From electrics and lighting to engine parts, the Massey Ferguson 7490 in the 7400 series is covered here with more than 350 parts that fit this model.
There is a lot of wiring on a Massey Ferguson 7490, and switches, relays and alternators are typically what starts to play up with age. More than 350 replacement parts for this 7400 series tractor are gathered on this page, from suppliers such as GRANIT, HELLA, Scharmüller, GRAMMER and MAHLE.
A rocker switch for four wheel drive, a push button for the PTO on the fender and relays with holders are small parts, yet a function stops working without them. Before replacing a switch, check with a meter that power is actually reaching it. A suspect relay is easiest to test by swapping it with an identical one from the same fuse box. When the problem follows the relay to its new slot, the culprit is clear.
For charging there is an alternator. Cooling is handled by an electric cooling fan and a fan clutch, and a clutch that no longer engages properly lets the engine run hot under heavy draft work.
A fan clutch is best checked with the engine cold and stopped. If the fan spins on freely by hand with no resistance at all, or has noticeable play, the clutch is worn.
Work lamps, including HELLA units, light up the field after dark. Mirrors, a handle and gas struts for the rear window are here as well, along with a sealing ring for the rear window catch that keeps draughts and dust out. A tractor seat is available for operators who put in long hours.
Replace the rear window gas struts as a pair, even if only one has gone weak, since the other is just as old and will follow soon. Fit them with the piston rod pointing down so the internal seal stays lubricated.
At the rear there are drawbars, and the linkage is covered by hydraulic lifting parts. Seals and sealing rings, for instance for the tank sensor, complete the picture.
Check the identification plate to confirm it is a 7490. For switches, compare the symbol and the rocker colour, and for relays count the pins. Alternators and gaskets usually carry a reference number, so compare it with the product details before you order.
Each of these related tractors has its own page, so you only see parts listed for that specific model:
The rest of the brand is listed under Massey Ferguson parts.
