CASTROL Molub-Alloy 880 LF Heavy

Description

Castrol Molub-Alloy 880 LF Heavy Walking Cam Lubricant was developed specifically for use on Monighan

Walking Cam mechanisms of large surface mining equipment. Unlike the conventional asphaltic base lubricants,

Molub-Alloy 880 LF Heavy exhibits exceptional plasticity and adherence to bearing surfaces over a wide

temperature range because of its unique combination of oils and adhesive and tackiness agents.

During a relocation (walk), the Monighan cam bearing surfaces are in combined sliding and rolling motion in line

contact only. The pressure actually exceeds the yield strength of the metal at contacting asperities (microscopic

high spots) creating the potential for high temperature and metal welding. A high content of a proprietary blend of

Molub-Alloy solid lubricants not only serves to strengthen the film structure, but also helps to reduce contact

temperatures and metal welding.

The combined action of the film-forming anti-weld components of Molub-Alloy 880 LF Heavy help to eliminate

chatter and vibration during walks as well as reducing friction, wear, and the resultant high costs of repairs and

downtime.

Molub-Alloy 880 LF Heavy is part of Castrol Performance Lubricants’ Eco-Solutions™ product offering.

Formulated to address environmental concerns, it is free of lead, chlorinated solvents, and barium.

Molub-Alloy 880 LF Heavy is manufactured from a select, high viscosity petroleum oil together with other, nonasphaltic, petroleum constituents; these are further fortified with adhesive and tackiness agents plus an inorganic

thickener chosen for its flow and film-forming characteristics.

Metallic lubricating solids of specific grade and size distribution are treated to increase their natural positive affinity

to metal surfaces and are completely dispersed to assure their effectiveness.

The unique formulation of Molub-Alloy 880 LF Heavy accounts for the building, under extreme sliding-rolling

pressures, which resists “melting“ or “squeezing“ out as well as wiping or washing off through a broad range of

ambient temperatures and climatic conditions.

Application

The primary application for which Molub-Alloy 880 LF Heavy was intended is to lubricate the Monighan Walking

Cam mechanism. It does, however, serve to lubricate other bearing surfaces in slow relative motion where

pressures are sufficiently high to cause metal deformation at asperities with possible seizure and galling. Typical

examples would be heavy sliding mechanisms or large open gears possibly exposed to shock load and high

ambient temperatures.

Heavy duty pressure dispensing equipment may be used if the temperature of the system can be maintained at 90

to 95°F (32 to 28°C, see Notes). The product requires no heating to be applied manually with relative ease.

For simplified and safe hand application to the Monighan cam during a walk, Molub-Alloy 880 LF Heavy is

available in polyethylene bags. A gas is dropped into the mechanism just prior to the meshing of the two bearing

surfaces; under the tremendous and instantaneous temperature rise, the package disintegrates to become an

effective part of the lubricating film.

Advantages

Contains no asphaltic materials or solvents. Applies readily without the need to “melt” or add diluent. (Potential fire

hazards are eliminated).

The lubricating film remains tough and firm at high temperatures yet pliable and resistant to cracking or peeling

when cold. Nor will dirt and abrasives adhere easily to the semi-dry film surface.

Smoother relocation walks are made possible by the Molub-Alloy lubricant’s effectively minimizing the cold

welding of contacting asperities and the vibration or “stick-slip” effect it can cause. Control of this incipient damage

further results in the reduction of production losses and costly repairs.

Additional Information

Tribol may be contacted for assistance in engineering the automatic dispensing of Molub-Alloy 880 LF Heavy. For

specific term, conditions, warranty, and availability, refer to Castrol Performance Lubricants’ Price List in effect at

time of purchase.