Today's Message Index:
----------------------
0. 12:20 AM - November List Fund Raiser (Matt Dralle)
1. 11:51 AM - New rocker bushing material - possible issue (andysilvester)
2. 12:34 PM - Re: New rocker bushing material - possible issue (Pete Krotje)
3. 02:07 PM - Re: New rocker bushing material - possible issue (Richard Girard)
4. 04:11 PM - Re: New rocker bushing material - possible issue (Keith Pickford)
Message 0
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| Subject: | November List Fund Raiser |
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Message 1
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| Subject: | New rocker bushing material - possible issue |
Received from Jabiru recently, this is news that they changed the bearing material
for the rockers. However, some are reporting issues when this new material
is used on the 'old' rocker lubrication system. Here's it is, for general information
and awareness (if in doubt, call your Jabiru dealer):
Dear Jabiru Dealers and Maintenance Organisations,
We have recently introduced a new type of valve rocker bush material, as shown
in the attached photos. This material has been used in South Africa for some
time with no problems but we have found several cases in Australia where the yellow
bush material degraded very quickly in service within the first hours of
operation. All the issues so far have been in hydraulic lifter type engines
using the old rocker lubrication system i.e. hydraulic lifter engines with an
external oil feed pipe from the crankcase to the cylinder head and solid lifter
types.
Engines where the oil feed for the rockers is carried by hollow pushrods are not
affected.
There are no production engines of this configuration so at the moment this alert
does not affect new production engines.
If you have fitted any of these type bushes to any engine with an external oil
feed pipe please have the engine inspected and let us know if there are any issues.
The inspection can be carried out by removing the rocker covers and checking
the rockers for slop or for any yellow residue. We are also interested
to hear if everything is fine, so please tell us how many engines you have checked
and what the inspections found.
While the investigation is happening these bushes must not be fitted to any engine
with an external oil feed pipe. If you need any of the old type bushes in
a hurry in the meantime please let us know.
Thank you,
Doug Smith
Engineer, Jabiru Aircraft
The pics attached show the new material (I admit to looking at my calendar to see
if it was April 1st). I know I'm 'old-school', but what's wrong with sintered
bronze (oilite) for this job? Swiss cheese, anyone?
C'mon Lynn, I bet you have a comment.....!
Cheers, Andy
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=318059#318059
Attachments:
http://forums.matronics.com//files/jab_new_rocker_bushing_2_134.jpg
http://forums.matronics.com//files/jab_new_rocker_bushing_1_637.jpg
Message 2
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| Subject: | New rocker bushing material - possible issue |
Let's be clear here - - these rocker bushes have only been retrofitted to some
existing engines and no one buying a new engine will not be getting rockers fitted
with the new material.
Pete
-----Original Message-----
From: owner-jabiruengine-list-server@matronics.com [mailto:owner-jabiruengine-list-server@matronics.com] On Behalf Of andysilvester
Sent: Wednesday, November 03, 2010 1:49 PM
Subject: JabiruEngine-List: New rocker bushing material - possible issue
Received from Jabiru recently, this is news that they changed the bearing material
for the rockers. However, some are reporting issues when this new material
is used on the 'old' rocker lubrication system. Here's it is, for general information
and awareness (if in doubt, call your Jabiru dealer):
Dear Jabiru Dealers and Maintenance Organisations,
We have recently introduced a new type of valve rocker bush material, as shown
in the attached photos. This material has been used in South Africa for some
time with no problems but we have found several cases in Australia where the yellow
bush material degraded very quickly in service within the first hours of
operation. All the issues so far have been in hydraulic lifter type engines
using the old rocker lubrication system i.e. hydraulic lifter engines with an
external oil feed pipe from the crankcase to the cylinder head and solid lifter
types.
Engines where the oil feed for the rockers is carried by hollow pushrods are not
affected.
There are no production engines of this configuration so at the moment this alert
does not affect new production engines.
If you have fitted any of these type bushes to any engine with an external oil
feed pipe please have the engine inspected and let us know if there are any issues.
The inspection can be carried out by removing the rocker covers and checking
the rockers for slop or for any yellow residue. We are also interested
to hear if everything is fine, so please tell us how many engines you have checked
and what the inspections found.
While the investigation is happening these bushes must not be fitted to any engine
with an external oil feed pipe. If you need any of the old type bushes in
a hurry in the meantime please let us know.
