Sprayer strut suspension

1. A chassis suspension comprising:

an axle having a substantially upright journal adapted for upright axial constraint of an inner journal therein;

an inner journal extending into the upright journal, the inner journal having a lower end, wherein the inner journal is adapted to constrain axial movement of a strut rod therein;

a strut rod extending into the inner journal and having a lower strut rod portion adapted for mounting a ground-engaging drive mechanism and wheel, wherein the lower strut rod portion has an upper end;

a spring constrained between the lower end of the inner journal and the upper end of the lower strut rod portion; and,

wherein the axle is an adjustable wheel track axle.

2. The suspension of claim 1 , wherein the upright journal is further adapted for rotational movement of the inner journal therein.

3. The suspension of claim 1 , wherein the inner journal is further adapted for rotational movement of the strut rod therein.

4. The suspension of claim 1 , wherein the upright journal is further adapted for rotational movement of the inner journal therein.

5. The suspension of claim 1 , wherein the spring comprises an airbag.

6. The suspension of claim 5 , wherein the airbag contains pressurized air.

7. The suspension of claim 6 wherein the air pressure is adjustable.

8. The suspension of claim 1 , wherein the drive mechanism is a hydraulic drive motor.

9. The suspension of claim 3 , wherein relative rotational positioning of the inner journal and the strut rod is fixed by means of a scissors joint.

10. The suspension of claim 1 further comprising steering means.

11. The suspension of claim 10 wherein the steering means comprise at least one hydraulic piston.

12. A sprayer comprising at least one chassis suspension of claim 1 .

13. The sprayer of claim 12 wherein the sprayer is a high clearance vehicle.