DAF CF65, CF75, CF85 Series . Manual — part 183

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200351

1

Contents

DIAGNOSTICS

ΧΦ65/75/85 series

2

1

1 Diagnostics

CONTENTS

Page

Date

1.

TRACTIVE PROBLEMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 . . . . . 200351
1.1

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 . . . . . 200351

1.2

Acceleration test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 . . . . . 200351

1.3

Acceleration test form . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4 . . . . . 200351

1.4

Acceleration test using DAVIE-XD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5 . . . . . 200351

2.

CE ENGINE, GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 . . . . . 200351
2.1

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 . . . . . 200351

2.2

Fault-finding table, engine functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2 . . . . . 200351

2.3

Fault-finding table, vehicle functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6 . . . . . 200351

3.

CE-ENGINE COOLING SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1 . . . . . 200351
3.1

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1 . . . . . 200351

3.2

Fault-finding table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2 . . . . . 200351

4.

CE-ENGINE LUBRICATION SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1 . . . . . 200351
4.1

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1 . . . . . 200351

4.2

Fault-finding table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2 . . . . . 200351

5.

PE/XE ENGINE, GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1 . . . . . 200351
5.1

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1 . . . . . 200351

5.2

Fault-finding table, engine functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2 . . . . . 200351

5.3

Fault-finding table, vehicle functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-6 . . . . . 200351

6.

PE/XE-ENGINE COOLING SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1 . . . . . 200351
6.1

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1 . . . . . 200351

6.2

Fault-finding table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2 . . . . . 200351

7.

XE/PE-ENGINE LUBRICATION SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1 . . . . . 200351
7.1

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1 . . . . . 200351

7.2

Fault-finding table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-2 . . . . . 200351

DIAGNOSTICS

2

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200351

Contents

1

ΧΦ65/75/85 series

2

©

200351

1-1

Tractive problems

DIAGNOSTICS

ΧΦ65/75/85 series

2

1

1. TRACTIVE PROBLEMS

1.1 INTRODUCTION

There may be many reasons why a vehicle's
performance is below standard.

Some of these may be mechanical, but some
may be psychological in nature.
It is therefore important to identify the problem
properly.

Try to get as much information as possible from
the customer or driver.

-

When does the vehicle not perform properly?

-

What are the road or weather conditions
when this occurs?

-

What are the vehicle's loading conditions?

-

Is the vehicle not being compared with a
vehicle with completely different
specifications, for instance engine power?

-

Is the vehicle being driven in the correct
engine speed range?

If the answers are unsatisfactory, ask the
customer or driver for facts.

-

Tachograph cards of trips

-

Reliable consumption figures of trips

Following correct identification of the complaint,
vehicle performance can be tested by an
acceleration test.

If the vehicle fails to pass the acceleration test, a
boost pressure curve may be plotted as an aid to
identifying the cause.

Note:
Checking the boost pressure will in general only
make sense after the vehicle has covered at least
20,000 km.

DIAGNOSTICS

1-2

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200351

Tractive problems

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ΧΦ65/75/85 series

2

1.2 ACCELERATION TEST

1.

Use the "Acceleration test form", which is
included in the Workshop Manual.

2.

Do the checks set out under "Before starting
the acceleration test".

3.

Establish a test route where the difference
between the measured times in both
directions does not exceed 15%. If the
difference in time exceeds 15%, find another
test route.

4.

Establish the starting and end points on the
selected test route, to ensure that exactly the
same route can be taken in both directions.
Do the entire test at least twice and take the
average time.

5.

Run the drive train at operating temperature
(drive for at least 15 minutes with a loaded
vehicle).

Note:
When switched on, the air compressor and
fan consume 10 to 15 kW engine power on
average. During the test try to avoid these
two consumers being switched on.

6.

Connect DAVIE and follow the instructions
given.

7.

Fully depress the accelerator pedal during
the acceleration test.