1999 FORD F SERIES MOTORHOME AND COMMERCIAL CHASSIS power steering

The ABS operates by detecting the
onset of wheel lockup during brake
applications and compensating for
this tendency. The wheels are
prevented from locking even when
the brakes are firmly applied. The
accompanying illustration depicts
the advantage of an ABS equipped
vehicle (on bottom) to a non-ABS
equipped vehicle (on top) during
hard braking with loss of front braking traction.
ABS warning lamp
The
ABSwarning lamp in the instrument cluster momentarily illuminates
when the ignition is turned on and the engine is off. If the light does not
illuminate momentarily at start up, remains on or continues to flash, the
ABS needs to be serviced.
With the ABS light on, the anti-lock
brake system is disabled and normal
braking is still effective unless the
brake warning light also remains
illuminated with parking brake
released. (If your brake warning lamp illuminates, have your vehicle
serviced immediately).
Using ABS
•In an emergency or when maximum efficiency from the ABS is
required, apply continuous full force on the brake. The ABS will be
activated immediately, thus allowing you to retain full steering control
of your vehicle and, providing there is sufficient space, will enable you
to avoid obstacles and bring the vehicle to a controlled stop.
•The Anti-Lock system does not decrease the time necessary to apply
the brakes or always reduce stopping distance. Always leave enough
room between your vehicle and the vehicle in front of you to stop.
•We recommend that you familiarize yourself with this braking
technique. However, avoid taking any unnecessary risks.
Hydraulic brake booster system (Hydroboost or Hydromax)
The Hydroboost and Hydromax systems receive fluid pressure from the
power steering pump to provide power assist during braking.
Driving
26

The Hydromax booster receives backup pressure from the reserve
system electric pump whenever the fluid in the power steering system is
not flowing. When the engine is OFF, the pump will turn on if the brake
pedal is applied, or if the ignition is turned to the ON position.
The sound of the pump operating may be heard by the driver, but this is
a normal characteristic of the system.
The reserve system provides reduced braking power, so the vehicle
should be operated under these conditions with caution, and only to seek
service repair and remove the vehicle from the roadway.
For Hydromax-equipped vehicles operating under normal conditions, the
noise of the fluid flowing through the booster may be heard whenever
the brake is applied. This condition is normal. Vehicle service is not
required.
If braking performance or pedal response becomes very poor, even when
the pedal is strongly depressed, it may indicate the presence of air in the
hydraulic system or leakage of fluid. Stop the vehicle safely as soon as
possible and seek service immediately.
Parking brake
Apply the parking brake whenever
the vehicle is parked. Push pedal
downward to set the parking brake.
The BRAKE warning lamp in the
instrument cluster illuminates and
remains illuminated (when the
ignition is turned ON) until the
parking brake is released.
Driving
27

Fuse/Relay
LocationFuse Amp
RatingDescription
Relay 1 — Daytime Running Lamps On/Off Relay
Relay 2 — Fuel Pump Relay
Relay 3 — Horn Relay
Relay 4 — Two Speed Fuel Pump Relay
Relay 5 — Blower Motor Relay
Relay 6 — Powertrain Control Module Relay
Diode 1 — Powertrain Control Module Diode
Diode 2 — Park Brake Diode
* Mini Fuses ** Maxi Fuses ***Vehicles with Hydromax brake assist
only
CHANGING THE TIRES
If you get a flat tire while driving, do not apply the brake heavily.
Instead, gradually decrease your speed. Hold the steering wheel firmly
and slowly move to a safe place on the side of the road.
Tire change procedure
Preparing to change the tire
To prevent the vehicle from moving when you change a tire, be
sure the parking brake is set, then block (in both directions) the
wheel that is diagonally opposite (other side and end of the vehicle) to
the tire being changed.
1. Park on a level surface.
2. Activate the warning flashers.
3. Place the gearshift in P (Park).
Roadside emergencies
45

Do not start your engine with the air cleaner removed and do
not remove it while the engine is running.
IDENTIFYING COMPONENTS IN THE ENGINE COMPARTMENT
6.8L V10 ENGINE
1. Engine coolant reservoir
2. Engine oil filler cap
3. Automatic transmission fluid dipstick
4. Engine oil dipstick
5. Air filter assembly
6. Brake fluid reservoir
7. Power steering fluid reservoir
ENGINE OIL
Checking the engine oil
Refer to the Scheduled Maintenance Guide for the appropriate intervals
for checking the engine oil .
1. Make sure the vehicle is on level ground.
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Maintenance and care
55

