Perkins 1106D Troubleshooting Manual page 57

KENR6201-01
Recommended Actions
Fuel Quality
1. The quality of the fuel that is used in the engine
will affect the rate of fuel consumption. Refer to
"General Fuel Information" in the Operation and
Maintenance Manual, "Refill Capacities".
2. If the fuel is not of an acceptable quality, drain
the fuel system and replace the fuel filters. Refill
the fuel system with fuel of an acceptable quality.
Refer to the applicable sections in the Operation
and Maintenance Manual.
3. If the fuel is of an acceptable quality, refer to
"Quality of Oil".
Quality of Oil
1. The nominal viscosity of the lubricating oil that
is used in the engine will affect the rate of fuel
consumption. The viscosity of lubricating oil is
defined by the SAE grade of the lubricating oil.
The grade of the lubricating oil must be correct
for the ambient conditions. Lubricating oil that is
intended for use in high ambient temperatures
will have a negative effect upon the rate of fuel
consumption in cold ambient temperatures. Refer
to "Engine Oil" in the Operation and Maintenance
Manual, "Refill Capacities".
2. The actual viscosity of the lubricating oil that is
used in the engine will change throughout the
service life of the oil. Lubricating oil that is heavily
contaminated will have a negative effect upon the
rate of fuel consumption.
3. If the oil is not of an acceptable quality or if the
oil has exceeded the service life, drain the oil
system and replace the oil filters. Refill the oil
system with oil of an acceptable quality. Refer
to the applicable sections in the Operation and
Maintenance Manual.
4. If the oil is of an acceptable quality, refer to "Low
Engine Temperature".
Low Engine Temperature
1. The operating temperature of the engine will affect
the rate of fuel consumption. Operation of the
engine below the correct temperature will increase
fuel consumption. Failure of the water temperature
regulator can prevent the engine from operating at
the correct temperature.
This document is printed from SPI². Not for RESALE
2. If the engine operating temperature is low, check
the operation of the water temperature regulator. If
the water temperature regulator does not operate
correctly, a new water temperature regulator must
be installed. Refer to Disassembly and Assembly,
"Water Temperature Regulator - Remove and
Install".
Air Inlet and Exhaust System
Leakage of gas or an increased restriction in either
the air intake or the exhaust system can reduce
the flow of combustion gas through the engine. A
change in the flow of combustion air into the engine
adversely affects combustion efficiency and the rate
of fuel consumption.
1. Check the air intake system for leakage or
restrictions. Refer to Systems Operation, Testing
and Adjusting, "Air Inlet and Exhaust System".
2. Check the exhaust system for leakage or
restrictions. Refer to Systems Operation, Testing
and Adjusting, "Air Inlet and Exhaust System".
3. Repair all defects. Verify that the repair has
eliminated the fault.
Reduced Pressure of Intake Air
1. If the pressure of the intake air at the intake
manifold is lower than normal, either the speed
of the engine will need to be higher or more fuel
must be injected in order to produce the same
power. Either of these conditions will increase the
fuel consumption.
2. Check the pipe from the outlet of the turbocharger
compressor to the intake manifold for leaks. If
necessary, repair any leaks.
3. Check for the correct operation of the wastegate
in the turbocharger. Refer to Systems Operation,
Testing and Adjusting, "Turbocharger Wastegate -
Test".
4. If the turbocharger is suspected as being faulty,
replace the turbocharger. Refer to Disassembly
and Assembly, "Turbocharger - Remove" and
Disassembly and Assembly, "Turbocharger -
Install".
Excessive Valve Lash
Excessive valve lash will cause a change in the
timing of the opening and closing of the inlet and
exhaust valves. Excessive valve lash can cause
a reduction of the flow of combustion air into the
engine. Reduced flow of combustion air will increase
the fuel consumption rate.
57
Troubleshooting Section