Brakes, Water Expansion Tank and New Batteries?

mogwild

New member
:smiley_drive:

Hi I have a few questions / problems that were not answered by the manuals that I have for the S404.1.

After bleeding the brakes - Master cylinder, driver side rear, passenger side rear, passenger side front and then the drivers side front and no leaks showing the brakes still go soft. If I pump the brakes they get hard again (and still no leaks) but if I wait they go soft again. Do I have to rebuild the Master cylinder?

Checking the manual I noticed that there is no indication as to how much fluid to add to the Water Expansion Tank? I thought that I saw somewhere that the level needed to be to the bottom of the neck of the tanks refill port!

Has anyone tried the AGM batteries in the 404? Some are using them in the Pinzgauers?
I was looking at the spec’s of the AGM Impulse Electronics battery P/N BA-UB12900-ds
The original battery has a 55Ah rating (according to the manual) this battery has a 90Ah rating. The stock battery is about 10mm less in width, 4mm less in length and about 20mm in height (as best that I could get with a metric tape measure. So I do not see any reason that it would not work. The stock Generator (alternator) is 24v – 19a – 27a (300 – 750 Watts). I do not know which one I have in the S404.1 troop carrier.

http://www.impulseelectronics.com/pdfs/BA-UB12900-ds.pdf http://www.impulseelectronics.com/batteries.htm
 

63tlf8

Observer
:smiley_drive:

Do I have to rebuild the Master cylinder?

Checking the manual I noticed that there is no indication as to how much fluid to add to the Water Expansion Tank?

Has anyone tried the AGM batteries in the 404?

The stock Generator (alternator) is 24v – 19a – 27a (300 – 750 Watts). I do not know which one I have in the S404.1 troop carrier.

Hi Mogwild,

On the basis that your Doctor may not get it right if you rang him with your symptoms, these are some thoughts that come to mind, but they may not be the solutions to your problems.

1. Maybe, but first have you correctly adjusted the brake shoes?

2. Top up the expansion tank to perhaps 2 inches below the neck and see if you have any overflow when its hot. This is a high volume low pressure system without a catch tank so you don't want to keep pushing good coolant out on to the road. Assuming your system has no leaks you'll find a level that settles to a constant when cold. That will be your top up level.

3. Why would you want AGM batteries in a MOG. I know people use them but a set of standard wet cell batteries works just fine and should last 5 years or more. Having wet cells also teaches you about batteries if you do your maintenance.

My philosophy, which no one else may agree with is if you have a hugely maintenance intensive truck by modern standards and you do your maintenance properly then checking the battery is such a small addition and it helps you to see if your cables are OK, terminal condition etc - which would likely not be checked if you had maintenance free batteries.

4. You probably have the 300w generator. You can check the generator for that information. It is most likely stamped on the top of the cylinder housing at the front. Higher output generators were generally options for specific use vehicles, however in the intervening years, who knows what has been added.

Free advice, spend the difference between the AGMs and wet cells on an owners and maintenance (shop) manuals, if those are not what you already have. You'll get lots of free advice via forums, some worth much more than you may be willing to otherwise pay, and some could cost you plenty. These MOGs are old but they are quite sophisticated in their own way and you will get a great deal of satisfation of ownership if you know and respect their design philosophy.

Enjoy

Tony
 

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