Thank you,
Doug Smith
Engineer, Jabiru Aircraft
The pics attached show the new material (I admit to looking at my calendar to see
if it was April 1st). I know I'm 'old-school', but what's wrong with sintered
bronze (oilite) for this job? Swiss cheese, anyone?
C'mon Lynn, I bet you have a comment.....!
Cheers, Andy
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=318059#318059
Attachments:
http://forums.matronics.com//files/jab_new_rocker_bushing_2_134.jpg
http://forums.matronics.com//files/jab_new_rocker_bushing_1_637.jpg
Message 3
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| Subject: | Re: New rocker bushing material - possible issue |
..."no one buying a new engine will not be getting rockers fitted with the
new material."
Huh?
Rick Girard
On Wed, Nov 3, 2010 at 2:28 PM, Pete Krotje <pete@usjabiru.com> wrote:
>
>
> Let's be clear here - - these rocker bushes have only been retrofitted to
> some existing engines and no one buying a new engine will not be getting
> rockers fitted with the new material.
>
> Pete
>
> -----Original Message-----
> From: owner-jabiruengine-list-server@matronics.com [mailto:
> owner-jabiruengine-list-server@matronics.com] On Behalf Of andysilvester
> Sent: Wednesday, November 03, 2010 1:49 PM
> To: jabiruengine-list@matronics.com
> Subject: JabiruEngine-List: New rocker bushing material - possible issue
>
> andy@cimaer.com.br>
>
> Received from Jabiru recently, this is news that they changed the bearing
> material for the rockers. However, some are reporting issues when this ne
w
> material is used on the 'old' rocker lubrication system. Here's it is, fo
r
> general information and awareness (if in doubt, call your Jabiru dealer):
>
> Dear Jabiru Dealers and Maintenance Organisations,
> We have recently introduced a new type of valve rocker bush material, as
> shown in the attached photos. This material has been used in South Afric
a
> for some time with no problems but we have found several cases in Austral
ia
> where the yellow bush material degraded very quickly in service =93
within
> the first hours of operation. All the issues so far have been in hydraul
ic
> lifter type engines using the old rocker lubrication system =93 i.e
.
> hydraulic lifter engines with an external oil feed pipe from the crankcas
e
> to the cylinder head and solid lifter types.
> Engines where the oil feed for the rockers is carried by hollow pushrods
> are not affected.
> There are no production engines of this configuration so at the moment th
is
> alert does not affect new production engines.
> If you have fitted any of these type bushes to any engine with an externa
l
> oil feed pipe please have the engine inspected and let us know if there a
re
> any issues. The inspection can be carried out by removing the rocker cov
ers
> and checking the rockers for slop or for any yellow residue. We are also
> interested to hear if everything is fine, so please tell us how many engi
nes
> you have checked and what the inspections found.
> While the investigation is happening these bushes must not be fitted to a
ny
> engine with an external oil feed pipe. If you need any of the old type
> bushes in a hurry in the meantime please let us know.
> Thank you,
> Doug Smith
> Engineer, Jabiru Aircraft
>
> The pics attached show the new material (I admit to looking at my calenda
r
> to see if it was April 1st). I know I'm 'old-school', but what's wrong wi
th
> sintered bronze (oilite) for this job? Swiss cheese, anyone?
>
> C'mon Lynn, I bet you have a comment.....!
>
> Cheers, Andy
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=318059#318059
>
>
> Attachments:
>
> http://forums.matronics.com//files/jab_new_rocker_bushing_2_134.jpg
> http://forums.matronics.com//files/jab_new_rocker_bushing_1_637.jpg
>
>
===========
===========
===========
===========
>
>
--
Zulu Delta
Kolb Mk IIIC
582 Gray head
4.00 C gearbox
3 blade WD
Thanks, Homer GBYM
It is not bigotry to be certain we are right; but it is bigotry to be unabl
e
to imagine how we might possibly have gone wrong.
- G.K. Chesterton
Message 4
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| Subject: | Re: New rocker bushing material - possible issue |
That's American for "all new engines have the new material"
--- On Thu, 4/11/10, Richard Girard <aslsa.rng@gmail.com> wrote:
> From: Richard Girard <aslsa.rng@gmail.com>
> Subject: Re: JabiruEngine-List: New rocker bushing material - possible issue
> To: jabiruengine-list@matronics.com
> Date: Thursday, 4, November, 2010, 10:04 AM
> ..."no one
> buying a new engine will not be getting rockers fitted with
> the new material."
