Ford 8n draft control lever5/15/2023 ![]() If the implement drops as soon as you push the clutch pedal in, you have major leakage. ![]() If you have an implement on the lift and it drifts down over a few minutes time after the tractor is shut off you have some leakage. Leakdown is probably the most common complaint with the N tractors, but it’s usually easy to fix. “My lift drifts down when the pto stops.” This is an excellent time to rebuild the lift cylinder also. Before replacing the top cover, take the time to inspect everything else in there for wear or other problems. Many times you will find that simply replacing the worn pin will take care of the problem without any further adjustments, but you have to completely reassemble the tractor to find out if you are lucky or not. Reassemble the linkage and adjust as per the shop manual instructions. That usually works ok if you can’t spare the two bucks for a new one). 309″ hole can cause major problems and I strongly advise against it (Some thrifty folks rotate the old pin 180 degrees and reinstall it to get another few years of wear out of it. This is listed as a 5/16″ x 7/8″ dowel pin but it is actually. Replace with the correct hardened dowel pin part number 374072S from Ford/New Holland. Disassemble the control linkage until you can get the part with the worn pin out of there. Remove the top cover and place it bottom side up on the workbench.įind the worn pin. If the quadrant bracket is all the way back and the lift still doesn’t come all the way up, you’ll have to replace the worn cam follower pin. Slide the quadrant bracket toward the rear of the tractor (bolt holes are elongated). Loosen the 4 bolts holding the quadrant control lever bracket to the top cover. This is a very common complaint and can almost always be attributed to a worn cam follower pin in the lift control linkage. “My lift only comes up half way then stops.” Check the pump pressure as outlined in the I&T FO-4 manual. If no oil is spraying out anywhere, you could have a bad pump. Raise the lift control lever and watch inside the cavity for oil spraying out in the area of the relief valve or from the side of the cavity where the tube is located. Have a fairly heavy weight or load on the lift arms. To check these, leave the side cover off and start the tractor. Other possibilities are a defective relief valve or a ruptured oil tube that goes from the pump base to the top cover. Make sure the rod is connected and that it is moving the control valve spools in and out as you move the lift control lever up and down. If those two things check out ok turn off the engine and remove the right side access cover (the one with the dipstick) and slide your hand down along the control rod into the oil and feel the end of the rod where it goes into the control valve pivot. ![]() ![]() If the lift won’t raise at all, first make sure the pto is engaged and the pto shaft is turning as it should be. If the oil looks milky, it’s got water in it. You definitely don’t want that to happen. In cold climates the water can freeze and break the chambers in the pump. It has a tendency to accumulate moisture from condensation inside the gear cases and the water collects in the bottom of the sump where it is drawn directly into the hydraulic pump. The oil sump holds 5 gallons that is shared with the transmission and rear end of the tractor. It’s also highly recommended that you change the hydraulic oil (gear oil) and keep it fresh and clean at all times. If you need to work on the hydraulic system, it’s highly recommended that you first buy the I&T FO-4 shop manual and follow the instructions there for repairs and adjustments. ![]() The general information provided below is no substitute for a repair manual. The most common complaints are addressed below. The control lever and quadrant moves the valve spools on the pump to control the lift. It consists of a pto driven piston type pump with internal control valves and a lift cylinder connected to the rear lift arms. The 8N hydraulic system is simple yet elegant and works great when properly adjusted and maintained. “My hydraulic lift isn’t working right.” Answer: ![]()
0 Comments
Leave a Reply. |