How do I request a quotation for a hose assembly or fitting, and how fast will I get a reply?

Send the hose marking or part number, a photograph of both end fittings, the length between fitting faces, the machine model and serial number, the quantity, and the destination port through the contact page of Guangzhou Shenyue Machinery Technology Co., Ltd. Quotations normally come back within 24 hours, with the complete assembly, the hose by the metre and the individual fittings each priced on its own line in genuine, OEM-quality and aftermarket grades.

How do I identify a hydraulic fitting with no part number?

Measure the thread outside diameter and the thread pitch, photograph the fitting from the side so the seat type is visible, and note the angle of any elbow. From those four pieces of information — thread, pitch, seat and angle — the fitting is normally identified, because the international and metric standards define a finite set of possibilities.

Can I reuse my old fittings with new hose?

Sometimes, if the fittings are the crimp-on type, undamaged, and the same internal diameter and pressure class as the new hose. Reusing a fitting of the wrong pressure rating, or one that has been swaged more than once, is a false economy on a circuit running at 300 bar.

Excavator Hydraulic Hoses and End Fittings: How to Order the Right One by Photograph

Hydraulic Guide · September 29, 2026 · Guangzhou, China

Excavator Hydraulic Hoses, End Fittings and Quick Couplers: Ordering the Right One the First Time

Hydraulic hose is the part that stops an excavator dead in the field, and the part most often ordered by description rather than specification. "A pressure hose for a 20-ton machine" is not an orderable line: the same machine carries everything from a 60-bar pilot line to a 350-bar main circuit, and a wrong end fitting will not simply leak — it will not go on at all. This guide explains how hose and fittings are specified and what to photograph before sending an enquiry. Guangzhou Shenyue Machinery Technology Co., Ltd. quotes hose assemblies, fittings and couplers daily.

Corbay is the international export brand of Guangzhou Shenyue Machinery Technology Co., Ltd., Guangzhou, China. This is a category where the discipline behind the supplier matters more than the brand on the carton: an assembly is only correct if the hose rating, internal diameter, fitting thread, seat and angle are all correct at once — five variables, and four of them are invisible in a photograph of the machine.

Read the Hose Marking First

Almost every hydraulic hose carries its own specification printed along the cover: a standard (for example 1SN, 2SN, 4SP, 4SH or an R-series equivalent), a size in millimetres or dash numbers, and a working pressure. That marking is the most useful piece of information in a hose enquiry, because it settles the pressure class without guessing. Construction matters as much as the rating: an inner tube for the fluid, one or more wire braid or spiral layers for pressure and impulse resistance, and an outer cover for abrasion and weather. Two hoses with the same internal diameter and nominal pressure can differ completely in impulse life and abrasion resistance, which is why fleets working in rock pay for the heavier cover.

Fittings: Thread, Seat and Angle

Thread standard.JIC (37-degree flare), ORFS (flat face O-ring seal), BSPP, BSPT, metric DIN and NPT all appear on excavators — often on the same machine. Thread outside diameter plus pitch identifies the family.

Seat type.A 37-degree flare, a flat face with an O-ring, a 60-degree cone or a bonded seal washer. Photograph the fitting from the side so the seat is visible; this is the detail buyers most often omit.

Angle and direction.Straight, 45-degree, 90-degree or a bent tube — and on which side of the assembly. A correct fitting at the wrong angle is a hose that rubs through in a month.

Internal diameter and length.Measure between the fitting faces, not end to end, because fitting length varies between types.

Where Excavator Hoses Actually Fail

Bend radius.The most common cause. A hose forced into a tighter bend than its rating allows fails at the fitting, where the wire layers are already stressed.

Abrasion.Hoses running through a track frame or across a boom rub through the cover, then the braid, then the tube. Sleeving or re-routing is cheaper than replacing a hose every season.

Heat.Hoses close to the exhaust or turbo age from the outside in, going hard and cracking. High-temperature covers exist for exactly these positions.

Crimp quality.An assembly made with the wrong die or ferrule passes a pressure test and fails under impulse in service.

Reference Numbers We Quote

Hose assemblies are usually quoted from the machine's own part number where it survives, and from specification where it does not. Our catalogue, for example, lists hoses referenced as YN52V01016R620 / YN52V01016R610 / YN52V01016R100 for R-series machine classes, LC05P00043S032 / LC05P00043S002C for SK330-8 applications, YY52V01006P1 for SK135SR machines and further hydraulic hoses under references such as YN52S00023P1 / YN52S00012P1. Where a reference is only commonly quoted rather than fully confirmed, it is labelled as such on the quotation — the machine and hose nameplate is the authority, not a catalogue entry.

Quick Couplers, Seals and the Small Parts That Cause Big Failures

Quick couplers and flat-face couplings are a category of their own, and their failure mode is nearly always the same: a worn or incorrect O-ring, or a face damaged by dirt entering an uncoupled line. Because a leaking coupler looks like a leaking hose, buyers replace the wrong part. Replace the seals, cap the line when it is disconnected, and check the coupler face for scoring before spending money on hose. Sealing components from makers such as NOK are the reference standard here, and the correct compound — NBR for standard hydraulic oil, HNBR or FKM where temperatures run higher — decides whether the seal survives. Contamination is the other silent killer in this circuit; our hydraulic oil cleanliness guide explains the ISO cleanliness targets that stop new hose and new seals failing early.

What We Need to Quote a Hose

Six things get a hose quotation right first time: the hose marking or machine part number; a photograph of both end fittings from the side; the internal diameter; the length between fitting faces; the working pressure of the circuit, if known; and the quantity plus the destination port. Quotations normally come back within 24 hours with the complete assembly, the hose by the metre and each fitting quoted separately, every line carrying its grade, and any reference that is commonly quoted rather than fully confirmed flagged before it ships. For a fleet, tell us which machine models you run and we will quote a hose kit per model — it removes the guesswork from field repairs entirely.

Hydraulic Hose — FAQ

Do you supply hose for machines other than Kobelco?Yes — hose assemblies, fittings and couplers are quoted across Komatsu, Hitachi, Doosan, Hyundai, Sany, XCMG, Caterpillar and other makes, identified from the hose marking and the machine data plate.

Can you make an assembly to a drawing rather than a part number?Yes. Internal diameter, length between fitting faces, both fitting specifications and the working pressure are enough to build and test an assembly, and the finished items are photographed before packing.

How do I request a quotation and how fast will I get a reply?Send the hose marking or part number, fitting photographs, length, machine model and serial, quantities and destination port through the contact page — Guangzhou Shenyue Machinery Technology Co., Ltd. normally replies within 24 hours with every grade on the line.

Photograph, Measure, Then Order

Two photographs of the fittings and one length measurement prevent almost every hose ordering error we see. Send them with the machine details and the team at Guangzhou Shenyue Machinery Technology Co., Ltd. will confirm the hose class, the thread and the angle, quote every grade honestly, and photograph the finished assemblies before they ship. The wider hydraulic range is on the hydraulic system page.

Browse Hydraulic Parts Send Hose Photographs

Corbay Excavator Parts is the international export brand of Shenyue Machinery (Guangzhou Shenyue Machinery Technology Co., Ltd.), Guangzhou, China. Shenyue is an independent parts specialist and is not affiliated with, or an authorized dealer of, Kobelco Limited. Parts are supplied as genuine, OEM or clearly identified aftermarket items, and the grade is stated on every quotation.