(quoted from post at 16:50:09 04/19/15) My 9,000hr 1974 4430 QR seems to starve for hyd oil flow, disk, planter,3pt. loader start vibrating when I lift them, increasing engine RPM's helps but doesn't solve it. This has been going on for many years it's not my main tractor anymore so this has been put on the back burner. It gets worse after being warmed up. Here's what I know, Stand-by pressure is 2450 PSI. The front pump was rebuilt 2 years ago due to it leaking out of the shaft seal and 3 of the caps, it was a total rebuild new pistons etc. helped a little but not enough. The steering valve was rebuilt 3 years ago due to the fact that it had gotten hard to steer, like it had no power steering, after rebuild you can steer it with 1 finger. brakes work fine. The 3pt stays up when it isn't running. Oil line running back to the rockshaft housing is warm after a long day but not hot. It's always had the hydraulic oil,filter changed every 2-3 years along with cleaning the screen which never has anything on it. So I'm wondering if there would be an advantage to replacing the tranny pump, never has been replaced, appears that it's not too difficult of a job. Or am I looking the wrong place. Thanks
TRANSMISSION OIL PUMP
(QUAD-RANGE AND SYNCRO-RANGE) RE228724 KIT (SUB FOR RE213662)
1294 - 4230 Tractor - 16May11
1295 - 4430 Tractor - 16May11
1898 - 4040, 4240 and 4440 Tractors (North American Edition) - 16May11 ( FR DE )
1901 - 4050, 4250 and 4450 Tractors (Engine:6466D,6466T,6359T)(Worldwide Edition) - 16Dec14 ( FR DE )
2249 - 4055, 4255 and 4455 Tractors (Worldwide Edition) - 27Jun14 ( FR DE IT ES SV )
TRANSMISSION OIL PUMP
(INCREASED CAPACITY)
(QUAD-RANGE AND SYNCRO-RANGE) AR75648 OIL PUMP 1 INCREASED CAPACITY, COMPLETE PUMP
INCREASED OIL FILTRATION KIT
(QUAD-RANGE AND SYNCRO-RANGE) AR85271 KIT
RETURN PORT COVER
Cart KEY PART NO. PART NAME QTY TRACTOR SERIAL NO. REMARKS
1 Y1912 PART NOT CODED 1 8-1/2"
2 F3171R O-RING 1
3 R394R O-RING 1
4 R54750 SCREW 1
5 T31170 COVER 1
6 R34733 WASHER 2
7 R66068 PIPE 1
AR75648
1294 - 4230 Tractor - 16May11
1295 - 4430 Tractor - 16May11
1296 - 4630 Tractor - 17May11
1898 - 4040, 4240 and 4440 Tractors (North American Edition) - 16May11 ( FR DE )
1901 - 4050, 4250 and 4450 Tractors (Engine:6466D,6466T,6359T)(Worldwide Edition) - 16Dec14 ( FR DE )
2249 - 4055, 4255 and 4455 Tractors (Worldwide Edition) - 27Jun14 ( FR DE IT ES SV )