FORD 1999 F-350 - Manual (Page 176)

2. Visually inspect the fluid level.
3. If necessary, add brake fluid until
the level reaches MAX. Do not fill
above this line.
4. Use only a DOT 3 brake fluid
certified to meet Ford specifications.
Refer to Lubricant specifications in the Capacities and specifications
chapter.
Brake fluid is toxic.
If you use a brake fluid that is not DOT 3, you will cause
permanent damage to your brakes.
Do not let the reservoir for the master cylinder run dry. This
may cause the brakes to fail.
CLUTCH FLUID (IF EQUIPPED)
Check the clutch fluid level. Refer to the Scheduled Maintenance Guide
for the service interval schedules.
Use only a DOT 3 brake fluid designed to meet Ford specifications. Refer
to Capacities and specifications.
For vehicles equipped with the 5–speed manual transmission,
during normal operation, the fluid level in the clutch reservoir should
remain constant. If the fluid level drops, maintain the fluid level at the
step in the reservoir.
For vehicles equipped with the 6–speed manual transmission,
during normal operation, the fluid level in the clutch reservoir will drop
slightly. As this occurs, maintain the fluid level at the step in the
reservoir.
MAX
Maintenance and care
176