Komatsu 600-185-5110 Air Filter

The Element With a Published Size — and a Kit Beside It

Air filters are where a parts catalogue is easiest to get wrong, because the housing is invisible on a purchase order. 600-185-5110 is the good case: Komatsu prints its size, 405 mm high at 282 mm square, so the number can be checked against a tape measure rather than trusted. The bad case is its neighbour, 600-185-5100, sold as an Air Filter Kit at 419 mm high and 276 mm square in High Efficiency media. Two numbers, one English name, a 14 mm height difference and 6 mm across.

That is not a labelling quirk. A kit that measures 419 × 276 is a different moulding from an element at 405 × 282, which is why we quote 600-185-5110 by its published figures and ask for the old element's measurements whenever a customer has been offered the kit as a substitute. Komatsu also grades the media differently — Standard White on this number, High Efficiency on the kit — and on a machine working in dust, that grade difference is the whole point of the part.

Why the Safety Element Is Not Optional

Komatsu's brochure for the PC300-8 and PC350-8 specifies a dry type air cleaner with two elements. The outer one is this part; the inner one is 600-185-5120, and Komatsu publishes no dimensions for it at all. The safety element is not a cheaper spare for the main element — it is the second barrier that keeps dust out of the engine when the main element is damaged, over-serviced or simply past its life. A service that replaces only the outer element leaves that barrier sitting in the housing for years.

So the honest way to quote an air service for one of these machines is either the pair — this element plus 5120 — or the kit, and then only after the housing has been measured. Anyone who quotes a single air filter for a PC300-8 without asking which of the three numbers your cleaner takes is guessing on your behalf.

Ordering It With the Rest of the Set

The air element rarely travels alone on these machines. The same service usually takes the hydraulic element 207-60-71181, the pre-fuel spin-on 600-319-3610, the main fuel filter 600-319-3750 and the engine oil cartridge 6742-01-4540. The PC300-8 / PC350-8 filter set guide lists all of them with Komatsu's published sizes, and the filters catalogue shows what we hold for the 30-tonne class.

FAQ

Q: What are the dimensions of the Komatsu 600-185-5110 air filter?
A: Komatsu publishes 600-185-5110 as 405 mm high, 282 mm long and 282 mm wide, style Element, filter media Standard White, with no protective cover and a white exterior. Those are the figures we quote against, and they are what separates it from the 600-185-5100 air filter kit at 419 mm high and 276 x 276 mm.

Q: Does 600-185-5110 come with the safety element?
A: No. 600-185-5110 is the main outer element only. The safety inner element is 600-185-5120, which Komatsu publishes with no measurements at all. Komatsu's brochure for these machines specifies a dry type air cleaner with two elements, so a service that replaces only the outer element leaves the safety element in place well past its life. Order both, or order the 600-185-5100 kit and check its 419 x 276 mm figures against your housing first.

Q: Which Komatsu machines use the 600-185-5110 air filter?
A: Supplier catalogues list it against the PC300, PC300HD, PC300LL, PC340, PC350 and PC360 excavators and the SAA6D114E engine family, and against D65 dozers and WA380 loaders that share the same air cleaner. Komatsu itself does not publish a fitment list for the number, only the specification, so treat the machine list as a starting point and confirm against the housing and the element you remove.

Q: Can I fit 600-185-5100 instead of 600-185-5110?
A: Only if your housing takes the kit. The two numbers are separate Komatsu articles: 600-185-5100 is an Element Kit at 419 mm high and 276 x 276 mm in High Efficiency media, while 600-185-5110 is a single element at 405 mm high and 282 x 282 mm in Standard White. Fourteen millimetres of height and six millimetres across is a different moulding, so measure the old element before substituting one for the other.