In
replacing the kingpin the operations are just the reverse of the above removal operations,
except that you should always use new kingpin bearing plugs and new
lock washers, and clinch over all cotter pins securely.
The kingpin bearing plugs on all
trucks except at the top of the kingpins on C.O.E, models, have no "expansion" feature, and must be staked in
place by peening or staking over the ends of the steering knuckle to hold the plugs securely in
place.
Drive in
the kingpin with a soft head hammer. After the kingpin is installed with the
thrust bearing assembled
at the bottom of the kingpin with the dust shield side at the top, check the
clearance between the steering
knuckle and axle "I" beam, Fig. 44. If this clearance is more than
.006" install a steel shim between the steering knuckle and the "I" beam at the top of the
kingpin.
In
installing this shim, start the kingpin in at the top of the knuckle and place the shim
over the kingpin. Mount the knuckle over the end of the "I" beam and drive the kingpin part way
through the "I" beam. Insert
bearing between the "I" beam and the knuckle and drive the kingpin into
position.
Due to the difference in design
between the Cab-Over-Engine and the conventional truck front axle, kingpin replacement is slightly different on
the C.O.E., and should be performed as follows after raising the
front end of the truck and removing the wheel and hub.
Remove the
turning radius stop bolt to provide wrench clearance. Remove the four brake
flange plate to steering
knuckle bolts and remove the flange plate
assembly.