Northern Lights OM150C12 Operator's Manual - page 20
18
OM150C12 11/11
Servicing
There is a chamber at the top of the pump and at
the bottom that holds fuel. This fuel is pressurized
in each chamber when the pump camshaft rotates.
Excess fuel goes through the overflow orifice
(14-B)
back to the fuel tank. The fuel temperature
sensor
(14-D)
measures the temperature of the
pump housing. Fuel outlets
(14-C)
are on the top
and bottom of the pump.
SP14. TURBO BOOST
1. This check measures the amount of air the turbo
is pushing into the engine. It should be done by an
authorized dealer every 500 hours.
2. On the inlet manifold there is a 1/8" NPT threaded
port. Remove the plug and install the boost gauge
hose. Refer to your engine specifications for correct
pressure.
SP26. CRANKCASE VENT SYSTEM
1. Check the red filter service indicator button daily -
if it pops up the filter element needs to be changed.
After changing the element, unscrew the clear plastic
cover on the button and push the indicator down to
reset it, then replace the cover.
Note: This service should be performed with the
engine shut down. The vacuum in the filter canister
because of engine operation may make it difficult to
take apart.
Normally, the filter element should be changed every
750 hours.
COOLING REQUIREMENTS
1. To meet cooling system protection requirements, the
coolant solution must consist of:
a. Quality water
b. Ethylene glycol concentrate (EGC ) commonly
known as antifreeze.
c. Supplemental coolant additives (SCA's).
2. A coolant solution of ethylene glycol concentrate
(EGC-antifreeze), quality water and supplemental
coolant additives (SCA's) MUST be used YEAR
ROUND to protect against freezing, boil-over, liner
erosion or pitting and to provide a stable,
noncorrosive environment for cooling system
components.
3. Ethylene glycol coolant concentrate (antifreeze)
normally DOES NOT contain the SCA chemical
inhibitors needed to control liner pitting or
erosion, rust, scale, and acidity.
LINER EROSION (PITTING)
1. Cylinder liner walls
(Figure 16-A)
which are in con-
tact with engine coolant
(Figure 16-B)
can be eroded
or pitted unless the proper concentration and type of
SCA's are present in the coolant. Water pump
impellers are also susceptible to pitting.
Reproduced by permission of Deere & Company, c2004. All rights reserved.
RG12459C
Figure 15
High Pressure Common Rail Operation
Two high pressure pump delivery lines
(Figure 15-A)
deliver fuel to the high pressure common rail. Fuel
is transported to the electronic injectors through the
high pressure common rail delivery lines
(15-E)
. The
fuel pressure inside the rail is detected by the fuel rail
pressure sensor
(15-B).
The ECU uses this sensor in
monitoring the fuel pressure to determine timing of the
pump control valve on the high pressure fuel pump. If
unusually high pressure occurs within the HPCR, the
pressure limiter
(15-C)
is used to release the excess
pressure and drain fuel back to the tank. The
maximum fuel flow to the electronic injectors is
controlled by the flow dampers
(15-D)
and help prevent
damage if the electronic injector fails or a high
pressure leak develops, by shutting off fuel to the
electronic injector in trouble.
SP13. TURBOCHARGER
1. Check for air leaks every 100 hours. Air leakage
will lower engine output and may cause black
exhaust smoke and soot.
2. Listen along air line while engine is running.
A whistling or hissing sound indicates leakage.
3. Leakage on the pressure side, between turbo and
engine, can be found by applying soapy water to
the air line.
4. Tighten the hose clamps, replace hose or gaskets as
required.
5. Check to see that the lubrication and cooling lines
are tight and without leaks.