will result in engine performance and start
ability problems as well as reductions in engine and fuel
injection system life.
Use clean fuel oil that is not contaminated with water
and debris. Replace fuel filter and drain tank every 100
hours of operation.
The fuel tank is for both the engine and burner. The
engine requires specific fuel recommendations which
should be used for both engine and burner.
Diesel engines are designed to operate on Ultra Low
Sulfur Diesel fuel. However, some geographical areas,
change the diesel fuel supply depot to No. 1 diesel fuel
in the winter months because of the cool winter
temperatures. No. 2 diesel fuel provides maximum
viscosity and lubricity but can have "waxing" problems
at lower temperatures. We expressly recommend the
use of No. 2 diesel fuels when temperatures are at or
above 14°F. We recommend that No. 1 diesel fuel be
used when temperatures are at or below 14°F. The use
of either EPA-high sulfur, off-highway diesel fuel or
EPA-low sulfur, on-highway fuel for non-CARB certified
engines is allowed. CARB certified engines must
consume only EPA-low sulfur diesel fuels conforming to
EPA 40 CFR 86-113-94.
We do not recommend the use of "heating oil", blended
fuel/waste engine oil or low grade diesel fuel of any
kind. The use of aviation fuels - JP4, JP5 or JP8 must
be approved on an application basis and is not recom-
mended for broad range commercial applications.
Fuel Control System
This machine utilizes a fuel solenoid valve located on
the fuel pump to control the flow of fuel to the combus-
tion chamber. The solenoid, which is normally closed, is
activated by a flow switch when water flows through it.
When the operator releases the trigger on the spray
gun, the flow of water through the flow switch stops,
turning off the electrical current to the fuel solenoid.
The solenoid then closes, shutting off the supply of fuel
to the combustion chamber. Controlling the flow of fuel
in this way gives an instantaneous burn-or-no-burn situ-
ation, thereby eliminating high and low water tempera-
tures and the combustion smoke normally associated
with machines incorporating a spray gun. Periodic
inspection, to insure that the fuel solenoid valve
functions properly, is recommended. This can be done
by operating the machine and checking to see that the
burner is not firing when the spray gun is in the OFF
position.
Fuel Pressure Adjustment
To control water temperature, adjust fuel pressure by
turning the regulating pressure adjusting screw
clockwise to increase, counterclockwise to decrease.
Do not exceed 200 psi.
NOTE: : When changing fuel pump, a bypass plug
must be installed in return port or fuel pump will not
prime.
Burner Nozzle
Keep the tip free of surface deposits by wiping it with a
clean, solvent saturated cloth, being careful not to plug
or enlarge the nozzle. For maximum efficiency, replace
the nozzle each season.
Engine Oil
Kubota recommends engine oil 10W-30 API rating of
CF or higher.
Landa SLT/SLX Diesel Dealer’s Manual 9.807-539.0 - AE
