I noticed that you are driving the trailer around with the clip(the one right behind the lunette-ring, but before the brake contraption. It has a chain attached to it, so as to not lose it). That clip should only be utilized when reversing or parking the trailer. The reason is, that the trailer being self-braking, the braking action of the trailer depends on the inertia developed while braking. When you apply the brakes on the jeep, the lunette-ring stays in motion with the jeep, but the rest of the trailer is suspended by the coil spring on the ring, therefore the weight of the trailer and hence the inertia developed, pushes the trailer forward (or on the trailer itself, when this happens, it would look like the lunette-ring moves backwards), and along the way hitting and pushing a small arm located behind the coil spring, on the rearward stem of the lunette-ring. This small arm that i am talking about, works as a brake lever, thereby engaging the brakes when its pushed backwards
This trailer i think, is rated at 250kgs or nearby, although by theory it has to be double that, since the primary reason why the military prefered a Braked-trailer on the Non-Braked trailed is to double the towing capacity of the trailer. The debate being that, since the stopping action can now be shared equally between the towing and towed vehicle, it can tow more weight than a Non-Braked trailer while still maintaining the same stopping power. But the indian trailers use soft leaf springs for the suspended wheel, and it only takes the standard Non-Braking trailer weight for the trailer to sit low enough that it pushes the leverage to the braking arm, thereby engaging the brakes. The American trailers,The M100,M110, and the others, on the other hand, use same very heavy duty tapered springs, so it does a lot better,but those trailers are very hard to come by nowadays.
Now, the reason why they provided the clip is, that by the side effect of the braking design contraption, it automatically engages the brakes if its overloaded. If you, by mistake or error, overload it, then that would exert a lot of load on the engine and the other drivetrain components, not to mention burnt brakes and tires, and that too effecting both the the towed and towing vehicles. The most common modification in Punjab to counter this problem, is to remove the braking links altogether, and hence enabling it to lift more weight. Also while reversing the trailer,the lunette-ring again pushes back on the small braking arm and engages the brakes. To avoid that, they provided the clip that disables the braking when it is fitted on the stem of the lunette-ring, not allowing it to move in either direction, so it acts as if it never had any brakes. Although its also possible to disable the overload braking feature by always using the clip, but i doubt its strong enough to handle the stress, and on doing so while towing a laden trailer, evidently something would give way, and thats probably the reason why ppl remove the brakes in the first place rather than just using the clip permanently.
Its not as bad as i make it sound, but taking that extra precautionary measures would take you a long way with a troublefree trailer maintenance. |