DAF 95XF. Manual — part 378
4
TECHNICAL DATA
XF-engine fuel system
2-2
2.2 TIGHTENING TORQUES
Fuel pump
Fuel pump coupling nut (pump side)
P 7000 (M20 x 1.5)
195 Nm
P 8500 (M24 x 1.5)
215 Nm
Bolts for attaching fuel pump to support
60 Nm
Clutch plates / fuel pump drive attachment
bolts
Attachment bolts
110 Nm + 60
_ angular displacement
Bolts should not be re-used; always use new
bolts.
Drive clamping piece clamping bolt
100 Nm + 60
_ angular displacement
Never re-use bolt: always use new bolt.
Injectors
Injector union nut
45 Nm
Clamping piece attachment bolt
30 Nm + 60
_ angular displacement
Bolt should not be re-used; always use new
bolt.
Injector pipes
Injector pipes union nut
25 Nm
0
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4
XF-engine intake/exhaust system
TECHNICAL DATA
3-1
3. XF-ENGINE INTAKE/EXHAUST SYSTEM
3.1 GENERAL
Explanation, GARRETT turbocharger type
designation
Example of type designation:
GT42-94S/54NPS/1.44-84
GT42
Turbine type designation
94
Maximum compressor wheel
diameter
S
Wastegate model
54
Compressor wheel trim
NPS
Version with intake side without
compressor housing by-pass
PS
Version with intake side with
compressor housing by-pass
1.44
Dimensions, turbine housing
84
Turbine wheel trim
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TECHNICAL DATA
XF-engine intake/exhaust system
3-2
Explanation, K.K.K. turbocharger type
designation
Example of type designation:
K31-3971QYBKB22.91DCAYD
K31
Turbine build series
39
Diameter of compressor wheel
3.9 inch
71
Diameter ratio of compressor
wheel d/d
Q
Compressor wheel 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 wastegate
2 = without wastegate
1
Turbine trim figure:
2 = d/d = 89.5
(trim 80)
0 = d/d = 87
(trim 76)
1 = d/d = 84
(trim 70)
3 = d/d = 79
(trim 62)
D
Turbine wheel development letter
C
Turbine housing development
number
A
Turbine housing variant
Y
Turbine inlet flange dimension
Y = dimension for a 12.6
litre engine
W = dimension for a 9.2 litre engine
T = dimension for a 6.2 litre engine
D
Turbine housing material:
B = GG 40
D = Simo
F = Nirisist d2
H = Nirisist d3
K = Nirisist d5
0
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XF-engine intake/exhaust system
TECHNICAL DATA
3-3
Turbocharger
Stud bolt attachments
Copaslip (DAF No. 1284344)
GARRETT wastegate
Movement of control rod at 1.85
ᐔ 0.05 bar
1 mm
K.K.K. wastegate
Movement of control rod at 2.10 bar
3.5 mm
ᐔ 0.6
Exhaust back pressure
At full-load engine speed
90 mbar
Inlet underpressure
At full-load engine speed
25 - 45 mbar
3.2 TIGHTENING TORQUES
Turbocharger
Connection to exhaust manifold
60 Nm
(2)
Bend on turbocharger
40 Nm
Heat shield attachment bolts
15 Nm
(1)
Turbine housing clamping plate attachment nut
15 Nm
Air inlet
Air inlet hose clamps
12 Nm
(1)
Apply Loctite 243 to secure
(2)
Apply Copaslip to secure
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