Terex Genie GR-26J Service Manual

Also see for Genie GR-20J: Service manual Operator's manual

Section 4 • Repair Procedures4 - 28 GR™-20J • GR™-26J Part No. 227656GTMarch 20225 Tag, disconnect and plug the hydraulic hoses atthe function manifold. Cap the fittings on themanifold.Bodily injury hazard. Sprayinghydraulic oil can penetrate andburn skin. Loosen hydraulicconnections very slowly to allowthe oil pressure to dissipategradually. Do not allow oil to squirtor spray.6 Remove the fasteners securing the functionmanifold to the hydraulic tank. Set the fastenersto the side.7 Loosen the clamp securing the hydraulic powerunit to the hydraulic tank. Do not remove theclamp.8 Remove the clamp securing the hydraulicpower unit to the chassis. Set the clamp to theside.9 Carefully remove the hydraulic power unit fromthe tank and place it on a clean work bench.Note: If necessary, loosen the bottom connector ofauxiliary pump to more easily remove the hydraulicpower unit.Illustration 2a function pumpb hydraulic tank10 Remove the fasteners securing the functionpump to the function manifold. Set the fastenersto the side.11 Carefully remove the function pump from thehydraulic power unit.Tip-over hazard. After replacingthe hydraulic pump, it is critical toreturn the relief valve settings tooriginal factory specifications.Failure to restore the machine tooriginal factory specificationscould cause the machine to tipover, resulting in death or seriousinjury.HYDRAULIC PUMPa b