20405543 Shim | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta base shim used beneath each unit injection pump on TD520, TD720, TAD530-TAD733 and related engines. Eight shims are used on four-cylinder engines and twelve on six-cylinder engines as part of the pump-height and timing adjustment stack.

🚤 Compatibility

• Engine Family: D, TD, TAD, MD

Full model list at the end of this description.

⚙️ Key Features

• Base shim for the unit injection-pump flange
• Eight used on four-cylinder engines and twelve on six-cylinder engines
• Works with selectable timing shims from 1.0 mm to 3.7 mm
• Used with tappet 11700392 and flange 20405565
• Pump height and injection timing must be measured after installation
• Engine type: Volvo Penta 5- and 7-litre industrial diesel

🔌 Function

Forms part of the shim stack that establishes the injection-pump mounting height and injection timing.

⚠️ Common Signs of Failure

• Incorrect injection timing
• Uneven pump mounting height
• Fuel-pump tappet noise
• Shim fretting or distortion
• Hard starting, smoke or low power after pump replacement

🛠️ Service Notes

• Shims are supplied in graded thicknesses and exist to bring a setting into specification, so measure with a micrometer and select the thickness the setting procedure for your engine calls for rather than matching one by eye
• Note which shim came from which position on removal and keep them identified — once an assembly has bedded in, shims are not interchangeable between positions
• Check both faces are clean, flat and free of burrs, corrosion and old sealant before fitting; dirt trapped under a shim shifts the setting as surely as the wrong thickness does
• Discard any shim that is dished, cracked, pitted or fretted rather than reusing it, and make sure no old shim has been left behind in the recess
• Recheck the clearance or setting after the assembly is tightened down, because clamping load can change the measurement you took loose

🔄 Supersession & Cross Reference

OEM / Related Numbers

• 20881345-20881454 - selectable timing-shim range
• 11700392 - pump tappet
• 20405565 - injection-pump flange
• 20460071 - flange screw
• 20405907 - related sealing ring

📦 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 TD520GE, TD520VE
• Volvo Penta TD720GE, TD720VE PP
• Volvo Penta TAD420VE
• Volvo Penta TAD532GE EDC4
• Volvo Penta TAD620VE
• Volvo Penta TAD732GE EDC4
• Volvo Penta TAD733GE EDC4
• Volvo Penta TD420VE