Thread: rr air operated cdl lever to d2??

I believe the RRC CDL is vacum actuated and the D2 is a mechanical bolt so I would guess at not.

I'm not familiar with exactly how the actuator on the RR works (even though I used to own one). But if it is a vaccuum actuator, I don't see any reason in principle why not. I always thought that the button in my old RR 2 door was electric - so the control must have been electric over vaccuum ????

After all, the D2 actuator is simply a means of pushing / pulling a lever which turns a bolt. There is no reason why a properly set up vaccuum actuator could not do the same things - there are plenty of examples of vaccuum actuators being used in similar duties. I would imagine that the vaccuum would be used to push or pull the lever one way to engage the CDL, with a spring returning the lever to its original position once the vaccuum was no longer applied - same basic principle as how a brake booster works, only with less effort required.

Similarly, a compressed air actuator could also be set up quite easily for the same duty by someone who knew what they were doing - but would require a constant air supply. It wouldn't be difficult to set up a double action air actuator to do this, eliminating the requirement for a spring return and providing a more positive and reliable action - but the plumbing and control valve into the cabin might be a bit messy.

I dont know the RR system but any air or electric activation would have to work - stock push pull...however for me it was KISS principal when I fitted fine. A t lever push pull out of the transmission tunnel - only moves about 1.5cm. And irrespective of the light on the dash you know when she is on.

Cheers

Originally Posted by wozapinin

forgive me for asking a stupid question, but I haven't heard any diferent. Can the push down vaccum operated cdl activator, out of a classic range rover, be used/modified to fit our d2's???

There were two aftermarket CDL actuaters on the market - one driven by an electric window winder and the other by a solenoid switch - electric ones never lasted long after the motors had been submerged a few times. Have not heard about the solenoid actuated ones and how they faired over time.

I would stick with a mechanical linkage that whilst not as fancy is certainly less prone to failure.

Cheers,

Franz
2004 Discovery 2a Classic Town Pack with mods

Originally Posted by BMKal

I'm not familiar with exactly how the actuator on the RR works (even though I used to own one). But if it is a vaccuum actuator, I don't see any reason in principle why not. I always thought that the button in my old RR 2 door was electric - so the control must have been electric over vaccuum ????

After all, the D2 actuator is simply a means of pushing / pulling a lever which turns a bolt. There is no reason why a properly set up vaccuum actuator could not do the same things - there are plenty of examples of vaccuum actuators being used in similar duties. I would imagine that the vaccuum would be used to push or pull the lever one way to engage the CDL, with a spring returning the lever to its original position once the vaccuum was no longer applied - same basic principle as how a brake booster works, only with less effort required.

Similarly, a compressed air actuator could also be set up quite easily for the same duty by someone who knew what they were doing - but would require a constant air supply. It wouldn't be difficult to set up a double action air actuator to do this, eliminating the requirement for a spring return and providing a more positive and reliable action - but the plumbing and control valve into the cabin might be a bit messy.

maybe we can use the sls air compressor for the constant air supply. We use air actuators on valves at work. They use an electric switch to allow the air to the actuator which opens the valve. The valves are sprung to shut so when the air is shut off the valve shuts. Bulky units but there must be smaller examples around...food for thought.

Originally Posted by wozapinin

maybe we can use the sls air compressor for the constant air supply. We use air actuators on valves at work. They use an electric switch to allow the air to the actuator which opens the valve. The valves are sprung to shut so when the air is shut off the valve shuts. Bulky units but there must be smaller examples around...food for thought.

There's plenty of small pneumatic actuators out there that would do the job. We use small double action ones about the size of one of those fat "UHU" glue sticks to operate the cutters on small slurry samplers in process streams in mineral process plants - they're a pretty robust unit and have plenty of grunt, and only a fairly short stroke which is all you'd need to turn a bolt through 90 degrees - and I've seen smaller ones than the ones that we have used.

I hadn't thought about using SLS air - probably because my Disco doesn't have SLS and I didn't click that there was a compressor there capable of supplying the air that you'd need. Definitely a good little project for some inventive type of person.

Well....sniff....tear in eye.....it helps if you actually have a CDL

Yeah you guessed I've got an '02 model choke, sniffle .......

Originally Posted by Catmatt

Well....sniff....tear in eye.....it helps if you actually have a CDL

Yeah you guessed I've got an '02 model choke, sniffle .......

Me too Catmatt.

I can think of plenty of ways to get a CDL working ....................... if I had one in the first place.

But the '02 without the CDL is not all that bad - I pulled a Landcruiser out of a salt lake last Sunday.