858467 18-3175 Raw Water Pump Cross Piece for Volvo Penta AD31L-A AD31P-A AD31XD AQAD31A MD31A TAMD31A | JLM Marine

Raw Water Pump Cross Piece – Fits Volvo Penta AD31, AD41, TAMD31, TAMD41, KAD42, KAD43, KAD44, KAD300 & More

This Raw Water Pump Cross Piece (Coupler) is designed for Volvo Penta AQ diesel inboard engines equipped with 6-screw pump covers. It fits a broad range of models including AD31, AD41, TAMD31, TAMD41, TMD31, TMD41, KAD32, KAD42, KAD43, KAD44, and KAD300 series engines. The coupler sits between the sea water pump and the pump drive gear unit, transmitting torque while allowing for minor misalignment.

This aftermarket replacement cross-references Volvo Penta 858467, Orbitrade Marine ORB15467, Crom Marine 115064, and GLM GLM12852, ensuring compatibility across multiple supplier part numbers.

• Located between the raw water pump and drive gear unit
• Essential for proper pump operation; a worn coupler can cause pump seizure
• Direct replacement for engines with 6-screw pump cover configuration

Part Number Cross-Reference

Use this table to confirm equivalent part numbers across OEM and aftermarket brands.

Compatible Engine Models

Confirm your engine model/year in the table below.

Technical Specifications

Package Contents

This package includes:

• 1 × Raw Water Pump Coupler Cross Piece

The package contains all the parts shown in the picture.

Installation Guide

1. Disconnect the battery and ensure the engine is cool before starting work.
2. Remove the raw water pump from the drive gear housing by unscrewing the 6 mounting screws on the pump cover.
3. Carefully withdraw the pump assembly to expose the cross piece coupler.
4. Inspect the old cross piece for cracks, wear, or deformation; replace if any damage is found.
5. Remove the old cross piece from the drive gear shaft and pump impeller shaft.
6. Install the new cross piece by aligning it onto the drive gear shaft first, ensuring proper seating.
7. Align the pump impeller shaft with the opposite end of the cross piece before reassembly.
8. Reinstall the raw water pump onto the drive housing, ensuring the gasket is in place and the alignment is correct.
9. Tighten the 6 pump cover screws in a cross pattern to the manufacturer's torque specifications.
10. Check for free rotation by manually turning the pump shaft to ensure no binding or resistance.
11. Reconnect the battery and run the engine briefly to verify proper water flow and pump operation.
12. Inspect for leaks around the pump assembly and retighten screws if necessary.

Troubleshooting & FAQ

How do I confirm this cross piece fits my engine?
Verify that your raw water pump has a 6-screw cover configuration and that your engine model is listed in the compatibility table above. Cross-check your current part number against Volvo Penta 858467 or the aftermarket equivalents listed.

What are the signs that my cross piece needs replacement?
Common symptoms include pump seizure, unusual vibration or noise from the pump area, overheating due to reduced water flow, and visible cracks or deformation when inspecting the coupler during pump service.

How often should I replace the raw water pump cross piece?
Inspect the cross piece annually or whenever the raw water pump is removed for service. Replace it if you observe any wear, cracking, or deformation, or as part of a preventive maintenance schedule every 3–5 years depending on engine usage.

Can I reuse the old cross piece if it looks okay?
While minor surface marks may be acceptable, any visible cracks, twisting, or material degradation warrant immediate replacement. Given the low cost and critical function, replacing the cross piece during pump service is good preventive practice.

What's the difference between this aftermarket part and the OEM Volvo Penta cross piece?
This listing is an aftermarket replacement part (not an OEM component). We build to OEM specifications using comparable-grade materials. Production is done in an ISO9002-certified facility, and each batch is inspected for consistent performance.

How fast do you ship and how much does it cost?
We offer fast global shipping—typically 5–15 days worldwide—and standard shipping is free. Expedited options are available at checkout depending on your location.

What is your warranty and return policy?
This product includes a 1-year warranty against manufacturing defects under normal use. If something goes wrong, contact our support team with your order details. Returns are accepted within our standard return window (unused & in original condition); please see our policy page or reach out for instructions.

Important Notes

• Verify that the product images and specifications match your original part. If discrepancies exist—even if your model is listed—do not proceed with the purchase.
• This product is an aftermarket replacement part and is not an OEM component.
• Professional installation is recommended to ensure safety and optimal performance.

Why Choose JLM MARINE?

• Quality Assured: As a trusted manufacturer for over 20 years, we supply top marine brands globally.
• Fast Global Shipping: Free delivery worldwide in 5–15 days.
• Direct from Manufacturer: Competitive pricing without compromising quality.