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Does the M817 bed have the built in pump that is run by a PTO? If so, why not attach a 24V motor (like a starter) to the pump shaft in order to operate the bed?

btw- what is the hydraulic set up for a M929? I heard the hydraulics for a M925 (or any other M939's with winch) is too low pressure to operate the hoist on the M929 so curious about the system. And really curious then how the M930 (dump w/winch) is set up on the hydraulics. I know the...

I think part of problem is the M929 is on the short frame wheelbase (same as M931) and there's not enough room to have a decent size bed and room for a spare. If the extra foot of M923 wheelbase was incorporated, the load would shift forward

Help me understand a bit more of the extra length statement. Are you referring to the length of the frame that extends past the rear axle? I know the wheelbase for a M929 or M931 is the short version at 13' 11" and the wheel base for the M923/M925 is a foot longer at 14' 11" but I'm guessing...

I agree that drop sides are a good feature to keep. Luckily, my M923 with troop bed and drop sides is in pretty good shape. My M925...well, it's not so much in good shape. It was used as Volunteer Fire Department water truck and i think either they used some type of fire retardent or had a...

Ahh- your truck has ABS and ASB. Anti -lock Brake System and Anti-Squash Bar I like it

I'm referring to the added steel I circled in red in this pic. I'm assuming the item circled in green is a guide for the bed to sit square but I don't know what's circled in red.

That's a really nice setup and your shop does quality work. I see the box guides sticking up from the frame but did you also beef up the frame? I can't make out what was added to the frame in the lower right part of the pick...just to the right of the box guide.

Very cool. I'll probably do my own mainly because I don't know of a shop around me that could do the conversion to my spec. But doing it myself also means it might be a while... tobyS: I can get easily get take-off 14ft and 16ft dump beds so agree I have to be careful. Not a bad thing when...

Nice truck. Is that an electrically driven pump or did you tap off the transmission PTO or engine fan belts? PSI of system? What size reservoir needed for that multistage cylinder? I know, lots of questions, but that is pretty much the exact setup I'd want.

I hear ya, Fasttruck, and agree with your concerns as there are idiots out there that don't comprehend limitations of their equipment. Worse yet, are the clueless ones in the average size car or small SUV who will speed up and zip in front of a fully loaded truck plodding safely along in the...

Thanks, Wes, for pointing it out it the TM. It was so obvious, I forgot it was there and just remembered folks discussing it. Looks like adding a commercial bed to a M939 series can add significant capacity over a M929/M930 and in a safe manner which matters a lot to me.

I saw the tables that show the weight per yard of various materials but it doesn't help me understand the true limitations of the M929. I agree with Wes's point of adding a commercial dump bed to a M939 series is a great solution. I have a M925 project truck that would make a great project...

Is the yardage limited by the dimensions of the bed or by the hoist? The truck itself should hold a lot more weight wise than just 5-6 yards when not on rough terrain.

I’m assuming quarry mode is named because of the raw unscreened rock and dirt fresh from the ground? And the purpose of quarry mode means a mixture of large and small things or sticky things like snow can flow over the over instead of jamming up trying to go below the top hinge?

Ahhh, it's easier to see in the 800 series manual. The 939 series doesn't make sense to me as it refers to using the wings so I don't understand how it meters the dump. I uploaded the spreading section from each manual here.

The dump bed on the M929/930 is shaped differently than civilian dump trucks and has an odd gate arrangement. I'm interested in getting one to move build roads on my place, haul brush/trees to the burn pit, etc. but not sure how well it's suited for those tasks. The civilian dump trucks are...