F 550 4WD Super Duty V10-6.8L VIN S (2000)
6. Disconnect the heater hose couplings from the underbody auxiliary heater.
7. Disconnect the heater inlet and outlet hose couplings from the heater core.
INSTALLATION
1. To install, reverse the removal procedure.
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Lubricate the coolant hoses with Rubber Suspension Insulator Lube E25Y-19553-A or equivalent meeting Ford specification
ESF-M99B112-A.