DAF CF65, CF75, CF85 Series . Manual — part 184
©
200351
1-3
Tractive problems
DIAGNOSTICS
ΧΦ65/75/85 series
2
1
Result of first acceleration test
If the acceleration time is not achieved, first carry
out the following work.
-
Check the fuel system for the presence of air.
-
Replace or clean the air filter element.
-
Check the setting of the wastegate on the
turbocharger (if present).
-
Check the exhaust brake butterfly valve for
correct operation.
-
Check the charge cooler exterior for dirt
deposits.
-
Clean the water separator (if present).
-
Check that the primer pump is attached.
-
Replace the fuel fine filter.
-
Check the suction pipe of the tank for
clogging by coarse dirt.
-
Check the fuel tank for fouling. Clean with a
steam cleaner, if necessary.
-
Check the air intake system for any leaks.
-
Check the exhaust system for any leaks.
-
Check the exhaust system for blockages by
measuring the exhaust back pressure.
-
Check the turbocharger impellers on the
compressor and turbine sides for damage
and for deposits of salt or any other
contaminants.
-
Check both the valve clearance and the DEB
clearance (if present).
-
Check the injector pipes for damage.
-
Check the fuel gallery/rail pressure.
-
Check the fuel lift pump output.
-
Check whether the right type of components
has been fitted. This includes turbocharger,
injectors, etc.
-
Check the opening pressure of the injectors
(if possible).
Repeat the acceleration test. If necessary, plot a
boost pressure curve.
DIAGNOSTICS
1-4
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200351
Tractive problems
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ΧΦ65/75/85 series
2
1.3 ACCELERATION TEST FORM
General data
Test conditions
Vehicle data
TOPEC data
Customer's name:__________________________________________
Chassis number:______________
Registration number:______
Weather conditions: dry / rain / wet road / drizzle
Wind force: none / average / strong
Outside temperature:_______
|
C
Vehicle type:________
Trailer type:_________
Superstructure:____________
Total combination weight: ________kg
Total vehicle height: _________m
Cab type: day / sleeper / space / superspace
Aerodynamics: roof spoiler / fenders / front spoiler / skirts / sun visor / ____________________
Engine type:________
Gearbox type:_____________
Transmission:_________
Rear axle type:_______________
Transmission:_______________
Tyre size: front:__________
rear:____________________
Tyre make:_______________
Energy:____________________
Space between cab and superstructure/trailer: _________________m
Starting speed: ___________km/h
End speed: _____________km/h
Gear selection:___________
Acceleration time: __________sec.
Measured time of outward
journey:
1: _______sec.
2: _______sec.
Average time of outward journey: ________sec.
3: _______sec.
Average time: _________sec.
Measured time of return
journey:
1: _______sec.
2: _______sec.
Average return time: _________sec.
3: _______sec.
©
200351
1-5
Tractive problems
DIAGNOSTICS
ΧΦ65/75/85 series
2
1
1.4 ACCELERATION TEST USING DAVIE-XD
The acceleration test can also be carried out
using DAVIE-XD. Collect the necessary data and,
after starting DAVIE-XD, go to the engine
management system and carefully follow the
instructions in DAVIE-XD for carrying out the test
correctly.
The test results should be saved to diskette after
each test.
}
The acceleration test in DAVIE-XD
should only be started when the
vehicle is stationary. As the
communication between the
accelerator pedal sensor and the
unit will be broken for a short time
when DAVIE is started up, this can
lead to dangerous situations when
the vehicle is being driven.
When driving, never start a "direct test" or "guide
diagnosis".
DIAGNOSTICS
1-6
©
200351
Tractive problems
1
ΧΦ65/75/85 series
2
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