VolvoHydraulic Parts

21985798 — Control Valve 21985798 21356266 For Volvo Truck Fh4 Fm4 Nh16 Fm10 Fm11 Fmx12

This control valve is a critical component within the hydraulic system of Volvo trucks, regulating fluid flow and pressure to actuate various functions. It is manufactured to meet stringent Volvo quality standards, ensuring durability and precise operation compared to a worn valve exhibiting leaks or sluggish response. Operators may notice erratic steering, slow brake application, or suspension system malfunctions when this valve begins to fail.

Control Valve 21985798 21356266 For Volvo Truck Fh4 Fm4 Nh16 Fm10 Fm11 Fmx12 – Part No 21985798 – Volvo Spare Part
Part Specifications
BrandVolvo
CategoryHydraulic Parts
ConditionAftermarket — OEM Specification
DispatchSame-day from Mumbai (before 3 PM IST)
GST InvoiceAvailable — all orders
Export DocsCommercial invoice, packing list, COO

Compatible Models

Always verify with serial number before ordering.

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Installation & Application Notes

Flush hydraulic lines before fitting new components. Use only manufacturer-specified hydraulic fluid. Check O-rings and backup rings for correct orientation. Bleed air from system after installation.

Always consult the OEM service manual for model-specific torque values and procedures. WhatsApp our technical team if you need fitment guidance.

Part TypeHydraulic Control Valve
MaterialSteel and rubber seals
ApplicationHydraulic control system
Service LifeReplace as needed based on inspection
CompatibilityVolvo specification
ConditionNew — OEM specification aftermarket

Failure Symptoms

Initial signs of a failing control valve may include a slight delay in hydraulic system response or minor leaks. If ignored, the valve's performance will degrade, leading to more significant operational issues and potential loss of control over hydraulic functions. Continued operation with a faulty valve risks damage to other hydraulic components due to inconsistent pressure or flow.

Installation Tip

Thoroughly flush the hydraulic system to remove any debris before installing the new valve, as contaminants can quickly damage new components. Avoid overtightening fittings, which can strip threads or crack the valve body.

Service Note

Inspect the hydraulic fluid level and condition, and check associated solenoids and wiring for any signs of damage or malfunction.