Hey i got a 99 42m putz 16c it wont stroke off the remote or off the back panel i replaced the boost pump in front of the main hydraulic pump it will kinda creep abit but barely moves.Any other ideas? i was told it could be the 900 valve but havent tried that yet is there even a way to check to see if it is that?The light on back panel is also lighting up when trying to stroke

Does it work in manual? 

like you mean by trying to stroke off back panel?no it doesnt

Will it stroke manually off the hydraulic block?

no i havent is that where you hook up  wires on the block to switch it manually with toggle switches ive never had to do that so im not a 100 percent sure

Read operation manual on how to work it in manual. My wild guess would be the relay. I call it a centipede plug. 1/2 inch high 1/2 inch wide inch or more long. Has 8 or ten post on it.If it's loose or bad it won't stroke

does the pistons move but the s tube doesn't shift ? if so check hopper safety switch , that little centipede relay , proximity switches , there is some manual buttons you can push on the control block that shifts it manually,

You posted same problem in 9/2012 TravelTec gave you a photo of the manual valves.Doesn't get any better than that. Look at your reply's