Systems, devices, and/or methods for driving posts

1. A system comprising:

a frame, the frame comprising an outer mast and an inner mast, wherein the outer mast slides along the inner mast;

a motor coupled to the frame;

a hydraulic system coupled to the motor;

a jackhammer head coupled to the outer mast, which outer mast allows the jackhammer head to float up and down on the inner mast, thereby vibrations from jackhammer motion substantially do not transfer from the jackhammer head to the frame;

a drive cap coupled to, and driven by, the jackhammer head, wherein:

responsive to a valve actuation, the hydraulic system causes the drive cap to drive a post into the earth via a repeatedly reciprocating motion of the jackhammer head;

the repeatedly reciprocating motion causes the drive cap to impact the post at a frequency of impact separated by less than one tenth of a second;

wherein:

the system is capable of driving a post having a length that is in excess of eight feet; and

the drive cap has a stroke of over eighty inches.

2. The system of claim 1 , wherein:

the drive cap is tapered such that the post is guided into the earth by the drive cap.

3. The system of claim 1 , further comprising:

a hydraulic cylinder that cushions impacts caused by reciprocating motion of the jackhammer head.

4. The system of claim 1 , further comprising:

a releasably coupleable auger constructed to be operated via the hydraulic system, the auger constructed to drill a hole in which the post is placed, wherein, when the auger is operatively coupled to the system, the hydraulic system causes the auger to rotate and thereby drill the hole.

5. The system of claim 1 , further comprising:

a set of wheels, wherein, responsive to a user action, the hydraulic system is coupled to a drive that causes motion of the system relative to the earth via rotation of the set of wheels.

6. The system of claim 1 , further comprising:

a set of mud tires, wherein, responsive to a user action, the hydraulic system is coupled to a drive that causes motion of the system relative to the earth via rotation of the set of mud tires.

7. The system of claim 1 , further comprising:

a set of manually operated hydraulic valves that cause said valve actuation.

8. The system of claim 1 , further comprising:

a square bracket adapter coupleable to the frame, wherein the square bracket adapter is constructed to couple square edged posts to the system.

9. The system of claim 1 , wherein:

the frame comprises an extendable member, wherein the hydraulic system causes the extendable member to move linearly relative to other portions of the frame to engage the post.

10. The system of claim 1 , wherein:

the post has a length of up to 14 feet in length.

11. The system of claim 1 , wherein:

the frame is coupled to a skid steer loader.

12. The system of claim 1 , wherein:

the frame is coupled to a tractor via a three point hitch.

13. A system comprising:

a frame, the frame comprising an outer mast and an inner mast, wherein the outer mast slides along the inner mast;

a motor coupled to the frame;

a hydraulic system coupled to the motor;

an actuator coupled to the outer mast, which outer mast is constructed to float up and down on the inner mast as the actuator rises and as the outer mast falls, thereby vibrations from outer mast motion substantially do not transfer to the frame;

a drive cap coupled to, and driven by, a weight of the outer mast, wherein, responsive to the outer mast falling, the drive cap drives a post into the earth via repeated reciprocating motion of the drive cap;

wherein:

the system has a front to back tilt in excess of 25 degrees; and

the system has a right to left tilt of in excess of 35 degrees.