FORD 2001 F-550 v.1 - Manual (Page 188)

3. Turn off the engine and remove the key.
4. Block the wheels to prevent the vehicle from moving unexpectedly.
Working with the engine on
• Automatic transmission:
1. Set the parking brake and ensure the gearshift is securely latched in P
(Park).
2. Block the wheels to prevent the vehicle from moving unexpectedly.
Do not start your engine with the air cleaner removed and do
not remove it while the engine is running.
• Manual transmission:
1. Set the parking brake, depress the clutch and place the gearshift in
neutral.
2. Block the wheels to prevent the vehicle from moving unexpectedly.
Do not start your engine with the air cleaner removed and do
not remove it while the engine is running.
The cooling fan is automatic and may come on at any time.
Always disconnect the negative terminal of the battery before
working near the fan.
Maintenance and care
188