Service and Repair Manual April 2018Boom Components14 GTH-636 Part No. 1287209GT3 Tilt the forks back to pivot the quick attach intothe attachment.4 Insert the quick attach lock pin all the waythrough the attachment and be sure the quickattach lock lever is secured in the notch on thepin.How to R eplac e the R etraction C hainHow to Replace the RetractionChainNote: Perform this procedure on a firm, levelsurface with the boom in the stowed position andthe wheels chocked.1 Start the engine and allow the engine to idle.2 Raise the boom to a horizontal position.3 Fully retract the boom.4 Extend the boom approximately 1 inch / 2.5cm to insure retract chain is slack. It may benecessary to loosen the extend chain adjuster.5 Turn the machine off and remove the key fromthe key switch.6 Working under the boom, remove thefasteners securing the single-chain tensionerto the bottom of boom tube number 1.Note: When installing the new chain, the chaintensioner should be mounted in the two mostrearward holes.7 Remove the inspection cover from the pivotend of the boom. Remove the extensioncylinder. Refer to How to Remove theExtension Cylinder in the Repair section.8 Remove the retaining clip from the retainingpin and then drive the pin securing the chainanchor to the boom.9 Working at the pivot end of the boom, pull thechain out of the boom.
