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Re: (ET) Disconnect maintenance on BB600 Elec-trak



"double bolt" it? perhaps this means use two nuts - I'd still want a lock washer in there.

Actual copper would be too soft for a lock washer, bolt or nut. I use silicon-bronze split washers as a compatible conductive material on things like the disconnect (which could appear "discolored" as compared to the brass nuts?). Can arguably use typical zinc-plated lock washer as a somewhat similar metal to the lugs.

The ideal choice can get tricky as choice of materials/plating vs available styles can complicate things. I do like the wavy washers for low torque studs on PbA batteries which may creep out of the lead over time.


On 02/25/2019 4:19 pm, Chris Zach wrote:
I'll let this be an experiment. If it fails I'll get copper lock
washers for maximum conductivity. Or another copper bolt and double
bolt it.

On 2/25/2019 4:24 PM, David Roden wrote:
On 25 Feb 2019 at 12:47, Chris Zach wrote:

Since the lock washer was also discolored I dispensed with it and just
tightened the brass bolt hard.

You really don't want to dispense with lock washers on a vehicle that jolts
and vibrates.  You'll be back in the same place before long.

Smart EV folks use lock washers on bolted connections.  I'll use split
washers in a pinch, but my preference is for either Bellville (dished)
washers or wave washers. I keep a supply of them on hand in the sizes I'm
most likely to need.


David Roden - Akron, Ohio, USA

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