Description
| Product Specifications | |
|---|---|
| Part Number / Series | L-HPLC series |
| Size / Range | OA 12.7-38 mm |
| SKU Count | 26 |
| Material | Medium-carbon steel |
| Surface Finish | Zinc plated |
| Heat Treatment | Standard |
| OE Reference | – |
| Compatible Brands | John Deere, Massey Ferguson, New Holland, Kubota, Case IH, Fendt, Claas |
Part No: L-HPLC series | Size: OA 12.7-38 mm | Finish: Zinc plated
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Product Overview
The Hitch Pin – Locking Collar (L-HPLC series) is a medium-carbon steel coupling pin with a spring over-centre locking collar, covering OA 12.7-38 mm in 26 sizes. The over-centre collar must be deliberately compressed to release the pin, providing a positive mechanical lock that cannot be accidentally disengaged by vibration or incidental contact. This makes it the appropriate choice for road trailer coupling pins and other applications where accidental release would create a safety hazard.
Road trailer regulations in several European countries require that coupling pins on agricultural trailers carry a positive retention device that cannot be released without deliberate operator action. A standard hair pin does not meet this requirement in some jurisdictions because it can be dislodged by vibration or contact. The locking collar on the L-HPLC series satisfies this requirement across the pin sizes used in commercial agricultural trailer applications.
Material Specification and Technical Detail
The L-HPLC series uses the same medium-carbon steel shank specification as the L-HPH hair pin series, with the addition of a spring-loaded over-centre collar at the head end. The collar is pressed down against spring pressure to allow pin insertion or withdrawal; when released, the spring holds the collar in the over-centre position, preventing axial movement of the pin. Zinc plating is applied to both pin and collar for corrosion resistance.
The 26-size range covers OA 12.7-38 mm, which spans the pin diameters used in agricultural trailer drawbar connections, heavy implement clevis couplings, and three-point linkage pin applications where a positive lock is required. The collar mechanism is designed for reliable function after extended outdoor storage and in conditions where the pin is infrequently removed.
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Application and Operating Environment
The primary application for the L-HPLC series is agricultural trailer drawbar coupling pins and heavy implement mounting pins where regulations or operational requirements specify a positive-lock retention device. Compatible with John Deere, Massey Ferguson, New Holland, Kubota, Case IH, Fendt, and Claas across trailer and implement applications in the 12.7-38 mm pin diameter range.
Secondary applications include any coupling or linkage point where the operator requires confidence that the pin cannot be dislodged during transport or field operation. The locking collar is particularly valued in applications where the pin is accessible to bystanders or where the implement operates in reverse and the coupling point is not continuously visible from the tractor seat.
OEM Compatibility and Cross-Reference
The L-HPLC series is dimensionally compatible with locking collar hitch pin specifications from John Deere, Massey Ferguson, New Holland, Kubota, Case IH, Fendt, and Claas. The 26-size range covers the main coupling pin diameters used across these brands in trailer and heavy implement applications.
For applications requiring a simple hair pin rather than a positive lock, the L-HPH H-type series provides the same shank diameter range with a pre-fitted wire clip. Both series are stocked for mixed-SKU ordering. Our 3-point hitch kit consolidates the most frequently replaced linkage components into a single order.
Installation Procedure
Follow the steps below for correct installation of the Hitch Pin – Locking Collar in standard agricultural coupling applications.
Select the Correct Diameter
Match the pin shank OA to the clevis or drawbar hole. The locking collar adds to the overall head diameter; confirm that there is adequate clearance around the collar in the installed position.
Depress the Collar to Insert
Press the locking collar down against the spring to allow the pin to pass through the coupling hole. Hold the collar compressed until the pin is fully inserted and the head is seated against the coupling face.
Release the Collar to Lock
Release the collar. The spring will return it to the over-centre locked position, preventing the pin from being withdrawn. Confirm the collar has clicked into the locked position before applying any load.
Release Procedure
To remove the pin, depress the collar fully against the spring and withdraw the pin axially. If the collar is stiff after extended use, clean and lubricate the collar mechanism with light oil before attempting release.
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Why Choose This Supplier
Direct Manufacturer Supply
All products sourced directly from controlled manufacturing facilities. Consistent quality batch to batch without distributor markup layers.
Verified Dimensional Conformance
Critical dimensions verified against OEM samples and published standards before catalogue listing. Data available on request.
Mixed-SKU Order Capability
Different part numbers and sizes combined in a single shipment. No per-SKU minimum quantities for standard stock items.
Technical Support
Part number cross-referencing and compatibility verification on request. Contact [email protected] for product-specific enquiries.
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Related Products
The following products are frequently ordered alongside the Hitch Pin – Locking Collar for complete linkage system maintenance and service kits.
Hitch Pin H-Type
32 sizes, OA 9.5-32 mm, pre-fitted hair pin
Hitch Pin Locking Collar
26 sizes, OA 12.7-38 mm, positive lock
Hitch Pin Red Handle
High-visibility red vinyl head, zinc shank
Hitch Pin with Chain
Captive chain, hair pin retained during uncoupling
Linch Pins Standard Wire
23 sizes, OA 4.5-12 mm, zinc plated
Hair Pins
35 sizes, OA 1.8-8 mm, single-coil zinc plated
Customer Feedback
“We have been stocking the Hitch Pin – Locking Collar for two seasons across our dealer network in Normandy. Fit to John Deere and Claas equipment has been exact and we have had zero returns on dimensional grounds. The zinc finish is holding up well through wet field conditions.”
Patrick F. – France
“The Hitch Pin – Locking Collar is exactly what we needed for our contracting fleet. Fast implement changes are important when you are working to a tight harvest schedule, and having a pin that couples and uncouples reliably with one hand saves time on every field entry.”
Gareth W. – United Kingdom
“Good product and straightforward ordering process. The Hitch Pin – Locking Collar covers all the pin sizes we need for our Fendt and New Holland machines. Packaging is solid and part numbers are clearly marked, which makes goods-in processing quick.”
Lars N. – Denmark
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International Agricultural Parts Supplier | gear-drive.net
