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 decrease the driver’s effort in steering 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:
•Spring leaf damage
•Spring sag
•Abnormal looseness
•Damaged seals
The following changes indicate a need to inspect and service your
vehicle:
•Changes in steering action
•Hard steering
•Excessive free play
•Unusual sounds when turning or parking
If the steering wanders or pulls
This condition can be caused by any of the following conditions:
•Underinflated tire(s) on any wheel(s)
•Front end out of alignment
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130
•Total vehicle out of alignment (i.e. rear axle[s] out of alignment with
front axle)
•Improper adjustment in the steering gear
•Vehicle overloaded or unevenly loaded
•High crosswinds
•High crown in center of road
•Components in steering linkage loose or worn
•Wheel bearings improperly adjusted
•Excessive lash in steering shaft or universal joints
If the vehicle steers hard
Hard steering can be caused by any of the following conditions:
•Underinflated tire(s) on any wheel(s)
•Vehicle overload
•Misalignment of the front tires
•Lack of lubricant in the front spindle bearings or linkage components
•Low oil level in the power steering system
•Broken or loose power steering pump direct drive connection
•Malfunctioning relief valve in power steering gear or steering pump
•Malfunctioning power steering pump
•Restriction in power steering lines
•Improperly set turn stops
•Air 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.
Air suspension-equipped vehicles are equipped with a dryer module
which needs to be opened monthly to remove moisture from the system.
Driving
131
11. Inspect the air induction system for loose fitting, damaged or missing
components and repair as necessary.
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.
•Do not paint the mating face of the hub/drum.
•Do not paint the two-element swiveling lug nuts or wheel stud.
•Do not allow an excessive thickness of paint to build between the disc
wheel mounting surfaces.
•Do not install disc wheels where the paint has not fully cured.
•At 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.
•To 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.
Maintenance and Specifications
210
An inflated tire and rim can be very dangerous if improperly
used, serviced or maintained. To avoid serious injury, never
attempt to re-inflate a tire which has been run flat or seriously
under-inflated without first removing the tire from the wheel assembly
for inspection. Do not attempt to add air to tires or replace tires or
wheels without first taking precautions to protect persons and
property.
Refer to the Ford Service Manual or the regulations of the Occupational
Safety and Health Administration (OSHA) for appropriate procedures
and cautions.
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
Maintenance and Specifications
213
ADD and FULL marks indicated on the hub. Do not overfill. Overfilling
can result in oil on brake linings.
Refer to your general maintenance information section 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.
Tire/wheel rim selection and inflation pressures
Tire Size, Load
Range (PR)Wheel Width
(in.) and TypeSingle Rear Axle: Max. Tire
and Wheel Capacity kg. (lb.)
kPa @ (psi) (cold) by Axle
Tubeless Type Radial Ply Front Rear
10R22.5 F (12) 7.50 10H
(I.S.O.)10 300 (4 671)
698 10019 280 (8 745)
698 100
10R22.5 G (14) 7.50 10H
(I.S.O.)10 300 (4 671)
698 10021 000 (9 525)
711 115
11R22.5 G (14) 8.25 10H
(I.S.O.)12 080 (5 478)
703 10522 520 (10 213)
703 105
245/70R19.5 6.75 8H (I.S.O.) 10 300 (4 671)
698 10019 280 (8 745)
698 100
11X20 (16) 7.50 10H
(I.S.O.)12 080 (5 478)
703 10522 520 (10 213)
703 105
MINOR TROUBLESHOOTING GUIDE
Diesel engine
For troubleshooting information, refer to the diesel engine operator’s
manual.
If engine won’t crank
For troubleshooting information, refer to the engine operator’s manual.
If engine cranks but won’t start
For troubleshooting information, refer to the engine operator’s manual.
If engine runs hot
For troubleshooting information, refer to the engine operator’s manual.
Maintenance and Specifications
214
* 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
•Initial change—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
•Replace the fuel filter.*
50 000 KM / 30 000 MILES
•Replace the engine spin-on coolant filter.*
•Repack and adjust the front wheel bearings—grease-filled hubs.
65 000 KM / 40 000 MILES
•Replace the fuel filter.*
80 000 KM / 50 000 MILES
•Disassemble the single check valve (SC-2) and the automatic drain
valve (DB–2)—clean and inspect the valve for wear and
deterioration.
100 000 KM / 60 000 MILES
•Replace the engine spin-on coolant filter.*
•Oil filled front hubs—drain oil, adjust bearings and refill the front
hubs with oil. (Not required when equipped with optional synthetic
lubricant.)
•Drain the oil, adjust the bearing and refill with axle lubricant—oil
filled hubs.
•Replace the fuel filter.*
•Change the manual transmission oil—Eaton 5 and 6 speeds only.
(Not required when equipped with optional synthetic lubricant.)
General Maintenance Information
234
110 000 KM / 70 000 MILES
•Replace the engine spin-on coolant filter.*
•Replace the engine coolant.* See the engine manufacturer’s operating
guide for supplemental corrosion inhibitor specifications.
130 000 KM / 80 000 MILES
•Replace the fuel filter.*
150 000 KM / 90 000 MILES
•Replace the engine spin-on coolant filter*.
•Repack and adjust the front wheel bearings—grease-filled hubs.
•Change the lubricant in the manual shift transmission–7 speed
Spicer. (Not required when equipped with optional synthetic
lubricant.)
•Change the power steering fluid and filter.
160 000 KM / 100 000 MILES
•Disassemble the single check valve (SC-3) and the automatic drain
valve (DB–2)—clean and inspect the valves for wear and
deterioration.
•Lube the clutch release and the cross shaft lever.
•Replace the fuel filter.*
•Change the rear axle lubricant. (Not required when equipped with
optional synthetic lubricant.)
400 000 KM / 250 000 MILES
•Change the rear axle lubricant when equipped with optional synthetic
lubricant.
500 000 KM / 300 000 MILES
•Disassemble the air dryer, replace the desiccant and check the
mounting of the dryer to the vehicle (if equipped).
Please continue with these scheduled maintenance intervals for your
vehicle.
* Shown intervals are for Powerstroke engine only. Refer to Caterpillar
and Cummins Owner Manuals for intervals for their respective engines.
General Maintenance Information
235