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My new 521


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#341 wayno

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Posted 06 January 2017 - 11:25 AM

That is/was "Uncle lau lau's" truck, I have not been by that house in over a year now, don't know if he lives there anymore.


 

 

 


#342 Datsunthug

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Posted 06 January 2017 - 08:00 PM

Pulled the truck in the garage. More like pushed it in cause we're leaving for Disney land tomorrow. Plan on draining the tank getting a fresh filter and checking the filler tube. Going to run compressed air back to the tank.
Should I worry about the carb or just drain it and shoot it with carb cleaner?

#343 Datsunthug

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Posted 11 January 2017 - 12:07 PM

Drained the tank today. About 4 gallons came out, about 1 ga. was water. Blew air back to the tank and drained the carb bowl. Sprayed the carb with carb cleaner to help evaporate any water inside the carb. Need to pick up a fuel filter and fresh gas and I can give the brakes a proper test drive finally. Still need to find the source of the leak but, for now it's covered in the garage and dry.

#344 Datsunthug

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Posted Yesterday, 09:00 AM

Got it back up and running. Brakes feel good. Maybe a little more adjustment and bleeding.
Seems if I pump the brakes they get firm at a higher pedal height. If I'm cruising the first time I hit the brakes they go down a bit further

#345 flatcat19

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Posted Yesterday, 09:29 AM

If you get a firm pedal first pump, it's just low-keep adjusting.

If you have to pump pedal to get a firm feel, you have a leak.

You can't hang if your nuts haven't dropped...it's physics


#346 DanielC

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Posted Yesterday, 09:34 AM

"Seems if I pump the brakes they get firm at a higher pedal height. If I'm cruising the first time I hit the brakes they go down a bit further."

 

This is a very common problem with 521 trucks.  The wheel cylinders have only one port for fluid and air to go in and out of.  You have to allow the brake shoes, and springs to collapse the wheel cylinders, and push any air in the cylinder back out to the bleeder valve.  If you use a pressure or a vacuum bleeder, the exchange of fluid for air never happens in the wheel cylinders. 

 

Bleed the brakes manually, with two people.  The person under the truck has to open the bleeder, when the brakes are applied, and the pedal has to go all the way to the floor, and held there.  With the pedal on the floor, the person under the truck has to wait until all fluid (and air) flow stops.  Then close the bleeder.  Then the pedal can be let up, slowly, and pushed again.  Three full pumps, and refill the master cylinder.



#347 Datsunthug

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Posted Yesterday, 09:58 AM

I'll try bleeding them as you describe danielc