DeWalt AB-4105028 Dipstick – Genuine OEM Replacement Air Compressor Oil Dipstick

Part Number: AB-4105028
Category: Air Compressor Parts & Accessories → Pump Components → Oil Dipsticks
Type: DeWalt AB-4105028 Dipstick – Genuine OEM Replacement Air Compressor Oil Dipstick

The DeWalt AB-4105028 Dipstick is a genuine OEM replacement oil-level component designed for compatible DeWalt air compressors. This dipstick allows the operator to check the compressor pump’s lubricant level and helps seal the oil-fill opening during operation. Manufactured to original equipment specifications, it provides a direct replacement for a lost, cracked, worn, or damaged dipstick and supports proper compressor-pump maintenance.

Key Features & Benefits

• Part Number: AB-4105028
• Genuine OEM DeWalt replacement part
• Replacement oil dipstick for compatible air compressors
• Allows convenient compressor-pump oil-level inspection
• Helps maintain the proper lubricant level
• Helps seal and protect the oil-fill opening
• Supports reliable pump lubrication and operation
• Ideal for replacing a lost, cracked, worn, or damaged dipstick
• Direct-fit OEM replacement
• Manufactured to original equipment specifications

Technical Specifications

• Part Number: AB-4105028
• Manufacturer: DeWalt
• Product Type: Air Compressor Oil Dipstick
• Application: Compressor-pump oil-level inspection and fill-opening closure
• OEM Part: Yes
• Quantity: Sold Individually

Compatible Applications

The DeWalt AB-4105028 Dipstick is designed for compatible DeWalt air compressors equipped with an oil-lubricated pump that uses this specific dipstick configuration.

Always verify your air compressor model, type number, pump model, parts diagram, and original part number before ordering to ensure proper compatibility.

Function of the Oil Dipstick

The AB-4105028 Dipstick is a compressor-pump maintenance component used to:

• Measure the lubricant level inside the compressor pump
• Help prevent operation with insufficient oil
• Help prevent pump overfilling
• Seal and protect the oil-fill opening
• Reduce exposure to dust, debris, and contaminants
• Support proper pump lubrication and cooling
• Restore convenient oil-level monitoring

Maintaining the correct oil level helps reduce internal friction, control operating temperatures, and support dependable compressor-pump performance.

Common Signs Replacement Is Needed

Replace or inspect the oil dipstick if you notice:

• Dipstick is missing
• Handle or stem is cracked or broken
• Oil-level markings are worn or unreadable
• Threads are stripped or damaged
• Dipstick does not seat securely
• Oil leaks around the fill opening
• Seal or O-ring is worn or damaged
• Dirt or debris can enter around the dipstick opening

A damaged or missing dipstick can make oil-level checks difficult and may allow contaminants to enter the compressor pump.

Installation & Service Notes

Disconnect the air compressor from its power source, allow the unit to cool, and release stored tank pressure before beginning service. Place the compressor on a stable, level surface to obtain an accurate oil-level reading.

Remove the existing dipstick, clean the oil-fill opening, and inspect the surrounding threads and seal area for damage. Install the DeWalt AB-4105028 Dipstick according to the manufacturer’s instructions. When checking the oil level, follow the procedure specified in the compressor owner’s manual, as some dipsticks must be inserted without threading while others must be fully seated.

Important: Always verify your air compressor model, pump configuration, and original part number before ordering. Use only the oil type and quantity recommended by the manufacturer. Never operate the compressor with the oil level below or above the specified range.

Maintenance Recommendations

• Check the compressor-pump oil level before regular operation
• Position the compressor on a level surface before checking the oil
• Keep the dipstick and oil-fill area clean
• Wipe the dipstick with a clean, lint-free cloth
• Maintain the oil level within the manufacturer’s specified range
• Change the pump oil at the recommended service intervals
• Inspect the dipstick seal or O-ring for wear
• Use genuine OEM replacement parts to maintain proper fit and dependable performance