Front-end PTO, direct
The table below shows the most relevant data with regard to the direct front-end PTO for the LF45 and LF55 vehicle series.
Specifications for front-end PTO, direct
 
 
 
LF45
 
LF55
 
Angle of engine in relation to chassis side members
3.5°
3.5°
Maximum angles of drive shaft
2 x 6°
2 x 6°
Maximum transmitted torque
250 Nm
250 Nm
Maximum transmitted power
40 kW
40 kW
Maximum added mass inertia
0.2 kgm2
0.2 kgm2
Maximum unbalance
100 gmm/kg
100 gmm/kg
Any modifications made to bumper or cab tilting system to enable a pump to be mounted, are subject to approval from DAF.

W arrangement of drive shaft

Z arrangement of drive shaft

Installation dimensions, front-end PTO, direct
Based on SAE J1946
 
Flange location, front-end PTO, direct
 
 
Dimensions:
(see figure)
 
LF45
 
LF55
14 - 16t
 
LF55
18 - 19t
 
Dimension
V
A
1275
1325
1375
,,
A
(1) 
446
496
636
 
 
(2) 
536
586
636
,,
B
 
932
982
1032
,,
C
(1) 
91
131
136
 
 
(2) 
96
136
136
,,
D
 
145
145
145
,,
E
 
170 x 150
170 x 150
170 x 150
,,
F
 
120
160
160
∠ α
3.5°
3.5°
3.5°
∠ β
3.5°
3.5°
3.5°
(1)
FR engines
(2)
GR engines

Flange location dimensions, front-end PTO, direct

Flange dimensions, front-end PTO, direct, LF Series

Front-end PTO, indirect
Specifications for front-end PTO, indirect
 
Vehicle series 
 
LF and
CF65
 
CF75
with airco
 
CF75
 
CF85
and XF
 
Maximum power take-off via coolant pump [kW]:
- at engine idling speed
- at maximum engine speed
-
-
-
-
2.2
6
-
-
Maximum power take-off
via crankshaft pulley [kW]
15
50
50
50
Maximum added mass inertia
[kgm2]
0.2
0.03
0.03
0.05
Maximum unbalance [gmm/kg]
100
125
125
125
Maximum distance between most forward pulley and front of cylinder block [mm]
150
180
180
200
Misalignment (max. 4 mm)
1:120
1:120
1:120
1:120
Any modifications made to engine and chassis are subject to approval from DAF. 
- Crankshaft pulley (SELCO 6624)
A twin-belt pulley on PR engine or triple belt pulley on MX engine for driving a compressor, alternator or hydraulic system pump can be fitted to the crankshaft by the bodybuilder. A drawing of the pulley is available from DAF. When this pulley is fitted, the fan will in most cases be moved forward. This should be compensated for. A twin belt pulley is available to all FR engines and GR 220 engine ex-factory.
 
 
LF45 - LF55 - CF65
 
CF75
 
CF85
 
Pulley diameter
310 mm
300 mm
265 mm
Number of grooves
2 x SPA / XPA
2 x DIN7753-AV13
3 x DIN7753-AV13
Positions of power take-offs

Before a crankshaft pulley is fitted, the mounting face on the vibration damper must be completely flat and clean. So any traces of paint should be removed. The belt pull must not run parallel to the motion of the pistons but must be in the area left and right of the engine indicated in the drawing below.
- Coolant pump pulley
On CF75-85 and XF vehicles without air conditioning system, one coolant pump pulley is available for the drive of an auxiliary user. For maximum power take-offs, see the overview.
- Preparation for generator
In particular for temperature-controlled transport, the LF55, CF65, CF85 and XF Series can be prepared ex-works for the use of a generator.
In the case of the LF55 and CF65 (SELCO 0590-17kW, SELCO 0591-24kW), the vehicle has:
  • generator mounting brackets (cast components from wk15 2012 onwards)
  • modified engine cross member
  • an extra crankshaft pulley
  • uprated engine mounts.
  • driven pulley, belt, tensioner and generator mounting brackets (loose supplied)
  • modified anti roll bar with the 24 kW generator
 
