D7W TS.pdf - Espar
D7W TS.pdf - Espar D7W TS.pdf - Espar
35 Note when re-installing: - Use new O ring and seal - Lubricate prior to installing - After installation, bleed the water circuit 8B. Overheat Switch Removal Model 20 1673 25 1666 25 1667 Figure IV R - Before removing, reduce the excess pressure in the cooling system by opening the radiator filler cap - To prevent the coolant from flowing out pinch the water supply and return hoses shut. - Remove the cover - Remove the 12 pin plug. - Remove pins 11 and 12 from plug housing (see Figure IV M). - Unscrew the overheat switch Note when re-installing: - Use new O ring and seal - Lubricate prior to installing - After installation, bleed the water circuit 9. Partial-Load Resistor Removal - Remove the cover - Remove the 12 pin plug - Remove pins 5 and 6 from plug housing (see Figure IV M) - Remove the retaining clips from the partial-load resistor - Remove the partial-load resistor Figure IV S
36 10. Water Pump Replacement - Before removing the pump, reduce the excess pressure in the cooling system by opening the radiator filler cap. - To prevent the coolant from flowing out pinch the water supply and return hoses shut. - Remove the cover. - Remove the 12 pin plug. - Remove pins 1 and 2 from plug housing (see Figure IV M). - Undo the fastening clip of the water pump. - Remove the water pump. Note when re-installing: - Use new O ring - Lubricate prior to installing - After installation, bleed the water circuit 11. Combustion Air Blower Removal - Remove the cover. - Remove the 12 pin plug. - Remove pins 3 and 4 out of the plug housing (see Figure 4 M). - Loosen the fastening screw and remove the combustion air blower. Figure IV T Figure IV U Note when re-installing: - Use new O-ring - Lubricate before installing 12. Flame Tube Removal - Before removing the flame tube, reduce the excess pressure in the cooling system by opening the radiator filler cap - To prevent the coolant from flowing out pinch the water supply and return hoses shut - Remove the heater - Remove the combustion air blower - Remove the glow plug cable and - in the case of 24 volt heaters - also the cable from the series resistor - Remove the flame sensor - Undo the clamping clip and remove the burner Note when re-installing: - Use new O ring - Lubricate prior to installing - After installation, bleed the water circuit Figure IV V
- Page 2 and 3: Table of contents D7W Boxed I. Intr
- Page 4 and 5: 3 2. Heater Warnings Warning To Ins
- Page 6 and 7: 5 4. Principal Dimensions D7W Boxed
- Page 8 and 9: 7 II. Installation Procedures 1. He
- Page 10 and 11: 9 When being used to provide bunk h
- Page 12 and 13: 11 B) Fuel Metering Pump If the pum
- Page 14 and 15: 13 5. Electrical Connections Cautio
- Page 16 and 17: 15 7. Operating Switches A Push/Pul
- Page 18 and 19: 17 III Heater Operation 3. Running
- Page 20 and 21: 6. Operational Flow Chart 19
- Page 22 and 23: 21 IV. Maintenance Troubleshooting
- Page 24: 23 C. Self Diagnostics Troubleshoot
- Page 29 and 30: 28 Table 1 - Components Resistance
- Page 31 and 32: Figures IV F 30
- Page 33 and 34: 32 Figure IV I When replacing the g
- Page 35: 34 Figure IV O 7A. Flame Sensor Rep
- Page 39 and 40: Universal Model Boxed Model 25 1807
- Page 41 and 42: 40 3. Universal Models 25 1807, 25
- Page 43 and 44: D7W Universal Model 25 1807 42
- Page 45 and 46: D7W Boxed with Espar Heat Exchanger
- Page 47 and 48: D7W Boxed Freightliner Model 25 180
- Page 49 and 50: 48 D7W Parts Diagram Main Heater Co
- Page 51 and 52: 50 Universal Parts Models 25 1807 2
- Page 53 and 54: 52 Ref. No. Description Part Number
- Page 55 and 56: 54 Ref. No. Description Part Number
- Page 57 and 58: 56 Ref. No. Description Part Number
36<br />
10. Water Pump Replacement<br />
- Before removing the pump, reduce the excess<br />
pressure in the cooling system by opening the<br />
radiator filler cap.<br />
- To prevent the coolant from flowing out pinch the<br />
water supply and return hoses shut.<br />
- Remove the cover.<br />
- Remove the 12 pin plug.<br />
- Remove pins 1 and 2 from plug housing<br />
(see Figure IV M).<br />
- Undo the fastening clip of the water pump.<br />
- Remove the water pump.<br />
Note when re-installing:<br />
- Use new O ring<br />
- Lubricate prior to installing<br />
- After installation, bleed the water circuit<br />
11. Combustion Air Blower Removal<br />
- Remove the cover.<br />
- Remove the 12 pin plug.<br />
- Remove pins 3 and 4 out of the plug housing<br />
(see Figure 4 M).<br />
- Loosen the fastening screw and remove the<br />
combustion air blower.<br />
Figure IV T<br />
Figure IV U<br />
Note when re-installing:<br />
- Use new O-ring<br />
- Lubricate before installing<br />
12. Flame Tube Removal<br />
- Before removing the flame tube, reduce the excess<br />
pressure in the cooling system by opening the<br />
radiator filler cap<br />
- To prevent the coolant from flowing out pinch<br />
the water supply and return hoses shut<br />
- Remove the heater<br />
- Remove the combustion air blower<br />
- Remove the glow plug cable and - in the case of 24<br />
volt heaters - also the cable from the series resistor<br />
- Remove the flame sensor<br />
- Undo the clamping clip and remove the burner<br />
Note when re-installing:<br />
- Use new O ring<br />
- Lubricate prior to installing<br />
- After installation, bleed the water circuit<br />
Figure IV V
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