11178087 Overhaul Seal Kit H1p089/100

Premium Danfoss 11178087 Hydraulic Seal Kit (for H1P089 & H1P100 Pumps)
The Danfoss 11178087 Seal Kit is a comprehensive, factory-grade fluid power
restoration solution engineered specifically for Danfoss H1-Series variable
displacement axial piston pumps, specifically the H1P089 and H1P100 frames.
This complete overhaul Hydraulic Pump Seal Kit is critically required by
hydraulic equipment rebuild facilities, heavy machinery fleet maintenance
managers, and regional fluid power parts distributors who demand zero-
compromise sealing integrity under extreme system pressures.
Operating at modern system pressures up to 480 bar (6,960 psi), high-cycle
hydrostatic transmissions rely on flawless sealing to prevent catastrophic
volumetric efficiency loss, internal cross-port leakage, and environmental oil
contamination. This heavy-duty sealing kit provides an exact-fit configuration
to completely rebuild the pump’s pressure boundaries, control valves, and
shaft interfaces.
Critical Sealing Components Included
Every component in the 11178087 matrix is manufactured to strict geometric
tolerances to survive the high dynamic stresses inside H1P pumps:
High-Pressure Shaft Seal: A reinforced, spring-loaded rotary lip seal
engineered to handle variable housing case pressures without lip inversion or
premature hardening.
Control Valve & EDC O-Rings: Micro-dimensioned seals designed for the
Electrical Displacement Control (EDC) blocks, preventing control fluid bypass
and maintaining precise swashplate positioning.
Housing Cradle & Interface Seals: Heavy-duty static sealing rings that lock
the main pump segments together, eliminating external oil weeping and
preventing environmental grit from migrating into the high-purity hydraulic
fluid.
Anti-Extrusion PTFE Backup Rings: Positioned adjacent to high-pressure O-rings
to absorb mechanical clearance gaps under maximum load, preventing elastomer
tearing or flattening.

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