F 450 2WD Super Duty V10-6.8L VIN Z Bi-Fuel (2001)
4. Apply maximum vacuum and maintain it for a minimum of three minutes with the engine speed set at idle.
5. Release the vacuum and remove the Vacuum Pump.
6. CAUTION: Do not over fill the reservoir.
Fill the reservoir.
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Use Motorcraft MERCON Multi-Purpose ATF XT-2-QDX or MERCON equivalent.