Remove the four motor cover mounting bolts (Item 1) [Figure 20-30-6].
Clean the area around the control valve. Loosen and remove the main relief valve (Item 1) [Figure 20-30-7].
Remove the O-rings and back-up washers [Figure 20-30-5].
Clean the main relief valve in clean solvent. Use air pressure to dry the valve.
Install new O-rings and back-up washers. Install the main relief valve (Item 1) [Figure 20-30-7] and tighten. Check
the pressure again. (See MAIN RELIEF VALVE (CONTโD) on Page 20-30-3.)
Installation: Tighten the main relief valve to 35-40 ft.-lbs. (47-54 Nm) torque.
