Go Bottom1st accident with my 790
 | liljoe
Join Date: Sep 2003 Posts: 23 maryland 
|
2003-11-03 67938
while i was bush hogging with my 790 something came up and split one of the rubber hyd. hoses under the tractor. before i realized it my steering went away. when i got off to inspect the problem i found a steady stream of hyd. fluid coming out from under the tractor. so here are my questions: do ya think i hurt anything? can i just replace the hose and refill the system,will it bleed itself? do they make or has anyone seen any type of skid plates for the bottom of the tractor ? upon inspection there are alot of rubber hose connections under the tractor. thanks joe
Reply to |
Quote Reply |
Add Photo1st accident with my 790
 | F350Lawman
Join Date: Jul 2003 Posts: 411 Goshen, NY
 Pics
|
2003-11-03 67940
I looked at mine,it didn't seem like it was all that vulnerable but obviously it happens. I don't think they make an underneath skidplate for the 790 but I could be wrong. They do make armor kits for the top hoses and hoods of some JD tractors. I guess you could fashion something with soem steel. What about some 1/2" or 3/4" plastic wire covers that they use under car hooods to protect the wiring That would seem to give some pretty decent extra protection aaginst sharp flying debris for the hoses and wires at a good price. ....
Reply to |
Quote Reply |
Add Photo1st accident with my 790
| austros
Join Date: Jul 2003 Posts: 4 ON Canada
|
2003-11-04 67943
You can replace the hose and refill. Then again depending on how much fluid you lost you may want to change it all and filters too. The system will bleed itself. I've seen some 4000 models with kevlar hose covers, that may help. I do not know if they are available for the 790 series. Happy hoggin'
....
Reply to |
Quote Reply |
Add Photo1st accident with my 790
 | Art White
Join Date: Jan 2000 Posts: 6898 Waterville New York 
Pics
|
2003-11-04 67945
liljoe, I hope you did shut it off. You should be able to change the hose, fill the rear to the appropriate level and start the engine. Then after running for three or four minutes shut it off and check the fluid, if fine then start the engine and cycle the steering to be sure the fluid has refilled the areas left empty from the hose breakage and go out and finish mowing. DO take time to make sure that the hydraulic fluid has replaced the air in the steering system completely as I have seen people loose there steering again do to and air pocket and cause more damage. ....
Reply to |
Quote Reply |
Add Photo1st accident with my 790
| TomG
Join Date: Feb 2002 Posts: 5406 Upper Ottawa Valley
|
2003-11-04 67951
It's good to run a little oil through a new hose or at least blow it out with air before connecting up the outlet end. If 790's have a screen in the pressure hose to the 3ph I'd check it if the screen is downstream from the break.
There's a chance that junk from the broken hose or from the ground got into the hose and pushed beyond the hose end before the tractor was shut down. That's what those (can be aggravating) JD in-line filters are there for I guess. I'd also clean areas around the fittings thoroughly before removing the hose. This is just preventative stuff. It's also not too likely a pressure side obstruction will happen but they do occur and it's a bit of a tear down if it ends up in the control valve assembly. When it's back together, don't test for leaks in a pressure hose with your fingers, use a piece of cardboard. Otherwise you could end up missing a finger.
As Art mentioned, tractor hydraulics are mostly self-bleeding. Any air is just pushed through to the reservoir. It's good to cycle everything through max ranges and hold the loader and steering at the limits a few seconds to open a relief valve. ....
Reply to |
Quote Reply |
Add Photo1st accident with my 790
 | Murf
Join Date: Dec 1999 Posts: 7249 Toronto Area, Ontario, Canada
Pics
|
2003-11-04 67952
Joe, we take pieces of rubber suction hose, the soft red stuff, with the same inside dimension as the outside dimension of the subject hose and cut it open in a slow spiral pattern. Because of the spiral cut all you have to do is slip it around the other hose and it stay in place by itself. The soft rubber seems to absorb any impact by compressing rather than cutting or breaking. It is cheap protection and we use it everywhere a hose is exposed or could rub on something. If you put only a short piece as abrasion protection a little dab of silicone sealant will stick it place very well.
Best of luck. ....
Reply to |
Quote Reply |
Add Photo1st accident with my 790
 | Chief
Join Date: Jul 2003 Posts: 4297 Southwest MiddleTennessee
Pics
|
2003-11-04 67953
Everyone seems to have hit the high points. Sounds to me like you shut the engine off quickly while you still had oil left in the system. Replace the hose (as already mentioned the kevar hose wrappers are extra protection), fill the main res. up. Turning the steering full stroke lock to lock a few times will aid in purging any air left in the system. Be very aware during this initial start up listening for unusual noises (from the pump) and looking for any leaks. Shut her down & let set for a few minutes to let oil settle in res. Check oil level again, top off to proper level if required. Let it run and warm up to full operating temp. and try turning the wheels lock to lock again just to be sure no leaks or problems when warmed up. I think you will be fine. Let us know how the repair went. ....
Reply to |
Quote Reply |
Add Photo1st accident with my 790
| JAZAK5
Join Date: Jul 2003 Posts: 276 coxsackie,ny
|
2003-11-04 68019
sounds like you got the problem fixed,A hot rod trick for power steering would be making a hose out of areo. stainless braid ,indestructable and flashy and the last hose needed.
thank goodness you didnt get a facefull of hot fluid
be safe and take care !!!!! ....
Reply to |
Quote Reply |
Add Photo
Go Top
Share This