Deskripsi
This page previously carried the words fan motor in its title. That was wrong, and it has been corrected. Caterpillar lists 259-0815 as a 336D fan piston pump, and the matching 10R-8707 reference is the same pump rather than a motor. We would rather fix the record in public than leave a page that sends buyers to the wrong component.
Where this pump sits in the circuit
On the 330D and 336D the cooling fan is turned by a fixed displacement piston motor, and the oil that drives it comes from this pump. Caterpillar’s specification for the closely related 345D describes the arrangement: the cooling fan is hydraulically driven with variable speed control based on ambient temperature, coolant temperature and hydraulic oil temperature. The pump is the component that varies; the motor is the component that converts. When a machine cannot reach full fan speed, either could be at fault, and the test that separates them is measuring delivery at the pump against drain flow at the motor.
The pairing on these machines
| Fungsi | Caterpillar number | Alternate reference |
|---|---|---|
| Fan pump, 330D and 336D | 259-0815 | 10R-8707 |
| Fan motor, 330D and 336D | 234-4638 | 10R-8694, 242-6776 |
| Rotating group inside that motor | 233-2530 | not a pump |
The third row matters because some listings describe 233-2530 as a pump. In Caterpillar’s service literature it is the rotating group of the fan motor assembly. If you are being offered a 233-2530 as a fan pump for a 336D, you are being offered the internals of a motor.
Machine context
The 336D carries a Caterpillar C9 ACERT of 8.8 litre displacement producing 200 kW (268 hp) net flywheel power to ISO 9249 and SAE J1349, with main implement flow of 280 L/min across two pumps, a 43 L/min pilot circuit, equipment relief at 35,000 kPa and a cooling system holding 40 litre. The 330D shares the C9 platform at approximately 184 kW. Note that the 336D Series 2 is published at 265 L/min per pump with a different power rating, and its fan drive parts should not be ordered from Series 1 data.
Diagnosing before you replace this pump
- Prove the command first. If the controller is not asking for full cooling, a new pump changes nothing. Regulator diagnosis and adjustment covers the signal side, and pengujian sensor coolant takes ten minutes.
- Measure delivery. Flow and pressure at the pump output against the machine specification is the decisive test, set out in our panduan diagnosis pompa fan hidraulik.
- Rule out starvation. A restricted suction line or low oil level makes a pump sound dead and destroys it slowly.
- Check the motor too, because a motor passing flow internally will look like a pump that cannot deliver. The tests are in the fan motor diagnosis guide.
Pemasangan
Compare shaft, pilot, bolt pattern, port orientation and control position against the removed pump before cleanup starts. Fit a new return filter element and clear the suction strainer. Prime the casing with clean oil before cranking, since dry starting is the standard way an axial piston pump dies in its first minute. Route the case drain to tank with no restriction. Then prove full fan speed under thermal load and log both temperatures.
Terms
Minimum order one piece. Replacement units carry a three to six month warranty as stated on your proforma invoice; genuine Cat and used cores are sold without warranty. Bench tested, photographed against your order before the wooden case closes, delivery 5 to 8 working days from payment subject to stock. The mating motor is on our 234-4638 fan motor page, and the rest of the range sits under Motor fan hidraulik Caterpillar.
