Well,
I decided to pop open the pump/motor compartment on my 919.167240. I
think I found the problem. The "Timing Belt" is broken (Part AC-0815)
was broken. I went to sears online and found out the price is $9.95 for
the replacement. I guess this would explain why despite the motor
turning no pressure would build up in the tank. Anyways, this leads me
to my next question. Is installing the timing belt as simple as running
it through both gears, or is it more than I'm anticipating. Please
advise!!

Thanks!!

Jay