[PSUBS-MAILIST] hydraulic fluid choice

[Alan James via Personal_Submersibles]

Hank,
a Minn kotta motor seems like a huge overkill.
I would think that the WD40 would be more destructive than the hydraulic oil anyway.
There are lots of oils you can use for hydraulics; perhaps find one that is
going to be kinder to your motor windings & just drop a brushed motor in it.
The oil might be more viscous, but you could perhaps increase the pressure on the
motor brushes to avoid what Dr Phil calls "Herky Jerky" movement of the motor
caused by centrifigal force of the oil at speed, pulling the brushes off the commutator.
Easy to drop a motor in a bucket of oil & test it.
You get more wear of the brushes with more pressure, but you will only be using
the hydraulics when you find that gold bar; so this would be a non issue.
Cheers Alan

      From: hank pronk via Personal_Submersibles <personal_submersibles at psubs.org>
 To: Personal Submersibles General Discussion <personal_submersibles at psubs.org> 
 Sent: Monday, December 5, 2016 6:04 AM
 Subject: [PSUBS-MAILIST] hydraulic fluid choice
   
Alan,You made me realize a problem I will have with WD40 as hydraulic fluid.  It dose harden plastic, and my hyd lines will be PH nylon lines.  So my solution is,,,, my hydraulic pump will be driven by a Minn Kota thruster motor.  The motor will be filled with WD40 or similar.  The motor\pump will then be submerged in the hydraulic oil reservoir  along with the electric valve bank.  The reservoir will be a fibreglass tank with a rubber lid.  I can use regular hydraulic fluid that is compatable with the valve and pump but not compatible with an electric motor.  Eezy PeezyHank
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