The problem you have at this point is the portion of the track that is inside the wall. You will not be able to reach the screws that are inside of the pocket. No, the pocket door kits that you buy, don't have a solution for this problem.
For additional information you can see the articles, 'Replacing Pocket Door Rollers', 'Removing a Pocket Door', 'Pocket Door Adjustment', 'Pocket Door Guides' and 'Troubleshooting Pocket Doors' for additional information.
Types of Hardware Kits
Pocket door kits vary from just hardware kits to complete kits that include the frame material. Kit as the name implies means a collection of parts. A kit for the frame is not assembled and has to be put together. A hardware kit should include a new track and rollers along with stops and guides.
Before you decide to install a pocket door kit, you want to make sure that you cannot repair your pocket door. A big problem with pocket doors is stuck or noisy rollers. See the article 'Lubricating Pocket Door Rollers' for information getting the pocket door to work smoothly. See the article 'Troubleshooting Pocket Doors' for a listing of all the repair topics for pocket doors.
Pocket Door Hardware Kits
The rollers are the main moving part on a pocket door. Over time, the rollers and seize up or get noisy. Replacing them is an option. You can purchase a kit that includes just the roller assemblies and hangers. There will normally be two rollers and two hangers in a kit of this type.
There are some things to be aware of when you go to replace the rollers.
First, the rollers and the hangers are made to work together and they are seldom interchangeable. The hangers are the part that attached to the top of the door. The hangers have a retention clip that hold the hanger onto the bolt for the roller assembly. If replace the rollers, you will also have to replace the hangers. This will involve taking the door off.
The other issue is that the rollers will need to match the track. Different tracks will take different types of rollers. Unfortunately, there is no standardization in pocket door hardware. If you get new rollers, they will need to be the same size and configuration as the old ones.
Pocket Door Hardware and Track Kits
Getting a kit that includes both the roller hanger assemblies and a new track is the safest way to make sure that everything matches. The length of the track needs to be approximately twice as long as the door opening the you have (less a relief space to get the rollers in and out).
The draw back is that you will have to remove some drywall to install the track. You cannot get at the screws that hold the track in place on the inside of the pocket. This is not the end of the world, but it will involve some drywall patching and painting.
Complete Pocket Door Kits
A complete pocket door kit will include, new rollers, hangers, track, framing members and a header assembly. For what you get these kits are reasonably priced and come in common door sizes. See the article 'Pocket Door Sizes' for more information on the sizes available. Double pocket doors are also possible, thus increasing the size options.
Some kits are adjustable, allowing the same kit to be used for more than one door size. The main item that needs to change is the track and header assembly. These can be cut to the desired length to fit your door opening.
It is not easy to retrofit a pocket door into an existing home. You need an opening framed into the wall that is twice the size of the door. The wall itself needs to be more than twice the length of the door to allow for the opening and the jambs.
In addition, the area where the pocket goes cannot have plumbing, electrical or heating runs in it. The door will fill the pocket completely.
If you are remodeling and don't mind opening up a few walls, then installing a complete pocket door kit is an option.
Purchasing a Hardware Kit
Purchasing a pocket door kit does not need to be difficult. The hardest purchase will be replacement hardware for an existing door. New rollers will need to match the track that is alread installed on the door. When you are replacing everything, or installing a new pocket door, getting the correct size is the main concern.
Many times a pocket door can be repaired without replacing the hardware. See the article 'Troubleshooting Pocket Doors' for more information.
Pocket Door Kit Manufacturers
There are several manufacturers that make pocket door hardware and kits. Different manufactureres have different styles of rollers and track. When you are trying to match the rollers to the track it best to find out the manufacturer's name.
The likely place to find this information will be on the rollers. The name of the manufacturer and the model number should be stamped on the roller assembly.
To get the rollers out to examine them you will need to take the door off. See the article 'Removing a Pocket Door' for instructions on taking the door down.
Once you have the correct manufacturer and model number, you can search for the correct replacement parts.
