DAF CF65, CF75, CF85 Series . Manual — part 405
©
200416
6-1
XE engine fuel system
TECHNICAL DATA
ΧΦ65/75/85 series
4
0
6. XE ENGINE FUEL SYSTEM
6.1 GENERAL
Gallery pressure
Fuel level element
Overview of injectors
Fuel lift pump
Pump housing
At starting speed
approx. 0.5 - 1.0 bar
At idling speed
approx. 2.5 - 3.0 bar
At maximum no-load engine speed
approx. 6.5 - 7.0 bar
Angular displacement
86
Resistance value
- Full
approx. 500
-
•
approx. 355
-
∂
approx. 234
-
approx. 137
- Not used
approx. 33
Vacuum relief valve opening pressure
10 - 20 mbar
Pressure relief valve opening pressure
200 - 300 mbar
Engine type
Number of
holes in
injector
Nozzle no.
Hole diameter
Bar filter
Opening
pressure
XE 250 C1
8
1081
0.182
Yes
300 + 10 bar
XE 280 C1/C3
8
1081
0.182
Yes
300 + 10 bar
XE 315 C1/C3
8
1081
0.182
Yes
300 + 10 bar
XE 355 C1
8
1286
0.182
Yes
300 + 10 bar
Fuel lift pump pressure
7.0 - 8.0 bar
Pressure relief valve opening pressure
approx. 8.5 bar
Weight, including camshaft and pump units
approx. 70 kg
Pressure relief valve opening pressure
circa 5.5 - 6 bar
TECHNICAL DATA
6-2
©
200416
XE engine fuel system
0
ΧΦ65/75/85 series
4
6.2 TIGHTENING TORQUES
The tightening torques specified in this section
are different from the standard tightening torques
cited in the overview of the standard tightening
torques. The other threaded connections not
specified must therefore be tightened to the
torque cited in the overview of standard
tightening torques.
When attachment bolts and nuts are replaced, it
is important that - unless stated otherwise - these
bolts and nuts are of exactly the same length and
property class as those removed.
Injector pipes
Fuel filter housing
Injectors
(1) Use bolts once only.
Pump housing
(1) Use Loctite 243
Pump units
Fuel lift pump
(1) Use Loctite 243
Injector pipe union nuts
30 Nm
Fuel leak-off pipe union
20 Nm
Fuel filter cap
25 Nm
Clamping piece attachment bolt
30 Nm + 60
angular displacement
(1)
Leak-off pipe banjo bolt
20 Nm
Pressure relief valve
20 Nm
Attachment bolts to connect pump housing to
engine block
60 Nm
Pump housing rear cover attachment bolts
30 Nm
Attachment bolts for pump camshaft locking plate
30 Nm
Attachment bolts for pump housing sealing plates
30 Nm
Attachment bolts for pulse disk on camshaft
30 Nm
(1)
Attachment bolt, camshaft sensor
8 Nm
Non-return valve
45 Nm
Fuel temperature sensor
20 Nm
Bolts for attaching pump units to pump housing
46 Nm
Pump unit electrical connection
1 Nm
Attachment bolts to connect fuel lift pump to
pump housing
30 Nm
(1)
©
200416
7-1
XE engine inlet/exhaust system
TECHNICAL DATA
ΧΦ65/75/85 series
4
0
7. XE ENGINE INLET/EXHAUST SYSTEM
7.1 GENERAL
Explanation of K.K.K. turbocharger type
designation
Example of type designation:
K31-39 71 Q Y B KB
22.9 1 D C A Y D
K31
Turbine build series
39
diameter of compressor rotor 3.9 inch
71
diameter ratio of compressor rotor d/d
Q
Compressor rotor development letter
Y
Compressor housing development letter
B
Compressor housing variant
K
k = compressor housing with recirculation (= ported shroud)
a = compressor housing with no recirculation (= non-ported shroud)
b
b = recirculation variant
a = no recirculation
22
surface of turbine housing throat (cm
2
)
9
turbine housing version number
9 = with control bypass
2 = without control bypass
1
Turbine trim figure:
= d/d = 89.5 (trim 80)
= d/d = 87 (trim 76)
= d/d = 84 (trim 70)
= d/d = 79 (trim 62)
D
Turbine rotor development letter
C
Turbine housing development number
A
Turbine housing variant
Y
Turbine inlet flange size
y = dimension for a 12.6 litre engine
w = size for a 9.2 litre engine
t = size for a 6.2 litre engine
D
Turbine housing material:
b = GG 40
d = Simo
f = Nirisist d2
h = Nirisist d3
k = Nirisist d5
TECHNICAL DATA
7-2
©
200416
XE engine inlet/exhaust system
0
ΧΦ65/75/85 series
4
Explanation of GARRETT turbocharger type
designation
Example of type designation: GT40-88S/54NPS/
0.95-84
Turbocharger
GARRETT wastegate
K.K.K. wastegate
Exhaust back pressure
Inlet underpressure
GT40
Turbine type designation
88
Maximum compressor rotor diameter
S
Wastegate model
54
Compressor rotor trim
NPS
Version with intake side without compressor housing bypass
PS
Version with intake side with compressor housing bypass
0.95
Turbine housing size
84
Turbine rotor trim
Stud bolts for fastening
Copaslip
Movement of control rod at 1.60
≥ 0.05 bar
1.0 mm
Movement of control rod at 1.95
≥ 0.05 bar
3.5
≥ 0.05 mm
At full-load engine speed
90 mbar
At full-load engine speed (clean air filter)
50 mbar
At full-load engine speed (clogged air filter)
75 mbar
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