# 23310037 Companion Flange | Genuine Volvo Penta Part

## 🔧 Product Description

Genuine Volvo Penta two-piece rigid propeller shaft coupling for a 40 mm shaft, 67 mm long with a 127 mm flange diameter, weighing 5.34 kg and listed for 12 D4 and D6 applications. The catalogue's component guide puts the 127 mm flange couplings on the D3, D4 and D6 with HS25, HS45 and HS63 gearboxes. The two-piece conic design centres itself on the shaft with no tapering or keyway cutting needed, is made from high grade 1018 steel to ISO E 235 with a zinc-nickel coating and sealer, requires a shaft to h9 tolerance of plus 0.0 to minus 0.052, and is delivered complete with bolts, nuts, washers and installation instructions. It supersedes 21820011.

## 🚤 Compatibility

Typically suits:

-   Volvo Penta D6-340I-G
-   Volvo Penta D6-380I-G
-   Volvo Penta D6-440I-G
-   Volvo Penta D6-480I-G
-   Volvo Penta D6-440I-WJ-G
-   Volvo Penta D6-480I-WJ-G
-   Volvo Penta D4-175I-G
-   Volvo Penta D4-230I-G
-   Volvo Penta D4-270I-G
-   Volvo Penta D4-300I-G
-   Volvo Penta D6-300I-G
-   Volvo Penta D4-230A-G

-   **Engine Family:** D
-   **HP Range:** 175-480 HP

## ⚙️ Key Features

-   For a 40 mm propeller shaft
-   67 mm long, 127 mm flange diameter
-   Two-piece self-centring conic design, no shaft machining required
-   High grade 1018 steel to ISO E 235, zinc-nickel coated and sealed
-   Shaft must be to h9 tolerance, plus 0.0 to minus 0.052
-   5.34 kg
-   Supersedes 21820011
-   40mm (Volvo assembly listing)
-   Simplified installation and alignment
-   Less vibration and noise
-   No machining required
-   Two-piece conic design
-   Perfect central alignment
-   High torsional hold without shaft damage
-   Compact dimensions, low weight
-   Virtually maintenance free
-   Easy to disconnect the propeller shaft, without re-adjustment
-   Integrated counterhold
-   Better onboard comfort
-   Flange diameter d: 127 mm (5.00 in)
-   Length l: 67 mm (2.64 in)
-   Material: high grade 1018 steel (ISO E 235) with zinc-nickel coating and sealer
-   Required shaft tolerance: h9 (+0.0 -0.052)
-   Shaft diameter: 40 mm
-   Weight: 5.34 kg (11.8 lb)
-   Fits: D2-55 / D2-75 with HS25 gearbox; D3, D4 and D6 with HS25, HS45 or HS63 gearbox

## 📋 Kit Contents

-   Coupling (two-piece conic)
-   Bolts
-   Nuts
-   Washers
-   Installation instructions

## 🔌 Function

Clamps onto the propeller shaft and bolts to the gearbox output flange, transmitting both drive torque and propeller thrust between them.

## ⚠️ Common Signs of Failure

-   Vibration through the hull that follows shaft speed rather than engine speed
-   Coupling creeping along the shaft, or the shaft moving aft
-   Rust weeping from the clamp joint
-   Bolt holes elongated or the flange faces fretted
-   Clamp bore scored or picked up on removal

## 🛠️ Service Notes

-   The shaft diameter is the critical dimension, so measure the shaft before ordering
-   A clamp coupling only grips a shaft that is true and to h9 size at the clamping area, so check the shaft surface before fitting
-   Realign the shaft to the gearbox after the coupling is fitted
-   Required shaft tolerance is h9 (+0.0 -0.052)
-   Cut the shaft to length and fit the cone - no tapering or keyway cutting is needed

## 🔄 Supersession & Cross Reference

### OEM Supersession Chain

-   23310037 → Supersedes 21820011 → Supersedes 872944 → Supersedes 828145

### OEM / Related Numbers

-   21820011 earlier number superseded by this part
-   872944 earlier number superseded by this part
-   828145 earlier number superseded by this part

## 📦 Condition

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

## Details

- **Price:** 1098.03 AUD
- **Vendor:** Volvo Penta
- **Type:** Drives & Propulsion
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 1098.03 AUD | In stock |

## Images

- 23310037 Companion Flange | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/23310037-companion-flange-genuine-volvo-penta)
> Updated: 2026-10-10