2015 FORD F750 Owners Manual

6. Install the dipstick making sure to seat it fully in the filler tube.
7. Remove the dipstick and inspect the fluid level. The fluid should be
in the designated area for normal operating temperature or ambient
temperature.
If you must add transmission fluid, see yourAllison Automatic
Transmission Operator’s Manualfor the correct fluid type.Use of a
non-approved automatic transmission fluid may cause internal
transmission component damage.
Fluid levels above the safe range may result in transmission failure. An
overfill condition of transmission fluid may cause shift or engagement
concerns or possible damage.
TorqShift® Automatic Transmission
See theScheduled Maintenancechapter for scheduled intervals for
fluid checks and changes. Your transmission does not consume fluid.
However, you should check the fluid level if the transmission is not
working properly. For example, if the transmission slips or shifts slowly
or if you notice some sign of fluid leakage.
Automatic transmission fluid expands when warmed. To obtain an
accurate fluid check, drive your vehicle until it is at normal operating
temperature, approximately 20 miles (30 kilometers). Verify that the
transmission fluid temperature gauge, located on the instrument cluster,
is within the normal range.
1. Drive your vehicle 20 miles (30 kilometers) or until it reaches normal
operating temperature.
2. Park your vehicle on a level surface and engage the parking brake.
3. With the engine running, parking brake engaged and your foot on the
brake pedal, move the gearshift lever through all of the gear ranges.
Allow sufficient time for each gear to engage.
4. Latch the gearshift lever in positionPand leave the engine running.
5. Remove the dipstick, wiping it clean with a clean, dry, lint-free rag.
6. Install the dipstick making sure to seat it fully in the filler tube.
7. Remove the dipstick and inspect the fluid level. The fluid should be
in the designated area for normal operating temperature or ambient
temperature.
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Low Fluid Level
Do not drive your vehicle if there is
no indication of fluid on the dipstick
and the ambient temperature is
above 50°F (10°C).
Correct Fluid Level
Check the fluid at normal operating
temperature, 196°F-216°F
(91°C-102°C), on a level surface.
The fluid reaches normal operating
temperature after approximately 20 miles (30 kilometers) of driving.
High Fluid Level
Fluid levels above the safe range
may result in transmission failure.
An overfill condition of transmission
fluid may cause shift or engagement
concerns and possible damage.
Overheating conditions can cause
high fluid levels.
Adjusting Automatic Transmission Fluid Levels
Note:Use of a non-approved automatic transmission fluid may cause
internal transmission component damage.
Before adding any fluid, make sure the correct type is used. The dipstick
handle normally indicates which type of fluid to use. You can also find
the fluid specification in theCapacities and Specificationschapter.
If necessary, add fluid in 0.5 pint (250 milliliters) increments through the
filler tube until the level is correct.
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If an overfill occurs, excess fluid
should be removed by a qualified
technician.
Note:An overfill condition of transmission fluid may cause shift or
engagement concerns or possible damage.
Do not use supplemental transmission fluid additives, treatments or
cleaning agents. The use of these materials may affect transmission
operation and result in damage to internal transmission components.
Manual Transmissions
Note:Use of a non-approved transmission fluid may cause internal
transmission component damage.
See theScheduled Maintenancechapter for scheduled intervals for
fluid checks and changes.
Your manual transmission may have an optional synthetic fluid that
allows the use of extended service intervals. A tag on the filler plug
identifies the use of the synthetic fluid.
Only use fluid that meets manufacturer specifications. SeeTechnical
specificationsin theCapacities and Specificationschapter.
Checking Fluid Level
1. Park your vehicle on level ground.
2. Set the parking brake, shift into first gear and turn the engine off.
3. Clean any dirt from around the filler plug.
4. Remove the filler plug and inspect the fluid level. The fluid level
should be at the bottom of the filler plug opening.
5. Add fluid, if necessary, through the filler plug opening.
6. Clean and install the filler plug securely.
Changing Fluid
Drain and refill your transmission fluid while it is warm.
