21503251 Hydraulic Hose | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta D4/D6 Power-Steering Hydraulic Hose - Part Number: 21503251

A formed hydraulic hose used in a selected Volvo Penta D4 or D6 power-steering circuit. It is separately routed from jackshaft hose 21503249 and must be matched by the steering-system diagram.

⚙️ Key Features

• Genuine Volvo Penta hydraulic steering hose

• Factory-crimped pressure fittings

• Correct application-specific length and orientation

• Resistant to hydraulic fluid, heat and vibration

• Not interchangeable with adjacent hose references without diagram confirmation

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 21503251 (current catalogued reference)

OEM / Related Numbers:

• 21503249 - related jackshaft hydraulic hose

• 3808486 - related hydraulic hose

• 3863190 - steering-fluid reservoir

• 21474337 and 21474338 - steering pump and mounting references

Aftermarket / Verified Equivalents:

• No direct formed aftermarket equivalent

🚤 Compatibility

Commonly used on:

• Volvo Penta D4 and D6 hydraulic power-steering systems specifically listing hose 21503251

Typically suits:

• Engine models:

• D4 and D6 Aquamatic or jackshaft packages using the matching steering-hose arrangement

• HP Range: Engine-package dependent

• Engine Type: D4 or D6 turbocharged marine diesel

• Year Range: Steering-system and engine-serial dependent

🔌 Function

Transfers hydraulic fluid through its assigned section of the power-steering circuit.

Common signs of failure:

• Hydraulic-fluid leakage

• Steering assistance becomes weak or uneven

• Cracked or abraded hose

• Air repeatedly enters the system

• Damaged or corroded end fittings

📦 Condition

• Genuine Volvo Penta part

• Brand new

• Supplied in original or equivalent packaging