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Re: (ET) Cheap Chinese Contactors (another fail)

Interesting. I wonder if it's the same blower. Because I have a rebuilt battery pack I can tap off the rear batteries with no problems and because that's the only thing I ever use on the back (the tiller has a long cable to the front) I put the contactor on the blower frame itself.
Oddly enough I have a similar set up on the pressure washer system which is just an E12 shunt wound motor nailed to a generic 1500 PSI pressure washer cart. Mainly so I can turn the pressure washer on and off with a little local switch instead of having to go back to the tractor. 

Works great and can run all day...

C

On 11/19/2023 3:24 PM, Rob Brockway wrote:
If this helps. when I purchased the blower from Bill gun it came with cables and instructions that tied to the PTO contactor.  It has high locked armature current but not as bad as the old snow blower.  I have used the set up with an original contactor for approximately 20 years.
On Sunday, November 19, 2023 at 03:12:25 PM EST, Chris Zach via Elec-trak <elec-trak cosmos phy tufts edu> wrote: 


So as a part of fall I've finally gotten to the point where I needed to
hook up the leaf vacuum. As I wrote about last year, I got tired of
torching the AMP plugs by plugging and un-plugging it so I went with a
36 volt contactor and ran a hot wire from the front contactor enable
signal to the back of the tractor. Now the mower switch fires both
contactors, and the rear blower connects in.

Today I hooked it up, turned it on, nothing. Contactor clicks, no motor.
Tried cycling it a bunch of times and blower came on, but it's really
intermittent. So after being annoyed for awhile and on a charge cycle I
decided to take a look at what was going on.

First I didn't have a spare as I replaced a contactor on the E15 with my
spare (also a shiny new one that was only a few years old). Pulled it,
replaced it with a Club Car contactor (fortunately it's 36 volts), did
another battery charge of leaf vacuuming (the vacuum+drive motor+deck is
one hell of a current draw esp with only two strings since I can't use
the external pack) and while it was charging opened the errant contactor.

What. Complete. Garbage! The disc that goes up against the bolts inside
the contactor was dirty and pitted and oxidized. It appears to be steel
that was maybe copper plated? The bolts *are* copper or at least a thick
plating but overall this thing has the quality of trash.

So... I haven't cut open an old contactor because I didn't need to but I
think these may be 36 volt 1 amp relays, not real contactors and are
thus good for maybe a season? Sad, but oh well. I guess I'll see if
Harold has any real contactors, I'd rather have a good used one than
garbage.

Or we start using old Club Car contactors.

C

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