Terex square shooter 8042: forks dont tilt up very much. To that regard, if one raises the boom a notable amount, then the forks (carriage) will tilt a little more, and if it is lowered they will remain tilted up. The helpers are always signalling to tip up the bucket during chores using the clean up bucket. Grabbing a load of gravel and not have it spill is also a bit of a challenge since the tilting up would be helpful to prevent spills. Needless to say, we sort of accept this but only cause we cant figure what to do. Keep in mind this "problem/condition" occurs if the forks are empty or not. We called for a concrete pump, easy job on a loading dock, but they dont want to run the 3" hose - they want to do 2-1/2" hose and lessen the big aggregate to the minimum and I dont feel it is correct to use small gravel concrete on a loading dock, rebar or not. So we (more correctly, my helper) came up with these "crib shoes" to shim the forks' heel a short ways off of the carriage. Rube-ish, but will get us through this small concrete placement. The 6x6 is held onto the fork with a sandwich of plywood. A 4x4 would work were it not for the area leading to the loading dock is sloped slightly toward the dock. Plan is to have concrete truck fill the bucket almost full (20 cf or about 3/4 yard) which is about 3000#, raise the bucket and place the concrete on the dock. Dock width is 12', well w/i the capacity of this machine. I thought this might change the force on the fork but don't see it causing any issues other than saving is from shoveling since the concrete truck's chute is essentially useless on a loading dock, the concrete just sits in the chute and one has to move it w a chute hoe. Then shovel. Not fun 4 sure.
Bob do you have a Garbro bucket? I have two and don't pour concrete that often, have them for pouring multiple inverts and misc storm structures. If you can't get one with for pockets on the bottom they could be fab'd up easily. One could save some money on the dock pours you do. I have a 1/2 or 3/4 yard Garbro I bought at auction that I would get rid of but shipping would be outrageous.
No Garbro bucket but this cleanup bucket was able to get the concrete onto the dock.....we had to watch the top of the boom to the dock awning but this was reviewed during the dry run test of 'the invention (those 6x shim blocks). These Terex Square Shooter 8042 forklifts have no slave ram to follow the boom and position the forks, instead they must have some form of valving that directs some flow to the carriage ram while boom rams are being elevated. And the converse when lowering. Even when the forks have no load (empty) the limitation to the fork tilt point upward movement has always been a curiosity especially when it is observed that if the boom is raised up to about 45 degrees and then the forks are tilted back they will smoothly roll back, ergo said relationship of the carriage to the boom will allow a higher tip back angle and when the boom is lowered it thusly will remain in the tip back angle. That series of movements demonstrates the fork tilt ram is capable of moving an additional amount at certain times. I believe the valve that divides the flow and keeps the forks automatically level when raising or lowering is called a counterbalance valve. If the forks would not move much regardless of where the boom is, I would think something is awry like a relief or a frozen pin.... more on this to follow once I take a look at the schematic. On the schematic there is a valve called a 'tilt limiter' which is married to a 'counterbalance cartridge'. Hmmm. I have read where folks cant lift a load and the circuit relief valve is found out of whack but here is a situation where there is no load and the fork tilt back capability is minimal.
If it would be helpful, I can supply a hydraulic schematic.
When operating the tilt, the carriage ram does appear to go all the way in, but then settles outward about 3/8". The amount of fork tilt available on this machine just isn't that much to manage something like this cleanup bucket being rolled back. The better solution to assure adequate tilt for this attachment is to simply shim the forks as per previous post, which is a quick straightforward simple task. Or: get a Garbro bucket which wont involve tilting the carriage back (thank you CM1995). As to why the ram settles outward, that remains an interesting question because (1) once the initial settling occurs, it will hold the position. And (2) this outward movement is only observed at the very end of the stroke. Reminds me of an explanation I once heard: PFM P ure F oolish M agic
Does this have a self leveling function. As the boom goes up the forks tilt down
Yes, if for example the forks are level and the boom raised; the forks remain automatically parallel to the ground. The angle tween the boom and the forks is continually revised as the boom is elevated.