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Boom & AttachmentsXR620/621/842/1045/1245/1254/1267/1534/2050/303410-6 CHECK AND ADJUST BOOM CHAIN TENSIONEVERY 250 HOURS OFOPERATIONPerform the following procedure to check and adjust the boom chain tension:– TASK REQUIREMENTS –PersonnelSpecial tools and equipmentParts and consumable materialsTwo mechanicsSafety glassesNoneBe very careful when working near moving boom parts and the chain. Seriousinjuries may result when fingers or loose clothing get caught in moving chain.NOTE: This procedure adjusts the tension of the extend and retract chains.INITIAL SET-UP1. Park forklift on level surface.2. Set Travel Select lever to NEUTRAL (N).3. Set Parking Brake switch to ON.4. Lower both outriggers until left and right OUTRIGGER lights come on (XR1245/1254/1267/2050).CHECK AND ADJUST CHAIN TENSION1. Raise boom to horizontal (level) position.2. Fully extend boom.3. Position second mechanic where he/she can closely observe operation of extend chain.4. Retract boom about 2 inches then abruptly stop movement of boom. Second mechanic shouldobserve amount of slack there is in chain by noting how much chain bounced when boom wasstopped. If chain bounced more than 1/2 " proceed to step 5.5. See Figure 10-7. Turn chain tension adjustment nut approximately one turn clockwise.6. Repeat steps 3 through 5 until extend chain has approximately 1/2" of slack. Some slack in chain isdesirable. DO NOT OVER TIGHTEN CHAIN.Service Manual Rev 01 – 05/10 10-15P/N 24933-000