Caterpillar Excavator Hydraulic Parts: 300 Series
Caterpillar excavator hydraulic parts for 300 series machines, from mini units up to the 390 class. We stock main pumps, travel motors, swing motors, control valves, hydraulic cylinders and seal kits, in five grades: our own RITO brand, genuine, rebuild, OEM and aftermarket.
The most expensive mistake here is ordering the auxiliary pump instead of the main one. Caterpillar lists them separately, under Pump GP-MAIN and Pump GP-AUXILIARY, and the two numbers sit close together in the same parts list. On a 320C, 204-2747 is the auxiliary pump, not the main.
Caterpillar model to pump cross reference
- 319D, 320D, 321D, 323D: SBS120, 272-6955
- 325D, 328D, 329D: 272-6959 or 10R-9071
The 25 to 29 ton class uses a different pump entirely, so a 320D pump will not serve a 329D. For 330, 336, 345, 349 and 390 class machines, send the serial number and we will confirm the assembly.
If the number you were given sits next to GP-AUXILIARY in the parts list, it is the wrong pump. Send us the machine serial and we will tell you which pump group it is.
We have supplied Caterpillar hydraulic components since 2003, are an authorised TongMyung distributor, hold CE certification MTL23112100304R01, and ship a test report with every unit.
