If you back the caravan up the ramps with the car then it compresses the hitch to which the overrun device kicks in which means that the caravan handbake doesn't function. You always have to PULL the caravan up the ramps in order for the handbrake to work effectively otherwise if the caravan wheels are not chocked it will roll off the ramps.
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We've got a twin axle with a Powrtouch AWD, on the odd occasion when needing to level it we've approached the plank at a slight angle so that when the opposite wheels get more traction it starts to twist level if that makes sense!
I use the motor mover to get it to the ramp then keep going straight, if it twists I then move the non ramp wheel back a bit to straighten it. My Powertouch mover gives me separate control of each wheel.
------------- We camped for years. In 2019 we bought an Elddis Avante 454. We like it as it is short (6.9m) and fits in our driveway and has a fixed bed.
We had 127 nights away in the caravan in 2023.
I've had difficulties getting our van onto one ramp, on a gravelled driveway using a mover. The van started, best way I can describe it, is turning, rather than going up the ramp. I solved it by lining up the van with the ramp, then lowering the jockey wheel until it locks, (allowing no sideways movement of the jockey wheel), this has helped an awful lot. Once the van is in position on the ramp, the jockey wheel can be highered again to level off the van.
This is also a useful tip when operating the motor mover. When moving the caravan forward, look at the direction of the jockey wheel tyre as it swivels on a castor so the caravan will always follow it's route which performs exactly the same as a shopping trolley. If you do this then you can respond with the hand control instantly and the caravan will manouvre as required. More so when going up ramps too as you tend to watch the road wheels rather than the direction of the jockey wheel. It's an easy way to direct the caravan but once you get the idea you can master it perfectly.
Surely it's just because one wheel has more resistance than the other...the one that can turn more freely does just that.
So twist the van slightly first, then chock the non-ramp side wheel...
I have the same experience but just compensate by pulling on the caravan handle of the side with the ramp.
Movers go straight forward/back by putting the same current into each motor. But if one wheel is on the flat while the other has to move your 'van up a slope, the wheel on a gradient has more work to do so it will turn slower than the one on the flat.
If you don't want to help the caravan stay straight manually, then you can, as others say, stop and realign, taking the 'van up gradually.
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