Black & Decker / DeWalt 90560170N Guard Assembly – Genuine OEM Replacement String Trimmer Safety Guard

Part Number: 90560170N
Category: Lawn & Garden Parts → String Trimmer Parts → Safety Guards
Type: Black & Decker / DeWalt 90560170N Guard Assembly – Genuine OEM Replacement String Trimmer Safety Guard

The Black & Decker / DeWalt 90560170N Guard Assembly is a genuine OEM replacement safety guard designed for compatible Black & Decker 20V MAX®, 18V, and EASYFEED® string trimmers and edgers. Manufactured from durable, impact-resistant molded plastic, this guard mounts around the trimmer head to help shield the operator from flying grass, stones, and debris while also supporting the line-cutting blade that maintains the correct trimming line length. Built to original equipment specifications, it provides a direct-fit replacement for cracked, damaged, or missing guards, restoring the trimmer's original safety and cutting performance.

Key Features & Benefits

• Part Number: 90560170N
• Genuine OEM Black & Decker / DeWalt replacement part
• Replacement string trimmer safety guard assembly
• Helps protect the operator from flying debris
• Supports the integrated line-cutting blade
• Durable impact-resistant molded plastic construction
• Direct-fit OEM replacement
• Manufactured to original equipment specifications

Technical Specifications

Part Number: 90560170N

Manufacturer: Black & Decker / DeWalt

Product Type: Guard Assembly

Material: Impact-Resistant Molded Plastic

Application: String Trimmer / Edger

OEM Part: Yes

Quantity: Sold Individually

Approximate Dimensions: 12.00" × 6.95" × 2.95"

Compatible Applications

The Black & Decker / DeWalt 90560170N Guard Assembly fits compatible string trimmers and edgers, including:

Black & Decker

• LSTE523 20V MAX® Lithium EASYFEED® String Trimmer/Edger (Type 1)
• LSTE525 20V MAX® Lithium EASYFEED® String Trimmer/Edger + 2 Batteries (Type 1)
• NST2118 18V 12" Trimmer/Edger (Type 1)
• LST220 20V MAX® Lithium 12" Trimmer/Edger (Type 1)
• LST522 20V MAX® Lithium 12" 2-Speed String Trimmer/Edger (Type 1)
• LST120 Type 1 String Trimmer
• LST220FC-AR Type 1 String Trimmer
• LST220FC-B2C Type 1 String Trimmer
• LST220FC-B3 Type 1 String Trimmer
• LST220FC-BR Type 1 String Trimmer
• LSTE520 Type 1 String Trimmer

Always verify your model number, type number, and original part number before ordering to ensure proper compatibility.

Function of the Guard Assembly

The 90560170N Guard Assembly is designed to:

• Shield the operator from flying grass, stones, and debris
• Support safe string trimming operation
• House the line-cutting blade that maintains proper line length
• Help direct grass clippings away from the user
• Protect nearby plants and objects from excessive line contact
• Restore the trimmer's original safety features

Using a genuine OEM replacement guard helps maintain factory safety standards and proper trimming performance.

Common Signs Replacement Is Needed

Replace the guard assembly if you notice:

• Cracked or broken guard
• Missing guard assembly
• Damaged or missing line-cutting blade
• Broken mounting tabs
• Loose or unstable guard
• Excessive wear from ground contact

Operating a string trimmer with a damaged or missing guard increases the risk of debris being thrown toward the operator and may reduce trimming performance.

Installation & Service Notes

Remove the battery or disconnect power before servicing the trimmer.

Turn the trimmer upside down to access the cutting head. Position the 90560170N Guard Assembly onto the motor housing, ensuring the guide tabs engage the matching ribs. Slide the guard forward until it snaps securely into place, then install and tighten the retaining screw with a Phillips screwdriver. Verify that the guard is firmly attached and properly aligned before operating the trimmer. Installation requires only a Phillips screwdriver and typically takes just a few minutes.

Important: Always verify your trimmer model and original part number before ordering. Never operate the trimmer without the guard assembly installed. Inspect the line-cutting blade and mounting hardware whenever replacing the guard, and use only genuine OEM replacement parts to maintain factory safety and performance.

Maintenance Recommendations

• Clean grass and debris from the guard after each use.
• Inspect the guard regularly for cracks or damaged mounting tabs.
• Verify that the retaining screw remains securely tightened.
• Check the line-cutting blade for wear during spool replacement.
• Replace damaged guards immediately to maintain safe operation.
• Use genuine OEM replacement parts to maintain factory fit, operator protection, and long-term string trimmer performance.