Today's Message Index:
----------------------
1. 11:13 AM - Re: More oil leakage (desmor944@aol.com)
2. 11:44 AM - Re: More oil leakage (Roger Baker)
3. 05:39 PM - Engine Through Bolts (Gil Lipaz)
Message 1
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| Subject: | Re: More oil leakage |
Walt and Coop,
Agree on the limitations of tab washers and self locking nuts in general.
I work in the world of industrial gas turbines and steam turbines where the
se machines are run 8,000 to 9,000 equivalent operating hours per year, wit
h overhauls scheduled at 40,000 hours or more. Vibration and high temperat
ures are the norm during operation.
The solution to keeping parts in place is the extensive use of Nord-Lock wa
shers under bolt heads and nuts on studs. These are the ultimate replaceme
nt for split or star type lock washers. The only caution would be against
use with a hardened (> Rockwell 40) nut.
Nord-Lock washers are readily available from Fastenal, Grainger, McMaster-C
arr, MSC Direct, etc. Sizes start at M3, and prices are about $0.50 per pa
ir up to M8.
Manufacturer's web site is www.nord-lock.com , and this link will show how
the washers work www.youtube.com/watch?v=mgwmuZuJ02I . The new X-Series
is overkill for our applications; the standard wedge locking washer is suff
icient.
Many pairs have found their way firewall-forward on my CJ.
Rich Desmond
-----Original Message-----
From: Walter Lannon <wlannon@shaw.ca>
Sent: Thu, Jul 4, 2013 1:17 pm
Subject: Re: Yak-List: More oil leakage
Hi Coop;
There are self-locking 4 x 0.7 mm nuts available in both carbon and
stainless steel from Fuller Metric and other suppliers. Like all nylon typ
e
lock nuts they should nut be used in areas where the temperature may exceed
250 deg.F (120C). Generally OK for many areas under the cowl but should b
e
evaluated for specific areas on the engine
I have never been impressed with tab washers and in some cases prefer a
simple split type lock washer.
Walt
-----Original Message-----
From: Adrian Coop Cooper
Sent: Wednesday, July 03, 2013 9:37 PM
Subject: Yak-List: More oil leakage
<cooperairracing@gmail.com>
Hi all. My engineer and I have been tracking down an oil leak on my CJ's
Housai 285hp. With the cowls removed and a good Varsol wash down/spray we
ran the engine. Sure enough we found the problem, the starter distributor
was loose. Even though the "lock tabs" were correctly in place, the three
7mm nuts had backed off. Now any of you who have had this issue know that
these nuts are a B***h to get at and tighten.
After two hours of work and several specialty bendings of 7mm wrenches they
are now tight. (I need to go buy replacement wrenches tomorrow)The space
behind the air lines and banjo fittings is too small for a socket and its
impossible to even get a universal socket in there. Has any one been able t
o
find Turbine nuts that fit those studs?
The smaller size of the Turbine nuts should make this a manageable job and,
of course, they are self locking. I don't know if there is an equivalency o
f
the studs to a US SAE size, but that would be great. Any one have the answe
r
to that?
Thanks Guys.
Coop.
--------
Coop
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=403907#403907
Message 2
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| Subject: | Re: More oil leakage |
I learn something nearly everyday...and occasionally I learn something spect
acularly useful...such as Rich's info about Nord-Lock washers.
Roger Baker
On Jul 5, 2013, at 11:01 AM, desmor944@aol.com wrote:
> Walt and Coop,
>
> Agree on the limitations of tab washers and self locking nuts in general.
I work in the world of industrial gas turbines and steam turbines where the
se machines are run 8,000 to 9,000 equivalent operating hours per year, with
overhauls scheduled at 40,000 hours or more. Vibration and high temperatur
es are the norm during operation.
>
> The solution to keeping parts in place is the extensive use of Nord-Lock w
ashers under bolt heads and nuts on studs. These are the ultimate replaceme
nt for split or star type lock washers. The only caution would be against u
se with a hardened (> Rockwell 40) nut.
>
> Nord-Lock washers are readily available from Fastenal, Grainger, McMaster-
Carr, MSC Direct, etc. Sizes start at M3, and prices are about $0.50 per pa
ir up to M8.
>
> Manufacturer's web site is www.nord-lock.com , and this link will show how
the washers work www.youtube.com/watch?v=mgwmuZuJ02I . The new X-Series i
s overkill for our applications; the standard wedge locking washer is suffic
ient.
>
> Many pairs have found their way firewall-forward on my CJ.
> Rich Desmond
> -----Original Message-----
> From: Walter Lannon <wlannon@shaw.ca>
> To: yak-list <yak-list@matronics.com>
> Sent: Thu, Jul 4, 2013 1:17 pm
> Subject: Re: Yak-List: More oil leakage
>
>
> Hi Coop;
>
> There are self-locking 4 x 0.7 mm nuts available in both carbon and
> stainless steel from Fuller Metric and other suppliers. Like all nylon ty
pe
> lock nuts they should nut be used in areas where the temperature may excee
d
> 250 deg.F (120C). Generally OK for many areas under the cowl but should b
e
> evaluated for specific areas on the engine
>
> I have never been impressed with tab washers and in some cases prefer a
> simple split type lock washer.
>
> Walt
>
> -----Original Message-----
> From: Adrian Coop Cooper
> Sent: Wednesday, July 03, 2013 9:37 PM
> To: yak-list@matronics.com
> Subject: Yak-List: More oil leakage
>
> <cooperairracing@gmail.com>
>
> Hi all. My engineer and I have been tracking down an oil leak on my CJ's
> Housai 285hp. With the cowls removed and a good Varsol wash down/spray we
> ran the engine. Sure enough we found the problem, the starter distributor
> was loose. Even though the "lock tabs" were correctly in place, the three
> 7mm nuts had backed off. Now any of you who have had this issue know that
> these nuts are a B***h to get at and tighten.
> After two hours of work and several specialty bendings of 7mm wrenches the
y
> are now tight. (I need to go buy replacement wrenches tomorrow)The space
> behind the air lines and banjo fittings is too small for a socket and its
> impossible to even get a universal socket in there. Has any one been able t
o
> find Turbine nuts that fit those studs?
> The smaller size of the Turbine nuts should make this a manageable job and
,
> of course, they are self locking. I don't know if there is an equivalency o
f
> the studs to a US SAE size, but that would be great. Any one have the answ
er
> to that?
> Thanks Guys.
> Coop.
>
> --------
> Coop
>
>
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=403907#403907
>
>
>
>
>
>
>
>
>
>
>
> et="_blank">http://www.matronics.com/Navigator?Yak-List
> tp://forums.matronics.com
> _blank">http://www.matronics.com/contribution
>
>
>
>
>
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Message 3
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| Subject: | Engine Through Bolts |
Does anyone know where to obtain the socket that fits the through-bolts on the
housei? It is impossible to torque these bolts without the right socket and
a standard socket won't go on
Gil
Gil Lipaz
310-245-7078
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