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  1. bigboytoy

    JLG 450a has no drive power

    something is by passing the oil pressure ... ?? ... I would check that theory with tests ... maybe one drive motor is letting it bypass .. jack it up ..? I am no expert good luck
  2. bigboytoy

    AC compressor locking up

    well until page 4 when I saw the PDF from Sanden about the pump numbers describing it with the word piston not just the word axial pump .. I was not sure ... so complain about my delivery if your that way if you want ... but I read all of your comments even though you don't believe it ... I just...
  3. bigboytoy

    AC compressor locking up

    I'm not changing my name .... sorry you feel that way ... I though the "vane pump" would of been a common frustration of techy mechanics anywhere ... your free to move on and be more productive ...
  4. bigboytoy

    AC compressor locking up

    dismantled the compressor ... it's got 6 pistons way better than kubotas vane pumps.. but running dry on oil made it turn stiff .. close examination I see aluminum flakes from pistons sockets disintegrating but not much in the way of burnt oil ... the compressor replacement cost is reasonable...
  5. bigboytoy

    AC compressor locking up

    sorry ....
  6. bigboytoy

    AC compressor locking up

    so put just 150# of nitrogen (gas would work to) ... ran compressor it turns but squeaks , I believe the main bearing is the squeak it also heats up that end of compressor thats probably needs replaced unless oil is dry maybe ... I will remove it to know ... still the flow is weak through...
  7. bigboytoy

    AC compressor locking up

    thanks that info is helps thanks ...
  8. bigboytoy

    AC compressor locking up

    2015 60g serial # 1ff060gxegj287918
  9. bigboytoy

    AC compressor locking up

    ok inquiring minds want to know ... mine too... verified not a clogged dry issue ... simply pulled out put side and it released 250# of pressure in 10-20 seconds ... hooked back up ... sending it to the metering device evaporator ... run it up to 250# on high side... low side is on 30 climbing...
  10. bigboytoy

    AC compressor locking up

    I can verify that ... by undoing the output of that .. might as well ... I can aways get more nitrogen , its getting low...
  11. bigboytoy

    AC compressor locking up

    well sorry ... I don't think anyone actually knows what kind of pump it is including me ... I was hoping someone would ... I stopped there on that answer ... because I found something that also causes lock ups ... I still would like to know ... any body ?
  12. bigboytoy

    AC compressor locking up

    nitrogen is standard HVAC tool ... for leak detection .. it is harmless to the system as air would add water ... all new coils come with a nitrogen purge .. I use a high pressure gauge and am able to achieve 500# if I want .. thats kind of high and scary ... 250# should be enough to expose slow...
  13. bigboytoy

    AC compressor locking up

    what I was fishing for is information on vane pumps ... if it was what John deere used on there 60g or any other equipment for that matter its not clear what the product is .. only someone who has taken one apart would know ... I guess I didn't say "vane pump" enough nor do many people have...
  14. bigboytoy

    AC compressor locking up

    I finally got to troubleshoot the ac ... i was so scared of a vane pump issue from last battle with a svl 90 loader.. so its out of gas ..I pressure test with 220psi of nitrogen then soak with soap and find nothing leaking ... I start it and run AC it squeaks a little but doesn't lock up...
  15. bigboytoy

    AC compressor locking up

    I wish it was that simple ... but its more than the compressor type issue ... change one twice only to fail after 3-5 hrs of run time and lock up ... something else is going on
  16. bigboytoy

    AC compressor locking up

    2015 JD 60G ... it has a Sanden SD7H13 model 8957 compressor ...
  17. bigboytoy

    AC compressor locking up

    I wish I could change to piston type its hard to identify what kind of pump it is on this John Deere but it looks just like the vane pump on a kubota loader svl90 ... still looking at parts and prices... I will talk to John deere people tomorrow in person ... maybe some mechanics too ... I am...
  18. bigboytoy

    AC compressor locking up

    well keep in mind that I can replace the compressor that is locking up ... it will cool perfectly fine for 3-5 hrs ... enough time to circulate the crud to the new compressor ... then it locks up ... stop leak usage i see no evidence of, ussually it leaks a glowing type fluid .. out side of the...
  19. bigboytoy

    AC compressor locking up

    school of hard knocks... there it is crud ... simply band sawed down the header .. look at the little black dots on the fin cuts ... and I flushed this coil ... you can not get it clean .. the vane pump is a bad idea ... poor engineering
  20. bigboytoy

    AC compressor locking up

    I still have a condenser in my scrap pile I will cut it open and see the dirt... just for proof?
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