Greater length of chassis-life, improved riding and handling qualities and the elimination of annoying squeaks and rattles are the major benefits sought in chassis lubrication, and these are claimed to be achieved by an effective system which derives its lubricant from a central source. The paper supplements a previous one, and is in the nature of a progress report. Experimental work since that of 1924 is described, and the improvements in the system resulting therefrom are cited. Layouts and constructions used in connection with this central-source chassis-lubrication system are illustrated, and a short description of the salient points is presented.
Oil pressures maintained in the different parts of the system are discussed, possible leakages of the oil are specified, desirable viscosities of the oil are mentioned, and the construction of the tubing and the various special connections is explained. The lubrication of special parts of the chassis is also covered. Field results show that the best lubrication is attained by use of the heavier grades of engine cylinder-oils which have great viscosity.


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