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PointedThree :  Vans, Trucks, SUVs and Other Forums : G-Class : Preventative Maintenance of SAM?

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Preventative Maintenance of SAM?
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Posted 1/10/2020 8:54 PM
G4me
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Date registered: Jan 2012
Location: Honolulu, HI
Vehicle(s): 2002 G500, FJZ80 LandCruiser
Posts: 111
100
Preventative Maintenance of SAM?

When I experienced my instrument cluster electrical problem a number replied that it was likely due to corrosion in the front SAM. Like it is a common occurrence. Has any thought been given to preventative maintenance by using a corrosion block similar to those used in marine industry. Something like Boeshield or TS-11? Seems a couple hours unplugging connections and spraying with corrosion inhibitor would be a worthwhile annual maintenance item. Thoughts? Is there any downside to treating connections on SAM with one of these products?

Thanks
G4me
#241414
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Author
Posted 1/15/2020 9:29 AM
Roverrange
Member


Date registered: Nov 2019
Location: North Florida
Vehicle(s): 2005 G500
Posts: 19

Re: Preventative Maintenance of SAM?

This sounds like it makes a lot of sense. I don’t know if there is a downside to spraying it but replacing a SAM is not cheap. Worth the maintenance up front. I would also look into how any moisture is getting to it in the first place.
#241423 - in reply to #241414
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Author
Posted 1/19/2020 3:56 PM
Floobydust
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Date registered: Mar 2014
Location: Massachusetts, USA
Vehicle(s): 1995 E320 Cabrio, 2003 G500, 2000 SL500, 1980 TR8
Posts: 284
100
RE: Preventative Maintenance of SAM?

I think one of the big issues with corrosion and the front SAM is that water leaks/seeps in above it via the windshield wiper mechanism. I think the seal goes bad or comes loose where the wiper pivots.
#241433 - in reply to #241414
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Author
Posted 1/19/2020 5:14 PM
G4me
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Date registered: Jan 2012
Location: Honolulu, HI
Vehicle(s): 2002 G500, FJZ80 LandCruiser
Posts: 111
100
RE: Preventative Maintenance of SAM?

We have had steady rain for a couple of days so donned my rain coat and went out to check front SAM for moisture. Bone dry. Agree with Flooby treat the cause not the symptom. Now I will be looking at wiper shaft seal replacement as preventative maintenance. Although in my case my instrument cluster failed had nothing to do with SAM so this will be an effort to prevent electrical gremlins in future as a corroded SAM seems common and to be cause of most of them.
#241434 - in reply to #241414
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Posted 1/19/2020 10:23 PM
Floobydust
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Date registered: Mar 2014
Location: Massachusetts, USA
Vehicle(s): 1995 E320 Cabrio, 2003 G500, 2000 SL500, 1980 TR8
Posts: 284
100
RE: Preventative Maintenance of SAM?

Have you received your instrument cluster back from repair yet? I would be curious what the diagnosis/failure was for it.
#241437 - in reply to #241434
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Posted 1/20/2020 7:50 PM
G4me
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Date registered: Jan 2012
Location: Honolulu, HI
Vehicle(s): 2002 G500, FJZ80 LandCruiser
Posts: 111
100
RE: Preventative Maintenance of SAM?

I did receive it back in perfect working order. I installed it on Saturday but have not had chance to speak with shop about exactly what was wrong with it yet.

Since I have not been able to drive it for awhile I took it out for a drive yesterday and the window regulator went belly up. Broken white plastic cable holder. Birds nest of cable in motor spool area. Argh.
#241441 - in reply to #241414
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Posted 1/21/2020 4:06 PM
Floobydust
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Date registered: Mar 2014
Location: Massachusetts, USA
Vehicle(s): 1995 E320 Cabrio, 2003 G500, 2000 SL500, 1980 TR8
Posts: 284
100
RE: Preventative Maintenance of SAM?

Glad the instrument panel is back and working. Yeah, the windows regulators on the earlier Gs are notorious for that. And unfortunately, the old style is not available so you have to use the new style which involves modifying the door. On one of the various G sites there is a great DIY on how to do it.
#241444 - in reply to #241441
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Posted 1/21/2020 11:02 PM
G4me
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Date registered: Jan 2012
Location: Honolulu, HI
Vehicle(s): 2002 G500, FJZ80 LandCruiser
Posts: 111
100
RE: Preventative Maintenance of SAM now regulator

This is the newer style regulator that failed. I am actually interested in the DIY improvements using better pulley wheel and bike parts. The more metal the better I guess. I have not found the posting detailing modifying front regulator.
#241452 - in reply to #241414
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Posted 1/22/2020 9:57 PM
Floobydust
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Date registered: Mar 2014
Location: Massachusetts, USA
Vehicle(s): 1995 E320 Cabrio, 2003 G500, 2000 SL500, 1980 TR8
Posts: 284
100
RE: Preventative Maintenance of SAM now regulator

Interesting. I have not head much about the newer ones failing. Supposedly they have beefier pulleys and a more balanced force on the glass which is supposed to make them last longer.

I tried replacing the plastic pulleys with aluminum ones, but it is a lot more difficult than it looks. If found the correct size pulleys (aluminum screen door roller wheels) but mounting them to the mechanism so that the mounts still cleared the mechanism proved very difficult (never got it to work quite right). I just decided to update to the new design, buy the cheap Chinese ones on Ebay, modify the door as needed, and then replace if/when needed.

FYI: https://www.benzworld.org/threads/photo-diy-g500-driver-side-front-w...

https://drive.google.com/folderview?id=0B7k-bx3mPyMwTFhGcXc4TlpmWmM&...

#241455 - in reply to #241452
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