Husqvarna 586138004 21" Black Rear Door – Replacement Lawn Mower Rear Discharge Door Component

Part Number: 586138004
Category: Lawn Mower Replacement Parts
Type: 21" Black Rear Door – Replacement Lawn Mower Rear Discharge Door Component

The Husqvarna 586138004 21" Black Rear Door is a replacement rear discharge component designed for compatible Husqvarna 21-inch lawn mower configurations. Installed at the rear discharge area of the mower deck, this door helps cover and manage the rear discharge opening while supporting the intended grass collection or discharge configuration. Ideal for replacing a cracked, broken, warped, damaged, worn, or missing rear door, the 586138004 helps restore proper rear-deck closure and mower operation.

Product Specifications

• Part Number: 586138004
• Brand: Husqvarna
• Product Type: Rear Door
• Mower Application: 21"
• Color / Finish: Black
• Component Type: Replacement Lawn Mower Rear Discharge Door Component
• Application: Lawn Mowers
• System: Mower Deck, Rear Discharge & Grass Collection System
• Function: Rear Discharge Opening Coverage, Grass Catcher Interface & Component Protection
• Condition: New

Features & Benefits

• Replacement rear door for compatible Husqvarna lawn mowers
• Designed for applicable 21-inch mower configurations
• Features a black color/finish
• Installs at the rear discharge area of the mower deck
• Helps cover the rear discharge opening during applicable mower operating configurations
• Supports the intended interface with compatible grass collection components where applicable
• Helps contain and direct discharged grass clippings within the mower's designed system
• Suitable for replacing a cracked, broken, warped, worn, damaged, or missing rear door
• Useful for mower deck, discharge-system, and grass catcher repairs
• Direct replacement option when Husqvarna part number 586138004 is specified

Applications

• Husqvarna lawn mowers
• Compatible Husqvarna 21" mower configurations
• Walk-behind lawn mowers where specified
• Rear-discharge mower systems
• Grass collection systems
• Rear mower deck assemblies
• Grass catcher interface applications
• Mower deck maintenance and repair
• Replacement of damaged rear discharge doors
• Applications specifying Husqvarna 586138004

Important Notes

• Verify part number 586138004 before ordering
• Confirm compatibility with your specific Husqvarna lawn mower model, mower deck, and rear discharge configuration
• This component is identified for a 21" mower application; the 21-inch designation should be treated as an equipment or deck application reference and not necessarily the exact physical width of the rear door
• The exact overall width, height, thickness, material, hinge dimensions, pivot locations, mounting-hole configuration, spring interface, latch features, and compatible mower models are not identified in the supplied product information
• The supplied information identifies the component as black, but the exact surface texture, material composition, or finish specification is not identified
• Compare the original rear door's overall shape, hinge or pivot points, mounting locations, spring connections, grass bag interface, discharge opening, and installation orientation
• Do not select a rear door based solely on the 21" mower designation, color, or approximate appearance
• Inspect associated hinge pins, pivot points, springs, brackets, mounting tabs, discharge openings, grass catcher frames, grass bags, handles, retainers, and mounting hardware for wear or damage
• A damaged rear door or worn hinge mechanism may prevent the door from closing, pivoting, or interfacing correctly with the grass collection system
• If the original door does not close properly, inspect for broken springs, bent hinges, worn pivot points, grass buildup, debris, damaged mounting tabs, or interference from other components
• Do not operate the mower if the rear discharge door or other required guards, shields, deflectors, or grass collection components are missing, damaged, or incorrectly positioned
• Do not drill, cut, grind, heat, bend, or otherwise modify the rear door to force compatibility
• This listing is for the 21" black rear door; do not assume that hinge pins, springs, brackets, grass bags, catcher frames, discharge chutes, handles, retainers, or mounting hardware are included unless specifically stated
• Shut off the mower, disconnect the spark plug or remove the battery as appropriate, and wait for the blade to stop completely before servicing the rear discharge area
• Keep hands and other body parts away from the mower discharge opening and cutting area at all times while the blade may be moving
• After installation, verify proper door fitment, hinge or pivot movement, spring return where applicable, mounting security, discharge-opening coverage, grass catcher interface, and clearance from moving components before returning the mower to normal service