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manufacturer, to ensure that any additional body lights and accessories
are connected to circuits that are both appropriate and not overloaded.
No modification should be made to any vehicle control system without
first contacting your dealer.
SUSPENSION INSPECTION
Note:Do not adjust air suspension height to any setting other than the
specified setting. Altering the height setting will change the driveline
angle and may result in unwarrantable component damage, such as
transmission component damage.
Verify drive axle air suspension height and height control valve
performance at engine lube oil change intervals.
Periodically:
•Check condition of spring leaves for evidence of fatigue, bending or
breakage.
•Check condition of suspension mounting brackets and bushings.
•Check that torque rod mounting fasteners are tight.
•Check to be sure the suspension alignment is maintained at all times.
•Check U-bolts after the chassis has been operating under load for
1,000 miles (1,600 km) or six months, whichever comes first, the
U-Bolt nuts must be re-torqued. The U-Bolt nuts thereafter must be
re-torqued every 36,000 miles (58,000 km). The U-Bolt and nut
threads and seats should be cleaned and lubricated to ensure a “like
new” condition when re-torquing.
Note:See theU-Bolt Nut Torquechart later in this section.
Supporting your vehicle for service
When performing service repairs on your vehicle, first prepare the
vehicle by doing the following:
1. Park the vehicle on a level concrete floor.
2. Set the parking brake and block the wheels to prevent the vehicle
from moving.
3. Select a jack with a rated capacity sufficient to lift and hold up the
vehicle.
4. Raise the vehicle with the jack applied to the axle(s). DO NOT use the
bumper as a lifting point.
5. Support the vehicle with floor stands under the axle(s). If the axle or
the suspension are being serviced, support the vehicle with floor stands
under the frame side-members, preferably between the axles.
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3. Re-torque the nuts to 100 ft. lb. (136 N•m), using a diagonal pattern.
4. Re-torque the nuts to 200 ft. lb. (271 N•m), using a diagonal pattern.
5. Re-torque the nuts to 400 ft. lb. (542 N•m), using a diagonal pattern.
(For vehicles equipped with 14ACC, 14 ADN and 14ADP axles, do not
use Step 6.)
6. Re-torque the nuts to 425 ft. lb (576 N•m), using a diagonal pattern.
(For vehicles equipped with 14ACC, 14 ADN and 14ADP axles.)
7. Use the same diagonal pattern with each U-bolt nut re-torque.
Spring U-bolt checks
Check U-bolt nuts and re-torque every 36,000 miles (58,000 km) after
initial 1,000 miles (1,600 km) re-torque. The U-bolt and nut threads and
seats should be cleaned and lubricated to ensure peak condition when
re-torqued.
DRIVESHAFT
At the regular lubrication interval, check the universal joints for any
evidence of wear or looseness. Should driveshaft vibrations occur, stop
the vehicle immediately to avoid possible hazardous consequences or
damage to other components.
REAR AXLE LUBRICANT
Refer to theScheduled Maintenance Guidechapter for rear axle
lubricant level checks and lubricant change intervals.
Your rear axle may be filled with an optional synthetic lubricant which
allows the use of extended service intervals. A tag on the filler plug will
identify the use of the synthetic lubricant.
Use only a lubricant that meets manufacturer specifications (refer to
Lubricant specificationsin this chapter).
Use of a non-approved rear axle lubricant may cause internal axle
component damage.
Checking the rear axle lubricant level
1. Park the vehicle on level ground.
2. Set the parking brake and shift into N (Neutral) (automatic
transmission) or 1 (First) (manual transmission) and turn the engine off.
3. Clean any dirt from around the rear axle filler plug.
4. Remove the filler plug and inspect the lubricant level.
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5. The lubricant level should be up to the bottom of the filler plug
opening.
6. If necessary, add enough lubricant through the filler plug opening so
that the lubricant level is at the bottom of the opening.
7. Clean and install the filler plug securely.
Draining and refilling the rear axle lubricant
1. Drain the rear axle while the lubricant is warm.
2. Park the vehicle on level ground.
3. Set the parking brake and shift into N (Neutral) (automatic
transmission) or 1 (First) (manual transmission) and turn the engine off.
4. Clean any dirt from around the rear axle filler and drain plugs.
5. Remove the filler and drain plugs and drain the lubricant into a
suitable container. Dispose of all used automotive fluids in a responsible
manner following your local authorized standards.
6. Clean and install the drain plug securely.
7. Add enough lubricant through the filler plug opening so that the
lubricant level is up to the bottom of the opening.
8. Clean and install the filler plug securely.
WHEELS
General
Wheel bearings should be inspected, lubricated and adjusted at regular
intervals. This is especially important if operating in deep sand, mud, or
water. Refer toLubricant specificationsin this chapter.
When installing wheel balance weights, they must be mounted on the
dome-side of the wheel only. Failure to do so may result in loss of wheel
weight and/or damage to brakes or wheels.
Important:Remember to replace the wheel air valves when the road
tires are replaced at the end of their useful life.
