Fitting tall guys in Cab 11/12's

[Tony Wheeler]

Originally Posted by svdwal

my legs are to long to reach the clutch pedal

Or to put it more precisely Sjoerd - your lower leg is too long to fit between the steering wheel and the clutch pedal. I know because I have the same problem, I'm 192 cm and there's no way I can operate the clutch on a Cab 12, especially with my Size 13 boots!

I used to assume this meant I could never drive a Cab 12, which was no great problem because I had no plans to own one. Recently however I saved one from the scrappy, and pretty soon I started having ideas about restoring it one day. Of course there's not much point if I can never drive it, so I started investigating the possibility. Sure enough it turns out there's an easy fix - raise the steering wheel. Seems obvious when you think about, but no one ever does! We just accept these problems as a fact of life with Cab 12s. However it should be noted there was a field modification kit issued for this exact purpose.

There's more to the story of course but I won't bore you with details here. Suffice it to say I've raised the steering wheel now and I can operate the clutch quite comfortably. It's only temporary but it could easily be made permanent, by the same basic method employed in the field modification kit. It could even be improved upon without detracting from originality.

I guess what I'm saying here is that we don't always have to accept Cab 12 deficiencies as inevitable. In light of these possibilities Sjoerd you may want to reconsider the F8. It's a lot easier to reposition the steering wheel than rebuild your garage!

[Hanno Spoelstra]

Originally Posted by Tony Wheeler

However it should be noted there was a field modification kit issued for this exact purpose.

There's more to the story of course but I won't bore you with details here. Suffice it to say I've raised the steering wheel now and I can operate the clutch quite comfortably. It's only temporary but it could easily be made permanent, by the same basic method employed in the field modification kit. It could even be improved upon without detracting from originality.

Tony,

Interesting to read about this field modification kit! Please do bore us with details here, as it's all part of the fascinating history of the CMP.

Thanks!
Hanno

[Bob Carriere]

Hi Tony

How did you do it exactly?? did you shorthen the bracket that attaches to the cowling....

Was there a particular service bulletin that addressed that modification.

I have lowered my seat and moved it as far back as I could on my cab 11... it does give me more room for clutching......

As to the boot size... unless I am wearing track shoes, my steel toe capped boots are just plain to big.

Pictures of you dash installation would be nice.

Thanks

Bob C

[svdwal]

Sounds very interesting, please share some more details.
Also i would like to see a picture of how you've solved this issue.

Indeed my lower leg is a bit long, which gave me problems in reaching the clutch.
The steering wheel is to low and the handbrake is blocking my leg.
How much extra room did the modification gives you?

Looking forward to you reply, as i am still have a strong feeling for the F8.

Regards,

Sjoerd

[Alex van de Wetering]

I agree, please tell us more Tony! I am likely to encounter the same trouble with my C8 cab 11.

I did see a C15 before that had the engine cover corner closest to the pedals slightly bent towards the engine by use of a wooden spacer.....this gave the owner just that more room for his foot.

Alex

[Tony Wheeler]

I'll post some details on steering mods shortly but first I'd like to specify the precise problem so we're all on the same page.

The critical dimension for tall people, which for convenience I shall refer to as dX, is the distance between the clutch pedal and the bottom of the steering wheel. That's because there's no room to swing your knee to the left, so your leg must remain under the steering wheel when operating the clutch. Therefore if your lower leg happens to be longer than dX, you cannot drive a Cab 12. No amount of seat adjustment can alter dX, and only an osteotomy can alter your lower leg length.

Conversely there's no problem operating the brake, because there's room to swing your right knee against the door to get it out from under the steering wheel.

Hence there are two possible solutions:

1. Create more room to swing your knee to the left.
2. Increase dX.

Solution 1 means relocating the handbrake, which is the first object blocking your left leg, but immediately adjacent to that is the engine cover, so that too would require modification, which would inevitably involve the dashboard as well. These are extensive and challenging modifications which would impact drastically on originality, and furthermore they're entirely unnecessary. Why do I say this? Because I'm 192cm tall and I can drive a Cab 13 comfortably with my legs under the steering wheel. Sure, there's room to swing my knees out on both sides, but the point is I don't NEED to. That's because dX is 40mm longer on the Cab 13, owing to the new pedal levers.

