Grove Published 01-29-2015, Control # 512-01 7-9
TMS700E SERVICE MANUAL POWER TRAIN
FUEL SYSTEM
Description
The fuel system consists of the fuel tank, fuel filter-water
separator, injection fuel pump, the fuel injectors, and fuel
cooler.
Fuel Tank
The fuel tank is located on the left side of the crane. The tank
has a capacity of about 380 liters (100 gal). Two connections
on the tank provide for fuel supply to the engine and return of
surplus fuel from the engine. The tank is equipped with a
spin-type filler cap and a fuel quantity sender unit which
provides a signal to a quantity indicator on the instrument
panels.
Injection Fuel Pump
The fuel oil is finely atomized as it is injected into the cylinder
and ignited by the heat of compression. It is metered also,
before injection, to meet the load requirements imposed
upon the engine.
Surplus fuel, returning from the injectors, is bypassed back
through the fuel cooler, to the fuel tank. The continuous flow
of fuel through the injectors helps to cool the injectors and to
purge air from the system.
Fuel Filter-Water Separator
The fuel filter-water separator (Figure 7-4) removes
impurities from the fuel and also removes water from the fuel
before it reaches the engine.
The fuel mixture passes through the outer wrap of the first
stage of the filter paper, where large droplets of water,
removed from the fuel, are formed. The water droplets drain
into a void between the two paper elements and to a
reservoir in the bottom of the housing, where it can be
drained through a petcock.
The fuel level will initially only rise to a low level in the clear
filter bowl, as the filter becomes dirty the fuel level will rise.
When the fuel level reaches the indicated mark, filter
replacement is required.
Draining
The sump of the fuel filter-water separator should be drained
daily, 30 minutes after the engine is shut down, to remove
any water and sediment. Adhere to the following procedure.
1. Place a suitable container under the filter and open the
drain plug.
2. Drain until fuel appears.
3. Close the drain plug.
Filter Replacement
When the filter is clean, fuel will be seen at a very low level
through the transparent filter cover. As the filter element
plugs, the fuel level will rise. When the fuel level reaches the
top of the cover it is time to change the filter element.
Maintenance
Fuel Tank
The fuel tank should be kept filled, especially overnight, to
reduce condensation to a minimum. Refer to the applicable
engine manual for the recommended schedule for draining
any water or sediment from the tank.
Removal
1. Place a suitable container under the fuel tank and drain
all fuel from the tank.
2. Tag and disconnect the two lines from the tank.
3. Disconnect the electrical lead from the fuel quantity
sender unit.
4. Remove the hardware securing the tank in place and
using a suitable lifting device, remove the fuel tank.
5. If a new tank is to be installed, remove the two fittings,
the fuel quantity sender, and steps from the tank and
install them on the new tank.
Installation
1. Position the tank and install the hardware securing the
tank in place.
2. Connect the electrical lead to the fuel quantity sender
unit.
3. Connect the two lines to the fittings on the tank in
accordance with the identification marks made during
removal.
NOTE: ISX engines require the fuel return line be
connected to the lower port on the side of the tank,
QSM engines require the fuel return line be
connected to the top port.
4. Service the tank.
Reference Only
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