Rare SGI Silicon Graphics Non-Impact Purple Indigo 2

This was part of the local haul that I re-furbished and sold to pay for my Onyx 2. It’s an interesting machine as it’s a purple non-Impact machine. Meaning it doesn’t support the next-generation Impact video cards as it lacks the supplemental power connectors. Generally, teal Impacts don’t support Impact, purple do.

So this 200MHz machine must have been built in between model changes.

Rare SGI Silicon Graphics Non-Impact Purple Indigo 2 CDROM

Rare SGI Silicon Graphics Non-Impact Purple Indigo 2 Close Up

Rare SGI Silicon Graphics Non-Impact Purple Indigo 2 CPU

Rare SGI Silicon Graphics Non-Impact Purple Indigo 2 Door Open

Rare SGI Silicon Graphics Non-Impact Purple Indigo 2 Drive

Rare SGI Silicon Graphics Non-Impact Purple Indigo 2 Ethernet

Rare SGI Silicon Graphics Non-Impact Purple Indigo 2 Expansion

Rare SGI Silicon Graphics Non-Impact Purple Indigo 2 Front Closed

Rare SGI Silicon Graphics Non-Impact Purple Indigo 2 Front

Rare SGI Silicon Graphics Non-Impact Purple Indigo 2 HINV

Rare SGI Silicon Graphics Non-Impact Purple Indigo 2 Lightwave

Rare SGI Silicon Graphics Non-Impact Purple Indigo 2 Top

Rare SGI Silicon Graphics Non-Impact Purple Indigo 2

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R129 SL600 Main Engine Harness Rebuild

My primary reference for this job was from: MB SL600 7,2 Väth

As a DIY project this is and 8/10, and not really expensive. Maybe $50 in wire and $60 is parts (that you’ll break during disassembly.) I did buy some good tools to make the job easier including a premium soldering iron, shop lights, and multimeters. It took about 30 hours. The next time you could probably get it down to 20. A replacement is $3,000 so rebuilding it yourself is a reasonable option. What tips the scale in favor of DIY is that you must also rebuild the (2) MAF & (2) Throttle Body cable sets too and either no shop or dealer will do this or you’re replacing un-obtainable throttle bodies. In short, DIY is the only option. And if you’re DIY’ing those harnesses, may as well do the main harness too.

Here’s the harness removed from the car:

R129 SL600 Old Main Harness

Watch the removal video here:

MB SL600 7,2 Väth has a great schematic that was referenced constantly during the rebuild. I updated it a bit for a broader audience and modified some notes that were confusing. Feel free to email me changes you feel are necessary:

M120 Main Engine Harness Schematics

After considering the tasks at hand for quite a while I settled on the following process:

  • Chop off the termination block.
  • Measure and label each wire from where we chopped the wire to the connector, then add four inches for the travel from the cut to the termination conductor.
  • Don’t measure the ground wires from the connectors to the shared ground wire. We’ll do that later.
  • Note the shared ground wires 16 & 17 are heavier gauge.
  • Cut the wires at the termination block about an inch high off the top of the block.
  • Solder each wire to the termination block.
  • Cover with shrink wrap and heat.
  • Replace the top of the termination block.
  • Cover wires with some sort of braided sheath to the firewall grommet.
  • Replace firewall grommet.
  • Cover wires from firewall grommet to where the first set of fuel injector leads branch off.
  • Place the new harness over the old, sort the wires to their destinations, and zip tie in place using small ties.
  • Measure shared ground wires from connector to shared ground wires. Note that in the original harness some travel down the harness and double back for easy connection to the shared ground. Zip tie in place.
  • Swap all the fuel injector connectors and wiring covers and boots. Be sure to swap the covers and boots before soldering on the conductors.
  • Label the fuel injector cylinder on the new wire. This really helps keeping things straight especially at 5,6,11,12 where they all branch from the same point.
  • Fuel injectors are now done.
  • Carefully cut open the round connectors. (See Below)
  • De-solder conductors.
  • Swap wire covers.
  • Solder conductors to new wires.
  • Epoxy round connectors together.
  • Break open rectangular connectors and de-solder conductors.
  • Swap wire covers.
  • Replace rectangular connectors with new from the dealer. They’re about $2.00 each.
  • Carefully swap the thermometer connector.
  • Verify conductivity of each wire from conductor to conductor and to grounds.
  • Reinstall onto the black harness tray from the car.
  • Reinstall into the car.
  • Fire it up!

Round Connectors
I’ve seen a few techniques on opening these and the truth is they’re built in such a way as to foil attempts to cleanly open. You see, they’re connected on both these surfaces:

R129 SL600 Round Connector Two Seams

So the only way to open is to cut along both sides, then brake around the round edge. When cutting the sides, note that you’re cutting both the outer cover AND a little interior part that holds the wires in place (the dremmel welded them together but the video clearly shows the two pieces):

R129 SL600 Round Connector Two Parts

Both my breaks were rough, but a little epoxy and careful matching afterwards I was able to get them back together. You’ll probably get epoxy inside the outer channel (that the car’s connector slides into) that I dremmeled out with the tiny mill like attachment. It’s a hard, messy job that I spent most of my time with.

The top of the connector will have one conductor marked with its pin number. That pin matches the pin number on the car’s connector.

