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

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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

 

 

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Contents Backhoe To the Dealer IntroductionLEA EL Instructivo Table of ContentsBuckets Rated Capacity BH1050 SpecificationsIntroduction Backhoe Components General InformationTraining SafetySafety Rules InstallationOperation Storage MaintenanceTransportation Be Careful Safety & Instructional DecalsSafety General Operation OperationOperation Control Handle Operation Position the MachineFill Bucket Start ExcavationTransporting Dump and Return CycleTrenching and Excavating Point Hitch Saf-T-Lok Transport and Swing Lock InstallationCleaning Removing and Storing BackhoePRE-OPERATION Check List Periodically or Before Extended StorageRelief Valve Owner ServiceBucket Tooth Replacement Optional Auxiliary Pump and Hydraulic SystemLubrication Hydraulic Hoses and FittingsProblem Possible Cause Solution TroubleshootingBoom, Dipperstick, Bucket & Stabilizer Cylinders Figure Dealer ServiceHydraulic Cylinder Repair General Hydraulic Repair InformationHydraulic Valve Repair Installing ValvePressure Settings on Shock/Dampening Valves Hydraulic Pump RepairReplacing Shock/Dampening Valves Adjusting System Relief Valve PressureShock / Dampening Pressure Setting Segment ReplacementHydraulic Valve Repair Swing Cylinder Operational Theory Swing Cylinder Cushion OIL Flow & FigureSwing Cylinder Oil Flow Energy Dealer SET-UP Instruction AssemblyAssembly Assembly ProcedureDipperstick & Bucket Assembly Plumbing InstallationAttaching Backhoe to Tractor Saf-T-Lok is a registered trademark of Woods Equipment Saf-T-LokInstallation Top Link and Saf-T-Lok Hitch Installation Seat Installation Safety Chain InstallationDelivery Check List Dealer Check ListsDealer Check Lists PRE-DELIVERY Check ListParts Parts IndexBH1050 Main Frame Assembly Hardware BH1050 Dipperstick & Bucket Assembly 34011 BH1050 Boom Assembly Valve Controls & Hardware BH1050 Console Valve Assembly Check, 2400 psi relief assemblies BH1050 Hoses & Fittings Assembly BH1050 Pump Assembly BH1050 540 RPM Hydraulic Pump BH1050 1000 RPM Hydraulic Pump BH1050 Swing Cylinder QTY Description Part BH1050 Stabilizer CylinderBH1050 Bucket Cylinder BH1050 Boom & Dipperstick Cylinder BH1050 SAF-T-LOKASSEMBLY BH1050 Stabilizer PAD KIT Optional Metric Series Bolt Torque ChartSAE Series Torque Chart AppendixAbbreviations Bolt Size ChartIndex IndexWarranty Rev /23/2005 51861