About the battery box, it may be relocated to the truck bed. It was done on the xm757 8x8 when they decided to go fom 2 to 4 batteries. Note box behind the rear bulkhead, passenger side on the platform....
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Bjorn
MEP-018A (needs new generator head)
Avatar: XM757 in OK prepared for 1,000 mile trip home. Part of 6,000 mile journey in 2006.
1968 M49A2C modified with 1960 M756A2 truck bed and 1975 HIAB 765A knuckleboom, exhaust brake, VIC-1 and more.
1969 Ford XM757 8x8, 5-ton Pershing 1A truck tractor...the "improved MV".
"Some things can't be made better, just differently......a lot of things actually"
Well I have been poking at this for a few days now, so I thought I should mention I just won one of these units. Just the heater though, so I will have to figure out the installation. It takes the 5 plug cable. I am working on a cable now, but don't yet have any leads on the controller. I currently have the 5 plug controller made by Benmar MP that has one on/off switch, a light indicator, and a resetalbe breaker, but it does not match the one above in Bjorns pics. Anyone have a manual for this thing?
South Wind Coolant Heater Model 939J24
Total Output 23,000 BTU
Coolant Output 15,000 BTU
Army No 11601698
Fuel Pressure 3 lbs min. 15 lbs max
Negative Ground Only
Amps 11 (Start) Run (1.5)
Serial # 8815
Good purchase Ethan. That heater is shown in my 8x8 manual with a separate pump to circulate the coolant (image below).
You need a controller with a 5-pin connector on the back plus a separate lead, which goes to 24 vdc.
__________________
Bjorn
MEP-018A (needs new generator head)
Avatar: XM757 in OK prepared for 1,000 mile trip home. Part of 6,000 mile journey in 2006.
1968 M49A2C modified with 1960 M756A2 truck bed and 1975 HIAB 765A knuckleboom, exhaust brake, VIC-1 and more.
1969 Ford XM757 8x8, 5-ton Pershing 1A truck tractor...the "improved MV".
"Some things can't be made better, just differently......a lot of things actually"
heater wiring is shown in the manual, that looks like the controller as the others have high / low
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tom bauer m-621
air conditioned - 28° air
real 6 wheel drive - air lockers
real power steering - hydraulic
real fast - now 1 of 15 with .69 od !!! http://waterloospecialties.webs.com/
m-35 transmission expert
multifuel head gaskets, new style, $80, free shipping
avatar - 64mph @ 2400 rpm with 14.5R20XL
The pic that Bjorn posted above clearly shows a controller labeled as the engine heater. It show one switch being HI/LO, a light, and then a START/OFF/RUN switch. Once I have the heater at home I should have a better idea on this though as it appears to have the wiring diagram on the data plate. The wire I hope to get has the 5pin connector and a seperate wire, so I guess that is the one. I will have to keep my eyes open for a 24V coolant pump. My idea is to use this to heat the cab at a reststop perhaps, so that I can turn off the truck, and imagine forced coolant flow would be more reliable then convection.
Ok I apparantly have TMphobia like many around here. I overcame my fear of 700-1500page manuals with a little help from some of the guys last evening. Wow! I think I have most the information I need for this. I have the routing of wire/exhaust/fuel, needed controllers, locations, etc. The only thing that I would still like to find is the manual from South Wind for the actual heater. Bjorns pics of the needed controller are correct where it needs a HI/LO and a START/OFF/RUN switches.
Ethan, why don't you plan a trip to my place, I'm only a couple of hours away and I can show the projects you are working on as installed on my vehicles, the HIAB, the alcohol evaporator, the fuel burning heater etc...
I'm here most of the time generally speaking. Do a mapquest for zip 24120.
__________________
Bjorn
MEP-018A (needs new generator head)
Avatar: XM757 in OK prepared for 1,000 mile trip home. Part of 6,000 mile journey in 2006.
1968 M49A2C modified with 1960 M756A2 truck bed and 1975 HIAB 765A knuckleboom, exhaust brake, VIC-1 and more.
1969 Ford XM757 8x8, 5-ton Pershing 1A truck tractor...the "improved MV".
"Some things can't be made better, just differently......a lot of things actually"
Could anyone be so kind as to post a quick description of how these run? Meaning, (on the convection ones) does the fan come on first, and then the fuel runs for a bit, and then the ignitor come on? Also, what is the shutdown sequence? Pure observation would work for me.
Also, do you need a seperate fuel pump to run these, or are they happy to be on the return line from the engine?
Thanks a ton,
Bob
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Old Build:
1968 M35A2, repowered with Cat 3208T and Spicer 6855 .695 OD - mostly* sold
Ross Hydrapower steering - still available
Next build - Cummins 6CT, RTOO-14613, M35a2 Tcase, 5 ton axles, Arvin Meritor 16.5x7 Q series brakes, M35a2 sheetmetal*, 14.00x20 Michelin XL's on HEMTT wheels.
Status: Runs and drives, needs front driveshaft.
Bob, it works like this, first push the light on the controller to make sure it is working and there is voltage.
Next hold the momentary contact switch in "start" position, it will turn on the fuel pump, the blower (runs at reduced speed) and the ignitor. The "HI/LO" switch should be in "LO".
Some of the fuel is soaked up by a wick, which is close to the ignitor (works like a cigarette lighter in a car) and some of the fuel is vaporized. After about 30 seconds you'll see smoke from the exhaust and soon you hear the fan increasing speed and the light on the controller comes on as a flame has been detected. Now you'll flip the start switch to "RUN" position and you have hot air. Use "HI" for more heat.
To stop, flip the "START/OFF/RUN" switch to "OFF". The fuel pump now stops, but the fan keeps running until the flame goes out (all automatic) and after 2 to 3 minutes the units shuts down.
It can be restarted immediately if desired.
The "Emergency off" switch shuts power to everything and the unit should not be restarted right away, since an abnormal shut-down took place, fuel is still in the burner.
The heater needs its own fuel pump since it's under control of the heater. It also has its own fuel filter.
Exhaust is never mixed with the hot air, two separte pathways thru the heater.
__________________
Bjorn
MEP-018A (needs new generator head)
Avatar: XM757 in OK prepared for 1,000 mile trip home. Part of 6,000 mile journey in 2006.
1968 M49A2C modified with 1960 M756A2 truck bed and 1975 HIAB 765A knuckleboom, exhaust brake, VIC-1 and more.
1969 Ford XM757 8x8, 5-ton Pershing 1A truck tractor...the "improved MV".
"Some things can't be made better, just differently......a lot of things actually"
