I have a shark robotic vacuum cleaner, it won't dock to charge ? Model number RV720C. 40 14.8V

SOURCE: Shark Euro Pro upright vacuum V1310RS

Most vacuums you either remove the bottom plate, or the top cover comes off. If no screws on the top cover, then turn vac. over and remove the screws on the bottom. Then you should be able to get to the brush roll and belt.

SOURCE: 4210 and 4230 won't charge-new batteries.

I've been having the same problem myself. The charger is apparently built into the roomba main board. From what I've read there are two MOSFETs U2 & U4 that can go out and require replacement to fix the problem. More info here
http://www.robotreviews.com/chat/viewtopic.php?f=1&t=3909

SOURCE: Kenmore Vacuum cleaner #175.3866180 bags and belt

I logged into the Kenmore website, entered the vacuum model no. and found that the bag has been superceeded by 20-50004, which appears to be available only from Kenmore. The belt required is #5270.

SOURCE: Shark Pursuit Euro-pro X vacuum cleaner, 12 amp, upright model

This vacum cleaner is equipped for auto shut off when it gets hot , It gets hot when it gets clogged either the little sponge filter is to dirty or the the round white filter in the dust collecting container.

But if they are both clean then it is clogged in the line probably with lot of carpet fiber, in that case you ned to take the dust container out and possibly the assembly from bottom like when you change the belt, then take of the Handle where the flex hose is attached, then you gonna need a wire hanger bend a long shape close to the shape of the hose line from handle to where it curved around in the bottom opening where it collects the dust behind the spin brush the just stick the hanger from the handle side cause the clog is probably in the lower side then just push the clogs out . Be care full not to puncture the flex hose with hanger. Its probably a good idea to bent the tip of the hanger so that it wont poke hole in the flex hose.

That's what happened with mine I spend hours and hours and days to figure it out. I could have just through it away, but it just kind a pissed me off and the War was on as stubborn as i am, but finally I won and I got the satisfaction of the sweet victory.

Waste lot of time though but it just one of those things. It never messed with me again.

But that is what's wrong with it. Good luck it a good vacum though very power full.

SOURCE: I need a Operate Manual

You can find your manual at the link below. Just click and it will open and you can download/print your manual:

http://www.irobot.com/images/consumer/cs/Roomba-owners-manual.pdf