Fitting tall guys in Cab 11/12's

[Tony Wheeler]

Here are some pics of the steering column bracket, which as Keith says is standard Cab 12 but with a spacer block. Interestingly it's solid copper. Obviously it's a Rover part, designed to lower the steering wheel inside the low-roofed hull, but it got me thinking: What if I RAISE the steering wheel? Would I be able to drive a Cab 12 after all? Naturally I set to with some excitement and rigged up the steering column a bit higher, and sure enough it worked! Pic 5 shows the steering column raised 20mm at the bracket, which raises the steering wheel approx 25mm. Doesn't sound like much but it makes a world of difference to me - it means I can own a Cab 12!

In reality this experiment means that ANYONE can own a Cab 12, because you can shorten that bracket a LOT more than 20mm. However, the FIRST thing you need to do when considering a Cab 12 is check the seat. As Phil said earlier: "If you are really tall and have a Pat 12 you may want to remove one or both of the wooden seat spacers to lower the seat." Phil is absolutely right, the seat height makes a HUGE difference. There's no seat cushion on my Cab 12 so I'm sitting on the bare metal seat pan when conducting these experiments, so they're not valid for normal driving. However there's a 30mm wooden spacer under the seat frame, so if I remove that I can have a 50-60mm high density rubber seat cushion, which should compress down to 30mm under my bony arse, thus replicating the conditions of the experiment. In fact if I want to I can easily modify the seat mounts and gain a further 45mm, which would allow me to use the much thicker sprung CMP seat cushion. Now we're REALLY talking luxury!

Sjoerd, what this means for you is that if the F8 has wooden spacers under the seat frame, which I imagine it does, there's no way you could have operated the clutch. You may want to contact the seller and ask him to measure them, because that could be the solution for you. It may not be necessary to shorten the steering column bracket after all, at least not immediately anyway. Removing the wooden spacers may be enough to get you on the road.

Another point to note is that you can set the clutch pedal 20mm depressed, by means of a thick rubber stop behind the toe plate. Again it doesn't sound like much, but it makes a BIG difference for me. Obviously it would reduce full pedal travel, but there's 200mm travel on mine so we're only talking 10% reduction here. There's always a bit of spare travel on a properly adjusted clutch.

Anyway there are 3 areas for improvement - seat, clutch pedal, steering wheel. Cumulatively they offer huge potential for improved comfort in the Cab 11/12, and for tall people they are the avenue to ownership.

[Hanno Spoelstra]

Originally Posted by Tony Wheeler

Here are some pics of the steering column bracket, which as Keith says is standard Cab 12 but with a spacer block. Interestingly it's solid copper. Obviously it's a Rover part, designed to lower the steering wheel inside the low-roofed hull, but it got me thinking: What if I RAISE the steering wheel? Would I be able to drive a Cab 12 after all? Naturally I set to with some excitement and rigged up the steering column a bit higher, and sure enough it worked! Pic 5 shows the steering column raised 20mm at the bracket, which raises the steering wheel approx 25mm. Doesn't sound like much but it makes a world of difference to me - it means I can own a Cab 12!

Tony, thank for the insight and pictures. But the first step is normally not necessary on Cab 11/12's, as the standard steering column is fitted to the cab without the spacer as used on the Rover.

Could you tell us more about the field modification kit you mentioned earlier? I am interested to learn if the cramped cab - by todays standards - was enough of a problem to design a modification during WW2. From what I can see, it would involve fitting another shorter or cut-down original bracket.

Thanks,
Hanno

[Tony Wheeler]

Originally Posted by Hanno Spoelstra

Tony, thank for the insight and pictures. But the first step is normally not necessary on Cab 11/12's, as the standard steering column is fitted to the cab without the spacer as used on the Rover.

Yes Hanno, I only included that photo to show the normal Cab 12 position, I didn't expect to be able to operate the clutch myself. Interestingly though I found it a lot better than the Cab 12 I tried to drive three years ago, which makes me believe the seat is lower in my vehicle. I don't know because there are no Cab 12s nearby to inspect, so I'd like to see some photos of other Cab 12 seat spacers. Or even just the measurements, mine is 30mm thick as mentioned, but it's a single spacer, whereas Phil spoke of there being two spacers.

I'll post some details on the field mod kits shortly, I don't fully understand them but they seem to be along the same lines as my own experiments.

[Tony Wheeler]

This is all I have on the field mod kits, I only found it recently and I haven't quite figured it out. Also it applies to a very early type of steering gear which I didn't even know existed. However they appear to be the same mods I've been talking about - steering height, driver's seat height, and the shim under the steering box. Clearly there was a problem for drivers, because two of the kits address those areas specifically. The other two kits are conversion kits to the later type steering gear, which is what we're dealing with now. Presumably this was an improvement for most drivers, but not enough for tall drivers.

Anyway, as I said earlier, it proves we don't have to accept Cab 11/12 problems as a fact of life. These kits would not have been designed and issued if they didn't work, and there's no reason we can't design a kit for the later type steering gear.

[Tony Wheeler]

Originally Posted by Tony Wheeler

there's no reason we can't design a kit for the later type steering gear.

Which reminds me - a simple kit could be designed to lengthen the steering column by 40mm, which is the best solution anyway. I know how I'd do it but I'll leave it to the engineers on MLU to give their thoughts.