1. Park your vehicle on level ground.
2. Set the parking brake, shift into first gear and turn the engine off.
3. Clean any dirt from around the filler and drain plugs.
4. Remove the filler plug and drain plug, and then drain the fluid into a
suitable container. Dispose of all used automotive fluids in a
responsible manner following your local authorized standards.
5. Clean and install the drain plug securely.
6. Add fluid through the filler plug opening.
7. Clean and install the filler plug securely.
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DRIVESHAFT
Check the universal joints for any evidence of wear or looseness at the
regular lubrication interval. Stop your vehicle immediately, should
driveshaft vibrations occur, to avoid possible hazardous consequences or
damage to other components.
REAR AXLE FLUID
Your rear axle may have an optional synthetic lubricant that allows the
use of extended service intervals. A tag on the filler plug identifies the
use of the synthetic lubricant.
Only use a lubricant that meets manufacturer specifications. See the
Capacities and Specificationschapter.Use of a non-approved rear
axle lubricant may cause internal axle component damage.
Checking the Fluid Level
See theScheduled Maintenancechapter for lubricant check intervals.
1. Park your vehicle on level ground.
2. Set the parking brake and shift into positionNorP(automatic
transmission), or first gear (manual transmission). Turn the engine
off.
3. Clean any dirt from around the axle filler plug.
4. Remove the filler plug and inspect the lubricant level. It should be at
the bottom of the filler plug opening.
5. Add lubricant, if necessary, through the filler plug opening.
6. Clean and install the filler plug securely.
Changing the Fluid
See theScheduled Maintenancechapter for lubricant change intervals.
1. Drain the rear axle while the lubricant is warm.
2. Park your vehicle on level ground.
3. Set the parking brake and shift into positionNorP(automatic
transmission), or first gear (manual transmission). Turn the engine
off.
4. Clean any dirt from around the rear axle filler and drain plugs.
5. Remove the filler and drain plugs. 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 lubricant through the filler plug opening.
8. Clean and install the filler plug securely.
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SPRING U-BOLT CHECKS
Check U-bolt nuts and re-torque every 36000 miles (60000 kilometers)
after initial 1000-mile (1600 kilometer) re-torque. Clean and lubricate the
U-bolt and nut threads and seats to make sure they are in peak condition
when re-torqued.
U-bolt Nut Torque
Suspension ft-lb N•m
Front axle – 8500 lb (3856 kg) 180-200 244-271
Front axle – 10000 lb (4536 kg) and higher 260-300 353-407
Rear axle with multi-leaf 260-300 353-407
Rear axle with IROS air suspension 370-400 502-542
Rear axle with Hendrickson air suspension 400–450 542–610
See air suspension U-bolt re-torqueing and installation information below.
Air Suspension U-bolt Checks and Re-torqueing Procedures
1. Inspect the threads of the U-bolt and nut for rust and debris. Clean
the threads if contaminated.
2. Using a torque wrench, determine if you can turn any nuts with a
force below the specified torque.
3. Using the lowest discovered torqued nut as a starting point,
re-tighten the nuts using the sequence listed underAir suspension
U-bolt and U-bolt nut installation.
Air Suspension U-bolt and U-bolt Nut Installation
1. Inspect the threads of the U-bolt and nut for rust and debris. Clean
the threads if contaminated.
2. Install the U-bolts and nuts and torque the nuts to seat the cap flat
which is about 18 ft-lb (25 N•m) using a diagonal pattern. Use the
same diagonal pattern for each of the following U-bolt nut re-torque
steps.
3. Tighten U-bolt nuts in increments of 74 ft-lb (100 N•m) until
tightened to final torque for the particular suspension.
BRAKE FLUID CHECK
WARNING:Brake fluid is toxic. If brake fluid contacts the eyes,
flush eyes with running water for 15 minutes. Seek medical
attention if irritation persists. If taken internally, drink water and induce
vomiting. Seek medical attention immediately.
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WARNING:If you use a brake fluid that is not DOT 3, you will
cause permanent damage to your brakes.
WARNING:Do not let the reservoir for the master cylinder run
dry. This may cause the brakes to fail.
