Undercarriage problem on my Monsoon...

[starion]

I have two 4-5 year old Oasis Monsoons. On one of them, everything else seems to work fine except for the undercarriage blast. It comes on about half of what it should be compared to my other one. I have noticed the pressure drops way low, probably 200 psi.

If I manually turn it on, it runs fine.

I put a new kit in the Dema valve that controls the undercarriage, but that didn't solve anything. It needed replacement anyway, it looked pretty rugged.

Thoughts anyone?

 

[JGinther]

Does the Monsoon wash the undercarriage mid-wash like the typhoon does? If so, there are several things that it could be.

 

[starion]

It does pre-soak, then the bridge stops at the back of the car, and the undercarriage goes for about 10-20 seconds (supposed to anyway)...