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19. Brakes update

danny_galaga

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I put it off for a while but I finally contacted the factory about the brake pedals as they were binding such that when you had full right rudder the brake pedal wouldn't move. They sent out an update kit and I swapped the faulty parts.

 

Last night I finally got around to bleeding the brakes. I had a hell of a time. Couldn't do it 'bottom up' I assumed because of the cheapo oil can I was using. So I decided to bleed them the regular automotive way. Still no joy. Then I started to think maybe I had left mixed with right on the lines. So I had Jo pump a right pedal while I cracked the left bleed nipple. Some oil seemed to come out! Well, I must admit I lost my shit and yelled and carried on so much I scared the dog!

 

When I calmed down we played around with it a bit longer and it occurred to me it was acting more like a blockage than anything. I wonder. .

 

Turned the park brake 'on' and voila! Oil squirted out the bleed nipple! 

 

See attached for my fix !

IMG_20191208_224000~2.jpg

 

Edit: I haven't checked yet, but it seems likely to me that the park brake is a one way valve, which means my 'fix' won't work- the park brake will be 'off' in both position!

 

so for now I may just put a cover over it. Not all ultralights have a park brake.

 

it also occurred to me that the park brake is assymetrical when it comes to mounting it in the Bushcat. I found a pic from when I was installing it and sure enough there is only one way you can put it in (see pic). This means the park brake was assembled incorrectly at the Matco or Bushcat factory! Grrrr

received_1847814112029878.jpeg



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With hydrolic,s a simple valve in the brake line will act as a park brake, brakes on turn park valve & brakes stay on.

spacesailor 

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Good point! I'll test it out once all the lines are bled ?

 

its quite an epic journey to get that floor board off again so fingers crossed!

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It is a simple and straightforward process to bleed the brakes on the BushCat if all has been installed correctly. Use a syringe with a tube attached to bleed nipple on each calliper. 

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"Use a syringe with a tube attached to bleed nipple "

If you reverse the process, Fill syringe with fluid, attach to wheel brake nipple,  push fluid Up the line to the reservoir, just make sure its not over full.

Saves fighting the law of, air bubbles raising to the surface, when pushing fluid down the brake-line.

spacesailor

Edited by spacesailor

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On 10/12/2019 at 8:12 PM, Downunder said:

You WILL want a park brake.

You underestimate how lazy I am!

Edited by danny_galaga

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Yes, all I have is park brake off option as it stands. The other position essentially turns off the brakes !

 

?

Edited by danny_galaga

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