Thus we have confirmation of Solution 2, and we can now quantify it: Increase dX by 40mm. There would appear to be only two realistic methods:

A. Raise the steering column. This means shortening the steering column bracket, which alters the steering column angle slightly, requiring a shim between the rear steering box mount and the chassis.

B. Lengthen the steering column. Not a job for amateurs like me, but offering the tidiest solution which best preserves originality. Advantageous for those preferring to send the unit out and pay someone else to do the work.

Either of these methods will achieve 40mm dX increase, and considerably more if preferred, so there's clearly no obstacle for tall drivers wishing to own Cab 12s.

I should state here that my 40mm spec is based solely on my own Cab 12, so it needs to be confirmed on a few others. I also have questions about the steering column bracket found on my vehicle.

[Keith Webb]

Tony can you post a pic of the steering column bracket in case it's different from the standard? The Rover with the dash with hard angles on it looks like a standard cab 12 one but with about a 2" block to lower it, and the one with the rounded edge dash looks more like a Chev cab 12 bracket.

[Tony Wheeler]

Originally Posted by Bob Carriere

I have lowered my seat and moved it as far back as I could on my cab 11... it does give me more room for clutching.....As to the boot size... unless I am wearing track shoes, my steel toe capped boots are just plain to big.

Bob, how tall are you, and have you removed all the wooden seat risers on your vehicle? Ford parts list indicates there was only ONE wooden seat riser originally, however there was a field mod kit issued to RAISE the seat by using TWO wooden seat risers. This kit included longer 2 1/4" bolts to replace the original 1 5/8" bolts, which indicates the original seat risers were only 5/8" thick. However, in post war commercial use they may have acquired any thickness of wood, and I notice some restorers use very thick wood to replace the old rotted out stuff.

In hindsight I realize this is why I was unable to operate the clutch on the Cab 12 three years ago - I've checked some photos and the seat risers are far too thick on that vehicle. Even my own Cab 12 has much thicker seat risers than original, however I'm able to operate the clutch on mine, even with the steering bracket in the standard position, because the seat risers are not as thick as the other Cab 12. It's far from comfortable, but I could certainly drive the vehicle if it were running.

This is undoubtedly Sjoerd's problem too, the restored F8 most likely has much thicker seat risers than original.

[Phil Waterman]

Hi All

My Pattern 12 had one inch and two inch blocks on the drivers side and one inch blocks on the passenger side. Take a look at the metal channel the seat rails sit on there is another 1 1/4 to 1 1/2 that could be removed. But I'm not sure if it would actually make much difference to the leg length issue. Lower the seat also might make the problem of how much you have to be able to fold your legs up more of an issue.

Driving the truck with out the cab top definitely makes easier for tall or heavier people to get in and out of the passenger seat as you can just step up into the truck and then sit down. No top is not much help on the drivers side though as you have to work your legs in under the steering wheel.

I'm a bit surprised that in this discussion the point that people are in general taller and heavier than they were back in 1940.

Cheers Phil

[Private_collector]

Possibly in the military of WWII, the CMP dimensions 'selected' its driver, whereas now we want it the other way around. With height, comes limitations. RAAF wouldn't have me as pilot. Too tall for what I wanted to fly, yet cessna 152 fits well! My Father drove both cab 12s & 13s, and he was over 6' tall. At that time he had the physique of a greyhound, so sheer bulk wasn't problem either. Thats all that good army living for ya.

I remember hearing Dad say several times, there were no fat guys in the army. Guess he really meant the lower ranks, hey. Thomas Blamey, are you hearing this....down there?

[lynx42]

Originally Posted by Private_collector

Thomas Blamey, are you hearing this....down there?

