Sleepydogz Posted March 20, 2016 Report Share Posted March 20, 2016 Hi guys so just picked up my first Datsun 620 pick up truck It runs and drive with a few old leaks but it's not stopping The other guy that owned the trick installed a new master cyclinder But the truck won't stop any place I should start looking at?? Or steps on how to bleed the system?? Thanks jc I'll try post post some pics but am new on this site so give me time Quote Link to comment
datson4life Posted March 20, 2016 Report Share Posted March 20, 2016 1st step is look at the inside of every wheel and tire for traces of where leak is at Welcome to ratsun Quote Link to comment
snapp_hunter Posted April 5, 2016 Report Share Posted April 5, 2016 when you bleed the system start farthest from the master cylinder and work to the closest. should go Passenger rear, driver rear, passenger front, driver front. make sure to keep an eye on your fluid levels! Quote Link to comment
flatcat19 Posted April 6, 2016 Report Share Posted April 6, 2016 Hi guys so just picked up my first Datsun 620 pick up truck It runs and drive with a few old leaks but it's not stopping The other guy that owned the trick installed a new master cyclinder But the truck won't stop any place I should start looking at?? Or steps on how to bleed the system?? Thanks jc I'll try post post some pics but am new on this site so give me time Find a service manual. You have a load sending valve in the rear as part of the brake system. That and the brakes need to be bled in a certain way. I am not a 620 owner. I have no clue how it works. If I did though, I'd take the valve out and plumb the brakes normally. Quote Link to comment
Rick-rat Posted April 6, 2016 Report Share Posted April 6, 2016 The load sensing valve was not used until after Aug 75, he has a 74 so it would not have one. If you have no clue, then don't make uninformed statements Quote Link to comment
flatcat19 Posted April 6, 2016 Report Share Posted April 6, 2016 Well, regardless of what the grumpy fucker above me says...I'm seeing 74s that have them. Get a friend, a bottle with a clear hose, some brake fluid and a wrench. Just get to bleeding and see if you have air in any of the brake wheel cylinders. It is also possible that previous owner did not bench bleed master, ruining it. Just attack and see what your results are. Quote Link to comment
darrel Posted April 28, 2016 Report Share Posted April 28, 2016 After bleeding, then you need to adjust the brakes. All drum brakes and they don't have self adjusters. Quote Link to comment
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