Robinson Helitow Technical Help

[bvgs]

Hi, I have had a Robinson Helitow for years now but suddenly it has stopped lifting. It still drives back and forward and on pressing the lift button the locking solenoid click and does its job but it just doesn't go up. I'm not sure of the mechanics of the device and wondered if anyone could shine a light?

Thanks.

[HCGB]

Not really, but if it is terminal, have a look at the Jara Aviation Helimover which is much more robust

[chalmondleigh]

I have seen a number of RHC tow karts gathering dust at the back of hangars. Bought a Jara Helimover seven years ago and still going strong. They are UK manufactured and more manoeuvrable.

[bvgs]

Don't disagree with that but mine is 12 years old and this is the only time I've had a problem so if anyone can help I'd really appreciate it. Thanks

[TiPwEiGhT]

Ah, it's because it's 12 years old, needs an overhaul.

Never used the RHC one, just Jara. But I guess HeliAir or Sloanes might be able off some advice.

[Figure Of Merit]

It has been a few years since I used a heli tow. The company I now work for finds the human version cheaper to employ.

When I did use one we had a similar problem. If I remember correctly there is a micro switch that detects that the socket is correctly engaged on the helicopter's towing ball. The up/down motor is inhibited by this micro switch. The locking solenoid still clicks but the arm will not move.

Ours used to need some grease to keep it working properly. It's the switch shown next to the solenoid (wires annotated 913/951) on the wiring diagram for revisions A to E. The maintenance manual is freely downloadable from the RHC site.

Looks like they changed the design from revision K onwards to solve this particular problem.

Hope this helps