Well, as stated above... pics are needed to see what you see... but, youre in luck and I happen to know a lil bit bout steering (and not the 'steering' (cow) that Doug likes... hehe).
*Check the straightness of the bar/rod that comes down off the steering wheel... if its bent, steering is hindered.
*PB blast all the places that metal slides on metal, including the 'tierod ends'.
*Inspect to see if any 'binding' is occurring at ANY of the joints/pivots. All of the nuts/bolts should be cranked down tight... but there are times that the nut is just there to hold the bolt (ei.- kingpin). If said bolt is TOO tight a collapsing of the structure can occur and bind things up as it swings.
*Attempt to find the angle of Caster on the front end... the more caster, the more difficult it is to physically move the steering (in comparison to 0 caster).
*The arms for both the steering wheel bar arm and the king pin steering arm should be close to the same length... the shorter the steering wheel arm compared to the king pin, the harder it is to physically rotate.
... theres more... but till I/we see pics... itll be next to impossible to troubleshoot.
