I don't know of any on-line instructions, but fieldstripping the Pony should be very easy.
- Drop the mag, and clear the chamber. i.e. unload the beast.
- Pull the slide back until the notch in the slide lock aligns with the notch in the frame, and push the slide lock out to the left.
- Ease the slide off forward, controlling the spring tension.
- Remove the spring, rod, and barrel from the bottom of the slide.