Water pump Mitsubishi S4F/S2E/S3E/S4E/S4E2 / 3790980 / 34745-11010

Water pump (seal MB30645-50900) for tractors and other machines with Mitsubishi engines of the Mitsubishi S4F, Mitsubishi S2E, Mitsubishi S3E, Mitsubishi S4E, Mitsubishi S4E2 series and others.

The radiator water pump is one of the most important elements of the engine cooling system, and this cooling method is commonly called water cooling . The engine block and engine head are elements that heat up to very high temperatures during operation, and we want to cool them with coolant during operation. Special water channels are drilled in the engine and head to circulate water, which is then pumped back into the engine's water channels. Coolant circulation is possible thanks to the water pump , which is usually placed between the radiator and the engine and is driven by a V-belt from the alternator. We screw the pulley to the pump flywheel, and then the radiator fan, which rotates together with the pulley, providing air movement needed to cool the radiator while the engine is running.

• total height: 150 mm,
• length: 220 mm,
• width: 138 mm,
• spacing of holes for mounting screws visible exactly in the photo,
• connector diameter: 35 mm (IN) / 44 mm (OUT),
• gasket included,
• weight: 5 kg,
• original part numbers: 4307807, 3790980, 34745-11010,
• gasket included: no. MB30645-50900 seals.

Engine models :

Mitsubishi :

• Mitsubishi S4F,
• Mitsubishi S2E,
• Mitsubishi S3E,
• Mitsubishi S4E,
• Mitsubishi S4E2.

Machine models :

Caterpillar :

• Caterpillar F18A,
• Caterpillar FD20,
• Caterpillar FD25.

Toyota :

• Toyota FD45-50,
• Toyota FDC25.

The most common problems and faults of the water pump are the seizure of the bearing , which is subject to high rotational speeds, and the elements that directly cooperate with the pump, such as the pulley and the fan, which are not always properly balanced. A belt that is too tight , a worn belt , a V-belt that is too loose , a V-belt installed at the wrong angle , poor lubrication or lack of grease are other causes that cause damage to the water pump. The first signs of water pump damage or signs of improper operation include an unnatural sound from under the hood, coolant stains under the tractor or temperature spikes visible on the instrument panel clocks.

Warehouse :
M01:B33