Caterpillar 289-7789 Hydraulic Filter

The Number That Sits at the Centre of the Kit

On a 330 GC or 336 GC the hydraulic side is where a service order stops being obvious. Cat names one part a hydraulic and transmission filter and another a hydraulic oil filter, both standard efficiency, both listed against the same machine, and neither name tells a buyer which housing it goes into. 289-7789 is the one Cat publishes measurements for: a cartridge element, 116.5 mm across and 244 mm long. That is a real advantage when you are buying at distance, because the two numbers you can check against a photograph are the only two that cannot be argued about later.

It is also the element whose interval changed most in this generation. Cat's launch material for the 330 and 330 GC put the new hydraulic return filter at 3,000 hours, 50 percent longer than the design it replaced, and folded the fuel filters onto a single 1,000-hour interval. The practical effect on a fleet is fewer service stops per machine per year, which means each stop has to be right: a missing element on the day costs a machine-day, not a filter.

Why the Model List Is Not a Fitment Guarantee

Cat's compatible list for this number is long — 320 through 395 excavators, older 324D to 336F carriers, a 3512B generator set — and that length is a warning rather than a promise. Lists of that kind are compiled from component groups, so a machine appears because the assembly appears, not because anyone measured the housing on that serial. Machines that have been reworked in the field, or built to a regional configuration, can differ from the book.

The way we handle it is dull and it works: the buyer sends the model, the serial prefix, and a photo of the element and the housing mouth with a rule across it. We match the 116.5 by 244 mm figures against that, confirm whether the housing takes 289-7789 or 590-9787, and only then quote. For a first order of one or two pieces that is overkill; for a container of service kits it is the difference between stock and scrap.

Ordering It Inside the Full Service Set

Most of our 289-7789 orders travel with the rest of the C7.1 service set: 322-3155 lube element, 523-4987 fuel water separator, 509-5694 secondary fuel element, the 496-9845 and 496-9846 air pair, and the cab filter 500-0957. The 330 GC filter kit guide puts all eight numbers in one table with the sizes Cat publishes, and the filters catalogue shows what else we hold for the 30 tonne class.

FAQ

Q: What are the dimensions of the Cat 289-7789 hydraulic filter?
A: Cat's parts page for 289-7789 gives the element as a cartridge with a diameter of 4.587 in (116.5 mm) and a length of 9.606 in (244.0 mm), material listed as other mixed, metal and non-metal. Those two figures are what we check an order against: an element that is 5 mm long or wide of them will not seal in the housing, whatever the cross number on the box says.

Q: Which Cat machines use the 289-7789 hydraulic filter?
A: Cat's compatible list for 289-7789 covers the 320, 320 GC, 326, 326 GC, 330, 330 GC, 333 GC, 336, 336 GC, 340, 345 GC, 349, 352, 355 and 395 excavators, the older 324D through 336F carriers, and a 3512B generator set. The 330 GC and 336 GC are both on that list, and both are C7.1 machines, so the same element serves the 30 tonne and 36 tonne GC models.

Q: Is 289-7789 the same as 590-9787?
A: No. 289-7789 is Cat's standard efficiency hydraulic and transmission filter, published as a 116.5 by 244 mm cartridge. 590-9787 is a separate standard efficiency hydraulic oil filter whose product page carries no measurement block, and whose compatible list runs from the 312 GX to the 395. Both appear on 330 GC and 336 GC parts listings, so supply the housing photo rather than the model name when you order.

Q: What does the 289-7789 filter cross-reference to?
A: The only cross we located is one aftermarket listing that pairs 289-7789 with YA00013068, SH60830 and ST30174. We treat that as a lead, not a verified catalogue cross, because no filter maker's own publication we could read confirms it. Order on the Cat number and the two dimensions, and measure the element you remove if a cross number is all your local supplier can offer.