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Author Topic: 6-71 diesel  (Read 3179 times)

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Offline jdw

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6-71 diesel
« on: August 06, 2016, 11:46:06 pm »
Looking into a 6-71 anyone have info on the fuel usage? Running a saw and edger?

Offline Satamax

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Re: 6-71 diesel
« Reply #1 on: August 07, 2016, 01:38:44 am »
Not yet sorry.

Tho, i hope you know they are noisy! Real noisy!
French CD4 sawmill. Latil TL 73. Self moving hydraulic crane. Iveco daily 4x4 lwb.

Offline ozarkgem

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Re: 6-71 diesel
« Reply #2 on: August 07, 2016, 04:47:36 am »
I have never ran one but I would guess 4-6 gal per hr. We will see how close I am from someone who actually uses one.
Mighty Mite Band Mill, Case Backhoe, 763 Bobcat, Ford 3400 w/FEL , 1962 Ford 4000, Int dump truck, Clark forklift, lots of trailers. Stihl 046 Magnum, 029 Stihl. complete machine shop to keep everything going.

Offline jdw

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Re: 6-71 diesel
« Reply #3 on: August 07, 2016, 11:01:30 am »
I know there loud but there a powerhouse. Plus I kinda like the way they sound lol ;D

Offline Satamax

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Re: 6-71 diesel
« Reply #4 on: August 07, 2016, 11:51:35 am »
I know there loud but there a powerhouse. Plus I kinda like the way they sound lol ;D

I have piled strawbales around mine. On three faces. About 3 ft away.  Cuts the noise a bit. I might be the only nutter in France, running a detroit genset!  ;D

Ran it a while yesterday. To power the saw. I'm having troubles! The RPM drop when i hit the delta ( triangle) position at startup!

Here's when i got it! :D

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

Offline jdw

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Re: 6-71 diesel
« Reply #5 on: August 07, 2016, 01:05:32 pm »
Yep that's the sound of a Detroit  ;D

Offline barbender

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Re: 6-71 diesel
« Reply #6 on: August 07, 2016, 02:36:46 pm »
@Gearbox runs a circular mill powered with a DD at the local threshing show, I didn'the even realize it was a DD until I looked closely at the engine. They have the stack terminate about 12' up in the air, and it is amazingly quiet.
Too many irons in the fire

Offline SineWave

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Re: 6-71 diesel
« Reply #7 on: August 07, 2016, 07:21:45 pm »
I know there loud but there a powerhouse. Plus I kinda like the way they sound lol ;D

Lol, me too! I've got a Deutz air-cooled diesel on my engine driven welder and that sounds pretty sweet, too!


Offline Bert

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Re: 6-71 diesel
« Reply #8 on: August 08, 2016, 02:25:33 pm »
I use a 671 on my Frick. It uses about 2 gal an hr governed at 2100RPM.
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Offline Satamax

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Re: 6-71 diesel
« Reply #9 on: August 08, 2016, 06:04:43 pm »
I use a 671 on my Frick. It uses about 2 gal an hr governed at 2100RPM.

Not bad!

I can expect less on mine at 1500rpm then!
French CD4 sawmill. Latil TL 73. Self moving hydraulic crane. Iveco daily 4x4 lwb.

Offline ozarkgem

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Re: 6-71 diesel
« Reply #10 on: August 08, 2016, 06:49:11 pm »
I use a 671 on my Frick. It uses about 2 gal an hr governed at 2100RPM.
better than I thought. Not bad considering how much you can saw in an hour
Mighty Mite Band Mill, Case Backhoe, 763 Bobcat, Ford 3400 w/FEL , 1962 Ford 4000, Int dump truck, Clark forklift, lots of trailers. Stihl 046 Magnum, 029 Stihl. complete machine shop to keep everything going.

Offline Bert

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Re: 6-71 diesel
« Reply #11 on: August 08, 2016, 08:45:17 pm »
No not bad at all. Fuel use has never been a complaint of mine. We do about 4500 FT in 6-7 hrs. Which includes shutting the mill off to cut up lumber to length and load logs on the deck. Alot of blocking but some grade and pallet boards.  Detroits are pretty common around here as power units. At least they were until everybody closed up shop due to markets :-\
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Offline Satamax

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Re: 6-71 diesel
« Reply #12 on: August 11, 2016, 07:22:29 am »
Well JDW, sorry i'm hacking a bit your thread.

Is there anybody here, who know the causes of the emergency stop flap closing?

Yesterday, it stopped on me again. The temp was at 100C normally it's more like 80C/90C

The blower casing was verry hot.

Or may be some of you know a troubleshooting chart somewhere on the net?

