Hitachi NR90GC Service Manual - Page 28

Problem Possible cause 3) Head of a nail driven into a workpiece protrudes from the wood surface. Adjuster is improperly adjusted. Workpiece is very hard. Driver blade is worn. Inspection method Turn the adjuster to the lowest position and drive a nail. Drive a nail into soft wood workpiece and check if the head protrudes from the wood surface. Operate the nailer without nails and check if the driver blade is projected from the nose tip. Remedy Adjust the adjuster to the proper position. Do not use unspecified workpieces. Replace the driver blade. 4) Nails clog the Unspecified nails used. mechanism. See in item 1). Driver blade worn. Nail Feeder (A) [112] is abnormal (worn or damaged). Check if the nails are specified ones. Use specified nails. Check if they move smoothly after putting nails, and check if the nail feeder operates smoothly. See in iem 1). Check if the driver blade tip is Replace the part. worn. Check Nail Feeder (A) [112] for abnormal condition. Replace Nail Feeder (A) [112]. --- 25 ---