[Roadsters] Right rear brake cylinder leak

[D Riedel]

Thanks fellas, good advice.  I'll grab a cylinder from Ross once I confirm
that's the problem, see below.

That's interesting about the metric/SAE wrench issue.  I thought they were
SAE - I have a 3/8 + 7/16 combo line wrench which I bought to work on the
Roadster... I've used it on the clutch slave, certainly.  Somehow, it
really didn't seem to fit, so I grabbed a 10mm/11mm.

11mm = 0.4331"
7/16 =    0.4375"

Not sure how I'd fail to get the slightly larger 7/16" on there... maybe
it's because I was lying upside down on the driveway with my head under a
car at 8:30 at night?

Meanwhile, having popped the drum off, everything inside looks good.  Shoes
are ~new, which is nice, and there's no brake fluid in there.  The cylinder
doesn't really seem to be losing fluid - not from that side, anyway.  I've
flushed and bled that corner and topped-up the M/C and haven't lost any
fluid since.  Mysterious?

-dave



On Tue, Jul 8, 2014 at 6:33 PM, Stan Chernoff <az589 at lafn.org> wrote:

> Dave,
>
> The hex dimension on the tube fitting for the rear brake cylinder is 7/16"
> .  While 11mm is close to 7/16" you would waste your money if you purchased
> metric tubing wrenches to work on a Datsun roadster since all of the brake
> tubing fittings are SAE.
>
> Stan
> ////////////
>
>
> At 05:52 PM 7/8/2014, Gary and Cindy Ault wrote:
>
>> Dave,
>>
>> Although Graeme's advice is always well thought-out, and you can't go
>> wrong with new cylinders, if you have the additional time, I'd take the
>> leaking cylinder apart, and check the bore.  If it is smooth (not pitted)
>> and
>> the piston is not corroded, I'd use a repair kit, and I have done so
>> successfully.
>>
>> As to the size of the nuts, do yourself a favor and buy a set
>> of metric flare nut wrenches:  9 x 11 and 10 x 12, or the equivalent.
>>  They
>> grip the nuts on nearly all sides, don't slip, and one of those sizes
>> will fit
>> the nuts.  My guess is 10mm.  (I have both metric and SAE flare nut
>> wrenches
>> in my box.)
>>
>> Gary
>>
>> ________________________________
>>  From: D Riedel
>> <stamuki at gmail.com>
>> To: datsun-roadsters at autox.team.net
>> Sent: Monday, July 7,
>> 2014 3:57 PM
>> Subject: [Roadsters] Right rear brake cylinder leak
>>
>>
>> Looks like
>> my right rear cylinder is leaking.  A quick confirmation,
>> please:  are the
>> nuts on the brake lines for a '69 2000 10mm?
>>
>> Also, what are my options here
>> and which is(are) preferred?  New cylinder?
>> Rebuild kit?  Alternative
>> cylinder?
>>
>> Thanks everyone...
>>
>> --
>> Dave Riedel
>> '69 2000
>> Victoria, BC
>> ________________________________________
>>
>
>
>


-- 
Dave Riedel
'69 2000
Victoria, BC