fbpx
Login

 

Jump to Forum..

weep hole at water pump is weeping

in 912 / 914 Technical Questions 12 years ago

  • Re: weep hole at water pump is weeping

    by » 12 years ago

    Do you first fit the pumpshaft onto the rotaryseal on the tool. Then press the outer part of the rotay seal inside the ign housing. Then press back out the shaft with the inner ring of the seal back out, place the gear into place, then finally press the shaft w/inner ring into the ing housing thorugh the gear ? :blink:
      
    Report

  • Re: weep hole at water pump is weeping

    by » 12 years ago

    Thomas,

    You've got it right.

    Press the shaft onto the rotary seal using the rotary seal tool.

    Press the shaft with the rotary seal installed into the housing and through the gear using the tool.

    The rotary seal is a one piece unit and MUST be installed with the tool. The reason is that the inner and outer part of the seal are connected with a rubberized fabric diaphragm inside. When being installed the inner and outer parts of the seal must move together at a specified distance from each other or the inner diaphragm will be destroyed. The tool insures that this critical distance is maintained while the seal is being installed.

    Pressing the shaft back out may or may not be necessary. If you do have to press it back, it will only be a fraction of a mm. Just enough to align the washer with the housing. Be sure to drill the right size hole in the flat metal plate. The hole (I don't remember the size but it's in the heavy maintenance manual) should be just big enough to accept the shaft. When you place the shaft in the plate hole, the rotary seal will come to rest against the plate. When you press the shaft back with the bolt, you are actually pushing the shaft back through the inner portion of the rotary seal. BE VERY CAREFUL if you have to press the shaft back out. If you go too far out, you cannot press it back in and will have to start over with a new rotary seal. The rotary seals cannot be removed without destroying them.

    I don't know if I'm doing a very good job of describing this job. If anyone else can help, please do.

    Bill.
    Thank you said by: Thomas Hauklien
      
    Report

  • Re: weep hole at water pump is weeping

    by » 12 years ago

    Thanks Bill :)

    So if I have a perfectly flat plate behind the ign housing on the seal flange while pressing the new shaft in, it should theoretically be close to perfect once flush with the flange ? Then just check that the flanged part of the cone end on the shaft aligns with the pump flange? Think I got I now.

    By the way. Would you recommend to preheat the gear ?
      
    Report

  • Re: weep hole at water pump is weeping

    by » 12 years ago

    Hi Tomas

    When you press the shaft in with the tool, just put the washer and impeller on and check the clearance between impeller and housing and then put water pump housing on and check clearance. Just make sure nothing is rubbing before you rebuild the engine.

    Cheers Mark
      
    Report

  • Re: weep hole at water pump is weeping

    by » 12 years ago

    Sweet, thanks ! I'll try to post some pictures to help others out as well
      
    Report
You do not have permissions to reply to this topic.
Related Topics
Title Category Replies
New fuel pump 914 912 / 914 Technical Questions 4
912 fuel pump shelf life 912 / 914 Technical Questions 6
915iS fuel pump fittings 915iS Technical Questions 5
995527 582 OIL PUMP Parts 0
primer pump 2 Stroke Technical Questions 2
Follow Us

Recent Videos

Safety First!

 

To receive critical-to-safety information on your ROTAX Engine, please subscribe to
ROTAX-OWNER.COM

ROTALK News



ROTALK NEWS Episode 5
Rotax-powered Sling aircraft from The Aircraft Factory, the AVMAP Navigation and engine monitoring system, and the Rotax powered Tucano Experimental and Light-Sport Aircraft.



ROTALK NEWS Episode 4
ROTAX's 915iS-powered Aquila A211 test aircraft, the Scheibe SF-25C Falke (first-ever 912-equipped aircraft!) and ROTAX factory in Gunskirchen, Austria.


ROTALK NEWS Episode 3
Michael Smith's Rotax-Powered Searey Circumnavigation, the amazing Rotax-Powered Lockwood Aircam and Anthony Caere's chimpanzee rescue operations.

Prize Giveaway!


SUBSCRIBE NOW
to automatically enter this years draw!

Login