A135281 Check Valve for Doosan D110/130S5 & D50/60/70 Models

Overview

The A135281 Check Valve is a hydraulic component supplied under the Doosan brand for a wide range of heavy-duty diesel forklifts. A check valve plays a critical role in any hydraulic circuit: it allows fluid to flow in one direction only, prevents costly backflow, and helps the system hold pressure where it matters. If a worn or failed check valve is left in service, operators may notice drifting loads, slow lift response, or unstable hydraulic pressure — symptoms that can bring a busy forklift fleet to a standstill. Replacing it with the correct A135281 Check Valve restores dependable one-way flow control and keeps your hydraulic system performing the way the manufacturer intended.

Compatibility

This A135281 for D110/130S5(SB1083/Tier3) and related models is designed as a direct replacement across several Doosan forklift series:

• D110/130S5 series – variants (SB1083/Tier3) and (SB1105/Tier2)
• D160S5 series – variants (SB1084/Tier3) and (SB1106/Tier2)
• D50/60/70/80 series – including D50/60/70/80S2(3ST)(SB1054), D50/60/70A2(SB1015), and D50/60/70S2 (A130012)

Before ordering, we recommend confirming your model and engine code from the forklift data plate to make sure the A135281 is the correct match for your machine.

Quality and Reliability

Because this is a Doosan-branded component, the A135281 Check Valve is produced to the brand’s own material and dimensional specifications. That means consistent sealing performance and dimensions matched to the original housing — no improvised shimming or modification required. Hydraulic check valves operate in demanding conditions, exposed to pressure spikes, heat, and contamination, so a part built to the correct specification is the safest way to avoid repeat failures and unplanned downtime.

Installation and Maintenance Tips

• Fully depressurize the hydraulic system before removing the old valve.
• Clean the surrounding area to keep dirt out of open ports and lines.
• Inspect O-rings and sealing faces; replace any damaged seals during installation.
• Install the valve in the correct flow direction, as marked on the body.
• Tighten fasteners to the torque values given in the Doosan service manual.
• After installation, bleed the circuit as required and check for leaks under load.

Regular hydraulic oil and filter changes will also help extend the service life of the new valve by keeping contamination out of the circuit.

Why Order from Us

At forkliftpartssearch.com, we specialize in helping buyers find the exact Doosan parts they need. Our team can verify fitment for your model, answer technical questions about the A135281, and support you through the ordering process. With clear part-number matching and knowledgeable service, we make it simple to get your forklift back to work. Order the A135281 Check Valve today and keep your hydraulic system running reliably.