Comments on: David Brown 880 Selectamatic Hydraulic Problem http://vintagetractorengineer.com/2009/01/david-brown-880-selectamatic-hydraulic-problem/ Thu, 29 Jul 2010 18:39:58 +0000 http://wordpress.org/?v=2.9.1 hourly 1 By: Ifan http://vintagetractorengineer.com/2009/01/david-brown-880-selectamatic-hydraulic-problem/comment-page-1/#comment-1165 Ifan Sat, 22 May 2010 22:31:31 +0000 http://vintagetractorengineer.com/?p=81#comment-1165 I have a david brown 885, I hooked a finger mower on today, when I was working on the finger mower the hydaulic arms would just drop slowly, and I have to give her a good rev to lift it back up but it still falls down even on high revs, can any one help me? please!!!! I have a david brown 885, I hooked a finger mower on today, when I was working on the finger mower the hydaulic arms would just drop slowly, and I have to give her a good rev to lift it back up but it still falls down even on high revs, can any one help me? please!!!!

]]> By: Ken http://vintagetractorengineer.com/2009/01/david-brown-880-selectamatic-hydraulic-problem/comment-page-1/#comment-671 Ken Sat, 06 Mar 2010 19:56:06 +0000 http://vintagetractorengineer.com/?p=81#comment-671 I have a David Brown 885. I changed the trans/hydraulic oil and filter and cleaned the mesh type screen. I found the fill plug for that to the left of the steering column. I need to know what the plugs on each side of the seat are for. If they are for fluid, what type? The one by the left side of the seat seems dry. The one by the right side of the seat, when checking with a screw driver has a small amount of lube of some kind. I do not have a manual of any kind. The rear hydraulics work fine now, but I am concerned about the plugs by the seat. Any help would be appreciated. Ken I have a David Brown 885. I changed the trans/hydraulic oil and filter and cleaned the mesh type screen. I found the fill plug for that to the left of the steering column. I need to know what the plugs on each side of the seat are for. If they are for fluid, what type? The one by the left side of the seat seems dry. The one by the right side of the seat, when checking with a screw driver has a small amount of lube of some kind. I do not have a manual of any kind. The rear hydraulics work fine now, but I am concerned about the plugs by the seat. Any help would be appreciated. Ken

]]> By: gerry lavelle http://vintagetractorengineer.com/2009/01/david-brown-880-selectamatic-hydraulic-problem/comment-page-1/#comment-452 gerry lavelle Sat, 10 Oct 2009 18:28:04 +0000 http://vintagetractorengineer.com/?p=81#comment-452 there should be a small round plate at the drain plug on the gearbox. remove this and there is a mesh filter , it just pulls down, clean this well( if you remove the o-ring from the top and pour a drop of petrol on and light it , it will be fairly clean, just tap on a hard surface and blow out with an airline) after fill the gearbox with 5 gall of diesel , start it up and use the lift until the diesel gets around the valves and cleans any grit out , drain and refill with new oil there should be a small round plate at the drain plug on the gearbox. remove this and there is a mesh filter , it just pulls down, clean this well( if you remove the o-ring from the top and pour a drop of petrol on and light it , it will be fairly clean, just tap on a hard surface and blow out with an airline) after fill the gearbox with 5 gall of diesel , start it up and use the lift until the diesel gets around the valves and cleans any grit out , drain and refill with new oil

]]> By: Jim McKechnie http://vintagetractorengineer.com/2009/01/david-brown-880-selectamatic-hydraulic-problem/comment-page-1/#comment-438 Jim McKechnie Wed, 23 Sep 2009 20:03:33 +0000 http://vintagetractorengineer.com/?p=81#comment-438 Des.... Hydraulic type oil is too thin for the hydraulics... not sure of the number of the correct oil but the same grade of oil as whats in the engine is the correct grade - should find the hydraulics work better after that Midlands, welcome to the world of david brown hydraulics - sounds as if theres a stuck valve somewhere- the knob to the right of the seat near the diff lock pedal controls the speed of drop of the hydraulic arms- the hydraulic pump is located in the rear of the tractor- you'll need to remove the pto housing and its right in front of you (if a long shaft comes out along with housing shove it back in when you draw the housing off far enough to grab it ) First thing I can think of is to check that the cable that controls draft control on the top link bracket isnt seized . 2nd thing would be to remove the oval plate (on the right hand side behind the quadrant lever on the top ) (there may be a dump valve through the plate (remove it and u should see 2 hydraulic valves- take the caps off to expose them (I suspect one of these valves will be stuck)CAREFULLY REMOVE THE CONED VALVEs - DONT DROP IT IT'LL FALL TO THE BOTTOM OF THE TRANSMISSION CASTING LOL ) clean it with a dust free cloth and put them back in- this may help :-) Des…. Hydraulic type oil is too thin for the hydraulics… not sure of the number of the correct oil but the same grade of oil as whats in the engine is the correct grade – should find the hydraulics work better after that

Midlands, welcome to the world of david brown hydraulics – sounds as if theres a stuck valve somewhere- the knob to the right of the seat near the diff lock pedal controls the speed of drop of the hydraulic arms- the hydraulic pump is located in the rear of the tractor- you’ll need to remove the pto housing and its right in front of you (if a long shaft comes out along with housing shove it back in when you draw the housing off far enough to grab it )

First thing I can think of is to check that the cable that controls draft control on the top link bracket isnt seized . 2nd thing would be to remove the oval plate (on the right hand side behind the quadrant lever on the top ) (there may be a dump valve through the plate (remove it and u should see 2 hydraulic valves- take the caps off to expose them (I suspect one of these valves will be stuck)CAREFULLY REMOVE THE CONED VALVEs – DONT DROP IT IT’LL FALL TO THE BOTTOM OF THE TRANSMISSION CASTING LOL ) clean it with a dust free cloth and put them back in- this may help :-)

]]> By: BUCS http://vintagetractorengineer.com/2009/01/david-brown-880-selectamatic-hydraulic-problem/comment-page-1/#comment-341 BUCS Wed, 22 Jul 2009 19:16:52 +0000 http://vintagetractorengineer.com/?p=81#comment-341 Midlands I'm having the same problem. Let me know if you find the solution. BUCS Midlands I’m having the same problem. Let me know if you find the solution.
BUCS

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