HMMWV ... give generator a squeeze.

A loose generator mount is a big problem, drivers. If it's bouncing around, it won't do its job properly. And continued vibration is just going to loosen it more.

Problem is, it's hard to tell by sight alone whether the mounting bracket bolts are loose.

Here's a quick way to check for loose bolts:

Grab the belts--top and bottom--and give 'em a squeeze. Watch for any movement of the generator or bracket. If you see anything more than a tiny amount of movement, the bolts are loose. Get your mechanic to tighten 'em.

Squeeze belts and watch for generator movement