Spicer Dana Spicer Steer Axles - Service Manaul - Manual (Page 21)

17
Alignment / Adjustment
Alignment / Adjustment
Toe Setting
1. Use a work bay with a level floor.
2. Drive the vehicle into bay slowly and straight ahead.
Try to roll to a stop without the use of brakes.
3. Chock the rear wheels.
4. Place a 5" (127 mm) long piece of masking tape par-
allel to the center tread rib on the rear of both tires,
half way up the tire height.
5. Position a trammel bar behind the front tires. The
pointers should be raised/lowered until they are at
the hub’s centerline height.
6. With the trammel bar pointers at the hub’s centerline
height, place the pointers at the outside edges of the
masking tape and secure the pointer set screws.
7. Mark the location of one of the pointers with a sim-
ple horizontal mark on the masking tape.
8. Remove the trammel bars from behind the wheels.
9. Roll the truck forward until the mark on the tape
travels 180-degrees.
10. Position the trammel bar at the front of the tires.
Position the pointer to the edge of the tape on the
side that has the horizontal mark. The pointer and
the mark should be at the same height.
11. Measure the toe between the pointer and the edge of
the tape on the opposite tire to get the total toe mea-
surement.
Note: Toe-in specification is 1/16" (1.587 mm) for unloaded
vehicles. This applies to a tract or (less trailer) or straight
truck with no load.
12. If the toe measurement is incorrect, loosen the tube
clamp and bolt on the end of each of the cross tubes.
Turn the cross tubes until the specified distance is
reached.
13. Make sure the threaded portion of the tie ends are
inserted completely and are visible in the complete
cross tube slot. Tighten the bolt and nut on the ends
of the cross tube to the specified torque.
14. Check the toe settings again.
Also Reference RP 642, Guidelines for Total Vehicle Alignment
published by the Truck Maintenance Council.
Front of vehicle
A
B
Toe-In
Distance at front of tire is less
than distance at rear of tire
B
A
Toe-Out
Distance at front of tire is greater
than distance at rear of tire