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Boom & AttachmentsXR620/621/842/1045/1245/1254/1267/1534/2050/3034Be very careful when working near moving boom parts and the chain. Seriousinjuries may result when fingers or loose clothing get caught in moving chain.INITIAL SET-UP1. Park forklift on level surface.2. Set Travel Select lever to NEUTRAL (N).3. Set Parking Brake switch to ON.4. Raise boom to horizontal (level) position.5. Fully extend boom until extend chain is taut.6. Set Ignition switch to OFF.7. Attach danger tags to steering wheel and ignition key. Refer to para. 2-5, for lockout-tagoutprocedure.INSPECT EXTEND CHAIN1. See Figure 10-4. Inspect extend chain for following defects:a. Corrosion and contamination.b. Lack of lubrication.c. Cracks caused by fatigue.d. Cracks caused by stress corrosion.e. Broken links caused by extreme overload.f. Enlarged holes caused by extreme overload.g. Tight joints.h. Distorted or battered link plates.i. Rotated pin heads.j. Abnormal pin protrusion.k. "V" flats in incorrect alignment.l. Chain clevis ends for cracking or distortion.m. Chain sheaves for bearing wear and grooving from chain.Service Manual Rev 01 – 05/10 10-9P/N 24933-000