Washer Maytag water pours out bottom of washer water leaks out of back plastic hose attachment when draining. How do we open top of machine?

Is it the tub to pump or pump to drain section?

You have 3 areas to check. Drain hose, water pump and hot/cold water valves. Any of those 3 areas can be the cause. Most often leaks are caused by loose hoses, but neptunes use a plastic water pump that can clog and lose bearing water seals as well. Try the easy options first, then if those solutions don't point to the cause, remove the front cover and check the water pump for moisture.

Common cause is leak in drain hose as hose outlet must be above water level and if damaged water will run out straight away ( syphon ) but tip it up ( carefully ) and check
Please - Please be carefull as water and electric are not friends

hello. i can help you. unfortunately, your problem has numerous possible causes.
Your washer can develop several types of leaks. You can track down a leak based on when it occurs:

During fill only
During drain and spin only
All the time
During fill only If the washer leaks only during the fill cycle, check these:

• Air-gap device -The air gap is a small device found on most washers that prevents the wash water from being siphoned into the household water supply. It's located either mid-way along or at the end of the black rubber hose that comes from the water-inlet valve. Often it's made of translucent plastic. If one of the air-gap components deforms or cracks, you may need to replace it.
  
  
• The tube -There's a rubber tube that runs between the water-inlet valve and either the air-gap or the inlet spout. If it cracks or breaks, it can cause a leak.
  
  
• Inlet spout -Most washers have a plastic spout near the top of the main clothes tub that directs the water into the tub. If the spout cracks or breaks free of its mounting, it can cause a leak.
  
  

During drain and spin only A washer that leaks only during the spin cycle often has a leak in the main drain hose. Inspect the entire hose and correct any problem you find. Alternatively, the steel or plastic outer tubs can rust, split, or be punctured. This may be most visible during large loads and high water levels. If this happens, you may have to replace the entire outer tub--but that may not be an economical repair to make. Consult a qualified appliance repair technician for further details.

All the time If the washer leaks all the time, check these:

• Hot and cold water fill hoses - Check the hot and cold water hoses from the household plumbing. If either hose is leaking, tighten it or replace it, as appropriate.
  
  
• Main tub seal - The main tub seal is located between the transmission and the outer tub. It's the primary water seal in the outer tub for the transmission-shaft entry point. If this seal leaks, you can see the leak by opening up the machine's main access panel while the machine is full of water with a small amount of detergent in it. The leak appears at the underside of the outer tub, at or near the center. This seal is difficult to replace. You probably should call a qualified appliance repair technician.
  
  
• Pump - If the pump leaks, you can probably spot the leak when the tub is full of water. The pump has two or more black rubber or plastic hoses attached to it and usually has a drive belt that spins the pump. If the pump is leaking, you need to replace it.
  
  
• Outer tub - Over time, the steel or plastic outer tubs can rust, split, or be punctured. If this happens, you may have to replace the entire outer tub--but that may not be an economical repair to make. Consult a qualified appliance repair technician for further details.
  

lift the top up on the washer and see if the fill hose is crack or broke,hose on right side

this is either the front seal that goes from the outer tub to the front of the washer or a hole in the outer tub itself or one of the hoses underneath the seal and the hoses are easiest to check you can take a cup of water and slowly pour it into the front seal. take care not to overfill it to where it spills into the tub and see if you are getting water on your floor from that. the hoses tip the washer up onto its back and look at them from the bottom for any cracking etc. the tub itself can only rust out on some of the neptune models or on others is plastic and can get punctured. just have to look for damage with a light and a mirror.

Check your drain, drain hose (make sure the clamp is tight) and check the pump to make sure that all hoses are attached properly

Need to check drain pump and its hose connections. If its not from the drum seal then that's usually where the leaks occur.

the drain hose tear or broken/ clamp detached / need to replace.