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Brian IA 
Bronze Level
Joined: 11 Sep 2009
Location: masonville Iowa
Points: 33
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 Topic: M&W dyno
Posted: 17 Jun 2017 at 7:40pm |
I haven't been on here for some time, I always appreciate and respect everyone's input.
I have a friend that wants to borrow my M&W dynano that has set for ten years. I am concerned about the oil condition and what type of oil it takes. Actually any information on this piece of equipment would be helpful.
It is a model Hydro-Gauge Dynamometer p-400 serial number 2357. Any help would be appreciated.
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Brian Lindsay
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Calvin Schmidt
Orange Level
Joined: 11 Sep 2009
Location: Ontario Can.
Points: 4529
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Posted: 17 Jun 2017 at 8:01pm |
Have the same dyno. I'm sure that it uses standard hydraulic oil. Need to warm it up under light load until the gauge is in the green and then turn the water on under load. Sitting shouldn't hurt it.
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Nothing is impossible if it is properly financed
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wayneIA
Orange Level
Joined: 17 Oct 2009
Location: Waverly, IA
Points: 268
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Posted: 19 Jun 2017 at 3:24am |
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My P2000 has a list of hydraulic oils that are suitable for it to be accurate. The list is located under the storage cover on my unit. I simply went to my oil supplier and gave him a couple of the numbers off the list to use for cross reference. As long as the oil in yours isn't burnt or water contaminated, I wouldn't get too worried about it. Basically any hydraulic oil will work, just the ones that are recommended are for the best accuracy.
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dhs
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Joined: 12 Sep 2009
Points: 65
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Posted: 19 Jun 2017 at 6:32pm |
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What is a M&W P400 in good operating condition worth?
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wayneIA
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Joined: 17 Oct 2009
Location: Waverly, IA
Points: 268
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Posted: 19 Jun 2017 at 8:50pm |
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I tried to buy one about 6 years ago that the oil had a slight burnt smell, and quit bidding at $1250. If I remember correctly I've seen a couple sell (including that one) in the $1500-$2000 range. Here's the contact info from Yesterday's tractors of a guy that repairs and sells dynos. Sales,Service & repairs,parts specializing in M&W Dyno. Pete Holtgrew 712-490-2920
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Dave Kratzig
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Joined: 21 Feb 2019
Location: Lynden, WA
Points: 1
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Posted: 21 Feb 2019 at 5:38pm |
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I have a P400 M&W dyno. It is missing the storage cover which apparently lists recommended hydraulic oil. Can anyone tell me what oil is recommended for this dyno? I know it's been said that any hydraulic oil will work but I was curious what is actually recommended.
Thanks.
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Hodgeja
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Joined: 17 Aug 2014
Location: Ohio
Points: 40
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Posted: 24 Sep 2019 at 7:44pm |
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I would like to buy a dyno. Anyone selling one?
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DiyDave
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Joined: 11 Sep 2009
Location: Gambrills, MD
Points: 53415
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Posted: 24 Sep 2019 at 8:07pm |
 dhs wrote:
What is a M&W P400 in good operating condition worth? |
Last one I saw, about 10 years ago, went for $4500, at auction... 
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Source: Babylon Bee. Sponsored by BRAWNDO, its got what you need!
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dhs
Silver Level
Joined: 12 Sep 2009
Points: 65
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Posted: 25 Sep 2019 at 7:32am |
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Sent you a PM.
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Navratilimpl
Bronze Level
Joined: 14 Sep 2020
Location: South Dakota
Points: 1
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Posted: 14 Sep 2020 at 2:58pm |
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If you are still looking I have 1 for sale located in NE South Dakota, Great shape and lightly used. It has not been used in 10+ years so I'm not entirely sure if there are any cracks in the hoses, but no HYD oil under it. glass is in all guages. SN - 24753 model P-400A M&W Hi capacity Hydra-gauge Dynamometer. Let me know if your still looking for 1 and I can get you pictures another way. they are too big for this site.
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