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Author Topic: 6-71 diesel  (Read 3035 times)

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Offline Satamax

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Re: 6-71 diesel
« Reply #20 on: August 15, 2017, 04:09:42 pm »
I have a radiator cap. 7lbs one.
French CD4 sawmill. Latil TL 73. Self moving hydraulic crane. Iveco daily 4x4 lwb.

Offline Bert

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Re: 6-71 diesel
« Reply #21 on: August 16, 2017, 06:50:55 am »
I dont think the issues are related at all. That flap is just a safety to stop a run away engine. I cant believe it would be tied to an overheating problem. Id take the solenoid off and just make it a mechanical flap. Something you could trip if the situation called for it. Its not a good thing for it to be closing. It will suck the seals out of your blower.
Saw you tomorrow!

Offline Satamax

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Re: 6-71 diesel
« Reply #22 on: August 16, 2017, 07:43:12 am »
Bert, this solenoid actuated flap is linked to the temperature sensors. I think the best i can do, is buy a new  water pump. Drain the coolant, run water with a cleaning agent for some time. Then hose the innards. And get back to -35c coolant.
French CD4 sawmill. Latil TL 73. Self moving hydraulic crane. Iveco daily 4x4 lwb.

Offline bandmiller2

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Re: 6-71 diesel
« Reply #23 on: August 16, 2017, 08:27:23 am »
Max, that genset was left over from the great war. I would suspect restrictions in the cooling system. Checking the water pump is good form they are rebuild able but one that old should probably be replaced. The emergency shut down should be operable but not used, as Bert says its hard on the seals to trip. You could retain the solenoid but not have it tied to the temperature sensor. Unless that engine was modernized its an old two valve head with "J" injectors. You will always get smoke from it. Later detroits went to a four valve head and "N" series injectors, to cure its smoking habit. To clean the cooling system I use oxalic acid, run for a wile then drained flushed and neutralized with baking soda. Frank C.
A man armed with common sense is packing a big piece

Offline Satamax

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Re: 6-71 diesel
« Reply #24 on: August 16, 2017, 09:02:21 am »
Thanks a lot Franck.

Yep, ww2 genset. Modernized in late 60 early 70's.
Alternator is a french one. Of proper specs.  I wonder how i could test the pump. As well, i'm not asking much. 22kw. For a 80kw alternator.

If it gets all messy, i'll resell the 6-71. And use the unic V8 i gonna buy on a broken snowblower later tonight. Might even resell the genset, and ask a friend to resell me another alternator he has in stock.
French CD4 sawmill. Latil TL 73. Self moving hydraulic crane. Iveco daily 4x4 lwb.

Offline Bert

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Re: 6-71 diesel
« Reply #25 on: August 16, 2017, 09:30:22 am »
Ahhh ok. Ive never seen one set up like that. Pretty fancy to have an overtemp condition close the flap. Agree its prob best to just clean/flush it all out and see what happens with the temp. I had one that the block cracked and was doing all kinds of weird things. The ones made during the war were produced so fast the blocks didnt cure properly and were prone to cracks I was told.
Saw you tomorrow!

Offline bandmiller2

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Re: 6-71 diesel
« Reply #26 on: August 19, 2017, 04:11:30 pm »
Max, what is the standard cycles (hertz) used in your country.?? Depending what your genset was used for it may not match your new mills motor. Ours is pretty much standard 60 cycles. Frank C.
A man armed with common sense is packing a big piece

Offline Satamax

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Re: 6-71 diesel
« Reply #27 on: August 19, 2017, 04:44:58 pm »
Thanks a lot Frank, for your reply.

Well, i'm running 1500 rpm, 50HZ 380V (well, a smidge low at 375vac)

The alternator is a french one. Don't know when it's been retrofitted to this. But all the wiring is late sixties or seventies. Everything should be fine.

If the worse comes, or if i get really fed up with this. I have just scored a "unic" V8 of 852 ci. With only 105 hours. in my snowblower.

http://www.forestryforum.com/board/index.php/topic,97397.0.html

I think this detroit gonna go to WW2 heavens. I mean, to a collector.  And i will run a monster slower, as i have a 2 speed transmission behind the V8. I'd like to run it at idle, or a bit more. And still produce power. Only problem, i have no governor on the engine. But nothing which can't be fixed with electronics.


French CD4 sawmill. Latil TL 73. Self moving hydraulic crane. Iveco daily 4x4 lwb.

Offline Satamax

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Re: 6-71 diesel
« Reply #28 on: August 19, 2017, 04:52:06 pm »
Same engine as this one.

