Is it an extrashift model ? If it is, I'd sell it ASAP ! We had one, it was the biggest pile of ***** I've ever owned. Apart from lot's of different niggly problems, the clutch was very sharp and no end of calibration could sort it out. It was highly dangerous, especially when hitching on impliments etc. If you wanted to go back an inch it would jump back a yard. On steep ground the brakes would vanish after about 5 mins unless you changed direction regularly. This problem was sorted with a mod in the end, though McCormick wouldn't admit there was a problem for a while, even though we knew others who had the same trouble and had the mod fitted.
West is Best !