20513688 Hollow Screw | Genuine Volvo Penta Part

🔧 Product Description

This genuine Volvo Penta hollow screw is an OEM service component used in the Air-Compressor Oil/Coolant Hollow Screw. It is manufactured to the original Volvo Penta dimensional, material and interface requirements for the documented Volvo Penta TAD4/TAD6 industrial diesel application. Technical identification: Hollow screw carrying coolant through the air-compressor pipe connection. In service, it routes the specified fluid or pressure signal between matched components without leakage, restriction, vibration damage or incorrect connection geometry. Selection must be confirmed by OEM part number 20513688, the exact model/product number, serial number and installed assembly configuration.

🚤 Compatibility

Typically suits:

• Volvo Penta TD420VE
• Volvo Penta TAD620VE
• Volvo Penta TAD660VE
• Volvo Penta TAD750VE
• Volvo Penta TAD420VE
• Volvo Penta TAD760VE

• Engine Family: TD, TAD

⚙️ Key Features

• Genuine Volvo Penta OEM hollow screw
• OEM part number 20513688
• Technical distinction: Hollow screw carrying coolant through the air-compressor pipe connection

🔌 Function

Routes the specified fluid or pressure signal between matched components without leakage, restriction, vibration damage or incorrect connection geometry. Install without twist or preload, renew the specified seals/clamps, preserve the original routing and pressure- or leak-test the circuit after assembly.

⚠️ Common Signs of Failure

• Visible fluid leakage, dampness or staining along the line or connection
• Cracking, chafing, corrosion or impact damage
• Restricted flow caused by deposits, deformation or internal collapse
• Vibration fretting or failed support at clamps and mounting points

🛠️ Service Notes

• Check the through-passage is clear and clean before fitting; a blocked hollow screw starves whatever it feeds
• Always fit new sealing washers, one each side of the union where the original had them, and never reuse a crushed washer
• Hold the fitting or pipe end against turning as you tighten, so the line is not twisted and the union is not pulled out of position
• Tighten to the figure in the workshop manual for your engine — these seal by crushing the washer, not by force, and over-tightening splits the head or shears the shank
• Bring the system up to working pressure and check for weeps before closing the space up

📦 Condition

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