Wood Furnace Front or Rear Liner | Part #40258 / 20265 | Cast Iron Trapezoidal Panel for US Stove, Clayton, Johnson & Vogelzang (18-5/8" to 10" x 8-7/8")

Wood Furnace Front or Rear Liner (40258 / 20265) – Cast Iron Trapezoidal Panel for US Stove, Clayton, Johnson & Vogelzang (18-5/8" to 10" x 8-7/8")

Protect your firebox and restore heating efficiency with the 40258 / 20265 Front or Rear Liner. This heavy-duty trapezoidal cast iron panel is designed for select wood and coal-burning furnaces from US Stove, Clayton, Johnson, and Vogelzang. Built to withstand intense heat, it extends the life of your furnace by shielding interior walls from direct flame exposure.

Key Features:

• OEM Replacement – Genuine US Stove Company part for reliable fit and performance
• Dual Fitment – Works as either front or rear liner depending on model
• Heavy-Duty Cast Iron – Resists warping and cracking under high temperatures
• Trapezoidal Design – Precisely shaped to match firebox contours
• Easy Installation – Simple replacement for worn or damaged liners

Specifications:

• Part Numbers: 40258 / 20265
• Dimensions: 18-5/8" (top width) tapering to 10" (bottom width) x 8-7/8" height
• Material: Solid cast iron
• Weight: Approx. 13.5 lbs
• Application: Firebox liner (front or rear)
• Sold: Individually

Fitment by Application:

Front Only: HotBlast 1400
Rear Only: HotBlast 1500, 1537, 1537G, 1537M, 1557, 1557M
Front & Rear: Johnson J9000
Rear Only: Johnson J9900

Compatible Stove Models:

Clayton: 1537Q
US Stove HotBlast: 1400 (Front), 1421, 1500 (Rear), 1527, 1537, 1537G, 1537M, 1557
Johnson Furnaces: J9000 (Front & Rear), J9900 (Rear)
Vogelzang: Norseman VG2500

Note: Always consult your owner's manual to confirm part number and placement before ordering.

Pairs Well With: Shaker grate frames, shaker grate sections, firebrick, ash pans, Vogelzang Parts and US Stove Company Parts

Why Choose the 40258 / 20265 Cast Iron Furnace Liner?

Cracked or deteriorated firebox liners expose furnace walls to direct flame and extreme heat, which can shorten furnace life and compromise safety. Replacing damaged liners with this OEM cast iron firebox panel restores proper protection, improves heat containment, and helps ensure reliable, long-term furnace operation.

Installation Instructions:

Allow the furnace to cool completely before servicing. Ensure all embers are extinguished and remove ash from the firebox.

Open the firebox door and locate the existing front or rear liner. Remove any retaining bolts, clips, or brackets securing the liner in place.

Carefully lift or slide the old liner out of the firebox. Use caution, as cast iron panels are heavy.

Clean the firebox wall and mounting surfaces to remove ash and debris. Inspect surrounding firebox components for cracks or excessive wear.

Position the new cast iron trapezoidal liner in the correct orientation for front or rear placement. Align mounting points and ensure the liner sits flush against the firebox wall.

Secure the liner using the original hardware or approved replacements. Verify there is no movement or interference before closing the firebox.

Resume normal furnace operation.

Installation tip: Never operate a furnace with cracked, missing, or improperly installed liners. Doing so can cause permanent firebox damage.

Helpful Installation Videos:

US Stove furnace internal component replacement overview (liners, grates, frames):
https://www.youtube.com/watch?v=mD6U69ZnJ5k

Wood and coal furnace firebox inspection and maintenance example:
https://www.youtube.com/watch?v=SZ_bY_k7akk

These videos demonstrate firebox access, internal component removal, and reinstallation commonly used in US Stove, Clayton, Johnson, and Vogelzang furnaces. While they may not reference the 40258 liner specifically, the installation process is similar for cast iron firebox liner panels.