20881386 Shim | Genuine Volvo Penta Part

🔧 Product Description

A genuine Volvo Penta 1.8 mm calibration shim for the unit-injection-pump/tappet installation used on the specified D5/D7 mechanically injected engines. The shim sets the installed height of the pump relative to the cam-driven tappet, making it a precision timing and plunger-stroke component rather than a general packing washer.

🚤 Compatibility

• Engine Family: D, TD, TAD

Full model list at the end of this description.

⚙️ Key Features

• Genuine Volvo Penta 1.8 mm Injection Pump Calibration Shim - part number 20881386
• Precision thickness: 1.8 mm
• Engine type: D5/D7-series mechanically injected industrial diesel engines
• TH=1.8mm (Volvo assembly listing)

🔌 Function

Sets the installed height of the unit injection pump against its cam-driven tappet at 1.8 mm, so the plunger stroke and the timing of the injection event land on specification.

⚠️ Common Signs of Failure

• Hard starting, smoke or rough running traced to one pump's timing
• Injection timing found outside specification after a pump has been changed
• Knock or harshness from one cylinder under load
• Shim found pitted, brinelled or dished where the tappet bears
• Measured shim thickness no longer matching the number stamped on the packet

🛠️ Service Notes

• Supersedes 11700403
• Shim thickness is chosen by measurement on the engine, so do not simply refit the thickness that came out
• The family runs from 1.0 mm (20881345) to 3.7 mm (20881454) in 0.

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 20881386 → Supersedes 11700403

OEM / Related Numbers

• 11700403 earlier number superseded by this part

Other-Brand OEM Numbers

• VOE20881386

📦 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 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