Jump to content

Recommended Posts

Superdog still has that W71 tractor for sale I think? He was asking good money but it so far appears to be the only tractor to survive. Just search Very Rare W-71T it was posted in 2012. Nevermind I see you revived that thread in December. Send him an offer... 😉 

Share this post


Link to post
Share on other sites
18 minutes ago, cncFireman said:

Superdog still has that W71 tractor for sale I think? He was asking good money but it so far appears to be the only tractor to survive. Just search Very Rare W-71T it was posted in 2012. Nevermind I see you revived that thread in December. Send him an offer... 😉 

I looked at that truck before he bought it, should not have passed on it!!    terry:MackLogo:

Share this post


Link to post
Share on other sites
2 hours ago, cncFireman said:

Superdog still has that W71 tractor for sale I think? He was asking good money but it so far appears to be the only tractor to survive. Just search Very Rare W-71T it was posted in 2012. Nevermind I see you revived that thread in December. Send him an offer... 😉 

As much as I want to, I don’t have the money, time, money, energy, money, means, money, knowledge, or money to get that truck and put it back on the road... besides I know if I did have all those things I’d want to do something to it that’d make someone unhappy...

Share this post


Link to post
Share on other sites
8 hours ago, CaptainCrutch said:

The W actually used the same frame rails as the LT, with a dip at the front so the engines would sit lower... other than that I’m just repeating what Mack themselves have said...

The H is the cabover L but the W is specifically the cabover LT...

The W model used the same frame rails as the LTL. The LTH was 1/16" thicker and of course less aluminum pieces. I have built from scratch both the LTL and the W model. Until you get up to the front spring hangers and the front axle they are identical as frame and cross members go. of course there is also the cab mounts that differ.

  • Like 1

Share this post


Link to post
Share on other sites
15 hours ago, mackdaddy said:

The W model used the same frame rails as the LTL. The LTH was 1/16" thicker and of course less aluminum pieces. I have built from scratch both the LTL and the W model. Until you get up to the front spring hangers and the front axle they are identical as frame and cross members go. of course there is also the cab mounts that differ.

I saw on some factory chassis schemas that W frame rails had spread to the front like say B-model did. At the same time I'm sure LT rails were straight front to rear if you look at them from the top. Any ideas on the matter? Just a wrong picture?

Share this post


Link to post
Share on other sites

That's it.

1848337295_MackW-71STpg4.thumb.jpg.f401042d3f62f8b69b15f0f21fd63610.jpg

  • Like 1

Share this post


Link to post
Share on other sites

A while back probably about 2015 sometime I was looking at a magazine which had a picture of a W 71 dual tandem light blue in color setting in a field. I think it was out west maybe Utah. The only reason I remember this is at the time I never knew what a W 71 was. So that is one more that survived. 

Share this post


Link to post
Share on other sites
19 hours ago, AZB755V8 said:

Hi Vlad,

I agree with you almost all the time but. The frame rails are the same on the LT and W frames. This is a photo of my LTL frame and the spread is obvious towards the front.

 

Whoops!.. Many thanks for the reference picture. For some reason I thought LT rails were of the same shape as a common L-model had with just cab mounts etc moved backwards. Now I clearly see I was wrong. Probably I never crawled under an LT chassis since it's off a focus of my interest. One of the greatest looking trucks no doubt but my personal preference is an all Mack drivetrain. LT's with 707 were described as produced in some quantities but I don't remember ever hearing of any survivors.

Share this post


Link to post
Share on other sites
15 minutes ago, Vladislav said:

Whoops!.. Many thanks for the reference picture. For some reason I thought LT rails were of the same shape as a common L-model had with just cab mounts etc moved backwards. Now I clearly see I was wrong. Probably I never crawled under an LT chassis since it's off a focus of my interest. One of the greatest looking trucks no doubt but my personal preference is an all Mack drivetrain. LT's with 707 were described as produced in some quantities but I don't remember ever hearing of any survivors.

I bet they weren't very popular, that engine would've been swimming under that hood with the space. Any 707 can fit under the hood of my standard L, and the LTs were designed to accommodate bigger engines, hence the spread frame rails at the front. Using the LT's frame rails on the W allowed for a really low doghouse because the engines could sit deeper down in the frame rails, pretty interesting that it wasn't a more popular design... in my opinion atleast!

Edited by CaptainCrutch
  • Like 1

Share this post


Link to post
Share on other sites

There were a lot of LT's up here on Vancouver Island of S&S trucking with HALL-SCOTT engines chassis numbers 1011 - 1017 and quite a few on the lower mainland with 707 engines chassis numbers lt-2d1224 & lt-2d1225. These were log trucks with off high way suspentions 11 & 12 foot bunks and about 25 ton trailers.Pictures show them to be way over loaded for size of truck. 

