# 20718731 Yoke | Genuine Volvo Penta Part

🔧 Product Description

  

Genuine Volvo Penta Cylinder-Block / Frame Yoke - Part Number: 20718731

  

Structural yoke used in the D9 cylinder-block and lower-frame assembly. It forms part of the block/frame retention and alignment hardware rather than a driveline universal-joint yoke.

  

⚙️ Key Features

  

• OEM geometry for the D9 cylinder-block and frame assembly

• Supports correct location or retention of the mating block/frame component

• Designed for combustion load, vibration and thermal movement

• Used with the original cylinder block, frame and locating hardware

• Direct replacement for a cracked, distorted or worn original yoke

  

🔄 Supersession & Cross Reference

  

OEM Supersession Chain:

  

• 20718731 (OEM catalogue reference)

  

OEM / Related Numbers:

  

• 24426731; 21170630; 21236687 cylinder-block references

• 20575260 lower frame

• 21644471; 21644617; 21971224 frame-reinforcement references

• 20485996 and 950588 locating pins

• 8131145 guide sleeve

• 1547040 flange screws

  

Aftermarket / Verified Equivalents:

  

• No aftermarket equivalent

  

🚤 Compatibility

  

Commonly used on:

  

• D9 cylinder-block, lower-frame and structural-engine assembly

  

Typically suits:

  

• Engine models:

• D9A2A D9-425; D9A2A D9-500; D9A2A D9-575; D9A2A D9A-MG; TAD940GE; TAD940VE; TAD941GE; TAD941VE; TAD942VE; TAD943VE; TAD950VE; TAD951VE; TAD952VE

• HP Range: Approximately 300-575 HP, depending on engine rating

• Engine Type: 9.4 L six-cylinder turbocharged/aftercooled diesel

• Year Range: Approximately 2000s-2010s

  

🔌 Function

  

Provides structural retention or location between the cylinder block and its lower frame, helping maintain alignment under combustion and crankshaft loading.

  

Common signs of failure:

  

• Cracking, distortion or fretting at the yoke contact surfaces

• Loose or repeatedly loosening frame/block fasteners

• Misalignment between the cylinder block and lower frame

• Abnormal vibration or movement at the structural joint

• Uneven wear around locating pins or mounting faces

  

📦 Condition

  

• Genuine Volvo Penta part

• Brand new

• Supplied in original or equivalent packaging

## Details

- **Price:** 18.94 AUD
- **Vendor:** Volvo Penta
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 18.94 AUD | In stock |

## Images

- 20718731 Yoke | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/20718731-yoke-genuine-volvo-penta)
> Updated: 2026-07-30