Right-Hand (RH Passenger Side) Cabin Door Lock Latch Mechanism for Case IH & Deutz-Fahr Tractors - Part Number: 65404009

The heavy-duty right-hand (RH passenger-side) cab door lock latch mechanism (part number 65404009, genuine Case IH OEM references K303806, 87639185 and Deutz-Fahr OEM references 04339353/10, 04339353, right-hand counterpart to 65404008) is an authentic OEM-grade door closure and capture assembly engineered to provide positive, secure, and vibration-free cab door locking on Case IH (including Maxxum, CX, and MX cab enclosures) and Deutz-Fahr agricultural tractors (07C series, classic DX, DX 4, DX 6, DX 7, and Intrac 2004 cabs). Fabricated with a heavy-gauge stamped steel housing protected by an anti-corrosion galvanized coating, it incorporates a progressive two-stage safety rotary catch system with linkage sockets for internal release handles, external door handles (such as RH handle 65404022), and locking rods, shielded by protective cover 65404071. Built strictly to original equipment tolerances, it delivers uniform perimeter clamping pressure against the right door weatherseal, preventing cab rattles, wind noise, draft ingress, exhaust fumes, and fine field dust contamination. It offers direct plug-and-play fitment across widespread Case IH tractor models (94 series, A-Familie, CX, D-Linie, Maxxum 5100/5200, MX / MX Maxxum) and Deutz-Fahr tractor lines (07C series, DX, DX 4, DX 6, DX 7, and Intrac 2004).

Key Features & Engineering Advantages

• Two-Stage Positive Rotary Safety Catch: Progressive two-position latching cycle (initial capture and full lock) prevents accidental door unlatching under harsh field vibrations, engine harmonics, and rough terrain haulage.
• Direct Multi-Brand Fitment for Right-Hand Door (Case IH / Deutz-Fahr): Mounting hole centers, backset, and linkage pivot points strictly conform to original cab door profiles, ensuring seamless bolt-on fitment without drilling, slotting, or rod re-engineering.
• Anti-Corrosion Tropicalized Zinc Plating: Rugged metallic casing and internal pivot pins resist oxidation, moisture, acidic agrochemicals, mud, and high-pressure steam cleaning.
• High-Tensile Internal Return Spring Pack: Calibrated spring pack delivers crisp, low-effort handle return, eliminating handle rattle, sag, and sticky mechanical actuation from both inside and outside the cab.
• Acoustic & Climate Cab Insulation: Exerts uniform clamping force on the perimeter door rubber seal of the passenger-side door, ensuring full cab soundproofing and maintaining climate control pressurization.

Technical Specifications

Equipment Compatibility & Tractor Application Guide

Manufacturer	Tractor Series	Supported Tractor Models
Case IH	94 Series & D-Linie Series	1194, 1294, 1394, 1494, 1594, 1694 • D 440
	A-Familie Series	440, 540, 640, 740, 840, 940 (1/90-12/92)
	CX Series	CX 50, CX 60, CX 70, CX 80, CX 90, CX 100
	Maxxum 5100 Series	Maxxum 5120, Maxxum 5130, Maxxum 5140, Maxxum 5150
	Maxxum 5200 Series	Maxxum 5220, Maxxum 5230, Maxxum 5240, Maxxum 5250
	MX & MX Maxxum Series	MX 80C, MX 90C • MX 100 Maxxum, MX 110 Maxxum, MX 120 Maxxum, MX 135 Maxxum, MX 150 Maxxum, MX 170 Maxxum
Deutz-Fahr	07C Series	D 4507C, D 4807C, D 5207C, D 6007C, D 6207C, D 6507C, D 6807C, D 6907C, D 7007C, D 7207C, D 7807C
	DX Series	DX 80, DX 85, DX 86, DX 90, DX 92, DX 110, DX 120, DX 145, DX 160
	DX 4 Series	DX 4.10, DX 4.30, DX 4.50, DX 4.70
	DX 6 Series	DX 6.05, DX 6.10, DX 6.30, DX 6.50
	DX 7 Series	DX 7.10
	Intrac Series	Intrac 2004

Installation Advice & Workshop Notes: Before installation, dismantle the interior door trim panel on the RH door to reveal the latch pocket, and carefully unclip the linkage rods linking the exterior handle and the inside release mechanism. Unbolt the mounting fasteners from the door profile and remove the old latch unit. Position the new 65404009 latch mechanism, reconnect all operating linkage rods, and verify that they actuate freely without bending or binding. Tighten mounting screws securely, then align the striker pin on the cab B-pillar: the door should catch cleanly on the initial safety catch and close into the full lock position with moderate pressure, fully compressing the perimeter rubber seal. Periodically lubricate internal moving pawls and pivot points with white lithium grease or water-resistant PTFE spray before reinstalling the interior protective cover (part 65404071).