Leistritz L3MF Service Kit 5601322 | OEM Mechanical Overhaul Kit

Leistritz L3MF Service Kit 5601322

The Leistritz L3MF Service Kit 5601322 is a precise maintenance assembly, important for major overhauls of Leistritz L3MF positive displacement triple screw pumps. Designed to satisfy the harsh demands of maritime engine rooms and automated fuel modules, and high-pressure industrial fluid loops, this kit provides the high-wear mechanical boundary components critical to restoring the volumetric efficiency and volumetric sealing of the design-basis.

This service kit replaces damaged elastomeric borders, retaining parts and anti-friction bearings to counteract impacts of boundary friction, fluid contamination and continuous pressure gradients. An improved mechanical shaft seal ring protects the primary driveshaft from systemic vacuum loss on the suction flank and fluid leakage at the pressure boundary. The components in this kit are built to structural tolerances capable of withstanding extreme heat gradients and continuous chemical exposure from heavy residual fuel oils (HFO), marine diesel oils (MDO) and synthetic lubricants.

Technical Details: Service Kit 5601322

 Main Features

1. Matched Assembly of Complete Component: All key internal boundary parts, retaining rings and primary bearings are integrated into one unified part number to assure zero assembly mismatches.
2. High Viscosity Mechanical Shaft Seal: Engineered to maintain structural integrity throughout wide ranges of fluid temperatures up to 180 degrees C, to prevent the axial escape of fluid beyond the pump drive shaft.
3. Deep Groove Heavy Duty Bearing: Contains a precisely machined internal radial ball bearing for the compensation of unbalanced residual hydraulic thrust and shaft deflections.
4. Elastomeric Sealing Resilience The shaft seal material is resistant to shearing forces of high-viscosity media up to 5,000 cSt and provides structural stability.
5. Hardened Steel Retention Elements Standardized DIN-compliant internal and external snap rings intended to positively lock the internal rotating assembly without slipping under strong vibration loads.

Usage:

1. Marine Main Propulsion Overhauls: Periodic maintenance of L3MF main engine lube oil circulation pumps deployed across low and medium-speed commercial vessels.
2. Fuel Oil Module Maintenance: Servicing booster, purifier feed, and high-volume fuel transfer modules managing Marine Gas Oil (MGO) and heavy distillate mixtures.
3. Industrial HPU Refurbishment: Restoring system performance in large-scale industrial hydraulic power units experiencing pressure drops due to shaft seal bypass.
4. Power Generation Station Support: Maintenance schedules for turbine bearing oil circulation pumps subject to high operational duty cycles.
5. Shipyard Drydock Recertification: Mandatory major pump servicing routines implemented during vessel classification surveys and standard shipyard intervals.

Part Number Cross-References & Set Composition

Manufacturer Part Number (MPN): 5601322

OEM Part Breakdown Code: Kit 5601322 comprises the following certified internal factory components:

• 1x Ball Bearing: Position #170 (Material No.: 0081446)
• 1x Shaft Seal Ring: Position #52 (Material No.: 0037718)
• 1x Internal Circlip: Position #53 (Material No.: 0070490)
• 1x External Circlip: Position #173 (Material No.: 0070422)

Equipment Compatibility

This service kit is engineered to restore specific configurations of the Leistritz L3MF pump family. It offers exact engineering compatibility with the following targeted models:

Leistritz Pump Models:

• L3MF-090/112-IFOKOO-W
• L3MF-090/152-IFOKOO-W
• L3MF-090/180-IFOKOO-W

Design Configurations: Optimized specifically for internal bearing architecture units (Design Designation I) utilizing media-lubricated configurations running alongside standard mechanical seal housings.

Assembly & Maintenance Guide:

• Circlip Seating Verification: When securing the internal assembly using Circlip #53 and Circlip #173, always ensure the retaining rings click firmly and square within their respective structural groove geometries. Use precision external/internal circlip pliers to prevent over-stretching the rings, which can permanently deform the metal and lead to axial play during high-pressure operation.
• Shaft Seal Orientation Strategy: When sliding Shaft Seal Ring #52 (Material No. 0037718) over the primary driveshaft keyway, ensure the sealing lip faces the internal fluid cavity rather than the external drive side. Wrap a thin layer of specialized assembly tape or use a dedicated installation sleeve over the sharp edges of the driveshaft keyway slot to avoid slicing or scoring the fresh elastomer boundary during installation.
• Pre-Lubrication Protocol: Never slide dry elastomeric or bearing elements together during rebuilding stages. Coat the bearing races and the shaft seal lip with a clean layer of high-temperature system lube oil before final housing torque-down to guarantee immediate lubrication protection upon initial motor start-up.