  • Like 1

Share this post


Link to post
Share on other sites
Just now, BOB DINGSDALE said:

There were a lot of LT's up here on Vancouver Island of S&S trucking with HALL-SCOTT engines chassis numbers 1011 - 1017 and quite a few on the lower mainland with 707 engines chassis numbers lt-2d1224 & lt-2d1225. These were log trucks with off high way suspentions 11 & 12 foot bunks and about 25 ton trailers.Pictures show them to be way over loaded for size of truck. 

Sounds like the right application for the way over built 707 motor...

Share this post


Link to post
Share on other sites
On 2/19/2020 at 10:49 AM, Vladislav said:

Whoops!.. Many thanks for the reference picture. For some reason I thought LT rails were of the same shape as a common L-model had with just cab mounts etc moved backwards. Now I clearly see I was wrong. Probably I never crawled under an LT chassis since it's off a focus of my interest. One of the greatest looking trucks no doubt but my personal preference is an all Mack drivetrain. LT's with 707 were described as produced in some quantities but I don't remember ever hearing of any survivors.

If an all Mack drivetrain was available when a lot of the LT's were built there would be a few around. Mack did't start making their own engine until late in LT production. I don't know of one factory built LT with an all Mack drivetrain. Only thing offered was a Hall Scott gas engine and the Cummins Diesel. Mack trans and Brownie aux box, Mack rears. The W-71 was only offered with a Cummins. 

Any photo's of a 707 in an LT around? Got to look small in there.

Edited by AZB755V8

Share this post


Link to post
Share on other sites
19 hours ago, AZB755V8 said:

If an all Mack drivetrain was available when a lot of the LT's were built there would be a few around. Mack did't start making their own engine until late in LT production. I don't know of one factory built LT with an all Mack drivetrain. Only thing offered was a Hall Scott gas engine and the Cummins Diesel. Mack trans and Brownie aux box, Mack rears. The W-71 was only offered with a Cummins. 

Any photo's of a 707 in an LT around? Got to look small in there.

The only source of info on LT with Mack engines is a text in a green Mack book which covers L-model history. Although it mentioned in the text the book conteins none of the LT pics representing Mack engine installed. Also there's sence indeed of no need of long LT bonnet for installing Mack engine as long as LF/LH?LJ could be used for such reason. So probably only a case might be if someone wanted LT (or aluminium LTL?) chassis or just the look.

Another point I didn't understand your phrase of Mack not making their own engine until late in LT production. We know Mack made as early engines as for AC Bulldog and earlier but particulary Mack introduced Thermodyne OHV serie of engines in November of 1938 including EY which was 707.

IMG_20200221_190212.jpg

IMG_20200221_190336.jpg

  • Like 1

Share this post


Link to post
Share on other sites

Let me rephrase the engine issue. Mack did not start making Diesel engines until the end of the LT production run. W-71's only had Cummins diesel power. I only have diesel powered Macks. Of course Mack made the AC engines and GAS Thermodyne's but we are talking about a W-71 and LT's. Silly me not taking into account all the other Mack models made. Still I would like to see a photo of a 707 in an LT, surly not may made and non known to exist today? Wounder why?

Share this post


Link to post
Share on other sites
20 hours ago, AZB755V8 said:

Let me rephrase the engine issue. Mack did not start making Diesel engines until the end of the LT production run. W-71's only had Cummins diesel power. I only have diesel powered Macks. Of course Mack made the AC engines and GAS Thermodyne's but we are talking about a W-71 and LT's. Silly me not taking into account all the other Mack models made. Still I would like to see a photo of a 707 in an LT, surly not may made and non known to exist today? Wounder why?

Mack introduced their first own diesel together with other Thermodyne engines - 519 c.i. ED Lanova in November of 1938. Interesting fact they offered gasser in 3 displacements of 510, 673 and 707 but the only Diesel was in the smallest block. In fact those gassers and the diesel were very similar in design having the most of the block as the same casting, same crankshaft, oil pan etc. But seemed Mack tried to go a safer track with diesel offering it of relatively low HP and with thicker cylinder walls. In fact the next generation was END-672 which also used Lanova combustion chamber but was made in 673 c.i. block. Not ready to say the year of beginning of the production, probably 1945 or 46.

The fact of LT with Mack gasser existance seems as one really interesting matter no doubt. Might worth bothering Mack museum if no other facts show up.

Edited by Vladislav
  • Like 1

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.


×
×
  • Create New...