EQ Systems AM 20 Hydraulic Cylinder | Part 1480EQ | 20" Stroke | 4" AM/CM Series Jacks

Replace a leaking, pressure-losing, or non-holding AM series 20" stroke hydraulic cylinder in your EQ Systems tube-in-tube trailer jack with the EQ Systems AM 20 Cylinder (Part 1480EQ). The cylinder is the working part inside the 4" square outer tube — outer tube, brackets and foot stay on the trailer; only the cylinder gets swapped. Available at The RV Surplus.

Fitment critical: Verify cylinder configuration before ordering. Call EQ Systems at 800-846-9659.

⭐ 20" Stroke AM/CM Series Replacement

• Fits AM and CM series tube-in-tube jacks
• 20" stroke, 2.5" cylinder bore
• For jacks with a 4" square outer tube 28½" long
• Jack capacity: 12,000 lbs (each jack)

⭐ Identifying the Right Cylinder

Cylinders are identified by the outer tube of the jack, not by the bracket. Jacks of the same size can carry different brackets and still take the same cylinder. Measure the square dimension of the outer tube and its length:

• 4" square × 24½" long = 16" stroke (Part 1140)
• 4" square × 28½" long = 20" stroke AM (this cylinder, 1480)
• 4" square × 32½" long = 24" stroke (Part 1179)
• 4" square × 38½" long = 30" stroke (Part 1481)
• 4" square × 50½" long = 42" stroke (Part 1160)

⭐ Check Your Fittings — NPTF vs SAE

Older cylinders were built with NPTF fittings; current production uses SAE. Quick check:

• SAE: no threads exposed between the cylinder body and the hex
• NPTF: threads exposed between the cylinder body and the hex

This cylinder has shipped with both types over its life. If your jack has NPTF fittings, call EQ Systems at 800-846-9659 before ordering so the correct replacement fittings go out with the cylinder.

Documents

• Hydraulic Cylinder Identification for Tube-in-Tube Jacks (PDF)
• EQ Systems Hydraulic Jack Options, Commercial Range (PDF)
• Required Maintenance Items for EQ Hydraulic Jacks & Slide Systems (PDF)

Other Cylinders

• AM 16 Cylinder (1140EQ) — 16" stroke, 4" tube
• AM 24 Cylinder (1179EQ) — 24" stroke, 4" tube
• AJ 70 Cylinder (2505EQ) — AJ series (3.5" tube)
• TJ Replacement Cylinder (1218EQ) — TJ tongue jack

Related AM Series Jacks

• AM 2/24 Dual Leg — complete AM series trailer jack system
• AM 1/24 Single Leg — single-leg AM system

90-Day Warranty

Backed by EQ Systems' 90-day replacement part warranty. Check documentation for full terms.

Specifications

• Brand: EQ Systems
• Model: AM 20 Cylinder
• SKU: 1480EQ
• Jack Series: AM/CM tube-in-tube
• Stroke: 20"
• Cylinder Bore: 2.5"
• Fits Outer Tube: 4" square × 28½" long
• Jack Capacity: 12,000 lbs
• Fittings: NPTF or SAE (verify before ordering)
• Warranty: 90-day replacement part warranty