Originally Posted by stkt
I've got the same coach as you, only on the Spartan chassis. I just had my hydraulic motor replaced due to a failure caused by debris picked up on the interstate. I do not have any, according to Spartan, sensor or other device to control the fan. The hydraulic motor is running continuously, and has been for 18 years. It is a great idea and a retrofit will be explored!
Don't think there is a problem. Enjoy your trip.
I think you would need a different motor for the fan in order to make this work on your coach.
The fan on this chassis is supposed to come on as needed. Gillig confirmed this this afternoon. This fan pushes a HUGE amount of air. You can hear it from the drivers seat.
The people at Gillig are extremely helpful.
There are several parts to this system. dual temp warning switch 51-23245-000 $84.99ea in stock ( the purpose is one to turn the fan on, and at a higher temperature turn the overheating light on on the dash) fan, valve solenoid 12V part# 53-29242-003 (originally 53-29242-001) $243.77ea in stock. Solenoid part# 82-47379-000 $76.85ea in stock. The hydraulic fan motor which I did not ask the price on and I'm sure is sky high.
Gillig provided the wiring diagram.
and in the upper left corner is the circuitry for the fan.
I crawled under the Motor Home this evening (after dark) with a flash light and my phone camera and found the fan, valve solenoid 12V part# 53-29242-003. This thing will be a bear to get to, I hope this is not the problem.
It looks like it sends hydraulic pressure to the hydraulic fan motor to turn it on and off. The small hose going into the side of the fan motor.
I cannot impress on you just how large this multi-bladed fan is and just how much air it moves. The picture does not convey the size of this thing.
Gillig sent the location of the sensor.
The diagram certainly makes it look easy to get to.
I did find it. This is the back side of the piping where the sensor is located, the three wire plug is the plug for the sensor.
This is the other side of the piping you just saw. The sensor is just under the two green wires sort of in the center of the picture.
I have been advised by Gillig that I can drive the motor home with the fan running all the time so I will make this trip and when I return will diagnose and figure out what parts I need to fix this problem.
Your chassis and engine is so much cleaner, I feel ashamed to show these pictures.