Mobilgrease 28 is manufactured from a synthesized hydrocarbon fluid and a nonsoap thickener. Its consistency is between an NLGI No. 1 and No. 2 grease. It offers outstanding performance over wide temperature ranges, with the excellent retention and resistance to high-temperature degradation. In addition, it resists water washing, provides superior load-carrying ability, reduces frictional drag, and prevents excessive wear.
Mobilgrease 28 exceeds the requirements of U.S. Military Specification MIL-G-81322E Grease (Grade A), General-Purpose, Aircraft, and meets the requirements of U.S. Military Specification DOD-G-24508A (Navy) for shipboard auxiliary machinery. It can be designated U.S. Military Symbol WTR and NATO Symbol G-395.
Other tests show that Mobilgrease 28 prevents friction oxidation (fretting) and lubricates rolling element bearings under conditions of high speeds and temperatures. It has also shown superior ability to lubricate heavily loaded sliding mechanisms, such as wing flap screwjacks.
Application Mobilgrease 28 is designed for the lubrication of plain and rolling bearings at low to high speeds, and splines, screws, worm gears, and other mechanisms where high friction reduction, low wear, and low lubricant friction losses are required. It provides minimum resistance to starting at extreme low temperatures (down to -54° C/-65° F), as well as low running torque.
Mobilgrease 28 is recommended for use in landing wheel assemblies, control systems and actuators, screwjacks, servo devices, sealed-bearing motors, oscillating bearings, and helicopter rotor bearings on military and civil aircraft and on naval shipboard auxiliary machinery. It also can be used where superseded specifications MIL-G-81322 (WP), MIL-G-7711A, MIL-G-3545B, and MIL-G-25760A may be called for. Mobilgrease 28 also is recommended for industrial lubrication, including sealed or repackable ball and roller bearings wherever extreme temperature conditions, high speeds, or water washing resistance are factors. Typical applications include conveyor bearings, small alternator bearings operating at temperatures near 177° C (350° F), high-speed miniature ball bearings, and bearing situations where oscillatory motion, vibration, and fretting create problems.
1 case of 10 13.4-oz cartridge