In case of the CF85 and XF Series (SELCO 6723), the vehicle has:
  • an extra crankshaft pulley,
  • an adapted oil sump to make room for a generator and
  • two shorter oil filters instead of the standard oil filter.
Within the room available, a drive ratio of 1:2 can be realised. This results in a maximum generator capacity of 24 kVA. Because of the wide variety of generators and cooling motors, DAF does not supply the complete equipment. Generator must be installed and aligned in accordance with the suppliers installation guidelines. The bodybuilder will therefore have to complete the equipment, taking account of the following guidelines:
  • V-belt tension: 500 - 600 N for CF85 and XF Series, 600 - 700 N for CF75 Series (per belt)
  • extra vibration dampers must be fitted, using the existing hole pattern on the engine bracket.
If this option is not ordered ex-works, the vibration damper mounting hub must be replaced.
 
 
LF - CF65 Series
 
CF75
 
CF85 - XF Serie
 
Pulley diameter
280 mm
300 mm
265 mm
Number of grooves
 
2 x SPA / XPA
3 x SPA / XPA
Recommended V-belt
Poly V-belt
OPTIBELT SPA - 13
or
OPTIBELT XPA - 13
OPTIBELT SPA - 13
or
OPTIBELT XPA - 13
Typical generator preparation for LF55 and CF65

- Preparation for hydraulic pump (SELCO 9543)
For the PR and MX engine, an engine bracket with a standard ISO pump connection is available for the fitting of a hydraulic pump. The bracket is provided with a pulley and a belt tensioner. The pulley is driven from a pulley on the crankshaft.
Technical data:
  • Maximum power take-off: 50kW
  • Reduction ratio: 1 : 1
  • Belt tension first assembly: 1500N.
    Belt tension to be checked after 30 min. 750N min. - 950N max.
  • Pump connection according ISO 7653, splines according ISO14 - 8x32x36
  • Modified oil sump
Engine PTO
The DAF engine PTO for the LF and CF series is a clutch-independent PTO. It was specially developed to drive superstructure equipment which require low-medium output (LF and CF65), and medium-high outputs (CF75, CF85 and XF105) and is used for most of the driving hours and/or for a high number of operating hours when the vehicle is stationary.
The tables show the specifications and the locations for connecting this PTO. The engine PTO protrudes above the chassis members. So make sure that the PTO itself, the drive shafts and the hydraulic pump do not get in the way of parts of the chassis, the sub-frame or the superstructure.
Engine PTO specification
 
 
 
 
Vehicle type
 
Speed factor
 
Direction of rotation
 
Maximum torque
[Nm/min-1]
 
Service life
[Hrs]
 
Remark
 
Note
 
LF and CF 65 Series
with GR engine
1.00
Clockwise (1)
300 / 1500 (2)
1100
< Prod. wk 2011.17
3
400 / 1500 (2)
1100
> Prod. wk 2011.17
3
200 / 1500 (2)
5500
 
3
()
Viewed looking towards the rear of the engine
(2)
The engine PTO does not contain a torque limiting fail safe device. If the PTO device fitted to the engine is likely to exceed 400 Nm in a failure condition, a fail safe device such as a shear pin should be incorporated into the PTO device.
()
Direct pump connection, ISO 7653
 
 
Engine PTO specifications
 
 
Vehicle type
 
Speed factor
 
Maximum torque
 
 
 
Anti- clockwise (1)
 
Clockwise(1)
 
[Nm]
 
PTO revs
 
 
 
 
 
CF75 Series
-
0.932
990
1600
 
 
1.412
-
660
2300
 
 
CF85 and XF105 Series
-
-
-
 
 
 
1.20
-
800
1800
 
 
(1)
Viewed looking towards the rear of the engine
With released clutch a torque of about 13Nm will remain on the PTO output due to internal friction. Only applicable for the MX engine PTO.
 
