WOW ! talk about jumping in at the deep end before doing your home work. Crikey.
Don't wish to spoil your parade, but before you go fitting brakes on your trailer, do some research into what brakes you wish to be fitted.
There are MECHANICAL BRAKES
, ELECTRIC BRAKES
, HYDRAULIC BRAKES
.then we have drum brakes and disc brakes, dizzy yet ? You should be.
So, lets go back a bit. Most wheels on your trailer are simply fitted with bearings straight onto the axle, then the wheel fits onto the stud, end of story.
However, if you wish to fit brakes things change, the first thing you must decide is what type of brakes are you going to fit, DRUM brakes or disc brakes. Is there sufficient clearance to fit them?
The drum is simply a round drum on which two shoes are squeezed to provide retardation, the squeezing process can be activated either, mechanicaly, hydraulicaly, or electricaly.
A disc brake is just a round disc attached to the stud, over this disc is a fitting which houses the brake pads, these pads are squeezed again by either of the three methods mentioned above.
There are Pros and cons for any of the three systems, however the largest being price and serviceability. Pending on your choice and ability to cover the costs the choice is yours.
However, after seeing the pics of your trailer, I'd suggest mechanical drum brakes, these will be operated by a moveable tow hitch,(can trailer be fitted with such?) when you brake the pressure will be transmitted thru the tow hitch to the mechanical system attached to the brake mechanism on the wheels by cable thus providing the retardation required.
With such a system, it pays to keep an eye on the free play on the tow hitch and the lever which activates the cable, as after a small time the brake pads wear in and the gap needs adjusting otherwise the brakes will no longer apply.
If the gap is too small, the trailer brakes will apply too early and make for erratic brake application.
Electric brakes are a whole different kettle of fish, with such a system you can increase or decrease the amount and time delay of the retardation. Also, as the name implies, the mechanical retardation is provided by an electro magnet within the wheels themselves.
These also require regular maintenance, as in many cases these magnets come loose and simply lie at the bottom thus being useless, especially if driving on gravel roads, also have tendency to short out in deep water.
The hydraulic system is much like the mechanical, except the cable is replaced by hydraulic line with brake fluid doing the hard work.
At the end of the day, I'd give serious consideration as to your needs, going by the picture of your trailer, I have reservations whether brakes would be needed. I'd load it up with everything you use for camping, fill water tanks ect, ect, take it over a weighbridge and weigh it fully loaded. If it weighs outside the legal recommened weights, then I guess it's time to do something about it.
But, because of the cost involved, it may also be cheaper to sell or exchange that trailer for one that's already so fitted.
Hope some of this is of use to you.