Colyn,
I have the diagram in paper copy and could fax it to you if
needed.
If you have a “built to plans” IV or IV-P, it’s
equipped with an electric solenoid that
mechanically locks the gear handle in the down position when the airspeed is
below a pre-set value—probably 90 kts or so—depending on your
builder. This is an electrical circuit, probably on a circuit breaker or fuse,
so check this first. It’s also possible to easily jam the mechanical part
of the solenoid by trying to raise the handle before the solenoid pin has been
electrically retracted. If the gear handle is forced at all, it bend or marks
the solenoid pin, preventing it from working smoothly afterward. The fix in
this case is probably to replace the solenoid. It’s located immediately
under the “drum” on the landing gear side of the center vertical instrument
console.
Hope this helps. Contact me off-line if you’d like to discuss further.
Bob