I just purchased a 453 with 800 hrs. The machine sat for 3 months. It runs sweet but ars go up and down slow and shimmy a little I was told air may have damaged both pumps and got a estimate of 7800 to repair, I almost fell over! Somebody said it is the gear pump I found one for 385.00 and have a shop that can put it in. The machine drives and turns fine. Please give me some advise.
