OEM replacement hydraulic cylinder for EQ Systems CT series tube-in-tube jack legs. 20" stroke. Compatible with SAE and NPTF fittings. Direct drop-in replacement for the CT series.
The EQ Systems 1178 is the OEM replacement hydraulic cylinder for CT series tube-in-tube jack legs with a 20" stroke. When the internal cylinder seals wear out — causing the jack leg to drift from its extended or retracted position, lose lifting force, or fail to hold under load — replacing the cylinder returns the jack to full operating condition without replacing the entire assembly.
The CT series is a heavier-duty tube-in-tube jack platform than the SM or AM series, reflected in the cylinder's larger weight. The fittings are compatible with both SAE and NPTF hydraulic hose fitting types, accommodating variations across different model year installations.
The 1178 is a direct replacement for CT series jack legs with a 20" stroke. CT, SM, and AM series cylinders are not interchangeable — dimensions, bore size, and mounting differ between series. Use the Hydraulic Cylinder Identification Chart for Tube-in-Tube Jacks available through EQ Systems service and support documentation to confirm the correct cylinder for your jack, or contact EQ Systems technical support with your jack model number.
The 1178 cylinder fittings have been used with both SAE (straight thread O-ring) and NPTF (tapered pipe thread) fitting types. This dual compatibility accommodates the range of hydraulic hose configurations found on CT series jacks across different production years, reducing the need for additional adapters in most installations.
Have your jack model number ready when contacting EQ Systems support. EQ Systems provides a Hydraulic Cylinder Identification Chart for Tube-in-Tube Jacks through their service and support documentation to help confirm the correct part. Technical Support: EQ Systems Toll Free: 1-800-846-9659 Local: 574-264-3437 Hours: Monday–Friday, 7AM–4PM EST Manufacturer: EQ Systems — 19300 Grange St, Cassopolis, MI 49031