Save This Page ] [ Follow Ups ] [ Post Followup ] [ John Deere Tractor Discussion Forum ] [ FAQ ] Save This Page ] [ Follow Ups ] [ Post Followup ] [ John Deere Tractor Discussion Forum ] [ FAQ ]
| | SSB Farm Tractor Parts, Manuals & Antique Tractors | | Aftermarket Farm Tractor Parts | | Service & Repair Farm Tractor Manuals | |
| | Tractor Implements | | Tractor Seats | | Trailer Parts | | Tractor Loaders | | PTO Generators | | Small Engines | | Rear View Backup Camera | |
| | Pedal Toy Tractors | | Tractor Books | | Tractor Data / Info / Specs | | Tractor Blog | | Antique Tractors History | | Related Sites | | Rustic Home | |
 SEARCH MANUALS  | FIND PARTS |
In Reply to: 4020 hydraulic problem posted by Mike on Sunday, February 08, 2004:
Make sure you have the proper amount of hydraulic oil in the transmission. If the transmission pump was going bad it would make the front pump chatter as it would not be getting enough hydraulic oil. Once you push in on the clutch the transmission charge pump stops pumping. The charge pump is driven when the clutch is engaged. I would check my pressure at the priority valve. The priority valve sends pressure oil to the steering and brakes first, then to the rest of the tractor, it should have 2250psi, and when you engage two hydraulic functions (ie;SCV Box/steering)the pressure shouldn't drop below 1500-1700psi. As for the 3 point, the first place to look is the rockshaft piston. If that doesnt' fix it, your rockshaft control housing needs to be rebuilt. Good luck.