Rexroth Hydraulic Pump Seal Kit: Selection & Installation Tips

Bosch Rexroth hydraulic pumps are built to demanding specifications, and maintaining them properly requires equally precise sealing components. A genuine or OEM-equivalent Rexroth hydraulic pump seal kit is one of the most cost-effective investments a maintenance team can make — far cheaper than bearing damage or shaft scoring caused by a slow, ignored leak.

Identifying the Correct Kit

Rexroth pump families — A10V, A4V, A7V, and the gear pump GFT series among others — each use distinct seal geometries. Before ordering, confirm your pump's full model number from the nameplate. The key parameters are shaft diameter, port thread specification, and housing material (aluminum vs. iron), which influence o-ring groove dimensions and required hardness.

Pre-Installation Checklist

Clean the work area thoroughly. Even a small piece of grit introduced during reassembly can score a new seal within hours. Use clean, lint-free cloths and flush all mating surfaces with filtered hydraulic fluid before fitting new seals. Never use grease or petroleum jelly on seals destined for phosphate-ester systems.

Common Installation Mistakes

Twisting a lip seal during installation is one of the most frequent errors. Use a proper seal driver or a smooth mandrel to press seals in squarely. Lip direction matters — the primary lip should face the pressure side. Installing it backwards results in immediate leakage.

Torquing bolts unevenly is another issue. Always follow a star pattern and use a calibrated torque wrench. Uneven clamping distorts housings and creates leak paths that no seal can compensate for.

HOVOO / HOUFU Seal Kits for Rexroth Pumps

HOVOO maintains an extensive inventory of Rexroth hydraulic pump seal kits covering the most widely deployed pump models in industrial and mobile hydraulic applications. Our kits use FKM and NBR compounds sourced from qualified rubber manufacturers, with every batch traceable to material certificates.

Proper hydraulic pump seal replacement extends service life, reduces fluid loss, and keeps your operation running without unplanned downtime. For selection assistance or bulk pricing, reach out through hovooseal.com.

Source: www.hovooseal.com