Right-Hand (RH Passenger Side) Cabin Door Lock Latch Mechanism for Fiat & New Holland Tractors with Siac / Super Comfort Cabs - Part Number: 65417021
The heavy-duty right-hand (RH passenger-side) cab door lock latch mechanism (part number 65417021, genuine Fiat and New Holland OEM references 76013980, 9960912) is an OEM-grade mechanical door capture assembly developed specifically for Super Comfort and SIAC / TS agricultural tractor cabin enclosures installed across FiatAgri and New Holland utility tractors. Manufactured with a heavy-gauge stamped steel casing protected by a corrosion-resistant galvanized finish, it features a progressive dual-stage rotary catch system, internal spring-loaded locking pawls, and secure linkage sockets for external push handles and inside release levers. This replacement latch ensures steady perimeter clamping force against the RH cab door rubber weatherseal, eliminating field vibration, door chatter, draft entry, exhaust fumes, and dust penetration into the operator station. It provides exact plug-and-play fitment on Fiat tractors (Series 66 / 55-66 with Super Comfort or TS/SIAC cabins) and New Holland / Siac cab platforms (TS 23, TS 24, TS 25, TS 28).
Key Features & Engineering Advantages
- Two-Stage Positive Rotary Safety Catch: Two-position progressive engagement (safety catch and full lock) prevents accidental door unlatching under harsh field vibration, chassis flexing, and rough terrain haulage.
- Built Specifically for Siac & Super Comfort Enclosures (RH Side): Hole spacing, backset, and casing dimensions strictly conform to original SIAC and Fiat Super Comfort right-hand door profiles, ensuring direct replacement without drilling or modifications.
- Heavy-Duty Tropicalized Zinc Plating: Rugged metallic housing and internal pivot points resist oxidation caused by constant humidity, field mud, chemical fertilizer dust, and high-pressure water washing.
- High-Tensile Internal Return Spring Pack: Calibrated spring pack delivers smooth, positive handle return, eliminating handle free-play, rattle, and sticky mechanical actuation.
- Superior Cab Ingress & Sound Protection: Exerts uniform clamping pressure against the door rubber seal, preserving operator noise dampening and cabin climate control efficiency.
Technical Specifications
| Commercial Part Number |
65417021 |
| Mounting Location / Side |
Right-Hand (RH - Passenger Side Door) |
| Fiat / FiatAgri OEM References |
76013980, 9960912 |
| New Holland OEM Reference |
76013980 |
| Component Classification |
Mechanical internal cabin door lock latch mechanism |
| Cabin Structure Application |
Super Comfort cabins & TS / SIAC cab series (TS 23, 24, 25, 28) |
| Structural Material |
High-tensile zinc-plated stamped steel with wear-resistant internal pivot pins |
| Actuation Mechanism |
Dual-stage rotary latch with linkage rod attachment sockets |
Equipment Compatibility & Tractor Application Guide
| Manufacturer |
Series / Cab Configuration |
Supported Tractor Models & Cab Frames |
| Fiat / FiatAgri |
66 Series |
55-66 (and related derivatives with factory cab) |
| Specific Cab Packages |
Super Comfort Cab • TS / SIAC Cab |
| New Holland |
Siac Cab Enclosures |
TS 23, TS 24, TS 25, TS 28 |
Installation Advice & Workshop Notes: Before installation, dismantle the inner trim or service cover on the RH cab door to uncover the latch cavity and unclip the linkage rods connected to the exterior handle and interior release lever. Remove the retaining bolts from the door profile and dismount the old unit. Position the new 65417021 latch mechanism, reconnect all operating linkage rods, and verify that they actuate freely without bending or friction. Fasten mounting bolts firmly, then align the striker pin located on the cab pillar: the door should catch cleanly on the initial safety notch and close into the secondary position with moderate hand pressure while fully compressing the perimeter rubber seal. Periodically lubricate internal moving pawls and pivots with white lithium grease or water-resistant PTFE spray.
