Hitachi NR90GC Service Manual - Page 26

(2) Troubleshooting and correction in the case of general-purpose nailers Problem Possible cause Inspection method 1) Nails cannot be driven. Magazine is not loaded with specified genuine nails. Magazine is loaded with abnormal nails (bent nails, large or small round-head nails, abnormal collation, etc.). Check if the magazine is normally loaded with specified nails. Nail or collating band clogs. Collating band is deformed or torn. Magazine is abnormal (deformed or damaged). Nail Feeder (A) [112] is abnormal (deformed or damaged). Ribbon Spring [121] is abnormal (deformed or damaged). Check if the nail feeder operates smoothly in the magazine. Check if nails (one strip) move smoothly in the magazine. Nail Rail [93] is abnormal (deformed, burrs, damaged or fatigued). Adhesive fragments are on the nail rail or they need oil. Foreign matter is found on the guide face of Nail Feeder (A) [112]. Nail inlet groove of the nose is abnormal (deformed, burrs or damaged). Check if nails (one strip) are fed smoothly into the nail injection port of the nose. Adhesive fragments are in the nail inlet groove. Remedy Use specified nails. Remove the abnormal nails and load the magazine with normal nails. Repair or replace the defective part. Remove the adhesive fragments and apply oil to the nail feeder, Ribbon Spring [121] and the nail rail. Repair or replace the defective part. Remove the adhesive fragments. --- 23 ---