Parker Chelsea has announced an upcoming remote mount valve changeover that will affect several Chelsea Power Take-Off (PTO) series. Beginning September 1, 2026, Chelsea Products Division will replace remote mount valves 379686-12X and 379686-24X with updated valve assemblies 330172-12X and 330172-24X, respectively.
Old Assembly
PN 379686-12X & 379686-24X
New Assembly
PN 330172-12X &330172-24X
At Western Integrated Technologies (WIT), we help customers keep hydraulic, pneumatic, and mobile systems running stronger, faster, smarter, and more efficiently. As a trusted source for Parker Chelsea Power Take-Offs, PTO parts, hydraulic components, and truck hydraulic support, we want to make sure our customers are prepared for this upcoming product update.
Remote Mount Valve Part Number Change
Effective September 1, 2026, the remote mount valve part numbers will change as follows:
| Current Remote Mount Valve | Replacement Remote Mount Valve |
|---|---|
| 379686-12X | 330172-12X |
| 379686-24X | 330172-24X |
Affected Chelsea PTO Series
This change applies to several Chelsea PTO series used in truck and mobile vocational applications. WIT offers Parker Chelsea Power Take-Offs designed for reliable engagement and disengagement control in demanding mobile equipment environments. Chelsea PTO options include 6-bolt, 8-bolt, countershaft, split-shaft, powershift, and front-mount applications, with shift options such as air, cable, lever, and electric shift.
- Chelsea 272 Series
- Chelsea 272U Series
- Chelsea 281 Series
- Chelsea 281L Series
- Chelsea 282 Series
- Chelsea 871 Series
- Chelsea 871L Series
- Chelsea 890 Series
- Chelsea 892 Series
Why Parker Chelsea Is Making the Change
The new remote mount valve assembly is designed around Parker Chelsea’s standard cartridge valve. This updated design supports simpler installation and improved reliability while still meeting the needs of demanding truck and mobile hydraulic applications.
One of the biggest advantages of the new assembly is that it does not require any wiring harness alterations. For installers, fleet maintenance teams, and upfitters, that means a more straightforward changeover with fewer electrical modifications to manage.
The new design also reduces the number of fittings required. Fewer fittings can mean:
- Simpler installation
- Fewer potential leak points
- Cleaner hose routing
- Easier service and maintenance
- Improved long-term reliability
For vocational trucks and mobile hydraulic systems, reducing leak points is especially important. Even small hydraulic leaks can create downtime, cleanup issues, safety concerns, and avoidable maintenance costs.
Installation Notes for the Updated Remote Mount Valve
When mounting the updated valve assembly, Chelsea engineers recommend using 5/16-inch bolts that are at least 2.5 inches long to secure the manifold to the truck frame.
Installers should also pay close attention to the lube port plug configuration.
The lube port plug comes installed for all applications. However, it must be removed for certain applications, such as Allison 3K and 4K Series transmissions, where high-pressure lubrication is supplied from the transmission.
For transmissions that require a separate low-pressure lubrication circuit, the plug must remain installed.
Because lubrication requirements can vary by transmission and PTO configuration, it is important to verify the correct setup before installation.
Exhaust Port Hose Routing and PTO Disengagement
The updated valve assembly also includes an exhaust port function that supports proper clutch disengagement.
When the PTO is disengaged, a hose connected to the exhaust port on the valve assembly allows oil to flow back to a port on the PTO. This return path helps ensure proper clutch disengagement and reliable operation of the PTO system.
Correct hose routing is critical for performance, so technicians should follow Parker Chelsea installation guidance for the specific PTO and transmission combination.
For more information about related Parker Chelsea PTO options available through WIT, visit:
WIT’s Chelsea PTO Build Program includes selected Chelsea PTO models, including 272, 281, 282, and 890 Series, helping customers access faster delivery than traditional distribution channels for popular configurations.
Spotlight: Chelsea 282 Series PTO
The Chelsea 282 Series PTO is one of the PTO series affected by the remote mount valve changeover. The 282 Series is Parker Chelsea’s next-generation medium-duty hot shift PTO, engineered with upgraded internal components capable of handling up to 300 lb-ft of torque in intermittent or continuous operation. It is designed for applications such as fuel delivery, towing and recovery, aerial equipment, construction, and water trucks. (westernintech.com)
Learn more about the affected Chelsea 282 Series PTO here:
Spotlight: Chelsea 890 Series PTO
The announcement also applies to the Chelsea 890 Series PTO. The 890 Series was designed to fit Allison 3000/4000 Series transmissions and moves the PTO/pump mounting flange to the rear of the transmission to support improved pump clearance. WIT notes that all 890s include Wet Spline outputs for longer pump spline life. (westernintech.com)
Learn more about Parker Chelsea PTOs, including the 890 Series, here:
How WIT Can Help
Whether you are maintaining a single work truck, managing a fleet, or building hydraulic systems for vocational equipment, WIT can help you navigate the Parker Chelsea remote mount valve changeover.
Our team supports customers with:
- Parker Chelsea PTOs and components
- Truck hydraulic centers
- Hydraulic system design and fabrication
- Hose assemblies and high-volume hose production
- Fittings, adapters, couplings, hoses, tubing, and piping
If you currently use remote mount valves 379686-12X or 379686-24X, now is a good time to review your PTO configurations, replacement part needs, and upcoming maintenance schedules.
Prepare for the September 1, 2026 Changeover
Parker Chelsea’s update reflects a continued focus on product reliability, simplified installation, and customer support. With the move to remote mount valve assemblies 330172-12X and 330172-24X, customers can expect a simplified design that reduces fitting count, helps minimize leak points, and avoids wiring harness modifications.
Need help identifying the right replacement valve or confirming compatibility with your PTO series?
Contact Western Integrated Technologies today to speak with our hydraulic and PTO experts.
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