Service Manual February 2017Oscillating Axle Components144 S-80 • S-85 • S-80X Part No. 1259369GT13-2Oscillate Directional ValveHow to Adj ust the Oscill ate R elief ValveHow to Adjust the Oscillate ReliefValve1 Connect a 0 to 2000 psi / 0 to 150 barpressure gauge to the diagnostic nipplelocated on the function manifold.2 Remove the drive chassis cover from thenon-steer end of the machine.3 Disconnect the directional valve linkage, byremoving the clevis yoke from the drivechassis.1 oscillate valve2 clevis yoke3 drive chassis4 Start the engine from the ground control.5 With the engine running, manually activate thevalve and observe the pressure reading on thepressure gauge. Refer to Specifications,Hydraulic Component Specifications.6 Turn the engine off.7 Locate the relief valve on the function manifold(item SC).8 Loosen the jam nut on the relief valve.9 Turn the valve clockwise to increase thepressure or counterclockwise to decrease thepressure.Tip-over hazard. Do not adjustthe relief valve higher thanspecified.10 Tighten the jam nut.11 Repeat steps 4 through 10 to confirm theoscillate relief valve pressure.Note: The oscillate pressure required is while theoscillate cylinders are in motion. Do not dead headthe cylinders to either side.12 Turn the engine off, remove the pressuregauge and assemble the directional valvelinkage.13 Install the cover on the non-steer end of thedrive chassis.
