Power Steering Pump Specs - Jeep Commander Forums: Jeep Commander Forum
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post #1 of 13 (permalink) Old 08-25-2009, 02:55 PM Thread Starter
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Power Steering Pump Specs

Does anyone know the PSI rating on the Power steering pump for the 3.7L Commander?
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post #2 of 13 (permalink) Old 08-25-2009, 09:46 PM
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Quote:
Originally Posted by CommanderChaos View Post
Does anyone know the PSI rating on the Power steering pump for the 3.7L Commander?
I don't believe I've ever seen a specification for operating pressure, but there is a check valve (internal, not serviced) that supposedly bypasses when line pressure exceeds 300 p.s.i. (like when you hit the end of travel, sometimes you can hear it hisssss)

Curiosity comes into play.....watcha trying to figure out?

Rob
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post #3 of 13 (permalink) Old 08-25-2009, 09:52 PM Thread Starter
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Quote:
Curiosity comes into play.....watcha trying to figure out?
I'm shopping for winches. I'm thinking of the Mile Marker hydraulic winch. Most of their models specify a need for 1500psi and 3.5 cfm. I just want to know what's compatible.
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post #4 of 13 (permalink) Old 08-25-2009, 10:12 PM
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Interesting,

I doubt if a p/s pump would tolerate long term (winching) load though, even if the pressure was adequate.
Not a lot of oil and no effective means of cooling it.

Rob


P.S. I thought those used their own duty cycle pump????

Guess I was incorrect.

Last edited by robby; 08-25-2009 at 10:14 PM. Reason: Adding thoughts
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post #5 of 13 (permalink) Old 08-25-2009, 11:04 PM Thread Starter
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The reviews for the hydraulic winches are great. Extended run times, doesn't overheat, works while submerged, etc. It is designed to us the PS steering pump. You just disconnect the hose going from the PS Pump to the steering box, connect a new hose that goes from the PS Pump to the winch, connect another from the winch to the steering box then add more fluid to take up the extra volume used by the additional hose. The only electrical part of it is to turn it on or off. I think 2amps is all.

I wanted the 10,500 lb winch but it states that it doesn't work with "Jeep" PS Pumps and I would have to go with the 75 series 9000lb winch. I wasn't really sure if Mile Marker was thinking of all Jeeps or just wranglers/CJ's.
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post #6 of 13 (permalink) Old 08-25-2009, 11:16 PM
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Interesting,
I guess a phone call to them is in order.

But....10500???? Good Lord my man! What are ya planning on lifting?
Two Commanders at once....up a cliff?? LOL...I think the winch and whatever it's attached to will get torn off before that kind of pull is achieved.

Scary mental picture,
Rob
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post #7 of 13 (permalink) Old 08-25-2009, 11:38 PM
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Who says that you cannot cool power steering fluid. I did and it is on the Forum for all the world to see that I screwed up. I mistakenly connected the power steering fluid lines to an extra cooler when I thought it was the transmission lines. By the way the power steering fluid is cooled in the bottom of the radiator. The hoses connect on the drivers side. There is a thread on here somewhere, showing my goof up.

https://www.jeepcommander.com/forums/...ead.php?t=5329

Here it is.

2007 Jeep Green Limited 4.7 Flex Fuel, RR 2.5" 4 inch Superlift coils on rear, 1.5" Spacers, Bridgestone 265/70/17, K&N CAI, Flowmaster, Diamond Plate Locking Trunk, Blue Ox Baseplate w/D-rings, "Get Lost 4X4" Front Bumper, T-Max 9000 winch, "Get Lost rear tire carrier, 30 gal second gas tank.
Second 2007 Jeep Green Limited Leather HEMI QDII VES Uconnect Flowmaster OEM Skids Tow Package

Maybe the two will meet up soon edit: they did , I now have 2,now gave 1 away...and got it back again.

Last edited by HueyPilotVN; 08-25-2009 at 11:41 PM.
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post #8 of 13 (permalink) Old 08-25-2009, 11:49 PM
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Quote:
Originally Posted by HueyPilotVN View Post
Who says that you cannot cool power steering fluid. I did and it is on the Forum for all the world to see that I screwed up. I mistakenly connected the power steering fluid lines to an extra cooler when I thought it was the transmission lines. By the way the power steering fluid is cooled in the bottom of the radiator. The hoses connect on the drivers side. There is a thread on here somewhere, showing my goof up.

https://www.jeepcommander.com/forums/...ead.php?t=5329

Here it is.
I think only the 4.7 and 5.7 Commanders with the tow package have the heavy duty transmission cooling. CommanderChaos has a 3.7.

2006 Steel Blue 5.7L HEMI Limited 4x4 Build Date: June 9, 2006 Hour 14
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Quadra-Drive II, NAV, DVD, Trailer Tow Group IV, Off-Road Group II, Remote Start, UConnect, Rear Backup Camera, Chrome Wheels,
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post #9 of 13 (permalink) Old 08-25-2009, 11:58 PM
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Does the 3.7 have a power steering cooler in front of the radiator?

2007 Jeep Green Limited 4.7 Flex Fuel, RR 2.5" 4 inch Superlift coils on rear, 1.5" Spacers, Bridgestone 265/70/17, K&N CAI, Flowmaster, Diamond Plate Locking Trunk, Blue Ox Baseplate w/D-rings, "Get Lost 4X4" Front Bumper, T-Max 9000 winch, "Get Lost rear tire carrier, 30 gal second gas tank.
Second 2007 Jeep Green Limited Leather HEMI QDII VES Uconnect Flowmaster OEM Skids Tow Package

Maybe the two will meet up soon edit: they did , I now have 2,now gave 1 away...and got it back again.
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post #10 of 13 (permalink) Old 08-26-2009, 12:07 AM
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Chaos, sounds like what you want to do is get a bracket made up that will bolt onto the engine somewhere. From there you can get a standard hydro pump that they would use on a commercial mower or piece of construction equipment. Then all you would have to do is tie it into the belt on the engine. That way you can go with a dedicated hydro system for the winch and achieve the pressure you need at the volume needed. I know of a couple commercial mowers that use the same style belt to run the hydro motors as the serp belt on the XK. Not an easy project at all but it can be done.

Bright Silver 4.7L 2.25 RR/OME lift, Kumho KL71 265/70/17, Flashpaq, Lights, rack, intake, Super44, mopar skids, 4x belly guard, rear fog lights, MM9500 winch, GetLost4x4 winch mount

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