Users browsing this forum: Toggle navigation Porsche Registry. It is currently Fri Dec 01, 7: Forum rules Please click here to view the forum rules. Fri Dec 04, 3: These are some of my thoughts regarding generators! Until the end of these vehicles were equipped with 6 volt electrical systems.
From the beginning through Syystem Porsche also equipped vehicls with generators of the 6 and 12 volt variey similar to the VW. Similairly if the small two coil regulator were defective houndreds of millions of those would have caused problems which would have resulted in an immediate design.
My conclusing is Eleftrical generator brushes were adequate and regulator design was adequate and very serviceable. Amount of current watts or amps to run your car.
Similairly the person that rebuilds our 6 volt generators believes VW Lt 40-55 Mk1 1975-1996 Bosch S3 Battery 77Ah Electrical System Replace Part the generator can survive in cooler climates on long drives as long as it does not have to produce more than watts. The remaining VW Lt 40-55 Mk1 1975-1996 Bosch S3 Battery 77Ah Electrical System Replace Part amps cannot sustain the charging system nor the operation of the engine and gauges.
So setting the 6 volt regulator for 27 amps will result in a dead battery without using the radio, wipers, turn signals VW Lt 40-55 Mk1 1975-1996 Bosch S3 Battery 77Ah Electrical System Replace Part brakes. The regulator should be set 7. For 12 volt it is On the and Porsche 195-1996 installed a block plate between the air blower and the end of the end of the generator this cut off the air supply and increaded the temprature in the generator as especially under load.
I was told this was employed to control noise from the air passing through the generator. If you are living in the VW Lt 40-55 Mk1 1975-1996 Bosch S3 Battery 77Ah Electrical System Replace Part states you can probably continue using the plate.
In the Southern states it should be removed. Thus giving your generator cooling air and a longer life. No German engineer ever came to the Rplace United States to experience what summer Bksch can be.
Porsche started with the 3 coil regulators which also monitored the votage. They VW Vento 1H2 1991-1998 Bosch S5 Battery 100Ah Electrical System Replacement Part to the two coil regulators because of the price.
Later two coil silver regulators added early 70's an electronic package in the regulator and it became partially electronic and partially mechanical.
These require a different method of Polerization. Through the years, mecanical wear will occur in the generator, the wires will lose their insulation the brush spring will become weak and the caps that hold the bearing will enlarge do to imbalances in the air blower. Some that restore your VW Lt 40-55 Mk1 1975-1996 Bosch S3 Battery 77Ah Electrical System Replace Part system will understand these situations and be able to provide correct service, others are clueless.
Bosch was always looking for the lowest bidder and fell victem to the clueless. When you have the generator restored, everything should be replaced except for the case and the end caps need to be properly shimmed to keep the armature from rubbing against the case.
Replaxe proper torque is shown in the shop manual. Fri Dec 04, 6: I guess I should make some effort to respond to this Subject.
First I am an graduate electrical engineer, with two enlistments in the Navy. I am retired and will be 80 this month. Work has included steel mills in Germany, France and Wales.
All of the mill motors are dc. Open pit and underground mining. Plus taught for 5 years at the Colorado School of Mines. A rule of thumb known around the world is a dc brush is rated at 60 amps per square inch. A brush cannot be under current for long periods as it will strip the film from the commutator surface.
This is what makes it tough for a generator in a car, and what dictates it be allowed to run at higher currents. Notice the brush was the same for the Pre A on up to the T6 cars. Yet the watt rating continued to grow with each model. The generator for the "A" cars was watts, and the regulators are stamped with 24 amps. Of course this marking is in error, Bosch forgot to include the field current of 4 amps. Or 27 amps X 7. Lets look at the larger diameter generators VW Lt 40-55 Mk1 1975-1996 Bosch S3 Battery 77Ah Electrical System Replace Part Ford Galaxy Wgr 1995-2006 Vetech Battery 70Ah Electrical System Replacement Part knew they were up against the wall.
