The Alternator alternative!!
Hi All, I recently had an alternator adventure that I thought would be useful to share with you all as I was able to ascertain some very interesting figures and insight into the workings of the 2.7ltr diesel motors, they may also apply to the 3.0ltr and if they don’t directly I would assume they would be very similar.
As posted in another thread, which I don’t want to hijack, I have had a battery warning light come on which went away after driving 300kms. It seemed this was primarily due to the car sitting for so long whilst I was away working and only getting a few short trips during that time. I did get the battery and alternator checked after driving the 1500 km’s home and was assured everything was working fine. Unfortunately, yet again, the information from the professionals proved to be incorrect. 950k’s into another trip and the dash lit up as the vehicle went into a form of electrical limp mode. It soon became apparent that the battery was draining and fast. It was approximately 2km’s before I could find a safe location to pull over. The 90 amp/hr primary battery was immediately tested with a volt meter and registered 10.1 volts. Assuming that it was the battery that had failed, I simply switched out the primary battery for #4 battery {yes I carry 4 batteries when long distance traveling}. The #4 battery is a 66 amp/hr AGM, this is the first of the interesting numbers. Believing it was the battery and rather stupidly not bothering to check the voltage after start up, I then proceeded to drive a further 200km’s with everything still running including the stereo and A/C in 30+ degree temperatures. The instant the dash lit up again I realized the error of my ways, it’s a pity that anger energy can’t be used to recharge a battery. By this time I was approximately 75k’s north of the Manilya roadhouse. When checked with a voltmeter the battery read 10.4 volts. At this time I was planning to simply switch to battery #3 unfortunately the terminals were on the opposite way round and the positive lead wouldn’t reach, this was also the case with battery #2, an optima yellow top. At this point the sweat beads were rapidly beginning to appear. I had considered utilizing the heavy jumper leads and connecting the positive terminals of the #2 to the primary battery as a possible power supply however I thought I would just give the key a turn and see how far I could get before complete shutdown. In all honesty I didn’t think it would even start, yet to my surprise it not only started but, with lots of dash warning lights on, I was able to drive the 75k’s back to Manilya. With a borrowed battery charger and an overnight charge the #2 66amp/hr AGM battery read 12.2 volts, with the fuses pulled on the A/C and infotainment systems, this was enough charge to drive the further 150k’s into Carnarvon. After many phone calls and much consultation I made the decision to drive back to Perth. During the stay in Carnarvon the #1 90amp/hr battery was put back in it’s rightful place and both #1 and #4 batteries were put on charge for several hours with a plan of leaving enough daylight time to be able to travel the 250k’s to the billabong roadhouse. At time of departure from Carnarvon the Primary 90 amp battery read 12.3 volts and was the sole source of power, on arrival at the Billabong and having had no warning lights appear throughout the journey, the battery registered 11.45volts. With advice from Tim AKA drivesafe, I had purchased a 15amp battery charger in Carnarvon and with all batteries in there original allocated positions I was able to charge all 4 at the same time through the traxide multiple battery system. During this overnight stop the positive cable that connects batteries 3 and 4 was re-rigged to be able to connect the positive terminals of batteries 1 and 2 allowing the power to be drawn from the first 3 batteries with the 4th being taken off line as a contingency plan. On completion of the 13hrs of charging all batteries were fully charged and reading 12.97volts. Now much to the surprise of several people I was able to drive the entire 640k’s back to Perth without another recharge and furthermore upon arrival in Perth registered 12.32 volts still in the first 3 batteries with the fourth battery not required at all. Bearing in mind that there was 1 x 90 amp/hr and 2 x 66 amp/hr batteries online.
Following advice from Tim, the amperage draw was measured prior to having the alternator replaced whilst the fuses were still removed for the A/C and infotainment unit. The vehicle may have been in a form of electrical protection mode still, smarter people than me may be able to confirm that. The amperage draw measured 30 amps on start up and almost instantly drops back to 6 amps whilst the motor is at idle. For comparison the same readings were taken after the alternator and all fuses were replaced. With the A/C just turned off but the stereo on, the vehicle draws 40 amps on start up and drops back to 27 amps at idle add the A/C and it increases to 47 amps and then turn the headlights on high beam and include the spotlights and it increase again to 75amps.
I have posted all the pertinent details in a thread on the main D3/4 forum board. If your vehicle is approaching the 120 000 k mark I would suggest that it may beneficial for you to take the time to read the other related post.
Cheers all
Just where will a Disco 3 go?
We lived at Alice Springs for eight months and during that time I worked for the local LR Dealer. One weekend the boss decided that it would be good to take a few Landies and go for an explore out in the West MacDonnell Ranges. One thing I had learnt since being in the Alice was that if you want to see the really good bits, you go with the locals. So, we signed up immediately.
We all met at the appointed time and place and headed west to the grave of Flynn of the Outback. From there we took a track north toward the ranges. The tracks we took weren't overly challenging for the Series II that the boss was driving (complete with bricks and a crowbar in the back to hold the wheels on the ground), an early V8 petrol Rangie, a 130 and of course, our D3. We stopped at an unofficial lookout and brewed a cuppa while others took photos.
From there we continued north and came across a fence line blocking our path. It was clear that this fence wasn't there the last time the locals came this way and it had them all scratching their noodles trying to figure out how to get to the other side. Another cuppa was brewed and it was decided to lift the star pickets out of the ground, lay the fence down, drive over it and then stand the fence up again.
Once clear of the obstacle we meandered along tracks that became increasingly rough and called for the suspension of the D3 to be raised for clearance. One particular jump-up, with a very nasty lump right at its summit, almost caused the 130 to tip over! We followed and I confess to not using the terrain response control and stalled the vehicle at the lump at the summit. Once selected to rock-crawl the vehicle sauntered up the rest of the way.
Minutes later the procession came to a halt. The track had degraded to the point where a huge lump of rock jutted up from the centre of the wheel marks and the terrain on either side was impassable. Remember the crowbar? Well, the boss drags out the crowbar and starts slamming it against the rocky outcrop. Soon enough the rock was splintering off and the once impassable track was tamed. I was gobsmacked. 4WDers everywhere else carry a shovel. In the Red Centre you carry a crowbar. No-one seemed concerned at the destruction of the rock.
The track got progressively tighter, rougher and steeper but eventually opened up at the top to a large clearing right on top of the MacDonnel Range. The views were breathtaking and well worth the effort. It had taken almost two hours to travel about 10 Kilometres. Another cuppa and a heap of photos later, we headed back the way we came. Within minutes of heading off we came across a white marker post with a blue triangle on it that we hadn't seen on the way in. We were pondering its significance when we came across another, and then another.
All of a sudden it dawned on us that these were markers for the walk-trail that runs along the entire length of the MacDonnell Ranges. So then we knew....a Disco can go anywhere you can walk!
Once through the fence we took a different route back which included a drop-off so deep that as the Rangie went over the crest of it, we could see the entire underbody while waiting behind in the Disco. We also had a few dramas when the 130 slipped off the side of the track and we had to "build" a new road for it to drive back over to get onto the track again.
We arrived back at the Alice having taken six hours to travel a little over 20 Kilometres and drink four cups of tea. It was time for a beer...