BOCK 08795 Oil Pump Assembly for F14 / F16 Compressors

BOCK 08795 Complete Oil Pump Assembly for F14 & F16 Series Compressors

The BOCK 08795 (Danfoss code 097B08795) is a heavy-duty, direct-drive positive-displacement lubrication oil pump engineered specifically for the BOCK F-Series (F14, F16, FX14, FX16) open-type reciprocating compressors. In commercial marine refrigeration, cargo reefer plants, and stationary industrial cold chains, maintaining hydrodynamic journal and crankpin bearing lubrication under fluctuating thermal loads is critical to prevent catastrophic mechanical seizure.

The 08795 pump features an integrated reversing mechanism that guarantees continuous, unidirectional oil delivery regardless of crankshaft rotational direction. Driven directly from the compressor crankshaft end cover, it draws oil from the high-capacity crankcase sump through an internal suction strainer, discharging pressurised lubrication fluid through the crankshaft drillings to feed connecting rod small-end bushings, main journal bearings, and the mechanical shaft seal assembly. Designed to handle high dynamic marine conditions, the pump maintains reliable differential oil pressure across steep vessel operational angles of up to 30° roll and pitch.

Technical Specifications

Key Features

1. Direction-Independent Hydrodynamic Pumping: Equipped with an automatic mechanical reversing vane/slide that delivers uninterrupted forward discharge regardless of clockwise or counter-clockwise crankshaft rotation.
2. Integrated Pressure Relief Regulation: Internal relief valve regulates line delivery pressure between 1.5 and 3.5 bar differential above suction, avoiding seal blow-out during cold viscosity start-ups.
3. Direct Drive Transmission: Coupled directly to the compressor shaft without belts or secondary gears, removing slip hazards and minimizing maintenance failure points.
4. Precision Sensor & Gauge Tap Ports: Factory-machined tapping accommodates differential oil pressure safety switches (Danfoss/BOCK MP55, OPS2) and analogue test gauges without additional manifold modifications.
5. Marine Tilt Resistance: Calibrated suction channel interfaces seamlessly with BOCK deep-sump extensions, maintaining oil pickup during dynamic vessel motion up to 30°.

Part Number Cross-References

• Danfoss / Current BOCK Global Part Number: 097B08795
• Legacy GEA BOCK Reference: 08795 / 8795
• Related Gasket / Service O-Ring Kit: BOCK 08796 / 08797 (Front Bearing Cover Endplate Gasket)

Frequently Asked Questions

Does the BOCK 08795 oil pump require a specific direction of shaft rotation?

No. The BOCK 08795 oil pump features an automatic reversing slide mechanism. Regardless of whether the compressor crankshaft rotates clockwise or counter-clockwise, the internal ports shift dynamically to draw from the sump and discharge uninterrupted lubrication pressure into the crankshaft galleries.

What is the difference between part number 08795 and 097B08795?

They designate the same core component. Number 08795 is the traditional GEA BOCK manufacturing identifier, while 097B08795 is the Danfoss inventory item number following Danfoss’s acquisition of BOCK. Both refer to the identical complete oil pump assembly for F14/F16 series compressors.

Can this pump assembly be used with ammonia (NH3) or hydrocarbons?

The 08795 pump features cast iron and hardened carbon steel internals, making the pump body chemically compatible with most refrigerants. However, confirm that the housing gasket materials and the compressor’s mechanical shaft seal are rated for your specific fluid class (e.g., Neoprene or HNBR for Freon vs. PTFE/special elastomers for Ammonia or Hydrocarbons).

When should a compressor oil pump be replaced instead of overhauled?

Replace the complete 08795 pump assembly if there is observable gear pocket cavitation wear, severe axial scoring on the inner cast iron mounting face, or when bearing metal debris has cycled through the pump following a journal failure. In critical marine applications, installing a certified factory-tested assembly is recommended over field repairs to guarantee reliable pressure delivery at sea.