How do I open the sprary arm

I would check for a water flow blockage in the pipes.

Dishwasher Spray Arm Not Turning ' Home Guides ' SF Gate

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Remove the lower tray of the dishwasher to freely access the spray arm. ... Although spray arms are directly powered by the water pump for the dishwasher, not all of ...For best use, clean the filter and pump at least a couple of times per year. .... MyRidevisit'Cars-My Ride'navigation-www'4 · Sell Your Carvisit'Cars-Sell Your ...

Dishwasher Cleaning - Top Rack Doesn't Clean - YouTube

? 12:57
https://www.youtube.com/watch?v=75DB9cyPYO0
Feb 7, 2013 - Uploaded by Dogwood Tales
With that said, I'm working on more such videos for household maintenance and repairs and ... In my case the bottom rack of thedishwasher was cleaning well, but the top rack of thedishwasher was not coming out clean at all. In fact ..... How to clean and replace Dishwasher Spray Arms - Duration: 2:07.

How To Fix A Dishwasher Not Cleaning Bottom Or Top Rack ...

Hi, I have an older dishwasher also and recently my wife alsocomplained about it not cleaning right... so me being the man I am tried invain to clean the things... Bought new spray arms online and installed them inminutes...now the thing works like new... However I have also found that if theheating element goes bad then that also can mess things up bad... So I wouldbuy new spray arms, and also check out the heating element to make sure it isworking... Here is a tip that will help you with the online buying...
Dishwasher Spray Arms not Spinning

How to Buy Appliance Parts Online

A bad heating element causes many problems in dishwashers...

Dishwasher Problems The Heating Element not Working

Dishwasher Maintenance

heatman101

yes, the spray arm can be removed and cleaned out.

Also, clean the 3rd (very top spray area) located attached to the top of the dishwasher. You want to make sure this small (1 inch size) piece can spin freely, so water can rinse the upper rack items.

I had the same problem and fixed it by disassembling the lower spray arm and return filter, and cleaning all the junk out.
Most dishwashers have 'risers' that bring the water up to the top sprayer or arm located under the top rack. If the recirculating pump is plugged even a little there won't be enough volume or pressure to get the water up there.
Test this by putting a dry muffin pan in the top rack, flat, and running the dishwasher for a bit. If there is no water on the top (or the bottom) either the top sprayer or the sprayer arm underneath the top rack is not getting enough volume.
To fix this you need to clean out the screen and filter, where the water returns to be recirculated. If you don't have any confidence to remove the parts and clean it out yourself, get an appliance repair person to do the job.

I had the same problem and fixed it by disassembling the lower spray arm and return filter, and cleaning all the junk out.
Most dishwashers have 'risers' that bring the water up to the top sprayer or arm located under the top rack. If the recirculating pump is plugged even a little there won't be enough volume or pressure to get the water up there.
Test this by putting a dry muffin pan in the top rack, flat, and running the dishwasher for a bit. If there is no water on the top (or the bottom) either the top sprayer or the sprayer arm underneath the top rack is not getting enough volume.
To fix this you need to clean out the screen and filter, where the water returns to be recirculated. If you don't have any confidence to remove the parts and clean it out yourself, get an appliance repair person to do the job.

I had the same problem and fixed it by disassembling the lower spray arm and return filter, and cleaning all the junk out.
Most dishwashers have 'risers' that bring the water up to the top sprayer or arm located under the top rack. If the recirculating pump is plugged even a little there won't be enough volume or pressure to get the water up there.
Test this by putting a dry muffin pan in the top rack, flat, and running the dishwasher for a bit. If there is no water on the top (or the bottom) either the top sprayer or the sprayer arm underneath the top rack is not getting enough volume.
To fix this you need to clean out the screen and filter, where the water returns to be recirculated. If you don't have any confidence to remove the parts and clean it out yourself, get an appliance repair person to do the job.

This may help you.
I had the same problem and fixed it by disassembling the lower spray arm and return filter, and cleaning all the junk out.
Most dishwashers have 'risers' that bring the water up to the top sprayer or arm located under the top rack. If the recirculating pump is plugged even a little there won't be enough volume or pressure to get the water up there.
Test this by putting a dry muffin pan in the top rack, flat, and running the dishwasher for a bit. If there is no water on the top (or the bottom) either the top sprayer or the sprayer arm underneath the top rack is not getting enough volume.
To fix this you need to clean out the screen and filter, where the water returns to be recirculated. If you don't have any confidence to remove the parts and clean it out yourself, get an appliance repair person to do the job.

Just to review, the LG dishwasher family, including the LDS5811 has the Verio motor and the check valve that diverts water from the bottom rack to the top rack.

If the valve is blocked/jammed, this would cause the symptom you describe. The valve is visible from inside the DW after you open it up.

It is also possible that this motor has failed.

After observing the water just gushing out when the spray arm was removed, we determined there was still a bunch more calcification/soap in the ends of the spray arm. (We have very hard water in our area). Unfortunately, you cannot open up the spray arms to clean them out, so it took about 30 minutes of pounding and manipulating to get all the gunk out. Now my dishes are clean again. Hallelujeh! And the water cleaning the dishes is cleaner, as well.