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Solvent Spray Gun - TM-5-4210-233-14P-1_278
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Metal Parts - TM-5-4210-233-14P-1_280
TM 5-4210-233-14&P-1 4-9. GENERAL MAINTENANCE PROCEDURES - Continued 4-9.3. General Inspection Instructions a. Sealing Surfaces.  Check all contact surfaces of gaskets, packings, or seals. Ensure there are no nicks, burrs, or scratches. These might damage new seals during assembly. If any defect is found, correct it as outlined in para 4-9.4 following. b. Ball and Roller Bearings.  Check bearings for pitted balls, races, or separator. Bearings shall be rejected if any of the following are seen in the race load area. (1) Cuts or grooves parallel to ball or roller rotation. (2) Fatigue pits (not minor machine marks or scratches). (3) Cracks found during magnetic particle inspection. (4) Serious abrasion of balls or rollers. (5) Serious discoloration of any part of the bearing. c.    Drain Plugs.  When removing drain plugs from transmission, engine, or axles, inspect the plug.  A build- up of grit and/or fine metal particles may indicate part failure. A few fine particles are normal. d. Tubing and Hoses.  Check all hose surfaces for broken or frayed fabric. Check for breaks or weak points due to kinking or rubbing. Inspect metal tube lines for kinks or excessive corrosion. Inspect fitting threads or clamps for damage. Replace any faulty part. After assembly, check all disturbed joints for leaks. e. Splines.  Inspect shaft splines for wear. This will include pitting, peening or fatigue cracks. Perform magnetic particle inspection if needed. f. Electrical  Parts.    Inspect  all  wiring  for  chaffed  or  burned  insulation.  Check  all  terminals  for  tightness. Check all lamps for failure. Check for burns, or broken fittings or components. g. Gears.  The following steps should be used to make a general visual inspection of all gears. Specific tests for particular gears, outlined in the text, should also be carried out. It any gear looks faulty, perform a surface temper and/or magnetic particle inspection. (1) Normal Wear. Loss of metal from surface of teeth. Wear must not prevent gears from meshing or performing properly. (2) Initial  Pitting.  This  may  occur  when  gears  are  first  put  into  service.  It  may  continue  until  high spots have been reduced. It will not affect contact surfaces. This pitting is not necessarily serious. (3) Destructive  Pitting.  This  pitting  occurs  after  initial  pitting,  often  at  an  increasing  rate.  This  type will  destroy  the  contact  area  and  reduce  the  load  capacity  of  the  gear.  Rapid  destruction  will occur with use. 4-150

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