Getting the Right Type of Kit
Determine your needs based on the parts that you need to replace. See the information above that discusses different types of kits. If you are installing a new pocket door, you need a complete kit that includes the framing, track and hardware.
Getting the Right Size Kit
A kit that is 72" will be long enough for most doors. You need a 72" track for a 36" door. Simple math, the track needs to be twice as long as the door opening. You may be able to purchase just the rollers if you can find ones that match. The rollers fit the track and are not interchangeable. Changing the rollers is a lot easier than replacing the track.
Locating and Purchasing Pocket Door Kits
Some hardware and home supply stores have kits in stock. You can also search online. Try 'Pocket Door Hardware Kits' for a search term. You will find that prices vary dramatically. Some suppliers sell hardware that is suitable for commercial doors and they can get quite expensive.
Residential grade pocket door kits should run between $25 and $75. A kit that includes the frame may run as much as $125. Stanley and Johnson Products make some reasonably priced residential grade kits. These kits are good for doors that weigh up to around a hundred pounds. It is unlikely you have a door heavier than that, unless you have a solid core door.
Pocket Door Hardware Items
A standard pocket door kit should include a new set of rollers. The rollers are and assembly that also includes the hanging bolts for the door. The rollers run inside the track at the top of the door. You will get two roller assemblies for each door leaf that you have.
Along with the rollers there should be two matching hangers or brackets. The hangers go on top of the door. The hangers are made to attach to the hanging bolts and they carry the weight of the door.
Other items will include the pocket door guides and a bumper along with misc. screws that you will need to install the items.
Installing Pocket Door Rollers
Pocket door rollers are fairly easy to install. The end of the track should be cut short at the strike side door jamb. Look up at the corner of the door on the strike side of the door to locate this spot. To remove the rollers, you need to remove the pocket door. This is a little tricky to do. See the articles 'Removing a Pocket Door' and 'Putting a Pocket Door Back On Track' for instructions on what to do.
For a complete discussion on installing pocket door rollers, see the article on 'Replacing Pocket Door Rollers'.
Installing Pocket Door Hangers
Pocket door hangers are part of the assembly that includes the rollers at the top of the door. The hanger includes a bolt that attaches to the roller carriage. The hanger has an adjustment nut that aligns the door in the opening. The attachment plate is screwed into the top of the door.
Most pocket doors have two hangers. In order to work on them or replace them, you have to remove the door. See the articles 'Removing a Pocket Door' and 'Putting a Pocket Door Back On Track' for instructions on what to do.
For instructions on how to replace the hangers, see the article 'Pocket Door Hangers'.
Installing Pocket Door Guides
Pocket door guides go on the bottom of the door jamb on the pocket side of the door. They can be one or two pieces that are attached with screws.
The pocket door guides keep the door centered in the pocket. They help it to stay aligned as it moves in the opening. You want to set them so that there is no more than a 1/16" between the door and the guide when the door is centered in the opening.
The guides have a slotted hole in them that allows for them to be adjusted. The article 'Pocket Door Guides' provides information on setting them properly.
Installing a Pocket Door Bumper
For an existing pocket door it could be a problem to change this piece of hardware. The bumper goes on the jamb stud that is at the far end of the pocket. The bumper's purpose is to stop the door from going to far into the pocket.
If the wall is opened up you can change the bumper. If the jamb stud was set correctly the bumper should stop the door at the edge of the jamb face on the pocket side of the door. If it hangs out or goes in to far some trimming or shimming may be required.
Pocket Door Track
Replacing pocket door track on an existing door can be difficult. Getting at the track inside of the pocket is the biggest challenge you will face.
Before you tackle a project like this, you might want to see if you can repair your pocket door. See 'Troubleshooting Pocket Doors' for all of the repair topics.
There are only two to four screws that hold it in place. Yet, if you cannot reach them they are an important issue. Even if you opt to tear out the old track with a pry bar, you will not be able to get the screws installed on the new track. There are some options but they involve some work. See the article 'Replacing Pocket Door Track' for instructions on what to do.