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Kidoo's avatar
Kidoo
Explorer
Jan 17, 2014

Happijac - Unhappy

Hi, anybody took their Happijac electric motor apart when seized? Or oiled them? Can we take the cap off to lubricate inside? Apparantly the oil seal that is on the output shaft is not making it's job to keep moisture out.

I got two of my electric motor on the Happijac seized. I took it to an electric shop and he took one appart to clean it. There was some rust on the brushes, motor works fine now.

He had to make a cut along the housing to take it appart, do not know if it will last. He just hitted the other one and it worked.

I saw a thread on another forum stating that you can prevent rust or water to sit inside the motor. He was talking about the Weep hole under the motor and spraying some oil on the top. I found the weep hole at the bottom but do not see how I can spray oil from the top?
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9 Replies

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  • Kidoo's avatar
    Kidoo
    Explorer
    Jan 18, 2014
    Thanks all, also happy to see that HJ sell a rebuilt unit.
  • woodhog's avatar
    woodhog
    Explorer
    Jan 17, 2014
    You can use a hair dryer or heat gun to heat up the plastic case, I had to do this to slide one of ours off...
  • RamTC's avatar
    RamTC
    Explorer
    Jan 17, 2014
    The motor unit (Case) uses two screws that run the length of the motor internally. The bottom end of the motor body (Aluminum cap) was common screw driver slotted, the top Aluminum cap has a small nut. Removing the two nuts will allow the motor caps to free up and you can slide out the whole assembly from the top. The body is just a steel case with heavy magnets attached.

    Also, if you call HJ, they will sell you the whole "rebuilt" head unit, was $95 last year.
  • Kidoo's avatar
    Kidoo
    Explorer
    Jan 17, 2014
    Ram TC, can you tell me how you remove the top cap? Are they sealed?

    And the bottom one, do you use air pressure through the weep hole or just pry it out?

    Many thanks, those motor a very expensive and from what we read on the net, many have problem with them.
  • RamTC's avatar
    RamTC
    Explorer
    Jan 17, 2014
    Kidoo, I had issues with mine as well. If your handy with basic hand tools you can fix the motors yourself, it's just a matter of replacing the top and bottom bearings. Cost is just a couple of bucks each motor and they as good as new.
  • Kidoo's avatar
    Kidoo
    Explorer
    Jan 17, 2014
    OK, I think I get it, you have to blow air through the weep hole to pop the bottom cover?
    Then you drilled holes at the bottom of the cover or inside the motor?

    Did you take the motor out to clean the brushes or can we take the top off to do that?

    I do not know why the guy at the shop cut it in two, he says it was all glued?

    I also see there is some kind of a hole at the top of the motor to Housing, I guess this is to let moisture out.
  • stevenal's avatar
    stevenal
    Nomad II
    Jan 17, 2014
    Yes. I bought one new motor allowing me to rebuild the seized ones one by one without losing use. I use the air compressor trick to take the covers off. I rebuild them with new bearings from Grainger. Since there are several low points in the bottom end cap where water can collect, they go back together with lots of new drain holes. Oiling a rusted bearing might free it somewhat, but you really need to replace it.
  • Kidoo's avatar
    Kidoo
    Explorer
    Jan 17, 2014
    http://forums.goodsamclub.com/index.cfm/fuseaction/thread/tid/25579727/page/3.cfm

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