Switch on conditions CF85 and XF105 engine PTO:
The switch on/off conditions are controlled by the BBM
Max. power 85kW
Min. engine speed: 650 RPM
Max. engine speed: 1000 RPM
Vehicle speed under 50 km/h
Locations for engine PTO connections
 
Vehicle Series
 
Connection
 
Location
 
X
 
Y
 
Z
 
H
 
L
 
LF 45 Series
Direct pump connection
517
166
290
376
258
LF 55 Series
Direct pump connection
467
329
415
LF 55 Series 19T /
CF 65 Series
Direct pump connection
417
329
CF75 series
Flange
651
40
367
493
347
Direct pump connection
593
372
CF85 and XF105 series
Flange
653
139
339
450
320
Direct pump connection
612
343
Engine PTO connections

The engine PTO is available with:
  • DIN 120 flange, 8-hole, CF75/85 Series
  • DIN 100 flange, 6-hole, CF75/85 Series
  • ISO 7653 (direct) pump connection. LF - CF Series. It is a dry connection, there is no oil feed from the engine. The splines should be lubricated with grease and serviced in line with the PTO device supplier's requirements. Shaft length from mounting face nominal 55mm, 70mm max., te ensure correct spline engagement.
The maximum moment of inertia (incl.drive shaft) for this DAF engine PTO is 0.025 kgm2. In case this value is exceeded a flexible coupling is required.
When a drive shaft is used , the own frequency of the complete system must be at least 250Hz.
PTO devices should be secured to the REPTO housing using M10 bolts with a minimum thread engagement of 20mm with an assembly torque of 46Nm
Engine PTO control
Engine PTO control, including a safeguard against engaging the PTO while the engine is running, is available on request (CF75 only).
Engine PTO on LF and CF65 Series is without control, so continuously running.
The CF75 engine PTO must only be engaged when the engine is NOT running.
The MX engine PTO should be ordered without clutch, when used for concrete mixer application, in order to prevent the PTO to be disengaged in case of low air pressure.
Flywheel PTO (NMV) only available with POV
Vehicle series
 
Gearbox
 
PTO types
 
Speed factor
 
Maximum torque
[Nm]
 
Flange location
 
Note
 
X
 
Y
 
Z
 
CF75
16S1800 TO
NMV221
0.98
2000
913
38
304
1.55
1300
CF85
16S2200 TO
16S2500 TO
0.98
2000
1032
38
294
1.55
1300
(1)
Flange, diameter 150 mm, 8-hole, 130 mm pitch
(2)
Service life of PTO at maximum torque: approx. 2000 operating hours
(3)
Maximum initial speed 2000 rpm
(4)
Maximum torque during continuous operation at engine speed of 1500 rpm
(5)
Service life of PTO at maximum torque: approx. 1500 operating hours
  • An operating speed between 800 and 1000 RPM requires a minimum moment of inertia of 0,3 Kgm².
  • In case the moment of inertia is unknown the operating engine speed should be over 1200 RPM.
  • Permitted initial torque: Ts = 1600 Nm.
  • Switch on revs. max. 2000 RPM for iNMV = 0,98 and max. 1300 RPM when iNMV = 1,55
  • Max. moment of inertia at 1200 RPM at the output flange: 1 kgm2 for iNMV = 1,55 and 3 kgm2 when iNMV = 0,98
Location of flange of flywheel PTO.

Direction of rotation is anti-clockwise, viewed looking towards the rear of the gearbox. During prolonged heavy use of the flywheel PTO, the gearbox oil temperature must not rise above 110°C. To ensure that this condition is met, an air cooler or oil cooler may be necessary.
The flywheel PTO can be engaged and disengaged by using a multiple disc clutch (fitted as standard) while the engine is running. 
When this PTO is disengaged, a residual torque of approx. 11 Nm (engine speed 1300 rpm and oil temperature 40°C) continues to act on the drive shaft. If necessary, a disc brake can be fitted on the drive shaft.