Continued operation will increase the engine temperature and the engine
will completely shut down, causing steering and braking effort to
increase.
Once the engine temperature cools, the engine can be re-started. Take
your vehicle to a service facility as soon as possible to minimize engine
damage.
When fail-safe mode is activated
You have limited engine power when in the fail-safe mode, so drive the
vehicle with caution. The vehicle will not be able to maintain high-speed
operation and the engine will run rough. Remember that the engine is
capable of completely shutting down automatically to prevent engine
damage, therefore:
1. Pull off the road as soon as safely possible and turn off the engine.
2. Arrange for the vehicle to be taken to a service facility.
3. If this is not possible, wait a short period for the engine to cool.
4. Check the coolant level and replenish if low.
Never remove the coolant reservoir cap while the engine is
running or hot.
5. Re-start the engine and take your vehicle to a service facility.
Driving the vehicle without repairing the engine problem
increases the chance of engine damage. Take your vehicle to a
service facility as soon as possible.
Maintenance and care
63

CHECKING AND ADDING POWER STEERING FLUID
Check the power steering fluid.
Refer to the Scheduled Maintenance
Guide for the service interval
schedules. If adding fluid is
necessary, use only MERCONAT F.
1. Start the engine and let it run until it reaches normal operating
temperature (the engine coolant temperature gauge indicator will be
near the center of the normal area between H and C).
2. While the engine idles, turn the steering wheel left and right several
times.
3. Turn the engine off.
4. Check the fluid level on the
dipstick. It should be between the
arrows in the FULL range on the
side of the dipstick with the words
MAX. HOT at the top. Do not add
fluid if the level is within this range.
5. If the fluid is low, add fluid in small amounts, continuously checking
the level until it reaches the FULL range. Be sure to put the dipstick
back in the reservoir.
ADD MAX. HOTFULL
Maintenance and care
64

MOTORCRAFT PART NUMBERS
Component 6.8L V10 engine
Air filter element FA-1634
Battery BXT-65-750
Fuel filter FG-986B
Oil filter FL-820-S
PCV valve EV-233
Spark plugs* AWSF-22E
*Refer to Vehicle Emissions Control Information (VECI) decal for spark
plug gap information.
REFILL CAPACITIES
Fluid Ford Part
NameApplication Capacity
Brake fluid High
Performance
DOT 3 Motor
Vehicle Brake
FluidAll Fill to line on
reservoir
Engine oil
(includes filter
change)Motorcraft
5W-30 Super
Premium Motor
OilAll 5.7L
(6.0 quarts)
Engine coolant
1Premium Engine
CoolantAll 29.0L
(30.6 quarts)
Power steering
fluidMotorcraft
MERCONAT FAll Keep in FULL
range on
dispstick
Rear axle
2Motorcraft SAE
75W140
Synthetic Rear
Axle LubricantDana 80 3.9L
(4.0 quarts)3
Dana 135 11.7L
(12.0 quarts)3
Fuel tank N/A All 284.0L
(75 .0 gallons)
Capacities and specifications
84

LUBRICANT SPECIFICATIONS
Item Ford part
nameFord part
numberFord
specification
Brake fluid High
Performance
DOT 3 Motor
Vehicle Brake
FluidC6AZ-19542-AB ESA-M6C25-A
and DOT 3
Engine coolant Ford Premium
Engine CoolantE2FZ-19549-AA
(in Oregon,
F5FZ-19549-CC,
in Canada,
Motorcraft
CXC-10)ESE-M97B44-A
Engine oil Motorcraft
5W-30 Super
Premium Motor
OilXO-5W30-QSP WSS-M2C153-G
with API
Certification
Mark
Automatic
transmission
(4R100)
1
Motorcraft
MERCONAT FXT-2-QDX MERCON
Power steering
fluidMotorcraft
MERCONAT FXT-2-QDX MERCON
Parking brake
assemblyMotorcraft
MERCONXT-2-QDX MERCON
Dana Axle Motorcraft SAE
75W140 High
Performance
Synthetic rear
axle lubricantF1TZ-19580-B WSL-M2C192-A
1Ensure the correct automatic transmission fluid is used. Transmission
fluid requirements are indicated on the dipstick or on the dipstick
handle. MERCONand MERCONV are not interchangeable. DO NOT
mix MERCONand MERCONV. Refer to your Scheduled Maintenance
Guide to determine the correct service interval.
Capacities and specifications
86