Part No. 1268494 S-100 • S-105 • S-120 • S-125 3 - 85March 2017 Section 3 • Repair ProceduresMANIFOLDS10-3Valve Adjustments - FunctionManifold, S-100 and S-105 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 boomretract button with the boom fully retracted.Observe the pressure reading on the pressuregauge. Refer to Specifications, Hydraulic OilSpecifications.4 Turn the engine off. Use a wrench to hold therelief valve and remove the cap (item FI).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 ValveNote: Perform this procedure with the boom in thestowed position.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 boomextend button with the boom fully extended.Observe the pressure reading on the pressuregauge. Refer to Specifications, HydraulicSpecifications.5 Turn the engine off. Use a wrench to hold therelief valve and remove the cap (item FA).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.
