F 250 4WD Super Duty V10-6.8L VIN S (2001)
(whichever comes first). Refer to the following Service Procedure for details.
SERVICE PROCEDURE
Verify stiff steering, wandering, or poor returnability after turns. Proceed as follows:
1.
Check alignment and correct if not to specification.
NOTE:
USE 0.75 DEGREE OR LESS CASTER SLUGS TO CHANGE THE CROSS-CASTER. IF THE CASTER REQUIRES MORE THAN A 0.75
DEGREE CHANGE YOU MUST USE CASTER WEDGES THAT ARE INSERTED BETWEEN THE AXLE AND LEAF SPRINGS. USE
IDENTICAL CASTER WEDGES ON BOTH SIDES TO CHANGE CASTER.
a.
If alignment corrects the condition, return vehicle to customer.
b.
If alignment does not resolve condition, continue to Step 2 (steering knuckle torque to turn test).
2.
Perform the following steering knuckle torque to turn test:
a.
Place vehicle on alignment rack with front wheels on low friction plates. Wheels must be pointing straight forward.
b.
Remove tie rod from steering knuckle. Install a nut and bolt into the steering arm hole and tighten.
NOTE:
WHEELS MUST BE LOADED AND ON PROPERLY OPERATING TURN PLATES TO PROPERLY CHECK TURNING TORQUE.
c.
Use a click-style torque wrench and position it on the bolt head so that the handle is pointing toward the front of the vehicle.
d.Set the wrench at 135 Nm (100 lb-ft).
e.
Pull on the torque wrench so that you are turning the front wheel outboard.
(1)
If the knuckles turn without the wrench clicking, then ball joint turning torque is acceptable. Return vehicle to customer.
(2)
If the wrench clicks before the wheel breaks free and begins to turn, then the torque to turn the knuckle is too high. Continue by
replacing ball joints (Step 3).
f.
Perform this procedure on both front wheels.
3.
If the torque wrench clicks before the wheel breaks free and begins to turn, then replace the lower ball joint with the greaseable Lower Ball Joint
(1C3Z-3050-AB) and replace the upper with the current replacement part (F6TZ-3049-AA). Refer to the appropriate model/year Workshop
Manual for removal and installation procedures.
Follow this procedure to torque the ball joints after knuckle installation.
a.
Torque lower ball socket nut to 47 Nm (35 lb-ft).
b.
Torque upper ball socket nut to 95 Nm (70 lb-ft), then advance nut to the next slot to line up with hole and install cotter pin.
c.
Retorque lower ball socket nut to 190/217 Nm (140/160 lb-ft).
NOTE:
THE NEW GREASEABLE LOWER BALL JOINT MUST BE LUBRICATED AFTER INSTALLATION.
SERVICE SCHEDULE FOR GREASEABLE LOWER BALL JOINT
If a greaseable lower ball joint is installed, it must be serviced per the below schedule:
^
At every oil change or at 8000 kilometer (5000 mile) intervals (whichever comes first)
The recommended lubricants are:
^
Premium Long Life Grease (XG-1-C, or equivalent meeting Ford Specification ESA-M1C75-B)
^
Hi-Temp Wheel Bearing Grease (E8TZ-19590-A, or equivalent meeting Ford Specification ESA-M1C198-A)
