[AT] Tractor cab heater

[Cecil R Bearden]

Dennis:
Thanks for the reply.   I have spent several late night hours learning 
about these.  Of course I should have looked at this better before 
buying.   There are not as many good deals on Ebay as there used to be.  
The D1L was built about 30 years ago and used the ECU to control 
everything.  The D2 unit looks to just vary the fan speed and that 
controls fuel flow, igniter, etc. The only external controls is the 
thermostat.   As you stated, the D2 is probably a more reliable unit as 
it has everything contained within the unit and probably uses a hall 
effect system to measure speed and the igniter.   I think they tried to 
over-complicate the D1L.  Sort of like using a computer chip to turn a 
light on and off.  Or as in the case of that D at mn#d 2000 Chevy 3500 of 
mine,they use a computer to turn on A/C comp relay,  when 5 years 
earlier, the thermostat did the same thing with no computer in 
between............  When the 2000 model gets a little low of freon, the 
a/C will not work at all.   It may work when I leave OKC, but if I get 
halfway to Tulsa, if does not work and I add less than a half can of 
freon and it is working again for another year.  However, if I add the 
full can, it quits working again..........

Like Charlie Hill said a few days ago.  I need to get a mid 70's Chevy 
and rebuild it with Pertronix and a TB fuel inj.
I had a 73 chevy 1/2 ton that was worked like a 1 ton truck now. It had 
more than 250Kmiles on it when we sold it, and it was used with a 20ft 
Gooseneck to pull an 1850 Oliver over a 75 mile trip at least 6 times a 
year.  The axle bearings were the weak point ( go figure) and we 
replaced a couple of rims that split at the bead!!!!!!   At that time, I 
did not understand what was really happening.  I just replaced it and 
went on....

Cecil in OKla



On 1/22/2016 10:52 PM, Dennis Johnson wrote:
> Cecil,
>
> I have not used this brand, but have design applications of dozens of heating systems with the Webasto brand heaters with Arctic Fox systems.. I think that the Webasto is a competitor that is more geared to automotive, where the Eberspacher units also have building heating systems, more mass production factory installs, etc. While doing many applications, I have not done the actual heater design myself.
>
> The issue I see is if this unit uses an ECU, trying to work around this is will be a challenge. Normally the ECU will modulate fuel based on outlet temperatures, exhaust temperatures, user settings, cool down times, water flow, etc. If you can find the ECU output wires, you might be able to manually turn on fuel,  igniters, and the water pump to make some heat. You will need some type of pressurized fuel, which could be a fuel pump or pressurized tank. You will also need fuel on and off valve The pressure needed would need to be checked with flow across the orifice to get a good burn.  If you can find the wires to make these things work, you could probably get the unit to I make some heat with manual controls.
> This is very much like taking a new engine with ECM, and going back to manual controls - except that you do not have access to carburetors  and magnetos. If you had a grandson/granddaughter in electrical engineering or computer science, this would be a good hands on project to replace the ECU with a laptop or similar controller.
> With older heater units what had a few relays, it would be a lot easier to do manual controls.
>
> One of the points of discussion with the heaters is the move to computerize them. The computer controls are great for control on simple systems that are mass produced. When having custom systems, the computer controlled systems do not work well because they are not programmed to match the custom systems. Because of this most oilfield systems are the older manual control models with a few relays and protection systems.
>
> Good Luck
>
> Dennis
>
>
> Sent from my iPad
>
>> On Jan 22, 2016, at 8:31 PM, Cecil R Bearden <crbearden at copper.net> wrote:
>>
>> My Old Belarus is  about 30 years old, so I guess it would qualify as
>> antique.   I use the newer one mostly for feeding cattle.  This wet
>> winter is a mess with the ice and the windows fogging up, not to mention
>> the frozen feet since I don't have the feeling in my toes from the
>> spinal injuries.   The Belarus just does not have warm enough water to
>> make the heater work.  The heater and A/C are a US aftermarket addition
>> installed in Milwaukee.  The A/C needs to be torn out and replaced.
>>    I found an Eberspacher diesel heater from a SAME tractor on Ebay for
>> $325, and thought it was ready to go.  It turns out it was only the
>> heater assembly, the model it was used a remote relay, ECU, and fuel
>> pump.  All parts that were not included.   I do not have enough
>> experience with these to try to reverse engineer the missing parts.
>> I think the best thing is to buy another complete unit even if it is
>> Chinese and then try to find parts to complete the one I have now. Do
>> any of y'all have any experience with these.   I would bet Steve W has
>> worked with them.
>>
>> I keep getting news reports about how you guys in the NE are staring
>> down the barrel of 26inches of snow.   That would be equal to our 2
>> inches of ice.   I wish I could be there to give you all a hand.
>>
>> Cecil in OKla
>>
>>
>>
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