Genie GTH-636 Maintenance Manual
Also see for GTH-1056: Operator's manualService manualService manualService manualService and repair manual
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Contents
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Maintenance Manual September 2016Quarterly Maintenance Procedures36 Genie Telehandlers Part No. 1272858Q-12 Ins pec t and Lubric ate the Sequencing C hai nsQ-12Inspect and Lubricate theSequencing Chains - GTH-636,GTH-1256, GTH-1544,GTH-844 and GTH-1056Genie specifications require that this procedure beperformed quarterly.In extremely dusty or hostile environments, it maybe necessary to lubricate the chains more often.Maintaining the sequencing chains in goodcondition is essential to safe operation and goodmachine performance. Failure to detect damage tothe chains could result in a hazardous operatingcondition.Environments in which Genie Telehandlers operatecan vary widely from outdoor moisture andtemperature extremes, to mildly corrosive or highlycorrosive industrial atmospheres, in addition toabrasive exposures such as sand and grit.In addition, dynamic shock loading can imposeabnormal loads above the endurance limit of thechains. Examples of dynamic shock loading are:• High velocity movement of load, followed bysudden abrupt stops.• Carrying loads in suspension over irregularsurfaces and rough terrain.• Attempting to "inch" loads which are beyondthe rated capacity of the vehicle.The load cycles and environmental conditionsmake it impossible to predict chain life. It istherefore necessary to conduct regular inspections.1 Park the machine on a firm level surface, levelthe boom and engage the parking brake.2 Fully extend the boom.3 Inspect the chains for the following conditions:GTH-636, GTH-844 and GTH-1056 models• Elongation• BL666 chain - Measure 16 pitches of theextend chain for machines usingBL666 chain.1 chain pitchNote: For identification, this chain typicallymeasures 3/4 inch between pin centers when new.Note: Both the extend and retract chains should bemeasured.Note: Measurement should be taken in the areawhere the chain articulates most frequently overthe sheaves.Result: The distance measures 12.36 inches /313mm or less. The chain is withinspecifications. Continue with inspection.Result: If the distance is greater than12.36 inches / 313mm, the machine shall beremoved from service until the chain isreplaced.Note: The boom chain's normal life expectancy canbe expressed as a maximum percent of elongationof 3%. |
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