I have read and reread the manuals i have. And there is little on the emergency flap.

Thanks a lot guys.

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

Offline ozarkgem

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Re: 6-71 diesel
« Reply #13 on: August 11, 2016, 07:31:57 am »
Well JDW, sorry i'm hacking a bit your thread.

Is there anybody here, who know the causes of the emergency stop flap closing?

Yesterday, it stopped on me again. The temp was at 100C normally it's more like 80C/90C

The blower casing was verry hot.

Or may be some of you know a troubleshooting chart somewhere on the net?

I have read and reread the manuals i have. And there is little on the emergency flap.

Thanks a lot guys.

Max.
I will look at mine but I wonder if the catch is worn and it is just not holding due to the vibration of the motor. I am really not sure how they are set up to trip during a runaway. How many hrs on your unit? Maybe you could find a used intake unit and replace the whole thing.
Mighty Mite Band Mill, Case Backhoe, 763 Bobcat, Ford 3400 w/FEL , 1962 Ford 4000, Int dump truck, Clark forklift, lots of trailers. Stihl 046 Magnum, 029 Stihl. complete machine shop to keep everything going.

Offline SPD748

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Re: 6-71 diesel
« Reply #14 on: August 11, 2016, 07:46:51 am »

Is there anybody here, who know the causes of the emergency stop flap closing?


Post a picture of the blower housing. Some are actuated by an air cylinder or electric solenoid. Most stationary engine flaps are manually activated either by remote cable or a small knob on the flap shaft itself. If it's arranged this way, there is a notch in the flap shaft that holds the flap open. That can become worn causing the flap to jump off the notch due to the vibration of the engine.

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Offline Satamax

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Re: 6-71 diesel
« Reply #15 on: August 11, 2016, 08:44:09 am »
Hi guys!

Thanks a lot for your replies.

Ozarkgem, no idea on the hours.  It's a GM stamped detroit. Baring just a 6-71 N on the plate. It's been redone in the sixties or seventies with a french alternator. As the wiring clearly shows, it's not a fourties or fifties one.



But has some copper acid etched plates on the doors for maintenance and greasing plans, which bear a contract number from 29 june 1944. Hence my guess on the rebuild.

SPD748, it's actuated by a solenoid, visible on the left of the blower here.



Thanks a lot for your help guys. One detail. I'm running the radiator open, as i don't have a radiator cap. So the thermostat might not oppen?
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 #16 on: August 15, 2017, 05:01:44 am »
Well JDW, sorry i'm hacking a bit your thread.

Is there anybody here, who know the causes of the emergency stop flap closing?

Yesterday, it stopped on me again. The temp was at 100C normally it's more like 80C/90C

The blower casing was verry hot.

Or may be some of you know a troubleshooting chart somewhere on the net?

I have read and reread the manuals i have. And there is little on the emergency flap.

Thanks a lot guys.

Max.

Hi Guys.

Sorry for the digging.

Well, it's acting the same again.

I have downloaded some manuals.

One question thought, would you run it without the thermostat? (calorstat i don't know or can't remember the name of this part in english)  If this one is flakey. This would may be help. I want to keep hobby sawing. I saw a trunk every now and then. I sawed a cubic meter of wood yesterday. Might saw one or two more in the next fortnight.

Has anybody ever cleaned the  cooling circuit.  Sandplugs and all?

I would like to know how it's done.

Thanks a lot guys.
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 #17 on: August 15, 2017, 01:29:35 pm »
So, checked if there was a thermostat, ans there's none un th thermostat housing.

Tho, it's seemingly overheating. I realy dont know wha to do.

Obvious one, check the water pump. How?

Last year,  emptied the whole engine, coolant wasn't that bad. Rusty collor, but no mud.

Anybody knows where are the sand plugs?
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 #18 on: August 15, 2017, 02:38:39 pm »
Couple questions. What is the actual issue as im having a hard time following? Is it the blower flap? Air actuated or mechanical this is just a safety thats user thrown. If its closing when its not supposed to its no sign of engine trouble. For overheating, do you run a temp gauge? If no rad cap and no thermostat Id have to believe it would be throwing steam out even slightly above ambient temp.
Saw you tomorrow!

Offline Satamax

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Re: 6-71 diesel
« Reply #19 on: August 15, 2017, 04:08:11 pm »
Hi Bert!

Thanks for your reply.

It's solenoid actuated. Well, seemingly it overheats slightly. 100c instead of the recomended 90c.  And then the dang flap closes.  No thermostat. Radiator seemed to be clean. Last time i drained it. No sign of mud. I'm a bit stumped.
French CD4 sawmill. Latil TL 73. Self moving hydraulic crane. Iveco daily 4x4 lwb.