4 - 98 S-100 • S-105 • S-120 • S-125 Part No. 102916June 2011Section 4 • Repair ProceduresREV AMANIFOLDS10-8Valve Adjustments - FunctionManifold, S-120 and S-125 ModelsHow to Adjust the FunctionManifold Relief ValveNote: Perform this procedure with the boom in thestowed position.1 Connect a 0 to 5000 psi / 0 to 345 bar pressuregauge to the test port on the function manifold.2 Start the engine from the ground controls.3 Simultaneously push and hold the functionenable/high speed button and the boom retractbutton with the boom fully retracted. Observethe pressure reading on the pressure gauge.Refer to Section 2,Hydraulic Specifications.4 Turn the engine off. Use a wrench to hold therelief valve and remove the cap (item BI).5 Adjust the internal hex socket. Turn it clockwiseto increase the pressure or counterclockwise todecrease the pressure. Install the relief valvecap.Tip-over hazard. Do not adjustthe relief valve higher thanspecified.6 Repeat steps 2 through 5 to confirm the reliefvalve pressure.How to Adjust the Boom ExtendRelief ValvePerform this procedure with the boom in the stowedposition.1 Connect a 0 to 3000 psi / 0 to 207 bar pressuregauge to the test port on the function manifold.2 Start the engine from the ground controls.3 Fully raise and extend the boom.4 Simultaneously push and hold the functionenable/high speed button and the boom extendbutton with the boom fully extended. Observethe pressure reading on the pressure gauge.Refer to Section 2,Hydraulic Specifications.5 Turn the engine off. Use a wrench to hold therelief valve and remove the cap (item BA).6 Adjust the internal hex socket. Turn it clockwiseto increase the pressure or counterclockwise todecrease the pressure. Install the relief valvecap.Tip-over hazard. Do not adjustthe relief valve higher thanspecified.7 Repeat steps 2 through 6 to confirm the reliefvalve pressure.
