Several manuals for Power Gear systems in the " Files " drop box, blue bar next to your " User CP" that may contain the info you need. I've changed pump motors on HWH, and they just fell out, once the through bolts were removed. Could be that the drive end plate is rusted to the pump housing.
But another member who has had to remove one, may have more info.
If you take a minute , and from your " User CP " go to "Edit Signature " on the left side of the page and enter your coach info and click save at the bottom of the page . The info will automatically appear below your posts and you wont have to type it in every time.
As my info does below.