David Brown 1410 loader controls problem ????

We have a David Brown 1410 tractor with a Case 66L loader. The loader hydraulics (frame up/down & bucket tilt fwd/back) are controlled by the pair of factory hydraulic control levers to the right side of the driver's seat (so no loader hydraulic controls on the loader itself). The inside lever controls the loader frame lift/drop and the outside lever controls the bucket tilt.

When we operate a rear hydraulic implement(like we did yesterday) we disconnect the hoses that control the bucket tilt feature, and we then hook up the two hoses from the cylinder on the implement to what was the bucket tilt hydraulics. To control the hydraulics to the implement, we use the outside lever beside the driver seat. Yesterday when it was being used, we found out (the hard way) that the outside control lever has a detent position which holds it into place, and we thought it would "kick out" (pressure release valve or some such feature)once the pressure built up when the ram came to the end of it's travel. Is it supposed to do that? Anyways, it didn't kick out and it blew the cylinder apart.

So how is this all supposed to work? The funny thing is that the inside lever (beside the one causing grief) has no detent hold position, once you take your hand off it when operating loader lift or drop, it centers itself back to a neutral position and the hydraulic pressure stops to those loader rams.

Maybe someone can read this through and try to figure out what is happening here (I hope my explanation is clear) and tell me what is happening and if it should be happening the way it is.

There are 3 different types of valves that were factory installed. You could have any combination.

1. spring centered, Sounds like what you have closest the seat.

2. Detent, sounds like your outside one

3. Float

It also sounds like your cylinder was on its last legs, there is a relief valve that keeps the hydraulics from going over 2200 pounds or so.

Thanks for the information ....... I remember you helping us out with a number of items last year when we first got this tractor. The relief valve you mention would be part of the tractor's hydraulic system or in the cylinder itself?

The relief/s are in the high pressure line/s between the pump and valves under the belly of the tractor.