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