Custom Hydraulic Cylinder for Forklift Steering

Requirement Submission

Submit your engineering drawing (OEM) or provide the application parameters — bore range, stroke, working pressure, mounting type, port position, seal specification, and any environmental requirements such as temperature range, corrosion resistance, or food-grade compliance (ODM).

Engineering Review

Our hydraulic engineering team reviews the specification for manufacturability, verifies the pressure/bore/wall-thickness relationship against ISO 6022 / ISO 6020 standards, and confirms the seal configuration. For ODM projects, we produce a preliminary assembly drawing for your approval before tooling begins.

Prototype & Validation

First-article production, dimensional inspection report, hydrostatic proof test at 1.5× working pressure, and leakage test per ISO 10100. We ship the prototype with a full inspection certificate. You install, test, and provide feedback. Design modifications are incorporated before production release.

Volume Production

Series production on dedicated CNC lines with in-process SPC monitoring. Every cylinder 100% pressure-tested. Packaging per your specification — individual poly bags, foam-lined cartons, wooden crates, or custom branded packaging. Delivery scheduling via blanket orders with monthly call-off quantities.

Global standard for forklift OEM applications. Parker Prädifa and Parker Polypac rod seal profiles offer the widest temperature range (-40°C to +110°C) and the broadest chemical resistance portfolio. Most commonly specified by European and North American forklift OEMs.

Dominant in Japanese and Korean forklift OEM supply chains. NOK seal compounds are formulated for the specific hydraulic oil grades used by Toyota, Komatsu, Mitsubishi, and Hyundai forklift platforms. Preferred when the cylinder must match an existing Japanese-origin seal specification.

Specialist heavy-duty seal profiles for high-cycle steering applications. Hallite's PTFE-based rod seals offer exceptionally low friction and long service life in rapid-cycle steering systems — reducing the steering effort the operator feels at the wheel and extending the maintenance interval.

Premium European seal profiles with advanced material compounds for extreme-environment applications — cold storage (-40°C), food-grade washdown, and high-contamination outdoor operations. The Turcon and Zurcon material families cover applications that exceed the temperature or chemical limits of standard NBR and polyurethane seals.

When an OEM is designing a new forklift model, the steering geometry is optimised for the vehicle's wheelbase, axle track, and turning radius requirements — not for an existing cylinder catalogue. The cylinder dimensions follow from the vehicle design, not the other way around. Custom manufacturing allows the cylinder to integrate seamlessly into the optimised geometry rather than forcing the vehicle design to accommodate a catalogue cylinder.

Forklifts manufactured 15–30 years ago use steering cylinders from suppliers that may no longer exist. The original part numbers are discontinued, and no aftermarket equivalent is available. Custom manufacturing from the original drawing (or from reverse-engineering measurements taken from the failed cylinder) produces a direct replacement that restores the vehicle to its original steering specification without modification to the axle or linkage.

Large forklift fleets (200+ vehicles) with multiple makes and models maintain dozens of different seal kit part numbers. By specifying all custom replacement cylinders with a single seal brand (e.g., Parker throughout), the fleet reduces its seal inventory from dozens of part numbers to a manageable few — cutting parts inventory cost and eliminating the risk of installing the wrong seal in the wrong cylinder.

Standard catalogue steering cylinders are designed for -20°C to +80°C with standard NBR seals. Forklifts operating in blast freezers (-40°C), foundries (+120°C), marine salt-air environments, or food-processing washdown zones need seal materials, surface treatments, and coating specifications that no standard catalogue cylinder offers. Custom manufacturing addresses the specific environmental requirements with the appropriate material selection.

I do not have an engineering drawing — can you still produce a custom cylinder?

Yes, through the ODM route. Provide as much information as you have: the failed cylinder itself (we can reverse-engineer from physical measurements), the forklift make/model/serial number, photographs of the cylinder and its mounting, and the bore/stroke/port dimensions if measurable. Our engineering team will produce a drawing for your approval before manufacturing. Alternatively, provide the application requirements (load, speed, pressure, mounting envelope) and we design the cylinder from scratch.

What is the cost difference between a standard catalogue cylinder and a custom one?

For a single prototype, the custom cylinder costs approximately 2–4× the catalogue equivalent due to one-off setup and tooling. At 100+ pieces, the premium drops to 20–50% above catalogue depending on the level of customisation. At 1,000+ pieces with repeat orders, the unit cost approaches catalogue pricing because the setup costs are amortised across volume and the production line runs at standard efficiency. Contact Korea Ever-Power with your specification and annual volume for a specific quotation.

Can you apply our OEM brand markings to the cylinder?

Yes. Laser engraving, ink-jet printing, and adhesive labels are available for applying your brand logo, part number, serial number, date code, and any regulatory markings (CE, UL, etc.) to the cylinder body or rod end. Provide the marking artwork, placement drawing, and font specifications. For volume orders, custom packaging with your brand graphics is also available at no additional tooling cost above 500 pieces.

Is the 1-year warranty the same for custom and standard cylinders?

Yes. All Korea Ever-Power cylinders — standard and custom — carry a 1-year warranty against manufacturing defects in materials and workmanship. The warranty covers the cylinder housing, piston rod, seals, and all internal components under normal operating conditions per the agreed specification. The warranty does not cover damage from exceeding the rated working pressure, using incompatible hydraulic fluid, or operating outside the specified temperature range.

Can you produce custom cylinders for applications other than forklift steering?

The same OEM/ODM capability applies across the full range of industrial vehicle hydraulic cylinders — forklift tilt, lift, steering, and attachment cylinders, as well as aerial work platform cylinders, agricultural machinery cylinders, and sanitation vehicle cylinders. The custom manufacturing infrastructure is shared across all product lines, so the same engineering review, quality process, and testing standards apply regardless of the application.