> Huh?
> Rick Girard
>
> On Wed, Nov 3, 2010 at
> 2:28 PM, Pete Krotje <pete@usjabiru.com>
> wrote:
>
> Krotje" <pete@usjabiru.com>
>
>
>
> Let's be clear here - - these rocker bushes have only
> been retrofitted to some existing engines and no one buying
> a new engine will not be getting rockers fitted with the new
> material.
>
>
>
> Pete
>
>
>
> -----Original Message-----
>
> From: owner-jabiruengine-list-server@matronics.com
> [mailto:owner-jabiruengine-list-server@matronics.com]
> On Behalf Of andysilvester
>
>
> Sent: Wednesday, November 03, 2010 1:49 PM
>
> To: jabiruengine-list@matronics.com
>
> Subject: JabiruEngine-List: New rocker bushing material -
> possible issue
>
>
>
> "andysilvester" <andy@cimaer.com.br>
>
>
>
> Received from Jabiru recently, this is news that they
> changed the bearing material for the rockers. However, some
> are reporting issues when this new material is used on the
> 'old' rocker lubrication system. Here's it is,
> for general information and awareness (if in doubt, call
> your Jabiru dealer):
>
>
>
>
> Dear Jabiru Dealers and Maintenance Organisations,
>
> We have recently introduced a new type of valve rocker bush
> material, as shown in the attached photos. This material
> has been used in South Africa for some time with no problems
> but we have found several cases in Australia where the
> yellow bush material degraded very quickly in service
> within the first hours of operation. All the
> issues so far have been in hydraulic lifter type engines
> using the old rocker lubrication system i.e.
> hydraulic lifter engines with an external oil feed pipe from
> the crankcase to the cylinder head and solid lifter types.
>
>
> Engines where the oil feed for the rockers is carried by
> hollow pushrods are not affected.
>
> There are no production engines of this configuration so at
> the moment this alert does not affect new production
> engines.
>
> If you have fitted any of these type bushes to any engine
> with an external oil feed pipe please have the engine
> inspected and let us know if there are any issues. The
> inspection can be carried out by removing the rocker covers
> and checking the rockers for slop or for any yellow residue.
> We are also interested to hear if everything is fine, so
> please tell us how many engines you have checked and what
> the inspections found.
>
>
> While the investigation is happening these bushes must not
> be fitted to any engine with an external oil feed pipe. If
> you need any of the old type bushes in a hurry in the
> meantime please let us know.
>
> Thank you,
>
> Doug Smith
>
> Engineer, Jabiru Aircraft
>
>
>
> The pics attached show the new material (I admit to looking
> at my calendar to see if it was April 1st). I know I'm
> 'old-school', but what's wrong with sintered
> bronze (oilite) for this job? Swiss cheese, anyone?
>
>
>
>
> C'mon Lynn, I bet you have a comment.....!
>
>
>
> Cheers, Andy
>
>
>
>
>
>
>
>
>
> Read this topic online here:
>
>
>
> http://forums.matronics.com/viewtopic.php?p=318059#318059
>
>
>
>
>
>
>
>
>
> Attachments:
>
>
>
> http://forums.matronics.com//files/jab_new_rocker_bushing_2_134.jpg
>
> http://forums.matronics.com//files/jab_new_rocker_bushing_1_637.jpg
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
> ==========
>
> ="_blank">www.aeroelectric.com
>
> ooks.com"
> target="_blank">www.buildersbooks.com
>
> et="_blank">www.homebuilthelp.com
>
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>
> le, List Admin.
>
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>
> -List"
> target="_blank">http://www.matronics.com/Navigator?JabiruEngine-List
>
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>
> ==========
>
>
>
>
>
>
>
>
>
>
> --
> Zulu DeltaKolb Mk IIIC582 Gray
> head4.00 C gearbox3 blade
> WDThanks, Homer GBYM
> It is not bigotry to be certain
> we are right; but it is bigotry to be unable to imagine how
> we might possibly have gone wrong.
> -G.K.
> Chesterton
>
>
>
>
>
>
> provided
>
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