# 21380884 Shaft | Genuine Volvo Penta Part

## 🔧 Product Description

A genuine replacement drive shaft used inside selected Volvo Penta D9 and D11 seawater pump assemblies. The shaft transfers mechanical drive from the engine-side pump drive to the impeller and provides the running surfaces required by the pump bearings and shaft seals.

## 🚤 Compatibility

-   **Engine Family:** D
-   **HP Range:** Approximately 425-575 HP

Full model list at the end of this description.

## ⚙️ Key Features

-   Genuine Volvo Penta seawater-pump drive shaft
-   Precision-machined bearing and seal running surfaces
-   Transfers drive torque directly to the pump impeller
-   Suitable for rebuilding specified D9 and D11 pump assemblies
-   Replaces the earlier Volvo Penta shaft reference 3587880
-   Engine type: D9 and D11 turbocharged marine diesel

## 🔌 Function

Drives the seawater-pump impeller and supports correct bearing and seal operation so the pump can maintain cooling-water flow.

## ⚠️ Common Signs of Failure

-   Scoring or corrosion on the shaft
-   Excessive radial play or shaft wobble
-   Water leakage from the shaft-seal area
-   Bearing noise or rough pump rotation
-   Reduced seawater flow caused by drive or impeller slip

## 🛠️ Service Notes

-   Handle and store the shaft so the bearing journals and seal running surfaces stay unmarked — a nick on a seal track will cause a leak that no new seal will cure
-   Remove the protective coating and check the shaft for straightness, scoring, pitting and stepped wear at the journals, splines and seal areas before fitting
-   Lubricate journals, splines and seal surfaces with clean oil of the grade specified for the assembly as it goes together, and renew the seals and any single-use nuts or locking devices disturbed on removal
-   Draw bearings and couplings on square with a press or drawing tool that loads only the correct race — hammering a bearing onto a shaft marks the races and can distort the shaft
-   Set end float, backlash and shim thickness to the values in the workshop manual for your unit, then turn the assembly by hand to confirm it is free before applying power

## 🔄 Supersession & Cross Reference

### OEM Supersession Chain

-   21380884 → Supersedes 3587880

### OEM / Related Numbers

-   3587880 earlier number superseded by this part
-   21380886 - D9 seawater pump assembly
-   22063494 - D11 seawater pump assembly

### Aftermarket / Verified Equivalents

-   JMP Marine: SHA0120

## 📦 Condition

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

## 🔎 Full Model Compatibility

Typically suits:

-   Volvo Penta D9A2J, D9A2G, D9A2L MH, D9A2D, D9A2B, D9A2F, D9A2K, D9A2H, D9A2M MP, D9A2A, D9A2C, D9A2E
-   Volvo Penta D11B3-A MP, D11B4-A MP, D11A-A, D11A-B, D11A-C, D11A-E, D11B2-A MP, D11A-D MP, D11A-E MP, D11B1-A MP

## Details

- **Price:** 628.14 AUD
- **Vendor:** Volvo Penta
- **Type:** Cooling System
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 628.14 AUD | In stock |

## Images

- 21380884 Shaft | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/21380884-shaft-genuine-volvo-penta)
> Updated: 2026-09-22