Check and refill the Full Power brake fluid reservoir using the following
procedure. See theScheduled Maintenancechapter for the service
interval.
1. Clean the reservoir caps before removal to prevent dirt or water from
entering the reservoir.
2. Visually inspect the fluid level. It should be at the bottom of the fill
ports.
3. Add brake fluid, if necessary, from a clean, unopened container until
the level reaches the bottom of the fill ports. Do not fill above this
line.
Only use a DOT 3 brake fluid certified to meet manufacturer
specifications. See theCapacities and Specificationschapter.
CLUTCH FLUID AND LINKAGE
Clutch Fluid
WARNING:Carefully read cautionary information on product
label. For MEDICAL EMERGENCY INFORMATION, contact a
physician or Poison Control Center immediately; on Ford-Motorcraft®
products call: 1-800-959-3673 (FORD). Failure to follow these
instructions may result in personal injury.
Use only a DOT 3 brake fluid designed to meet manufacturer
specifications. See theCapacities and Specificationschapter.
During normal operation, the fluid level in the clutch reservoir should
remain constant. If the fluid level drops, fill to the step in the reservoir.
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1. Set the parking brake, shift into
first gear and turn the engine
off.
2. Open the hood.
3. Clean the reservoir cap before
removal to prevent dirt and
water from entering the
reservoir.
4. Remove cap and rubber
diaphragm from reservoir.
5. Add fluid, if necessary, until it
reaches the step in the reservoir.
6. Reinstall rubber diaphragm and cap onto reservoir.
See theScheduled Maintenancechapter for service intervals.
Clutch Linkage
Lubricate the clutch linkage using the following procedure. Use a grease
that meets manufacturer specifications. See theCapacities and
Specificationschapter.
Transmission and clutch removed for clarity.
1. Set the parking brake, shift into
first gear and turn the engine
off.
2. Remove the inspection cover
from the clutch housing.
3. Lubricate the clutch release
bearing (one location) and the
clutch release shaft (two
locations) grease fittings with a
grease gun.
4. Lubricate the clutch release
wear pads (two locations) where
they contact the clutch release
bearing with a brush or similar
tool.
5. Reinstall the inspection cover.
See theScheduled Maintenancechapter for service intervals.
POWER STEERING FLUID CHECK
Note:To avoid damage to the power steering system, do not operate
your vehicle with a low power steering fluid level.
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Note:If adding fluid is necessary, use only the appropriate fluid. See the
Capacities and Specificationschapter. A low fluid level may indicate a
leak in the power steering system. Inspect the power steering system
and repair the leak or see an authorized dealer or a qualified technician
for service. See theScheduled Maintenancechapter for the
recommended service intervals.
Check the fluid level when it is at ambient temperature, 20°F–80°F
(-7°C–25°C):
1. Set the parking brake, and then start the engine.
2. Shift into positionNorP(if equipped) (automatic transmission) or
first gear (manual transmission) and turn the engine off.
3. Open the hood.
4. Clean the top of the power steering fluid reservoir.
5. Remove the dipstick from the reservoir and wipe the dipstick clean.
6. Reinstall the dipstick. Remove it again and check the fluid level.
Check the MAX. COLD side of the
dipstick if the fluid is cool or warm
to the touch (approximately
68°F-120°F [20°C-49°C]). The fluid
level should be within the FULL
range. If necessary, add fluid in
small amounts, continuously
checking the level, until it reaches
the proper level.
Check the MAX. HOT side of the
dipstick if the fluid is too hot to
touch (approximately 176°F–230°F
[80°C-110°C]). The fluid level
should be within the FULL range. If
necessary, add fluid in small
amounts, continuously checking the
level, until it reaches the proper
level.
When you install the dipstick, make sure to seat it and tighten it
securely.
You can also check the fluid level by looking at the see-through plastic
reservoir. Make sure that the fluid is within the minimum and maximum
fluid range as marked on the reservoir.
ADD MAX. COLD
FULL
ADD MAX. HOT
FULL
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