French CD4 sawmill. Latil TL 73. Self moving hydraulic crane. Iveco daily 4x4 lwb.

Offline Satamax

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Re: 6-71 diesel
« Reply #29 on: August 23, 2017, 08:53:37 am »
Dang thing.

Overheated again today. Above boiling point.  Steam Comming out   >:(
French CD4 sawmill. Latil TL 73. Self moving hydraulic crane. Iveco daily 4x4 lwb.

Offline gmmills

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Re: 6-71 diesel
« Reply #30 on: August 23, 2017, 09:56:56 pm »
Satamax

     Try pulling the water pump and check the end of the drive shaft mounted in the blower housing. Make sure it is not warn or broken. Just need to confirm that the pump drive is actually rotating the water pump. I have seen this only one time many years ago. Virtually did everything you have previously tried to no avail. It ended up being the water pump drive shaft had warn past proper engagement, just slipped. No pump rotation.
Custom sawing full-time since 2000. 
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Offline Satamax

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Re: 6-71 diesel
« Reply #31 on: August 24, 2017, 01:58:22 am »
Ok, thanks a lot for your reply.

I know i have to do it. But, i need containers to save the coolant. It's new from last year (ok, not new then) and the engine has been run only 5 or six times since.

I need to address this.

Thanks again.

Max.
French CD4 sawmill. Latil TL 73. Self moving hydraulic crane. Iveco daily 4x4 lwb.

Offline sealark37

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Re: 6-71 diesel
« Reply #32 on: August 24, 2017, 02:06:37 pm »
A diesel that overheats with no obvious problem usually has a blown cylinder head gasket.  How many hours on your engine since overhaul?    Regards, Clark

Offline Satamax

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Re: 6-71 diesel
« Reply #33 on: August 24, 2017, 02:20:14 pm »
Hi Clark.

I should admit, i have no idea. I have started draining it. But ran out of containers. There's no mayo in the coolant.
French CD4 sawmill. Latil TL 73. Self moving hydraulic crane. Iveco daily 4x4 lwb.

Offline Satamax

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Re: 6-71 diesel
« Reply #34 on: August 29, 2017, 01:24:18 pm »
Well, taken the pump appart, locks on the drive. Pump seems real nice. But trying to bleed the oil heat exchanger,  nothing comes out.  Next step, open and check.  Head gasket is real oily.
French CD4 sawmill. Latil TL 73. Self moving hydraulic crane. Iveco daily 4x4 lwb.

Offline Satamax

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Re: 6-71 diesel
« Reply #35 on: August 29, 2017, 02:01:03 pm »
Taken the ruber pipe at the bottom.  Water flows through.  Depressing!
French CD4 sawmill. Latil TL 73. Self moving hydraulic crane. Iveco daily 4x4 lwb.

Offline Grizzly

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Re: 6-71 diesel
« Reply #36 on: August 30, 2017, 12:41:38 pm »
Nobodies mentioned it so maybe I'm way out in left field. I notice that screamer being run at 1500rpm. Any Detroit I've run and any mechanic I've been taught by says that those old detroits should not be laboured or loaded below 1900rpm. On our old truck (1980 Ford L8000 w/6-71N) it is very noticeable that as soon as you work the engine below 1800rpm temperature rises quickly. From what I remember exhaust temps rise very high (over 1200F) when you get into those lower rpms. I know there's some experts on here and I'm not trying to be one just offering my tidbit.
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Offline Satamax

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Re: 6-71 diesel
« Reply #37 on: August 30, 2017, 03:27:05 pm »
Thanks a lot Grizzly.

That's mad. An engine you can't run at low rpm? Or it overheats? Well, i have to tap for the broken stud on the pump. Reassemble everything, refill with coolant. And run it when it's colder. I don't have high hopes. All the circuit is clean. I really wonder what is going on. I looked at the coolant, flashy yellow originally. Now it's brownish. Is it the rust, or is it exhaust gases getting in the coolant, because of a blown head gasket. I washed the whole circuit today.

If it continues to overheat, in goes the V8.
French CD4 sawmill. Latil TL 73. Self moving hydraulic crane. Iveco daily 4x4 lwb.

Offline Kbeitz

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Re: 6-71 diesel
« Reply #38 on: August 30, 2017, 07:16:58 pm »
At a race shop you can buy a water wetter. It makes your water wetter and help
the rad keep things cool. It really works.
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Offline Satamax

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Re: 6-71 diesel
« Reply #39 on: August 31, 2017, 01:19:08 am »
I was looking that way too.

Thanks Kbeitz
French CD4 sawmill. Latil TL 73. Self moving hydraulic crane. Iveco daily 4x4 lwb.