Replace all cracked gears.
(2) Replace gears having worn, pitted, or galled teeth. Use a crocus cloth dipped in drycleaning solvent to
remove sharp fins and burrs from gear teeth.
Bushings and Bushing-Type Bearings. When bushings and bushing-type bearings are damaged or worn
beyond specified limits, the parts with which they are used must usually be replaced as well.
g. Oil Seals. Oil seals must be replaced when the thin feather edge is damaged or when the seal material has
become hard or brittle.
(1) Removal. Press or pry a damaged oil seal from the casting or adapter, being careful not to damage the
bore in the casting or adapter.
(2) Repair. When a casting oil seal bore or adapter is burred so that an oil-tight seal is impossible, replace
the casting or adapter. Remove slight nicks, burrs, and scratches from the casting bore or adapter with crocus cloth
dipped in drycleaning solvent.
Installation. Install a new oil seal in the bore of the casting or adapter using a proper oil seal installation
a. General. Extreme care in component assembly operations will ensure satisfactory performance from the
mixer body. Rules for assembly are outlined below. Step-by-step procedures for assembly of various components are
covered in the paragraph relating to the specific component.
(1) Cleanliness is essential in all component assembly operations. Dirt and rust, even in minute quantities,
are abrasive. Parts must be cleaned as specified and kept clean. Wrap or cover parts and components when assembly
procedures are not immediately completed.
(2) Coat all bearings and all contact surfaces with engine oil OE/HDO-10 (MIL-L-2104C) to ensure
lubrication of parts during initial startup.
Replace all gaskets and preformed packings during assembly.
c. Teflon-Wrapped Pipe Plugs. Certain pipe plugs have a thin coat of Teflon applied to the pipe threads before
installation of the plug. This is done to provide better seal and also to permit easier removal of the pipe plug. Those pipe
plugs requiring a Teflon coating are identified in the particular assembly procedure calling for the installation of such plugs.
The method of coating these particular plugs with Teflon is as follows:
(1) Be sure the pipe plug is thoroughly clean and dry before applying the liquid Teflon. All dirt, grease, oil,
and scale must be removed.