Land Pride BH3512 manual Hydraulic valve can be damaged by

Page 12

Table of Contents

Section 1: Assembly and Set-Up

Land Pride

b.Attach the 1/2” street ell to the RETURN PORT on the reservoir. This is the port located on the right side of the reservoir.

c.Attach the reservoir to the backhoe as shown in the drawings that come with the pump kit.

d.Bolt the torque bar to the flange mounting of the pump. Use the bolts, lock washers and nuts supplied.

e.Connect all fittings as illustrated in the instruction with the PTO hydraulic pump kit for your backhoe.

!CAUTION!

Do not connect the pressure supply hose to return port of the backhoe valve. This will destroy a hydraulic pump in seconds.

!CAUTION!

This power beyond circuit should be used only when powering your tractor and backhoe from a tractor internal system where you have relief valve protection of the pump. If it is used on an external pump, disconnection of any quick-coupler with the engine running will result in almost certain pump damage.

!CAUTION!

The hydraulic valve can be damaged by:

1.Reversing the flow of oil through the valve.

2.Hydraulic lines disconnected during transport.

3.Disconnecting the return line while the tractor is running.

4.A faulty quick coupler.

5.More than 12 GPM of oil flow while operating the backhoe.

6.By connecting the backhoe to a tractor valve and actuating the valve in the wrong direction causing a reverse flow through the backhoe valve.

IMPORTANT: If removing backhoe from tractor, quick coupler reconnections should be made with tractor engine off.

Circuit When Backhoe

Pressure Line

is Removed

 

Quick Coupler

Inlet Valve of

(Female)

Backhoe Valve

Return Hose From

 

 

Tractor Valve To Sump

 

(Male)

Pump

 

(Male)

(Female)

Tee

Tank

Press.

 

Oil Reservoir

 

Quick Coupler

(Backhoe,

 

 

Loader or

Suction Hose To Pump

 

Tractor Sump)

Return Hose From

 

Suction Filter

Backhoe Valve

 

(Loader or Backhoe)

Power Beyond Independent Hydraulic Systems

Figure 1-3

Power Beyond

Outlet

Tractor Loader

Valve

Inlet

Valve

Pressure Hose

From The Pump

19388

10 BH3512 Backhoes 340-131M

7/14/08

Image 12
Contents Backhoes Table of Contents Important Safety Information Be Aware Signal WordsFor Your Protection Shutdown and StorageUse Safety Lights and Devices Practice Safe MaintenanceTransport Machinery Safely Transporting the Loader and AttachmentPrepare for Emergencies Wear Protective EquipmentKeep Riders Off Machinery Avoid High Pressure Fluids Hazard838-380C 838-378C818-339C 839-933C 839-932C Using This Manual ApplicationOwner Assistance IntroductionBackhoe Operation, Maintenance & Safety Tips Assembly and Set-Up Tractor RequirementsHydraulic System Requirements Open Center SystemTable of Contents Choose the Appropriate HosingHydraulic valve can be damaged by Testing Procedure for Hydraulic Circuits Testing Open Center SystemChecking a Single Circuit Testing Closed Center System Hydraulic Testing ChartChecking the Cylinders Return HoseUsing Tractor Hydraulics All Tractors Using Tractor Hydraulics John DeereDipper Stick Cylinder Mounting The BackhoeTransport Lock Bolts Top Link Tractor Lower Links Bucket Installation Locking Bar Installation OptionalSeat Assembly Tractor Lower LinkPreparing For Operation Operating The BackhoeTransporting The Backhoe Operating InstructionsControl Functions StabilizersBoom Dipper Stick And BucketDigging Suggestions Digging at the Correct AngleDipper Stick & Boom Bucket Maintenance Bucket Tooth ReplacementMaintenance and Lubrication StorageLubrication LubricationBucket Pivot Bucket Cylinder Base EndBoom Cylinder Rod End Boom PivotBoom Cylinder Base End Stabilizer Arms Boom Swing Cylinder Rod EndBoom Swing Cylinder Base End Specifications & Capacities BH35 Series BackhoesBH3512 Features and Benefits Features BenefitsTroubleshooting Problem Cause Solution Load drops when valveHydraulic System PerformanceTorque Values Chart AppendixIn-tpi · m Ft-lb Mm x pitch30 BH3512 Backhoes 340-131M Warranty Corporate Office PO. Box 5060 Salina, Kansas 67402-5060 USA