An open forum for all enthusiasts of the classic 60 series Nissan Datsun Patrol to gather and share information and gain knowledge. Members share off-road stories, restoration advice, modification ideas in an atmosphere free of a single controller. The fo
Won't run? Engine, cooling system, fuel pump, carb, clutch, tranny, brakes, etc. The old messages from the NPCA 'Engine & Mechanical' category are here.
I have leaking front cylinder(s) in my 1967 L60, so I took one apart today to take a look. It was quite rusty inside, but after cleaning it all up it doesn't look like any pitting. I'm hoping a light honing will get rid of the surface rust. The piston itself has a few spots of rust, but the cup looks OK. But the dust cover has a couple small slices in it that I could see when I turned it inside out. I've never rebuilt a brake piston before, so I'm wondering is the dust cover having a couple very small slices in it a problem? Could this be the source of the leak? If so, where would be the best place do you think that I could obtain a replacement, or a rebuild kit? Are there any compatible parts anyone knows of that I could get at a NAPA store maybe? I've emailed a couple online Nissan dealers who all say they don't have anymore of these in stock any more. Thanks for any help or advice because this new territory for me
Welcome Rick 67Patrol,
I have a 67 also.......and a 65.......and 62 and I'm still married!
to answer better maybe post some shots of the cyl and whole situation, maybe they dont need full rebuild.
I think these two do good work ..... http://www.brakecylinder.com/sleeve1.htm
It sounds like you are on the right track to rebuilding the brake cylinders. If there is no pitting in the cylinder walls honing should be all the need - you shouldn't need to have them re-sleeved. The dust cover having cracks in it won't be the source of the leak because the dust cover is simply that - a dust cover, not a seal of any type. It just servers to keep dirt from the piston assembly. If there is fluid under the dust cover then it's most likely the piston cup on the cylinder allowing leakage.
There is a topic here with links to several vendors that carry various Patrol parts, and using the Search will bring up other recent threads about this same topic with lots of helpful pointers. This vendor carries rebuild kits for the brake cylinders: http://www.new-datsun-parts.com/nissan- ... parts.html . And don't hesitate to ask because people will trip over themselves attempting to get you a good answer.
So now you should introduce yourself and show us your Patrol!
I rebuilt one on Plow Patrol some time ago and used a condom under the cracked dust cover to help keep it protected. Just a thought if you can't score a replacement.
bosque wrote:Welcome Rick 67Patrol,
I have a 67 also.......and a 65.......and 62 and I'm still married!
to answer better maybe post some shots of the cyl and whole situation, maybe they dont need full rebuild.
I think these two do good work ..... http://www.brakecylinder.com/sleeve1.htm
Thanks for the leads on those two rebuilders If honing doesn't work.
Great idea to post some shots, though I'm not much of a photographer, but I did take a couple photos to show, but I'm not having any luck uploading them tonight. I'll try again tomorrow.
It sounds like you are on the right track to rebuilding the brake cylinders. If there is no pitting in the cylinder walls honing should be all the need - you shouldn't need to have them re-sleeved. The dust cover having cracks in it won't be the source of the leak because the dust cover is simply that - a dust cover, not a seal of any type. It just servers to keep dirt from the piston assembly. If there is fluid under the dust cover then it's most likely the piston cup on the cylinder allowing leakage.
There is a topic here with links to several vendors that carry various Patrol parts, and using the Search will bring up other recent threads about this same topic with lots of helpful pointers. This vendor carries rebuild kits for the brake cylinders: http://www.new-datsun-parts.com/nissan- ... parts.html . And don't hesitate to ask because people will trip over themselves attempting to get you a good answer.
So now you should introduce yourself and show us your Patrol!
Thanks for the welcome, I'll have to post up some pics of the patrol during happier times when it had working brakes and do an intro.
There was rusty fluid under the dust cover, so it may be the piston cup that is leaking, unless there are small pits in the cylinder I can't see. I'll try posting some pics tomorrow.
I think I can pick up a honing tool that will fit on my drill for around $20-$30, so I'll give that a try. Thanks for the lead on those piston cups and dust covers! I will definitely have to get some of those.
MadTripper wrote:I rebuilt one on Plow Patrol some time ago and used a condom under the cracked dust cover to help keep it protected. Just a thought if you can't score a replacement.
bosque wrote:Welcome Rick 67Patrol,
I have a 67 also.......and a 65.......and 62 and I'm still married!
to answer better maybe post some shots of the cyl and whole situation, maybe they dont need full rebuild.
I think these two do good work ..... http://www.brakecylinder.com/sleeve1.htm
Emory cloth could probably work. I also use Scotchbrite pads for stuff like that. They're the green scrubby pads that people usually use for washing pots and pans.
It's hard to tell for sure from the pics, but you may have some pitting there. If you can feel it with your fingernail, it's pitted.
I finally finished installing all the new brake cylinders all the way around, but in the process of removing the front driver side one I broke a brake line:
IMG_8640.JPG
I'm sure this is already somewhere on this great site, but I'm wondering what replacement line to get? They have several at my Auto Zone O'Reillys, with several flares. They are all 8 inches long, 3/16" x 08". Now do I want US or metric threads with what type of flare? The guy at one store told me they were metric with a bubble flare, and the other guy told me they were U.S. with a standard flare, so I'm confused. Or would I be better buying a flaring tool and doing it myself and using the existing fittings? And is there a special tool I need for bending? The guy at the store said their tool that they loan out was too big for such small bends as this one.
Thanks!
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