Drain all the air brake reservoirs
daily, completely to 0 kPa/psi, by
opening the draincock at the bottom
of the tanks. Close draincock after
complete draining. Air tanks
equipped with automatic moisture
ejector valves may also be drained
manually as required to maintain a
dry air system. Contact your dealer
if you are unsure of the air reservoir
locations or the draining procedure.
STEERING
Your vehicle is equipped with power steering. Power steering uses energy
from the engine to help steer the vehicle.
Never hold the steering wheel to the extreme right or the extreme left
for more than a few seconds when the engine is running. This action
could damage the power steering pump.
Suspension and steering
The suspension and steering linkage in your vehicle should be inspected
periodically for the following:
²Spring leaf damage
²Spring sag
²Abnormal looseness
²Damaged seals.
The following changes indicate a need to inspect and service your
vehicle:
²Changes in steering action.
²Hard steering.
²Excessive free play.
²Unusual sounds when turning or parking.
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124
If the steering wanders or pulls
This condition can be caused by any of the following conditions:
²Underinflated tire(s) on any wheel(s)
²Front end out of alignment
²Total vehicle out of alignment (i.e. rear axle[s] out of alignment with
front axle)
²Improper adjustment in the steering gear
²Vehicle overloaded or unevenly loaded
²High crosswinds
²High crown in center of road
²Components in steering linkage loose or worn
²Wheel bearings improperly adjusted
²Excessive lash in steering shaft or universal joints
If the vehicle steers hard
Hard steering can be caused by any of the following conditions:
²Underinflated tire(s) on any wheel(s)
²Vehicle overload
²Misalignment of the front tires
²Lack of lubricant in the front spindle bearings or linkage components
²Low oil level in the power steering system
²Broken or loose power steering pump direct drive connection
²Malfunctioning relief valve in power steering gear or steering pump
²Malfunctioning power steering pump
²Restriction in power steering lines
²Improperly set turn stops
²Air entrapped in power steering system fluid
AIR SUSPENSION SYSTEM (IF EQUIPPED)
The on-highway air suspension system is designed to provide a superior
ride, outstanding driver comfort while minimizing wear on the cab, frame
and payload.
The height control valve automatically keeps the vehicle at a constant
level due to load changes and uneven road surfaces.
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125
SERVICING YOUR WHEELS AND TIRES
Wheel assembly
Your vehicle is fitted with hub
piloted wheels and two-element
swiveling lug nuts (20 & 22 mm).
Do not use taper type wheels or ball
seat wheel nuts.
²Do not paint the mating face of the hub/drum.
²Do not paint the two-element swiveling lug nuts or wheel stud.
²Do not allow an excessive thickness of paint to build between the disc
wheel mounting surfaces.
²Do not install disc wheels where the paint has not fully cured.
²At wheel changes, ensure mounting faces are clean and free of rust,
dirt and excess paint.
If fasteners are needed, use only Ford recommended replacement parts.
²To maintain the desired
torque/tension relation between
nut body and flange, it is
necessary to use clean engine oil
meeting Ford specification
WSS-M2C153-G between nut body and flange. Lubricate the nut body
and flange any time a wheel is removed.
The M20 & M22 wheel nuts are right-hand threads. Refer to the
following chart for approved wheel lug nut torque.
Wheel type Bolt size Wheel nut torque
10-hole disc
285.75 mm bolt circleM22 (22 by 1.5 mm) 610-677 Nm
(450-500 lb-ft)
8-hole disc
19.5x6.75 mm bolt
circleM20 (20 by 1.5 mm)
610-677 Nm
(450-500 lb-ft)
The disc wheel nuts on your vehicle were tightened before delivery.
Recheck torque of nuts at 160 km (100 miles) and 800 km (500 miles) of
new vehicle operation or any time a wheel is removed. Reset to
recommended torque levels.
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179
Tire inflation pressure must not exceed the recommendations of
the axle, tire and/or wheel rim manufacturer for the specific
load, speed and application. The inflation pressures on the tire sidewall
do not take the wheel rim capabilities into consideration.
Never use a rim of different manufacture or any different size or
type than original rims.
