Woods Equipment 1050 Adjusting System Relief Valve Pressure, Replacing Shock/Dampening Valves

system. The backhoe pump will separate or crack if system pressure exceeds the maximum.

Relief valve adjustment requires a test bench and accurate gauges.

Adjusting System Relief Valve Pressure

A WARNING

„Adjustment of system relief pressure must be done by a qualified, experienced dealership. Incor- rect adjustment can result in system failures and serious personal injury.

Place a pressure gauge in the pump pressure line at relief valve. When installing pressure gauge, be sure to use steel fittings that will withstand pressure up to 5000 psi.

Remove cap nut (2a), see Figure 17. Adjusting screw (2c) has a hex socket - rotate screw clockwise to increase pressure and counter-clockwise to decrease pressure.

Start tractor PTO and set system relief valve pressure at 2100 psi. When pressure is adjusted, shut tractor PTO and tractor off. Replace cap nut (2a) on system valve.

Replacing Shock/Dampening Valves

It is not necessary to remove console valve from con- sole to replace shock/dampening valve cartridges. Remove console cover and replace them. Be sure you install valve cartridges set at the correct pressure. Valves are all pre-set at 2400 psi.

Shock / Dampening	Pressure Setting
Valve
4AA	2100 psi
4BB	2500 psi

Segment Replacement

Relieve system pressure and remove valve from back- hoe. Remove tie rods and separate the valve sections. See Figure 17.

Replace defective sections as necessary. Make sure you install two spacers between each section of each tie rod. Note the location of O-rings (7 & 8). They must be placed in the location between valve sections as shown in Figure 17.

When assembling valve sections, use care when torqu- ing nuts on tie rods. This must be done in steps - that is to say, gradually increasing the tightening torque up to

13lbs-ft. in an alternating sequence. Non-uniform or excessive tightening can cause binding of spools. Fail- ure to attain the proper torque can result in leaks. Always use a torque wrench.

51861 (Rev. 6/16/2006) Dealer Service 23