Newmar uses several different motors and transmissions in their slides. This H350 is used in the double motor kitchen slide of the Dutch Stars. I've broken that motor twice. Both times, a tooth broke off of the main gear, causing a dead spot. The broken gear is hard to see unless you move the red grease out of the way.
The first motor was replaced under warranty. About a year later, the same one (front motor) broke again. The motor has a small round attachment on the end that syncs the two motors. I thought that the issue, so I called Klauber. I wasn't happy and let Klauber know that I wasn't happy with their product how much Newmar was marking up their motor, about $900.00. The tech was surprised. He put me on hold and spoke with an engineer. When he returned, he told me that the engineer thought it was probably a bad controller since the same motor broke twice. He said the motor was probably receiving more amperage than the rear, making it do all the work.
I ordered two new motors and the controller. I replaced both motors and kept the one good one as a spare. I installed the controller and then reset the limits. I would advise anyone who replaces one of these motors to reset the controller....it's very easy. I made sure the slide stopped at both the in and out position and wasn't pushed any further in or out than needed. The controller is screwed to the ceiling of the bay, about the center of the slide. It can be hard to find as they put it between two frame rails that are only about 6" apart. You have to be looking up to see it.
The FWS runs off of the HWH pump, so voltage isn't as critical, however the kitchen slide runs off of 12 volts. Consequently, I always have the engine running when I extend the kitchen slide. Knock on wood, good slide performance since I replaced the motor.
Lastly, I've become pretty quick at replacing these motors.
I found that the motor is fairly easy to remove, but much more difficult to reinstall and align the four bolts. The motor is mounted in a metal cage, just slightly bigger than the motor. It's easier to remove the cage or at least loosen it and then remove or reinstall the motor.