UNIMOG 404 Brake System Antifreeze Pump : eBay Motors (item 110492528280 end time Feb-12-10 10:38:48 PST)

 

Here are three more:

Frostschutzpumpe Unimog S 404 411 2010 Frostschützer bei eBay.de: Nutzfahrzeugteile (endet 06.03.10 16:54:12 MEZ)


Wabco Frostschutzpume Unimog 404 406 411 416 421 bei eBay.de: Oldtimer-Teile (endet 15.03.10 13:01:10 MEZ)

Bundeswehr Unimog 404 MAN Frostschutzpumpe WABCO bei eBay.de: NATO-Shop (endet 04.03.10 08:13:57 MEZ)

 

Here are three more:

Genuine thanks to tgreening and needmog. Learn something new every day. I'm not an E-Bay person so it would have been the very last place I would have thought to look. I'm inundated with sources now so I just have to go get one, quickly.

Again, many thanks for the help.

Cheers

Tony

 

Do all 404's have air assist?

 

nope

 

Is it on a truck by truck basis or did it come with certain designations?

 

some fire truck mogs had an engine driven air pump and a pressure booster for the brakes. It got very complicated on the 404 fire trucks that used the 406 cab, something like 2 separate cylinders per wheel and a tom more brake line. Bigmellon has one, he could say for sure.

 

Both of my 404.115's have air assist.

 

think one way can consider it is.... most Troop Transport type Military 404's did NOT have Air Assist. Most civil use (Fire, airport etc) did and the Radio Boxed Mogs did if Im not mistaken.

 

The 404 trucks have four different types of brake system:

1. Single circuit vacuum assist hydraulic. 404.1
2. Twin circuit vacuum assist hydraulic, single circuit plus tandem front only. 404.0/404.1
3. Twin circuit with compressed air assist and twin circuit trailer assist. 404.0
4. Single circuit with compressed air assist and twin circuit trailer assist. 404.1

The trend is that the 404.0 trucks were mostly civilian application trucks for farming etc. Likewise the 404.1 trucks were split between military and civil service trucks. The brake application seems to break down based on the GVWR of the specific truck with the heaviest trucks being 404.115 which saw a large application as fire fighting trucks, topping out at a beastly 5500kg. The manual shows the 404.0 as having the 406/416 cab and the 404.1 having the traditional 404 cab. The 404.0 trucks were offered with the 110hp M130 or the 82hp M180, 404.1 truck had either the 82hp M180 or the high output 91hp M180. And to make it extra confusing, the air systems are available with or without an antifreeze system but the 404.1 has an active pump system and the 404.0 has a passive if equipped.

404.1 with out brake assist - 4750gkg
404.0/404.1 with brake assist - 5000kg
404.1 with brake assist and reinforced springs - 5200kg
404.1 with brake assist and reinforced springs - 5500kg for fire & disaster service

Additionaly, trailer loading at maximum GVWR is as follows
(82hp M180)
@ 4750kg gvwr - 4750kg gtwr = 9,500kg gvcwr (no trailer brake) (DIN74051)
@ 5000kg gvrw - 5000kg gtwr = 10,000kg gvcwr (no trailer brake) (DIN74051)
@ 5250kg gvrw - 5000kg gtwr = 10,250kg gvcwr (no trailer brake) (DIN74051)
@ 5500kg gvrw - 4750kg gtwr = 10,000kg gvcwr (no trailer brake) (DIN74051)

(110hp M130)
@ 4750kg gvwr - 4750kg gtwr = 9,500kg gvcwr (no trailer brake) (DIN74051)
@ 5000kg gvrw - 5000kg gtwr = 10,000kg gvcwr (no trailer brake) (DIN74051)
@ 5250kg gvrw - 5000kg gtwr = 10,250kg gvcwr (no trailer brake) (DIN74051)
@ 5500kg gvrw - 5500kg gtwr = 11,000kg gvcwr (no trailer brake) (DIN74051)

(82hp M180)
@ 4750kg gvwr - No Application
@ 5000kg gvrw - 5000kg gtwr = 10,000kg gvcwr (trailer brake)
@ 5250kg gvrw - 5000kg gtwr = 10,250kg gvcwr (trailer brake)
@ 5500kg gvrw - 4750kg gtwr = 10,000kg gvcwr (trailer brake)

(110hp M130)
@ 4750kg gvwr - No Application
@ 5000kg gvrw - 7000kg gtwr = 12,000kg gvcwr (trailer brake)
@ 5250kg gvrw - 7350kg gtwr = 12,600kg gvcwr (trailer brake)
@ 5500kg gvrw - 7700kg gtwr = 13,200kg gvcwr (trailer brake) -go 404 go!-

So with the lightest possible truck rated for 20,900lb GVCWR on a single circuit vacuum assist and the heaviest slated for 29,040 GVCWR with twin circuit air over hydraulic and trailer braking it looks to me like a well cared for system should be able to do just fine for everyday use.

On a side note, can someone explain the difference between the Rockinger/Ringdelfer 6.5 metric tonne and Ringdelfer 4 metric tonne systems? It appears that one is a lunette eye while the other is some form of sway controlling design with a spade to limit travel. The manual neglects to mention which is which.

 

But your list does not include probably 95% of all 404 trucks!!!! : single circuit and NO brake assist. Plus, many of the 404's with air compressors had no air (or vacuum) assist for the truck itself.

Bob

The 404 trucks have four different types of brake system:

1. Single circuit vacuum assist hydraulic. 404.1
2. Twin circuit vacuum assist hydraulic, single circuit plus tandem front only. 404.0/404.1
3. Twin circuit with compressed air assist and twin circuit trailer assist. 404.0
4. Single circuit with compressed air assist and twin circuit trailer assist. 404.1
...chop....

 

Hrmm, what I tossed out is right from the glove box manual.

So there is a single circuit with no power assist?

As for positive air systems, they do not discuss a trailer air only system. They don't even list trailer braking as possible without chassis air assist.

But as with all things 404, who knows what the official word on anything was.

 

Correct. I bet over 95% of 404's don't have assisted brakes.

I always keep my brakes in really good shape. I have never found the unassisted brakes to be insufficient. The 404 brakes are pretty powerful, you just have to stomp on the brakes little harder.

 

Man these deep fried crows legs taste great, you guys should try some.

So I read and re-read the section and they make this small mention of a single circuit with no assist at all. So I'll accept the correction.

Make that 5 different brake packages.