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post #1 of (permalink) Old 07-22-2009, 03:19 AM Thread Starter
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Winch control question

I just got a second hand but unused 9000 lb Mile Marker hydraulic winch. I plan to set it up with it's own hydraulic pump (modified power steering pump) the pump should put out about 7 GPM at 2000 RPM's. This is more then Mile Marker rates the winch for but from what I have found on the internet they rate them at a lower flow because that is all regular power steering pumps provided and they work fine with more flow.

My question is this, I have 2 options for the control valve.

1. Use the standard electric solenoid valve. The advantage of this is that it allows the use of a remote on a cord. The disadvantage is that it is either on or off with no ability to throttle the speed, to slowly move things. If I go with this option I will install a secondary control in the cab.

2. Use a manual spool valve. The advantage is that I can throttle the valve to slowly move the winch. The disadvantage is that I will not have a remote. If I go this route I will install a cable control to operate the valve from the cab.

I have never operated a power winch on a Jeep before, how valuable is the wire operated remote? Would you trade a remote for the ability to throttle winch speed?

Wilhelm

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Last edited by bandhmo2; 07-22-2009 at 04:44 AM.
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post #2 of (permalink) Old 07-22-2009, 05:35 AM
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You could get really fancy with the controls and have everything, but I wouldn't recommend it.

My winch is controlled from inside the Jeep. It's rather cumbersome for some jobs, where it sure would be nice to have on/off on a lanyard outside. Having to go inside the Jeep to change the speed wouldn't be much of a handicap. So would I trade a remote for the ability to throttle winch speed? Absolutely.

EVERYTHING's easy for the guy who doesn't have to do it.
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post #3 of (permalink) Old 07-22-2009, 06:35 AM
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Don't interpret this as a knock on Mile Marker winches. The ones I've seen in use were very slow. Strong but slow. I can't think of times where I would have needed one to run more slowly than it already was running. I'd try it first and see if you need the option to throttle it down. Just my $.02 worth.
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post #4 of (permalink) Old 07-22-2009, 09:29 AM
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The only one I've seen in action had two speeds. Fast was reasonable, and slow was, well, slow. It shifted automatically between the speeds depending on load. Upalittle has a good point. Even the fast speed was slow compared to most electrics no-load speed.

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post #5 of (permalink) Old 07-22-2009, 05:25 PM Thread Starter
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The thought to use both valves went through my mind but the nightmare it would be to plumb and the space it would take up make it out of the question. If I use the manual valve I would mount it on the winch so it could be used from the outside. I would then add a cable control from the handle into the cap, kind of like the controls on both sides of a tow truck, with one being the actual valve and the other linked to the handle.

Yes they are slow. Mile Marker rates the line speeds at 3.5 GPM. However, my calculates (which need to be confirmed with testing) show that the flow bypass in a stock power steering pump opens at 2.7 GPM, so in use the winch will only produce about 75% of rated line speed. I plan to run a separate pump with the flow bypass modified. This should allow 7 GPM at 2000 RPM so I should get about double the rated line speeds. I expect to get about 12 FPM line speed with the winch in low, and 70 FPM in high. Warn rates there 8274-50 at 73 FPM unloaded, and 6 FPM at full load. So I hope to have about the same speeds as an 8274 but with the advantage of 100% duty cycle.

Wilhelm

I will start using Metric only when the duodecimal system is adopted!!
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post #6 of (permalink) Old 07-22-2009, 06:50 PM
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If by continuous duty you mean pull heavy loads for hours at a time, you'll need a larger reservoir or a cooler in the return line, if not both. I ran into the problem when I converted a mower deck from mechanical to hydraulic drive. IIRC the preferred volume for the applicaton was six or more gallons. For space reasons I made it a gallon or so smaller and had no problems. An alternative would be to put a temperature gauge in the reservoir.

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post #7 of (permalink) Old 07-22-2009, 10:38 PM Thread Starter
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I do need a cooler. I have not completed my thinking here. I am trying to think up a combination cooler/heater using engine coolant to help operation in cold weather. The way I plan to modify the flow control valve on the pump, I hope to have low flow through the system till needed to save load on the pump. Then switch to full flow only when the winch may need to be in use.

Wilhelm

I will start using Metric only when the duodecimal system is adopted!!
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post #8 of (permalink) Old 07-24-2009, 09:37 PM
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First off,
Unless you are running an automatic transmission,
You can run your 'Cooler' lines through the Auto Trans ports on your radiator (most have them) to both heat and cool the power steering fluid.

If you are not running a radiator with a trans cooler loop in it, you can run a trans cooler in the summer, and just connect the two hoses in the winter excluding the cooler.
---------------------------

Secondly, Why don't you just use a larger volume capable power steering pump for BOTH power steering and winch?
Worked great for us.
Got a power steering pump with remote reservoir from a 'Hydro Boost' vehicle (diesel truck) and it works GREAT since the fluid is bypassed 99.9% of the time anyway...

Addendum from Second point,
We decided we needed a 'Reservoir' for more volume.
Not so.

Since the system is 'Full' at all times, 99.9% of the time full, but 'Bypassing',
You really don't need a big reservoir....
For a reservoir to be any good, you have to DUMP the fluid into it,
Let the bubbles filter out,
Suck from the bottom (no good if you are on your side or up-side-down),
And suction back into the pump.

Total loss systems SUCK unless you need HUGE volume to cool and eject air.
--------------------------------

Third, if you need 'Slower' than the slow speed on the hydraulic Mile Marker winch, simply throttle down and run the pump slower...
Speed is NOT an issue with the Hydraulic Mile Marker which we use the most.
----------------------------------

Hydraulic Steering/Hydro-Static drive 101...

99.9% of the time, the fluid/valves are in 'Bypass'.
The system is always 'FULL', just circulating in a closed loop.
Unless you are going to do HUGE, LONG pulls, Temperature is going to be the last of your worries!
Boredom is the biggest thing to fight when you are winching with a 'Juice' winch!

Just some tidbits from the peanut gallery!

So Many Cats, So Few Recipes...
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