Welcome to irv2.
Here is a Brochure
and 2001 Owners Guide
for you assuming you have a gas coach.
HWH 325 JACKS
As for your jacks you need to lift each pair of jacks together on the low side rail, yellow light, together by that I mean both jacks on same chassis rail front and rear.
When you lift each chassis rail you will not twist the chassis frame.
You only need to observe the red lights and you will see the front and rear red light come on together on same side of the control panel.
Once you have both rails lifted and your on a level pad the yellow light will go off.
You also need to lube the shiny pistons with WD-40, recommended by HWH, and wipe them done a few times to clean the pistons.
If the jacks do not return fully you may need new springs which can be discussed later.
The HWH reservoir needs to be checked for fluid that will show level on the shaft of the bell vent on top of reservoir. Fluid level needs to be between the two lines of the shaft with all the jacks fully in stored position.
You do not want to over extend the jacks and lift rear tires off ground and you can also flex the frame and bind your entry door in its frame.
Always level coach with the chassis rails first may only have to use front and rear jack pairs to lift slightly.
If you have a jack that does not store use a 2x4 x 8' to lift the jack up with no part of shiny piston showing or you will get a alarm when starting the engine.
In my signature below are links to more info for your Newmar.
Congratulations on your coach and welcome to the Newmar family.
Enjoy the forums and come a join us in the Newmar forum.