HA!HA!HA!! Tony well done. He certainly was not one of the best.

Regards Rick.

[Alex van de Wetering]

My C8 cab11 has the same blocks as Phil's on the drivers side. (see pics attached). The thicker block even has a part number printed on it, which seems to read "5804113", but I can't find it in the parts list.

My co-drivers seat didn't have any wooden blocks, but a plate in stead which tilted the seat a little bit backwards.

Alex

[Bob Carriere]

Good evening everyone.

Truth of the matter is that the average WWII soldier had survived a depression and his overall "growth" had been affected ... so say a typical Canuck, even if coming from a farm, was probably in his late teens and about 150 pounds full clothed. He will no doubt get bigger but that is a post war issue.

I am 6 foot 2 1/2 inches and weight as much as 247 at one time...... now working hard at staying around 214 with a waist that went from 44+ down to 40 inches....and maybe shrank 3/4 of an inch.

Sitting in my cab 11 was a tight fit but can now squeeze my but a little better as the belly allows me to bend my legs better. My truck came with NO wooden spacer on the driver's side and a one inch rotten hard wood on the passenger side...

See pictures of the original condition ......

The foot well space is so small that I cannot drive the truck with safety boots with hard steel toe caps..... I need dress shoes or running shoes.
But I do have sufficient space to raise my left leg and double shift the clutch.

Howeever, I sat in the driver's seat of a CGT owned by the boys in Petrolia.... an amazing restoration previsouly features in MLU...... well in the gun tractor the front seat is hellish.... you actually have to step in a foot well and although I was 247 at the time, I would not fare any better today.
As I sat erect in the driver's eat the top pf my left leg was touching not pressing on the bottom of the steering wheel. No way that I could even try to drive it.

NOw my neighbour across the street is an old post war gunner who trained in the early 50's when the old CMP cgt where still in use.. when I explained my experienced he pointed out that it was regualr practice in his days to remove the reat cushion for the tall guys anf give them a bunk woolen blanket to sit on....OUCH!!!!

Now my cab 11 is not fully assembled yet and the set is bolted to the floor pan using a 3x 3 pine block of about the same height as the steel sliders with out any wooden spacer...... so my dimensions will be the same.

As anybody noticed the modification done to the cab 12...... just behind the seats back..... at the belt line where the top portion bolts on to the bttom section.......all the cab 12 I have seen have the angle iron relieved, section cut out by about 3/4 inch allowing the seat back upper most pipe to travel slightly more to the rear......it seems that every little bit helps.

The tight cab may also explain the propensity of soldiers to loose the doors in North Africa.... and the hood/bonnet if you had any maintenance to do....

I have riden in Phil's cab 12 and not having a top does make it like walking in to an open carriage...... much more pleasant.

Early parade square pictures in Canada do show the door of early cab 11 fully opened back to the cargo box...and may have been driven like that " a la jeep style"... which probably made a few sergeant angry when dents showed up in the prestine war machines..... so they retro fitted restraining straps which became standard on the cab 12.

Now the question of raising the steering wheel is interesting but from my rough measurements the most you would gain is one inch maybe 30mm at which point unsufficient clearance with the windsheild/windscreen would mean squeezing your knuckles.... no cheating allowed the cab 11 windows did not open forward.

So we have to suck it up... wear narrow shoes..... and expect back apin and sore bottoms if you intend to tour North America..... I had big plans of long re-enactment trips.... now I will settle to trailering the little beast whiel driving my air conditioned pick up to the site. Rets assured it will see dirt and mud but not about to re-enact driving from Ottawa to Gagetown NB

While on the topic of limited foot well area....... as anyone noticeds that soemn cab 12 actually have an even tighter foot well.... and that the inner fender is knotched to fit further inside and around the spring shackles....?
Not sure what the explanation is but the floor plate is narrower and the inner fender more rounded. I have one such example and it's the only one I have seen.

As usual, I will eagerly await comments and the wisdoms of others..... ain't it great!!!!

Bob C.