569-50-8T205 Komatsu HD465-7 Suspension Cylinder Aftermarket Replacement

Product Overview

SEIGO’s aftermarket suspension cylinder, part number 569-50-8T205, is a direct drop-in replacement for the Komatsu HD465-7 rigid-frame mining dump truck — a mechanical-drive haul truck in roughly the 55 tonne payload class, widely used in open-pit mining and large-scale earthmoving. Komatsu catalogues this part as a Cylinder Assembly within the 569-50-8T suspension series, and it weighs approximately 193 kg (426.8 lbs).

A suspension cylinder is not an implement cylinder — it is a gas-over-oil strut that carries the static and dynamic load of the truck corner, damps road-induced shock, and maintains ride height. On a rigid haul truck running rough haul roads shift after shift, the suspension struts are among the most safety-critical and hardest-worked structural components on the machine: a strut that has lost its nitrogen charge changes ride height, alters load distribution across the axle, and accelerates tyre and frame wear.

Available parts sourcing data for the HD465-7 lists 569-50-8T205 in the rear suspension position, alongside the front suspension cylinder 569-50-8T408, body lift cylinder 707-09-00061 and steering cylinder 707-00-0C870. Because the 569-50-8T series contains multiple front, rear and auto-suspension numbers that differ by position and generation, the machine serial number is the only fully reliable way to confirm the exact part. Send us your serial number and we will confirm 569-50-8T205 is correct for your machine and position before you order.

The failure pattern on a suspension strut is distinct: nitrogen charge loss through the rod seal, rod chrome pitting from haul-road stone impact, and internal bleed-down that lets the corner sag over time. SEIGO manufactures the 569-50-8T205 to address exactly these — a 42CrMo4 induction-hardened, hard-chrome-plated rod finished for stone-impact resistance, a high-integrity rod seal and gas-charge sealing package, and a barrel machined to hold charge over long service intervals. Every unit is pressure and charge tested before shipment from our Guangdong factory and is backed by a 12-month or 5,000 operating-hour warranty. Standard lead time is approximately 30 days ex-works, with expedited production available for mine-site downtime.

Product Specifications

* OEM part numbers, brand names and model designations are used for identification and cross-reference purposes only. SEIGO Machinery is an independent aftermarket manufacturer and is not affiliated with Komatsu Ltd.

Komatsu HD465-7 Cylinder Reference

The HD465-7 uses the following main hydraulic cylinders across suspension, body hoist and steering. Part 569-50-8T205 is a suspension cylinder.

Cross-reference compiled from HD465-7 parts sourcing data. Front and rear suspension struts are not interchangeable, and cylinder specification can vary across HD465-7 build years. Confirm your machine serial number and the position you need before ordering. SEIGO supplies suspension, hoist and steering cylinders for the Komatsu HD-series.

569-50-8T Suspension Series — Related Part Numbers

The 569-50-8T sub-series covers the front, rear and auto suspension cylinders across the Komatsu HD-series. Each number corresponds to a specific position and generation.

Numbers sharing the 569-50-8T prefix are related, not automatically interchangeable. Each corresponds to a specific suspension position and machine generation within the HD-series. Confirm against your machine serial number before substituting. SEIGO manufactures suspension cylinders across the full 569-50 series — send us your serial number for the correct part.

Why This Cylinder, Specifically

• Correct position and generation, verified. The 569-50-8T series spans front, rear and auto suspension across HD465-7 build variants. We confirm the exact number and position against your serial number before quoting — the wrong strut on a haul truck corner changes ride height and load distribution from the first shift.
• Built for charge retention. The defining failure mode of a suspension strut is nitrogen charge loss, not work-pressure seal blow-by. We fit a high-integrity rod seal and gas-charge sealing package, and machine the barrel to hold charge across long service intervals.
• Stone-impact rod finish. Haul-road stone impact pits the rod chrome, and pitting is a leading cause of premature seal failure. The rod is finished specifically for impact and abrasion resistance.
• Safety-critical component, built accordingly. Suspension struts carry the structural load of the truck corner and affect handling, braking load transfer and tyre life. We build and test to that standard, with each unit pressure and charge tested before shipment.
• Full traceability and testing. ISO 9001:2015 manufacturing, pressure and charge tested before shipment, shipped in an ISPM-15 fumigated export crate with material certificate and test record.
• Rods, barrels and seal kits supplied separately. For workshops rebuilding struts in-house, we supply the rod, barrel, rod seal, gas-charge seals and bushings as individual service items. Send us your serial number and the component you need for a quotation.

FAQ

Q1: Which Komatsu truck does 569-50-8T205 fit?

A: 569-50-8T205 is a suspension cylinder for the Komatsu HD465-7 rigid-frame mining dump truck, a mechanical-drive haul truck in roughly the 55 tonne payload class. It belongs to the 569-50-8T suspension series. Because this series spans several positions and build variants, confirm the exact fitment against your machine serial number. Send us the serial number and we will verify 569-50-8T205 is correct for your machine before you order.

Q2: Is 569-50-8T205 a front or rear suspension cylinder?

A: Available HD465-7 parts sourcing data lists 569-50-8T205 in the rear suspension position, alongside the front suspension cylinder 569-50-8T408. Because suspension part numbers on these trucks change across build years and positions, we recommend confirming the position against your machine serial number before ordering. Send us your serial number and we will confirm both the part and the position.

Q3: What is the difference between 569-50-8T205 and the other 569-50-8T numbers?

A: The 569-50-8T sub-series covers the front, rear and auto suspension cylinders across the Komatsu HD-series — for example 569-50-8T408 and 569-50-8T300 are front suspension, and 569-50-8T102 is an auto suspension cylinder with payload meter. Numbers sharing the prefix are related but not automatically interchangeable; each corresponds to a specific position and generation. Always confirm against the serial number before substituting.

Q4: What are the warning signs of a failing suspension cylinder?

A: The most common sign is one corner of the truck sitting lower than the others, or the truck riding harder than it used to and bottoming out over bumps it previously absorbed — both indicate nitrogen charge loss. Oil weeping at the rod gland, and visible pitting or scoring on the exposed rod chrome from haul-road stone impact, are also warning signs. Struts on the same axle share operating hours, so a fault on one is a reason to inspect the other.

Q5: Do you supply the other HD465-7 cylinders and seal kits as well?

A: Yes. SEIGO supplies suspension, body hoist and steering cylinders across the Komatsu HD-series, and also supplies rod seals, gas-charge seals, bushings and complete seal kits as individual service items for workshops rebuilding struts in-house. Send us your machine serial number and the part or component you need for a quotation.

Q6: What is the lead time and how does it ship?

A: Standard production lead time is approximately 30 days ex-works Guangdong, China, with expedited production available for mine-site downtime. Each strut ships in an ISPM-15 fumigated wooden export crate, FOB Shenzhen, CIF or DDP. At approximately 193 kg, sea freight is standard for planned replacements; air freight is available for urgent situations.

SEIGO Machinery is an independent aftermarket manufacturer. All OEM part numbers, brand names and machine model designations are used for identification and cross-reference purposes only. These aftermarket components are not manufactured by, endorsed by, or affiliated with Komatsu Ltd.