R129 SL600 Round Connector Pins

Right off the car:

R129 SL600 Round Connector

Just before cutting:

R129 SL600 Round Connector Ready for Cutting

Conductors soldered to new wires. Note pins 3 & 4 are connected:

R129 SL600 Re-Soldered

Cutting open the round connector:

Main Engine Terminal

A video documenting what you’ll be doing:

Bottom:

R129 SL600 Main Harness Terminal Bottom (1)  Right:

R129 SL600 Main Harness Terminal Side (1)

Left:

R129 SL600 Main Harness Terminal Side (2)

Top:

R129 SL600 Main Harness Terminal Top

Here’s the completed harness in the car:

R129 SL600 New Harness installed (1) R129 SL600 New Harness Installed (2)

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SGI Silicon Graphics Onyx2 as I Picked It Up

IMG_4736

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R129 SL600 Fuel Injector Electrical Connector Replacement

The fuel injector connectors were in really rough shape. The insulation just disintegrates when touched:R129 SL600 Fuel Injector Connectors Before (1)

They were fairly easy to rebuild. The connector’s rubber boot slides off easily, then the tricky part: Get a small paper clip, unwrap it, then bend in half so the ends are next to each other. Then stick the clip in the two holes next to the conductor pinching the conductors locking tabs together.

connector

The conductor should slide right out.
We then remove the rubber boot trying to preserve and reuse it. I used the pick in the middle:

tools

…to carefully pry open the tabs holding the boot in place. There are 24 conductors and not all will slide out easily nor will you be able to save the boots. I bought six replacement conductors (they come with wires attached) and two replacement injector connectors (the black plastic part) as rather than sliding out, the tabs on the conductor ripped apart the connector. Total bill was about $60 from the local MB dealer.

Push back the blue conductor boot and desolder the conductor.

After measuring your wires, replace the connector boot and its wrap and install the conductor boots. Solder the wire to the conductor. When cool slide the conductor boot into place. I used needle nose pliers to crimp the tabs back in place.

Repeat 12 times. Here’s the finished product:

R129 SL600 Fuel Injector Connectors After

There’s a lot of soldering involved so I’d get the best iron I could afford. I got this highly rated one.

Here’s some of the other tools I used:

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Mb Star C4 for R129 SL600

Another tool required for the maintenance of my SL600 is the computer cables, mulitplexer, and software to read engine fault codes and control/test engine components. Without it the SL600 will be scraped. The option I chose was this aftermarket part.

It comes with all the cable necessary for working on the latest 2016 cars to my ’94. The cables alone are worth the purchase price.

It did work the first time but after a dozen uses I see that I’m not communicating with the soft top, and don’t have visibility into the fuel injection system. Some posts on the Internet indicate a software problem so I’ll pursue that shortly.

Some still shots:

Mb Star C4 1 Mb Star C4 2 Mb Star C4 3 Mb Star C4 4 Mb Star C4 5 Mb Star C4 6 Mb Star C4 7 Mb Star C4 8

Video:

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Quick Jack 5000 BL-5000SLX Box Opening and Testing with R129 SL600

Taking on the SL600 required some tools. The first being a lift that quickly and safely lifts the whole car so I can work under it without having to jack up my life insurance rates. The SL600 is a special case in that to work on the suspension (something I’d be doing regularly given its hydraulic ADS) requires all four wheels off the ground. The Quick Jack filled the niche between a permanent and expensive two post lift and miserable and dangerous floor jacks and stands.

Overall, it appears to be a good product but it’s clear they’re trying to ship orders and improve the product at a frenetic pace, simultaneously. Lots of parts and manual discrepancies exist in the final product but in my case everything worked the first time. I’d buy again.

Here’s some still shots:

QuickJack1 QuickJack2 QuickJack3 QuickJack4 QuickJack5 QuickJack6 QuickJack7 QuickJack8 QuickJack9 QuickJack10 QuickJack12

…and a video of opening the box:

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R129 SL600 Bumper Problems

We acquired the Mercedes with the following bumper problem:R129 SL600 Broken Bumper (1) R129 SL600 Broken Bumper (2) R129 SL600 Broken Bumper (3)

I wasn’t going to drive it until I got a new bumper but came up with this quick fix using zip ties:

R129 SL600 Fixed Bumper (1) R129 SL600 Fixed Bumper (2) R129 SL600 Fixed Bumper (3)

 
This will last another year so we can get more urgent maintenance tasks done.

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R129 SL600 Main Engine Harness Removal: More High Resolution Pictures

DSC_0037 DSC_0038 DSC_0040

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R129 SL600 Main Engine Harness Damage Pictures

R129 SL600 Main Engine Harness Damage (1) R129 SL600 Main Engine Harness Damage (2) R129 SL600 Main Engine Harness Damage (3) R129 SL600 Main Engine Harness Damage (4) R129 SL600 Main Engine Harness Damage (5)

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SGI Silicon Graphics O2 R10000 270MHz

An O2 I got cheap, restored and sold to pay for my Onyx2:

SGI Silicon Graphics O2 R10000 270MHz Desktop SGI Silicon Graphics O2 R10000 270MHz Firefox Nekochan SGI Silicon Graphics O2 R10000 270MHz HINV SGI Silicon Graphics O2 R10000 270MHz Keyboard Monitor SGI Silicon Graphics O2 R10000 270MHz Left Side SGI Silicon Graphics O2 R10000 270MHz Lightwave SGI Silicon Graphics O2 R10000 270MHz Maya (2) SGI Silicon Graphics O2 R10000 270MHz Mother Board SGI Silicon Graphics O2 R10000 270MHz Right Side SGI Silicon Graphics O2 R10000 270MHz SoftImage SGI Silicon Graphics O2 R10000 270MHz Top

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