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1-56 SERVICE PITCH BEARING OIL TANK
1-56 SERVICE PITCH BEARING OIL TANK    (Continued) - TM-55-1520-240-23-1_247

TM-55-1520-240-23-1 UH-1H/V and EH-1H Aircraft Manual
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TM 55-1520-240-23-1 1-56 SERVICE PITCH BEARING OIL TANK    (Continued) 1-56 WARNING Prolonged oil leakage can damage finish and create a work hazard by making the fuselage slippery.  It can also affect other systems in the helicopter. Therefore, good judgment must be used when determining allowable leakage. Oil (E254 or E254.1) is a skin irritant. If oil gets on skin, wash thoroughly.  If oil soaks into clothes, change clothes immediately.  Oil gives off fumes that can cause injury to personnel. Use in well-ventilated area. CAUTION Oil (E254 or E254.1) can soften paint. If oil drips on painted surface of helicopter, wipe up immediately with clean cloths. Under normal conditions rotary heads shall be serviced with only one type of oil ( E254 or E254.1).  Oil (E254) must be used for temperatures below -25  F (-32  C). NOTE If oil level in sight gage drops from full (half-way) mark to bottom of glass in two hours of operation, leakage is too great.  Check for source of leakage. Repair as required. Procedure is same to service any pitch bearing oil tank. Blade must be over tunnel. 1. Check average oil level in two sight indicators (1). 2. Remove lockwire. Remove plug (2) and packing (3) from tank (4). 3. Remove plug (5) and packing (6) from housing (7). 1-219







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