Try to replace tires in pairs on the same axle shaft. Tires larger or
smaller than originally installed may affect the accuracy of the
speedometer. Consult your dealer about the need to change the switch
setting on the back of the speedometer.
Front wheel alignment
If abnormal tire wear or ride and handling characteristics such as vehicle
lead or wander are experienced with properly inflated tires, the front
end alignment should be checked.
Wheel bearing care
Front and rear wheel bearings are adjustable to correct for bearing and
spindle wear. Long bearing life depends upon proper adjustment and
correct lubrication. If bearings are adjusted too tightly (preloaded) they
will overheat and wear rapidly. Loose adjustment will cause pounding
and will contribute to uneven tire wear, steering difficulties and
inefficient brake operation.
Refer to the Ford Service Manual applicable to your vehicle for proper
tightening procedures and torque specifications.
Periodically check the oil level on oil filled front bearing hubs. If
necessary, add oil through the filler plug so the oil level is between the
ADD and FULL marks indicated on the hub. Do not overfill. Overfilling
can result in oil on brake linings.
Refer to your Scheduled Maintenance Guide for fluid level checks and
change intervals for the front hubs.
Your front hubs may be filled with an optional synthetic fluid which
allows use of the extended service intervals. A green colored filler plug
identifies use of the synthetic fluid.
Maintenance and care
182
Check every oil
changeOil change
intervals are as
follows:
Powerstroke - 10 000;
Caterpillar - 15 000;
Cummins - 15 000
(refer to the
Caterpillar and
Cummins service
manuals for further
instructions and
information)Clutch system
Lubricate the clutch release cross shaft and all
linkages
Check the clutch fluid
Fuel system
Drain the accumulated water or sediment from
the fuel tank(s)
Steering system
Lubricate the steering shaft(s), U-joints and
splines when equipped with grease fittings
Lubricate the front axle spindle pins
Lubricate the steering linkage when equipped
with grease fittings
Grease the power steering gear output shaft
* Coolant protection checks should be made just prior to the onset of
freezing weather, where applicable. If coolant is dirty or rusty in
appearance, the system should be drained, flushed and refilled with the
prescribed solution of cooling system fluid and water. Use only
permanent type coolant that meets Ford specifications ESE-M97B18-C.
See the engine manufacturer's operating guide for supplimental
corrosion inhibitor specifications.
In addition to the items to be performed daily or at each oil change, the
following need to be completed as specified:
8 000KM / 5 000 MILES
²Initial change Ð change the lubricant in the manual shift transmission
± 5 speed and 6 speed Eaton manual transmission. (Not required
when equipped with optional synthetic lubricant.)
32 000 KM / 20 000 MILES
²Replace the fuel filter.*
50 000 KM / 30 000 MILES
²Replace the engine spin-on coolant filter.*
²Repack and adjust the front wheel bearings Ð grease-filled hubs.
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216
65 000 KM / 40 000 MILES
²Replace the fuel filter.*
80 000 KM / 50 000 MILES
²Disassemble the single check valve (SC-2) and the automatic drain
valve (DB±2) Ð clean and inspect the valve for wear and
deterioration.
100 000 KM / 60 000 MILES
²Replace the engine spin-on coolant filter.*
²Oil filled front hubsÐ drain oil, adjust bearings and refill the front
hubs with oil. (Not required when equipped with optional synthetic
lubricant.)
²Drain the oil, adjust the bearing and refill with axle lubricant Ð oil
filled hubs.
²Replace the fuel filter.*
²Change the manual transmission oil Ð Eaton 5 and 6 speeds only.
(Not required when equipped with optional synthetic lubricant.)
110 000 KM / 70 000 MILES
²Replace the engine spin-on coolant filter.*
²Replace the engine coolant.* See the engine manufacturer's operating
guide for supplemental corrosion inhibitor specifications.
130 000 KM / 80 000 MILES
²Replace the fuel filter.*
150 000 KM / 90 000 MILES
²Replace the engine spin-on coolant filter*.
²Repack and adjust the front wheel bearings Ð grease-filled hubs.
²Change the lubricant in the manual shift transmission ± 7 speed
Spicer. (Not required when equipped with optional synthetic
lubricant.)
²Change the power steering fluid and filter.
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217