Rear Suspension Problem

[MarkLawson]

My dealer called me about a problem with a customer's RT. Symptoms are as follows:


Air is added to the rear suspension through the Schrader valve under the saddle. When the RT is started & brake released and put in gear, the air is released from the system until pretty much flat. The air compressor runs, but no air is added.

The airbag has been replaced as well as the ACS Air Release valve. Soapy water has been sprayed everywhere an no leaks have been detected.

Thoughts?

 

[NancysToy]

My dealer called me about a problem with a customer's RT. Symptoms are as follows:


Air is added to the rear suspension through the Schrader valve under the saddle. When the RT is started & brake released and put in gear, the air is released from the system until pretty much flat. The air compressor runs, but no air is added.

The airbag has been replaced as well as the ACS Air Release valve. Soapy water has been sprayed everywhere an no leaks have been detected.

Thoughts?

I would guess the problem lies with the ACS sensor, the link, or the sensor calibration. It is normal for the RTS or LTD with automatic suspension to release or add air when started, brake released, and put in gear. Precharging at the Schrader valve is therefore of no value. The dealer should check the sensor calibration and function, and the link integrity. Changes in setting should be made at the switch, not the Schrader valve. If they want to check, they can charge through the Schrader valve, then verify that the air is being dumped out the release valve when started. They can also add air to the Schrader valve while the Spyder is running/in gear/brake off, and see if it is immediately vented at the release valve. I also believe they can toggle the relase valve manually through BUDS to check operation. It should not leak by when toggled off. There are manual tests outlined in the shop manual if they prefer to test it that way. If they disconnect the release valve wiring and it continues to vent, the valve is bad. A bad replacement valve is not unheard of. If it does not, there is a problem in the signal to the release valve, either from the sensor or a short circuit. The system should never drain below 10 psi unless there is a leak or the sensor calibration/function is faulty.

 

[retired1]

I'm confused. You state that it is an RT, but has a compressor on it. The RT model did not have a compressor on it form the factory. If it is an RTS. it would'nt hurt to check thr position of the ride height adjustment rod. It may have gotten bent or unhooked.:dontknow:

 

[MarkLawson]

Thanks for the help guys. I have forwarded your information to the dealer. They believe the valve is the source of the air leak, although it may not be the cause. They also believe the air compressor may have failed due to constant use, so they've ordered and received a replacement. They will look at your suggestions and will let me know what they find out. BRP Tech Support is also stumped.

 

[MarkLawson]

The RT is fixed. The ACS was the culprit that then caused the compressor to run continually until it burned itself out. They also replaced the solenoid just for good measure.

Thanks everyone for your help.