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ComponentLubrication
typeViscosity /
Ambient
temperature /
NotesEquivalent
Ford part
name / number
Eaton-Spicer axle,
Spicer axle - Front
axle wheel bearing
grease, tie rod
ends, drag link,
kingpin and
bushingEP2 Lithium
complex-based
moly grease (or
equivalent)
GC/LB NLGI #2
multi-purpose
lithium complex
greaseNote:
Eaton-Spicer and
Meritor Easy Steer
axles: With chassis
load on axle, force
grease through
thrust bearings;
then with axle
lifted clear of the
floor, force grease
between kingpin
and bushing
surfaces.Motorcraft
Premium Long
Life Grease /
XG-1-C
Steering
Power steering
fluidMERCONV
Automatic
Transmission
Fluid— MERCONV/
XT-5-QMC
Steering gear Ross
TAS - Output SealGC/LB NLGI #2
lithium
complex-based
moly grease or
multi-purpose
lithium complex
grease— Motorcraft
Premium Long
Life Grease /
XG-1-C
Steering column
U-joints / slip jointGC/LB NLGI #2
lithium
complex-based
moly grease or
multi-purpose
lithium complex
grease— Motorcraft
Premium Long
Life Grease /
XG-1-C
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ComponentLubrication
typeViscosity /
Ambient
temperature /
NotesEquivalent
Ford part
name / number
Windshield washer
Washer fluid WSB-M8B16-A2 — Motorcraft
Premium
Windshield
Washer
Concentrate /
ZC-32-A
Transmission
Eaton-Fuller Petroleum oil:
Engine oil API-SL
or API-CF
(MIL-L-2104E or
MIL-L-46152E)SAE 50:
Above 10°F
(–12°C)—
SAE 40:
Below 10°F
(–12°C)—
Mineral gear oil:
API-GL-1 (rust
and oxidation
inhibited)SAE 80W–90:
Above 10°F
(–12°C)—
SAE 75W:
Below 10°F
(–12°C)—
Synthetic oil:
Eaton,
Roadranger
synthetic CD-50
transmission fluidCD SAE 50:
All temperatures—
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ComponentLubrication
typeViscosity /
Ambient
temperature /
NotesEquivalent
Ford part
name / number
Meritor Petroleum oil:
Heavy Duty
Engine Oil
MIL-L-2104E or
API-SL or API-CF
(previous API
designations
acceptable)SAE 50:
Above 10°F
(–12°C)—
SAE 40:
Above 10°F
(–12°C)—
SAE 30:
Below 10°F
(–12°C)Motorcraft SAE
30 Super Duty
Motor Oil /
XO-30-QSD
Mineral gear oil
with rust and
oxidation
inhibitor
API-GL-1Do not
use
multi-weight
and GL-5 EP
gear oils; they
may cause
transmission
failure or
damage.SAE 90:
Above 10°F
(–12°C)—
SAE 80:
Below 10°F
(–12°C)—
Synthetic oil:
MIL-L-2104E or
MIL-L-46152DDo
not use
multi-weight
and GL-5 EP
gear oils; they
may cause
transmission
failure or
damage.SAE 50:
All temperatures—
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ComponentLubrication
typeViscosity /
Ambient
temperature /
NotesEquivalent
Ford part
name / number
Allison Refer to transmission operator’s manual
Eaton UltraShift Refer to transmission driver instructions manual
Rear axle
Eaton-Spicer -
two-speed axleRHEOLUBE 362
(or equivalent)
(Eaton part
number 113741)——
Eaton -
single-speed axleGeneric lubricant SAE 75W:
–40°F to –15°F
(–40°C to –26°C)Motorcraft SAE
75W-140
Motorcraft
Synthetic Rear
Axle Lubricant /
XY–75W140–QL SAE 75W-80:
–40°F to 80°F
(–40°C to 27°C)
SAE 75W-140:
–40°F to 100°F
(–40°C to 38°C)
SAE 80W-90:
–15°F to 100°F
(–26°C to 38°C)Motorcraft SAE
80W-90
Premium Rear
Axle Lubricant /
XY-80W90-QL
SAE 75W-140:
–40°F and above
(–40°C and
above)Motorcraft SAE
75W-140
Motorcraft
Synthetic Rear
Axle Lubricant /
XY–75W140–QL SAE 80W-140:
–15°F and above
(–26°C and
above)
SAE 85W-140:
10°F and above
(–12°C and
above)
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ComponentLubrication
typeViscosity /
Ambient
temperature /
NotesEquivalent
Ford part
name / number
Cab components
Hydraulic lift pump
fluidDexron III — Motorcraft
MERCON
Multi-Purpose
(ATF)
Transmission
Fluid /
XT-2-QDX
Cab latch and lock
leversMobile SHC 32
Low Temperature
Lubricant (or
equivalent)——
Cab latch pivots;
Door check,
hinges, latches and
strikers; Seat
adjuster slidesGC/LB NLGI #2
lithium
complex-based
moly grease (or
equivalent) or
multi-purpose
lithium complex
grease— Motorcraft
Premium Long
Life Grease /
XG-1-C
Cab latch pivot
pinsLight engine oil — Motorcraft SAE
5W-30 Super
Premium Motor
Oil /
XO-5W30-QSP
Door lock cylinders Lock oil — Motorcraft
Penetrating and
Lock Lubricant /
XL-1
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