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12. Valve Body (BV, HJ, TV) and Valve Needle or Tube (HJ, TV)
Annual. Exterior of valve should be checked for leakage, cracks, and corrosion. If accessible, interior of valve
should be checked for corrosion, cavitation erosion, scale buildup that may interfere with valve movement or
sealing, and any other damage. Check lubrication to bearings and oil level of gear boxes.
should be checked for corrosion, cavitation erosion, scale buildup that may interfere with valve movement or
sealing, and any other damage. Check lubrication to bearings and oil level of gear boxes.
Not Scheduled. Unwater water conduit or penstock or disassemble valve to allow inspection of all valve
components. Check for parts damaged by cavitation erosion or corrosion. Check water and oil seals and
replace as necessary. Polished surfaces of hydraulically operated hollow jet valves should be checked for any
damage and built up by welding or other process, remachined, and repolished if necessary. Check bearings
and bronze seal rings for wear or other damage and replace if necessary.
components. Check for parts damaged by cavitation erosion or corrosion. Check water and oil seals and
replace as necessary. Polished surfaces of hydraulically operated hollow jet valves should be checked for any
damage and built up by welding or other process, remachined, and repolished if necessary. Check bearings
and bronze seal rings for wear or other damage and replace if necessary.
Gate and Valve Operators and Hoists.
13.Threaded Stem Hoist and Mechanical Operators (FW, CG, RS, RF, JF, SG, CY, HJ, TV)
Annual. Inspect gear cases for leaks or other damage. Check motor coupling for misalignment. Check oil in
gear boxes for water contamination and for proper level. Check grease coated gears, stems, and stem nuts for
dirt or dust contamination of grease. Check gears, stem, and stem nut for wear, galling, or other damage.
Grease bearings or other components equipped with grease fittings being careful not to over grease and damage
grease seals. During operational test, check for unusual or excessive vibration or noise.
gear boxes for water contamination and for proper level. Check grease coated gears, stems, and stem nuts for
dirt or dust contamination of grease. Check gears, stem, and stem nut for wear, galling, or other damage.
Grease bearings or other components equipped with grease fittings being careful not to over grease and damage
grease seals. During operational test, check for unusual or excessive vibration or noise.
Not Scheduled. Drain gear boxes and refill with new oil. Grease coated gears and stems should be
cleaned and recoated with new grease. Disassemble as required to check condition of gears, bearings,
or other components normally inaccessible.
cleaned and recoated with new grease. Disassemble as required to check condition of gears, bearings,
or other components normally inaccessible.
14. Chain Hoists (FW, CG, RG)
Annual. Inspect chain for corrosion and deformed chain links or pins. Check sprocket for damaged teeth.
Apply appropriate lubricant to chain. Check oil in gear boxes for water contamination and for proper level.
Check condition of grease for dirt or dust contamination on grease coated gears. Grease sheave, drum, and
gear shaft bearings equipped with grease fittings being careful not to overgrease and damage grease seals.
Check gears for uneven wear, galling, or signs of misalignment. Check brake shoes and brake drums for signs
of overheating or other damage.
Apply appropriate lubricant to chain. Check oil in gear boxes for water contamination and for proper level.
Check condition of grease for dirt or dust contamination on grease coated gears. Grease sheave, drum, and
gear shaft bearings equipped with grease fittings being careful not to overgrease and damage grease seals.
Check gears for uneven wear, galling, or signs of misalignment. Check brake shoes and brake drums for signs
of overheating or other damage.
Not Scheduled. Drain gear boxes and refill with new oil. Grease coated gears should be cleaned and recoated
with new grease. Disassemble as required to check condition of gears, bearings, or other components normally
inaccessible.
with new grease. Disassemble as required to check condition of gears, bearings, or other components normally
inaccessible.
15. Wire Rope Hoists (FW, CG, BH, RG)
Annual. Inspect wire rope for broken wires, worn or abraded wires, corrosion, and crushed or flattened
strands. See Section 6, Cranes, Hoists, and Rigging Equipment for replacement requirements. Inspect rope
drum and sheaves for wear and spooling characteristics of the drum. If possible, apply lubricant to entire
length of wire rope. Check oil in gear boxes for water contamination and for proper level. Grease sheave,
strands. See Section 6, Cranes, Hoists, and Rigging Equipment for replacement requirements. Inspect rope
drum and sheaves for wear and spooling characteristics of the drum. If possible, apply lubricant to entire
length of wire rope. Check oil in gear boxes for water contamination and for proper level. Grease sheave,