7.Make sure the replacement diode is a direct re- placement for the old one.

8.Install the replacement diode by reversing the above procedure and noting the following:

a.Wipe the surface clean where the replacement diode is to be installed.

NOTE

The thermal interface pads must be properly aligned when replacing the diode.

b.Position the thermal interface pad between the diode and contact surface where the diode will be installed.

CAUTION

Diodes can overheat if not properly installed.

c.Install the diode. Torque the nut securing the diode to 34 in-lbs (3.8 Nm).

d.Reinstall the nut and washer securing the re- placement diode wire lead to the PC Board.

5.11 Hose Assembly Replacements

This subsection describes the replacement of the various Hose Assemblies used in the Power Supply. The replace- ment part numbers and detail drawings are in Section 6 as noted in each Hose Assembly replacement instructions. For a block diagram of the Power Supply Hose Assem- blies refer to Appendix XV.

A.Secondary Water Hose (Check Valve to T- Fitting) Assembly Replacement

The Secondary Water Hose Assembly goes from the Check Valve on the Secondary Water Solenoid Assem- bly to the T-Fitting on the Secondary Gas Pressure Gauge at the front panel. Replace the Hose Assembly using the following procedure:

NOTE

Refer to Subsection 6.08, Upper Chassis Replace- ment Parts for part numbers and detail drawing.

1.Remove the Right Side Panel per Section 5.04-B.

2.Disconnect the Hose Assembly from the Check Valve on the Secondary Water Solenoid Assembly.

3.Disconnect the other end of the Hose Assembly from the T-Fitting on the Check Valve from the Secondary Gas Pressure Gauge at the front panel.

4.Remove the Hose Assembly from the unit.

5.Install the replacement Hose Assembly by revers- ing the above procedure.

B.Coolant Return Hose (RETURN Connector to Radiator) Assembly Replacement

The Coolant Return Hose Assembly goes from the RE- TURN Connector to the inlet side of the Radiator. Re- place the Hose Assembly using the following proce- dure:

NOTE

Refer to Subsection 6.05, Front Panel/Cahassis Replacement Parts for part numbers and detail drawing.

1.Remove the Right Side Panel per Section 5.04-B.

2.Disconnect the Hose Assembly from the rear of the front panel RETURN connector.

3.Locate the other end of the Hose Assembly at the inlet of the Radiator.

4.Disconnect the Hose Assembly from the Radiator.

5.Remove the Hose Assembly from the unit.

6.Install the replacement Hose Assembly by revers- ing the above procedure.

C.Coolant Supply Hose (Pump to Pressure Gauge) Assembly Replacement

The Coolant Supply Hose Assembly goes from the Pump to a T-Fitting at the Pressure Gauge. Replace the Hose Assembly using the following procedure:

NOTE

Refer to Subsection 6.08, Upper Chassis Replace- ment Parts for part numbers and detail drawing.

1.Remove the Right Side Panel per Section 5.04-B.

2.Disconnect the Hose Assembly from the T-Fitting at the rear of the front panel Pressure Gauge As- sembly.

3.Disconnect the other end of the Hose Assembly from the Pump Assembly.

4.Remove the Hose Assembly from the unit.

5.Install the replacement Hose Assembly by revers- ing the above procedure.

D.Coolant Supply Hose (Pump to Pressure Gauge Connection) Assembly Replacement

The Coolant Supply Hose Assembly goes from the Pressure Gauge T-Fitting to the front panel Coolant Pressure Gauge connection. Replace the Hose Assem- bly using the following procedure:

Manual 0-2533

47

REPLACEMENT PROCEDURES

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Thermal Comfort 3000 manual Hose Assembly Replacements
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3000 specifications

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