Webasto DBW 46 Repair Manual download pdf (Page 66)

Webasto Thermo & Comfort N.A., Inc. 66 www.techwebasto.com

INSTRUMENTS AND TOOLS DBW 2010/2020/300 COOLANT HEATERS

10.5 NOZZLE WRENCH

Used for replacing high-pressure fuel nozzle.

Part Number 66971A

10.6 FUEL PRESSURE GAUGE

Used for checking and adjusting the fuel pressure

delivered to the nozzle.

Part Number 600190

10.7 GREASE AND LOCKING VARNISH

• LDS 18 Special - used for lubricating the reduction

gearing of the fuel pump drive.

• Dielectric Silicone Grease - used to protect electrical

terminals and connectors from corrosion.

• Red Locking Varnish - used to indicate setting

positions such as on the air intake locking screw once

adjusted.

160

200

240

120

LDS18 Special

Bearing Grease

Red Locking Varnish

P/N 154245

Dielectric Silicone

Grease

2 oz. Tube

P/N 143820

45 grams

1 2 ... 61 62 63 64 65 66 67 68 69 70 71 72

Contents Page 3
6. Functional Adjustments 31 4
7. Circuit Diagrams 35 4
8. Servicing 43 4
9. Repair 49 5
10.Instruments and Tools 65 6
11.Product Information 67 6
1. INTRODUCTION 7
ORRECTIONS AND IMPROVEMENTS 8
2. GENERAL DESCRIPTION 9
DBW 2010 10
DBW 2020 11
DBW 300 11
2.1 PARTS OF THE HEATER 12
Flame Detector 13
Photo Disc 13
Locking screw 13
Combustion air 13
Drive motor 14
Fan wheel 14
DBW 2020/300 14
Strainer 15
Pressure 15
Regulation 15
Plunger Valve 15
Nozzle Holder 16
Power consumption 17
130 Watts 17
Red - 12 V 17
Green - 24 V 17
OOLANT CIRCULATING PUMP 18
3. FUNCTIONAL DESCRIPTION 19
4. TECHNICAL DATA 20
ECHNICAL DATA OF THE HEATERS 21
Scholastic 22
5. TROUBLESHOOTING 23
* INERTIA SWITCH: 24
NSTRUCTIONS FOR FAULT FINDING 26
5.3.6 HEATER SMOKES 29
5.3.7 HEATER SMOKES 30
6.1 GENERAL 31
6.2 ADJUSTMENTS 31
If necessary 32
Millimeters 32
Setting Gauge 32
P/N 310646 32
6.2.4 IGNITION COIL CHECK 33
6.2.5 FUEL PUMP CHECK 33
UEL SOLENOID VALVE CHECK 34
OZZLE BLOCK PRE-HEATER CHECK 34
CONTROL UNIT 35
ONNECTOR BLOCK A 42
ONNECTOR BLOCK B 42
ONNECTOR BLOCK C 42
8. SERVICING 43
3. Torque nuts (3) to: 44
INSTALLATION 45
8.7 REMOVAL AND INSTALLATION 46
8.8 FIRST OPERATION 47
UEL SUPPLY SYSTEM, BLEEDING 48
9. REPAIR 49
0.15 ± 0.05 mm 50
(.006 ± .002 inch) 50
Hexagon nut 50
1 Overheat Fuse 51
3 Temperature Limiter 51
+ Black Wire 55
– Brown Wire 55
9.2.13.1 REMOVAL 57
9.2.13.2 INSTALLATION 57
DBW 2020 / 300 60
9.3.1 REMOVAL 62
9.3.2 DISASSEMBLING 62
9.3.3 ASSEMBLING 62
9.3.4 INSTALLING 62
9.4.1 REMOVAL 64
9.4.2 DISASSEMBLING 64
9.4.3 ASSEMBLING 64
9.4.4 INSTALLING 64
10. INSTRUMENTS AND TOOLS 65
LDS18 Special 66
Bearing Grease 66
Product Information 67

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