I have mtd riding mower it won't change gears once I get it started going it won't come out first gear what can it be

SOURCE: Yard Machines - Won't shift into gear

The problem most likely is the shaft on which the interlock slides back and forth on inside the transmission. The yardmachines have a continous spinning shaft which ends in a bevel gear. The is an interlock plate which is connected to the Forward Reverse shift lever, this plate slides back and forth and either engages the forward gear or the backward gear. This shaft is most likely galled up, preventing everything from sliding the way it needs to. This is not a difficult thing to fix if you are somewhat mechanical. Disassemble the transmission and check if everything slides

SOURCE: how do I change the blades on a mtd yard-man 42" riding mower

u do not have to remove the deck. all u need is a floor jack and some air pressure because the bolts may be very tight u will needs either a 7/8 or 13/16 socket and they come off normal lefty loose righty tight. good luck

SOURCE: POULAN 42" 19HP RIDING LAWN MOWER

42 inch poulan belt broke on mower deck diagram to replace new belt

SOURCE: MTD riding mower does not move forward or reverse.

this is a belt driven transmission. from the engine driven pulley going aft towards the xmission differential there is another smaller variable speed pulley, there is a long belt between these two, from the variable speed pulley there is a larger xmission pulley that sits kitty-corner to it with a belt between these two. This larger "xmission pulley" is what drives the differential and depending upon which gear you have selected, makes it go forward or reverse. Check that both belts between pulleys are on, check that pulley's hardware is completely secured (nuts tightened down) The heads of these pulley's are splined to align to the shaft(s) and if they aren't tight, they will just spin and not engage the transmission. If your battery is under the seat, remove it and you should be able to see and access the aft pulleys. If both belts are on and engaging the pulley's and the shaft is turning on the transmission pulley than you have transmission differential failure. Bet it's the belt off or pulley head loose. Good luck, hope this helps

SOURCE: My mtd riding lawn mower won't go into gear...

Yes , this is what I had- the vari- pully was stuck and wouldn't move up or down and keep pressure on the belt. once I sprayed it with wd40 it started moving up and down ok- and would shift ok-