They had to go with larger brushes, and the new VW Lt 40-55 Mk1 1975-1996 Bosch S3 Battery 77Ah Electrical System Replace Part frame for the 30 amp generator. Why have they lasted this long, simple the VW Lt 40-55 Mk1 1975-1996 Bosch S3 Battery 77Ah Electrical System Replace Part was run more, this keep the battery up, and people drove them as received.
Now they add extra driving lights, one guy told how he had a watt sterol installed. This must have slowed his car down when he cranked the tunes, remember the generator is rated at only watts. Now we are using the sealed battery that has a low impedance, this aids in starting thebut it also increases the charging current considerably.
At Sedona, a gentleman from Texas asked me to look at his The generator had thrown solder from the risers. I had a few generators, so he installed one. His car had nothing extra and his battery had been on a tender through the night. His fan was missing the baffle plate, I mentioned this to. So when the engine was fired up, a Hall type clamp-on ammeter was used to check the current.
Allowed by the small silver regulator. The small silver reg was pulled, and a big black Bosch installed. This reg had been calibrated, and allowed 23 amps to be pulled from the generator. It is rare to have to shim the end bells for a proper bearing fit. Some shops do this as a manner of rebuild. Then the VW Lt 40-55 Mk1 1975-1996 Bosch S3 Battery 77Ah Electrical System Replace Part is too tight to allow the armature and shaft to thermally expand.
By definition, the VW Lt 40-55 Mk1 1975-1996 Bosch S3 Battery 77Ah Electrical System Replace Part end is not to move but the pulley end must be allowed to expand. More and more I am getting generators with the solder thrown, and the CO contacts burned off. Or the solder on the brush rivets melted.
All from over current. Heat is a function of the current squared. Friday, December 04, VW Lt 40-55 Mk1 1975-1996 Bosch S3 Battery 77Ah Electrical System Replace Part Dec 05, 2: Hi to you all, Let me start by saying I know neither Al or Joe personally, in my experience you don t buy chicken from the fish monger. Joe is an Electrical Engineer, it his business to know, and by the sounds of things he has done a great deal. Sat Dec 05, Actually, I have learned a lot from reading both of these posts.
I appreciate the depth of knowledge and these details would never be brought to light without the discussion. The two coil regulator cannot properly limit the current when the battery voltage is below 12V. VW Lt 40-55 Mk1 1975-1996 Bosch S3 Battery 77Ah Electrical System Replace Part this fortunately there is a fix with the Bosch solid VW Lt 40-55 Mk1 1975-1996 Bosch S3 Battery 77Ah Electrical System Replace Part regulator.
It looks crappy but works properly. As far as maintaining the battery voltage, it is fairly common to have some device, such as a radio, or some miswired component causing a current VW Lt 40-55 Mk1 1975-1996 Bosch S3 Battery 77Ah Electrical System Replace Part. If there is no current drain, a normal battery will maintain its charge without a battery maintainer for long periods.
One thing you could do is install a battery disconnect, and use it when the car is sitting. It is also important to maintain the Peugeot 605 6B 1989-1999 Bosch S3 Battery 70Ah Electrical System Replace Part charge if freezing temperatures are anticipated.
Again, it looks improper, but this is a very practical solution. Sat Dec 05, 1: The VW alternator installed on a motor. Does it look right? Hell no, it looks way out of place. Got to make it look stock, that's a given, But also make it function without all the headaches. So my question to Joe, VW Lt 40-55 Mk1 1975-1996 Bosch S3 Battery 77Ah Electrical System Replace Part whomever. Why did the car market swirch from generators to alternators?
Systek, alternators have no brushes to go bad. But they do have diodes that go bad. I just replace the alterator in a VW Lt 40-55 Mk1 1975-1996 Bosch S3 Battery 77Ah Electrical System Replace Part Lancer. The freakin core charge was Eletrical than what we used to pay for a new alternator. Sat Dec 05, 9: Why the change from generators to alternators?