11700271 Delivery Valve | Genuine Volvo Penta Part

🔧 Product Description

A genuine Volvo Penta cylinder-block oil delivery valve used in D5A, D7A and D7C engine lubrication systems. The valve is installed with its ring, valve piston, compression spring and sleeve and regulates the oil passage within the crankcase assembly. This listing is for the delivery-valve component only. Ring 20405904, valve piston 20405936, compression spring 20405896 and sleeve 20405937 are separate parts and are not included.

🚤 Compatibility

• Engine Family: D, TD, TAD, MD
• Year Range: Approximately late 1990s through 2000s

Full model list at the end of this description.

⚙️ Key Features

• OEM Volvo Penta part number 11700271
• System group: Fuel System
• Supersedes previous part number 20405937
• Net weight approximately 0.107 kg
• Fits D5A, D7A, D7C, MD2010, TD and TAD series diesel engines
• Engine type: Volvo Penta D5A / D7A / D7C and corresponding TAD / TD diesel engines

🔌 Function

The delivery valve sits between the injection pump element and the high-pressure line, opening to release each metered fuel charge and then closing to retain residual line pressure. This retained pressure gives sharp injector cut-off and prevents secondary injection or dribble at the nozzle.

⚠️ Common Signs of Failure

• Hard starting or extended cranking before the engine fires
• Rough running, misfire or uneven idle on one cylinder
• Black or smoky exhaust from poor injection cut-off and nozzle dribble
• Loss of power and inability to hold rated speed under load
• Fuel leakage or loss of line pressure at the injection pump outlet

🛠️ Service Notes

• This is a lapped, matched assembly: keep the valve and its seat together, handle them by the ends only, and never mix parts between pumping elements
• Work in scrupulously clean conditions with clean fuel or test oil — a single particle on a lapped face will stop the valve sealing
• Fit new sealing washers and O-rings and tighten the valve holder to the figure in the workshop manual for your engine; over-tightening distorts the seat and under-tightening leaks
• Injection pump work belongs on a test bench, so have delivery and timing checked and the pump recalibrated by a diesel fuel injection specialist after fitting
• Establish why the old valve failed — water or dirt in the fuel is the usual cause, so drain and clean the tank, lines and filters before the pump goes back into service

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 11700271 → Supersedes 20405937

OEM / Related Numbers

• 20405937 earlier number superseded by this part
• 20405904 related valve ring
• 20405936 related valve piston
• 20405896 related compression spring

Other-Brand OEM Numbers

• VOE11700271 Volvo Construction Equipment reference

📦 Condition

• Genuine Volvo Penta part
• Brand new
• Supplied in original or equivalent packaging

🔎 Full Model Compatibility

Typically suits:

• Volvo Penta D7A-B TA, D7A-T, D7A-TA, D7C-B TA, D7C-TA
• Volvo Penta D5A-B TA, D5A-T, D5A-TA
• Volvo Penta MD2010, MD2010B
• Volvo Penta TAD520GE, TAD520VE
• Volvo Penta TAD530GE MECH, TAD530GE EDC4
• Volvo Penta TAD531GE MECH, TAD531GE EDC4
• Volvo Penta TAD720GE, TAD720VE
• Volvo Penta TAD721GE, TAD721VE
• Volvo Penta TAD722GE, TAD722VE
• Volvo Penta TAD730GE MECH, TAD730GE EDC4
• Volvo Penta TAD731GE MECH, TAD731GE EDC4
• Volvo Penta TAD750GE, TAD750VE
• Volvo Penta TD520GE, TD520VE
• Volvo Penta TD720GE, TD720VE PP
• Volvo Penta TAD532GE EDC4
• Volvo Penta TAD550GE
• Volvo Penta TAD551GE
• Volvo Penta TAD732GE EDC4
• Volvo Penta TAD733GE EDC4
• Volvo Penta TAD751GE
• Volvo Penta TAD760VE