Yankneck696

WHenever jumping or being jumped, I do all of the connections. Ed

I'll clarify. THe 350 Leese Neville was $700 cost to the shop brand new. Sold for around $1200. Ed

Heck, back in the 80s, a Leese Neville 350 amp alternator was over $700. It was the industry standard for fire engines & other heavy electricly loaded vehicles. My former boss buys them SHIPPED from China for $270. What does that tell you? Ed

Also, every diode (Or bridge rectifier) drops voltage 1.3 or 1.6 volts. Now, how would you connect the ground casing to the casing of the alternator, then back to the negative part of the wiring system, as the casing is grounded? I understand that you are trying to find a way to work around the issue & applaud your tenacity. I have been a Ham radio operator, electrician, designed & built solder reflow machines that were powered by RF energy. My electronic days started with tubes. My honest guess about the alternator issues is that: 1. the packaging requirements do not allow enough heat out. 2. Cheap rebuilds all have Cheap Chinese diode/rectifier packs. 3. our truck's wiring system was marginal at best when designed (Bean counters) & after 15 or so years are deteriorated, due to heat, corrosion & of course vibration. I worked in the auto electric field for a while & usedd to rebuild alternators & starters for the most reputable shop in the Boston area. We used the best of parts & ran every alternator through a full load test, along with hooking them to an oscilliscope to check for AC leakage & to make sure that the brushes were broken in. I called the owner in January & was talking to him about the issue & he stated "Eddie, I just cannot afford to build an alternator with the right parts anymore. Rectifier packs of any quality cost more than 1/2 of what I can buy a Chinese alternator for. So, now, I am just a retail outlet, except for SOME heavy equipment starters. Otherwise, I would have to close the shop down". For our truck, specificly, he purchases the alternator for $34 & sells them for $88. The good american rectifier pack costs $28 by the 100. The brushes, media blasting of the case, machining of the commutator s, testing of windings, brushes & man hours would put him right out of the market. Keep shoping at Walmart..... Ed

Again, a quality rebuilt alternator will do just fine. Ed

THe filter would probably weigh as much as the alternator to handle the amperage. I have designed many RF filters & I do know them well. It would be easier to just have a good quality rebuild. And, as Michael stated, 1 diode will not wirk. Even a bridge rectifier needs filtering afterwards. Ed

I would be willing to bet that what they are calling a transistor is actually a MOSFET. Ed

A bit about thermal conductivity... http://www.matbase.com/material-categories/other-materials/fuels/material-properties-of-diesel.html#properties shows the thermal conductivity of diesel fuel at 0.15 W/m.K Compare that to air, water & aluminum on this chart... http://www.engineeringtoolbox.com/thermal-conductivity-d_429.html Just something to ponder..... Ed

Some of hte high end multimeters come with a temperature probe. Might help. Ed

By the end of the month, I will be testing a system to cool the PSG. I will compare internal fuel temps to external laser temps. Michael, I didn't know you had another pump. I have almost everything I need for the next experiment, except an ECM & pump. Ed

With the cable subject brought up, sometimes, they fray internally & can hang up. I doubt that is the issue, but just an idea. Ed

My understanding is that you are not supposed to have any slack at all on the TV cable. Try adjusting it to moving right with the throttle bell crank. Ed

I am wondering if there might be a different adjustment that goes with the 4.2 lever. Never heard of one, but it's worth investigating. Ed

It is the computer on top of the injection pump that takes communicates back & forth with the ECM to decide fuel delivery quantity & timing. Ed

I wish I had the solder reflow machine I helped build in the 80s. It used 2.9 KW of RF energy at 27.2Mhz to melt the solder. I would be able to reflow the entire board. That would only help if it could be disconnected from the ribbon cable, though, as the Hall sensor must stay in place for proper alignment. Ed

3 cyl (Factory) starts normal & ramps up to 1200 RPMs. Then it switches to 3 cyl. I seriously doubt the Cummins was running backwards. Ed

I have hears of the 2 1/2 tons & Detroits running backwards, also some ancient Volvo dieseld (Hand crank start), but never a Cummins. Sure it wasn't just the AC powered fan possibly creating noise or leaking AC to the system?

I would say a Revmax trans, as you can call & talk directly to Frank, he makes high grade mild to wild, truly understands the torque convertors & transmissions & recently had an issue with some of the parts supplied to him & admitted it publicly/informed the customerd that got them to return them. He will build it to your present & future needs. Ed

OK, I'll have to dig, but I sis find a different chart a while back, whereas the no lead solder goes down to as far as 110*F, depending on the alloy. The Cummins ECM is NOT produced by an autto manufacturer and has quality solder. It is supplied to Dodge as a unit, therefore Dodge (Auto manufacturer) did not produce it & it may get a pass on the no lead. Bosch & Cummins may also just use different alloys of solder.. Ed

The EPA has mandated lead free solder for quite some time. Their reasoning is that the electronics get pulverized & smelted along with the rest of the car upon recycling. Problem is that all electronic modules are removed & stocked on shelves before crushing. I workes auto salvage for 5 years & pulled tens of thousands of electronic modules & inventoried them. We made more money on them as mail order products than engines, transmissions, alternators & power steering pumps combined. Rancherman, doing your temp measurements & keeping track of them will save you quite a bit in repairs, because you will see an upwards trend before breakage. Put them in a spreadsheet to keep track. This is a normal practice in commercial boats/fishing. Ed

Your computer is produced using lead based solder. http://www.rfcafe.com/references/electrical/solder.htm The last line is the most important: Lead-free solder has a higher Young's modulus than lead-based solder, making it more susceptible when deforming applied. When the PCB on which the electronic components are mounted is subject to bending stress due to warping, the solder joint deteriorates and fractures can appear. This effect is called solder cracking. [12] Another fault is Kirkendall voids which are microscopic cavities in solder. When two different types of metal that are in contact are heated, dispersion occurs (see also Kirkendall effect). Repeated thermal cycling cause the formation of voids which tends to cause solder cracks. Lead-free solder can cause short life cycles of products, as well as planned obsolescence Ed

Noise from the alternator (Wether diodes or brushes) increases with RPMs. In your case, the RPMs dropped when you upshifted. I still think it's a heat/PSG issue. Ed

If done properly, there will be no noise filter needed at all.Twisted shielded pairs for each unit connected should in all the laws of emf, should negate any noise. Ed

I have never heard of a seized rotor on a VP44. Ed

I guess it's time for me to get a core VP.... Ed