83
Adjustment of the front wheel toe-in.
For checking the toe
-
in of the front
wheels, see that the tires have been inflated to the rated pressure and measure
difference in distance B
1
and B (Fig. 65) across the wheel rims.
Fig.65. Positions of Steerable Wheels
For checking proceed as follows:
- place the truck on an even hard
-
paved horizontal site, so that the front
wheels are positioned for the straightforward travel of the truck;
- using a measuring rule, check distance B
1
between the wheel rim beads in
the rear section at the level of wheel centers and mark these points. Roll the
truck, so that these marks are in front and check distance B. In front the distance
must be 1-3 mm less than that in the rear. If the difference of the distances
measured between B
1
and B is beyond the limits, readjust by changing the
length of the lateral steering rod after slackening the bolts on the steering rod
ends. Upon readjusting the toe
-
in, tighten the rod end bolts. Angles of turn
are limited by constant non-adjustable thrusts. The amount of these angles is
given in Fig. 65.
BRAKE SYSTEMS
The truck is equipped with separate brake systems – service, stand
-
by,
parking and auxiliary ones.
Service brake system
The service brake system should ensure speed reduction and the truck stop-
ping irrespective of its speed, load and road slopes, which it is designed to.
The drive of the brake gears is of combined type (pneumohydraulic), two
-
circuit, with separate braking of the front axle wheels and those of the two rear ax-
les.
The brakes are controlled by the pedal in the driver’s cab, connected with the
double
-
unit valve by levers and tie rods.
The service brake gear is of drum type with inner shoes 5 (Fig. 66), which are
interchangeable for all the wheels. Each brake gear has two hydraulic cylinders 1
installed into the same housing. The brake shoes are mounted on the anchor pins 7.