Does anyone know if it is possible to convert the tranny mounted hydraulic pump(for power-volume) to the controls that are factory mounted on the steering column of the 406's bypassing the engine pump and resivoir? In other words I want to use the cab controls to run the quick attach fitttings front and rear with the gear driven pump.
Thanks,
MUD
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Life should NOT be a journey to the grave with the intention of arriving safely in an attractive and well preserved body, but rather to skid in sideways - Beer in one hand - Blonde in the other - body thoroughly used up, totally worn out and screaming Wooooo Hooooo what a ride".
I don't know much about the system on your truck, but I don't think the hand valves would be big enough to handle the flow on the pump. If you look at the line sizes for the 2 system you will probably find they are very different in size. How are the high flow lines controlled now? Could you rig up a set of remote cables (available at hydraulic shops) to run the valves from the cab (through the back wall....) Just a thought.
I installed factory front hydraulics on my 416, and had my local fitting hydraulic company check everything out. Those valves would not handle a much higher volume pump. There were some different pumps with varying ratings available for that valve body, but the lower pump is way too big. I'd get your local hydro shop to build a manifold for the lower pump, and use solenoid or cable operated valves from the cab. A related issue: can you drive the 406 and have the lower PTO pump engaged at the same time?
. A related issue: can you drive the 406 and have the lower PTO pump engaged at the same time?
Well I don't know. I was under the assumption that this lower pump was used to control various attachments like boom mowers so I just thought the mog would be moving while it was engaged. Somebody smart feel free to drop in anytime!!!!!!!! I can fab this stuff but sometimes I only think in the moment.
I have thought about hooking into the flow line directly and running 2 MORE LEVERS to the cab, but oh my it's confusing enough sometimes with the amount of beer that gets consumed! It probably will be my only option I just wanted to know if anyone had done it before.
Thanks,
MUD
From the Case manual: "IMPORTANT: Always disengage the hydraulic pump before driving the Unimog or before operating the engine above 2175 RPM. Damage to the pump could result."
Goes on to say: "When operating the stopped machine with the high capacity hydraulic pump engaged, refer to the following information to provide adequate lubrication for the transmission. Standard 8 x 4 Transmission - shift the high/low range lever to Low and the main shifting lever to 2nd gear. Shift the forward/reverse lever to neutral. Optional 20 x 8 Transmission - shift the cascade group selection lever to Off, shift the main shifting lever to 2nd gear and shift the forward/reverse lever to neutral."
Assume the same would apply for non-Case pumps as the Trannys should be the same.
Well I don't know. I was under the assumption that this lower pump was used to control various attachments like boom mowers so I just thought the mog would be moving while it was engaged. Somebody smart feel free to drop in anytime!!!!!!!! I can fab this stuff but sometimes I only think in the moment.
I have thought about hooking into the flow line directly and running 2 MORE LEVERS to the cab, but oh my it's confusing enough sometimes with the amount of beer that gets consumed! It probably will be my only option I just wanted to know if anyone had done it before.
Thanks,
MUD
I have a high speed PTO (3000RPM) that fits on the side of the cascade box that you can run the pump off of and still drive the mog. Let me know if you are interested in it.
I'll crawl under the old girl tonight and take some pictures and try and get a number off the pump. The previous owner was the "New Jersey transit authority" and they used it with something similar to a Mulag mower for the other side of guardrails and steep banks. So my thought is they had to be moving with the pump engaged. I guess I'll find out, it'll either work now or after throwing more money at it. When I get the numbers and pics maybe someone can help in the cross reference part.
Thanks,
MUD
The hi-cap hydraulic pump is higher volume, but at lower engine RPM, than the front system (which does run all the time). That's why the engine speed is limited for the Hi-cap system. No problem driving with the hydraulic system(s) running as long as the engine speed (and limit of hi-cap pump) is not exceeded. If there's a chance of the engine speed pushing the pump too hard, I'd think a pressure dump valve, set just above what your normal operating pressure is, would protect the system for short speed infractions.
For controlling the rear hi-cap system from the steering column control valves, it is common to have a second hydraulic system controlled remotely, by hydraulics. It's just a matter of getting spools which respond to hydraulic input instead of manual handles. For example, a 'lift' command on the column would send pressure to a valve/spool in the other system, opening it to make it do it's action. I know zip about details but any hydraulic supply company should be able to engineer a system like that.
Here's a reference to a pilot valve made to do just as I described. Note the pilot input requirement of 60 psi minimum, certainly obtainable from the front hydraulic system!! Sure would want to verify that 2000 psi plus would not hurt it (or use a dump/bypass value to limit to whatever the pilot input will handle).
I have a high speed PTO (3000RPM) that fits on the side of the cascade box that you can run the pump off of and still drive the mog. Let me know if you are interested in it.
Well Von you're going to love this. I really don't know were my pump is mounted right now except that it is there and mounted on the tranny somewhere. It could be mounted to the cascade portion of the tranny. When I take the pictures and get the number off it maybe you can I.D. it.
Thanks,
MUD
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