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Troubleshooting Guide

GE, GX Series

Backhoe

9. Troubleshooting Guide

If a problem is encountered that is difficult to solve, even after

having read through this troubleshooting section, contact your

local dealer, distributor or Wallenstein Equipment. Know your

machine serial number. See

Serial Number Location on page

Problem

Cause

Solution

Cylinder rods do not move or move

slowly.

No pressurized hydraulic oil.

Oil filter plugged. Change filter.

Low hydraulic oil level. Add oil to reservoir.

Pressure and return hoses to backhoe are

reversed.

Change hose connections.

Not enough oil flow.

Flow control set too low. Adjust for more flow.

Stuck / damaged / mismatched couplers.

Clean or replace couplers. Make sure mating

couplers are same style.

Check valve stuck.

Clean or replace.

Engine speed too slow.

Increase engine speed to correct rpm.

Cylinder movements jerky.

Hydraulic system leak. Air in hydraulic system.

Tighten all hydraulic connections. Cycle cylinders

to remove air.

Control handle does not go to neutral

when released.

Return springs collapsed.

Check and replace if required.

Control valve may be damaged.

Call technician. Valve may need to be serviced or

replaced.

Hydraulic hose leaking.

Hose worn or damaged.

Replace hose. Check hose routing to avoid

chafing or rubbing.

Loose hose connection. Adapters or hose ends

damaged.

Tighten or replace if damaged.

Cylinder leaking oil.

Seals worn.

Call technician. Seal replacement may be required.

Hydraulic system behaving erratically.

Mismatched control valve. Valve type must

be same as tractor hydraulic circuit (open or

closed center).

Determine if hydraulic system on tractor is open

or closed center. Make sure is same.

Boom drifts down.

Seals leaking (bypassing).

Replace seals.

Counterbalance valve defective.

Repair or replace.

Boom does not swing or swings slowly.

Boom swing lock pin in place.

Remove boom lock pins before starting work.

No oil pressure.

Oil filter plugged. Change filter.

Low hydraulic oil level. Add oil to reservoir.

Oil flow too low.

Flow control set too low. Adjust control to

increase flow.

Engine speed too low.

Increase speed to correct rpm.

Содержание GE Series

Страница 1: ...OPERATOR S MANUAL Backhoe GE GX Series Document Number Z97103_En Rev Jan 2020...

Страница 2: ...rate the backhoe safely This manual covers the following models GE605 GX620 GX720 GX920 GX920XT Safe efficient and trouble free operation of this Wallenstein product requires that anyone using or serv...

Страница 3: ...uirements 20 5 3 Installing the Backhoe 22 6 Controls 23 6 1 Backhoe Controls 23 6 2 Main Boom Lock and Swing Lock Pins 26 6 3 Stabilizer Lock Plates 26 6 4 Extendable Dipper Control GX920XT 26 6 5 Hy...

Страница 4: ...equipment care adjustments safe operation and applicable warranty policy and reviewed the manuals Dealer Address City State Province ZIP Postal Code Phone Number 1 2 1 Dealer Inspection Report Hydrau...

Страница 5: ...uct when ordering parts or requesting service or other information The Serial Number Plate location is shown in the illustration For future reference record your product Model and Serial Number in the...

Страница 6: ...ymbols on a black background This type of decal explains the operation of a control Product Decals indicate machine model and serial number and other important information VIN NLV MODEL Manufactured b...

Страница 7: ...ER Indicates an imminently hazardous situation that if not avoided will result in death or serious injury This signal word is to be limited to the most extreme situations typically for machine compone...

Страница 8: ...estion STOP Have a first aid kit and fire extinguisher available for use should the need arise and know how to use them Do not modify the equipment in any way Unauthorized modifications may affect the...

Страница 9: ...ld result in a roll over Face the equipment when getting on and off Maintain 3 point contact with steps and handrails Never operate this machine under the influence of alcohol or drugs Consult your do...

Страница 10: ...Make sure the procedure is understood before performing any service work 2 6 1 Hydraulic System Safety Make sure that all the components in the hydraulic system are kept clean and in good condition M...

Страница 11: ...has made eye contact with and signaled the backhoe operator The backhoe is in transport position or backhoe bucket is resting on the ground The engine is shut off 2 8 Work Zone Establish a Work Zone p...

Страница 12: ...workers when lowering stabilizers Make sure they are in the safe zone where they cannot be injured Always be aware of hazards such as Underground utilities Tree roots Structures close to the excavati...

Страница 13: ...n off sheet provided below can be used Make periodic reviews of Safety and Operation a standard practice for all operators Review again at the startup of every season The design and manufacture of thi...

Страница 14: ...quire your safety awareness Become familiar with each warning and the machine function related to that area Think SAFETY Work SAFELY IMPORTANT If safety signs have been damaged removed become illegibl...

Страница 15: ...l Read ALL operating instructions in the manual and learn the meaning of ALL safety signs on the machine The best safety feature is an informed operator 2 Boom and Stabilizers Warning Risk of collisio...

Страница 16: ...hazard in this area from unsecured boom Install main boom and swing lock pins to prevent unintentional movement before servicing or transporting the backhoe 5 Toplink Warning Risk of crushing injury...

Страница 17: ...king service survey the area before digging 3 3 Replacing Damaged Safety Signs Keep safety signs clean and legible at all times Replace safety signs that are missing or have become illegible Parts tha...

Страница 18: ...following the instructions in conjunction with a good maintenance program your backhoe can provide many years of trouble free service IMPORTANT Make sure all operators understand how to put the backho...

Страница 19: ...Hydraulic Hose Connections 8 Operator Seat optional on GE605 9 Stabilizer Foot 10 Control Panel 11 Dipper Boom Cylinder 12 Bucket Cylinder 13 Extendable Dipper Boom GX920XT only 14 Main Boom Cylinder...

Страница 20: ...5 27 gpm 19 102 Lpm IMPORTANT When mounting a GE605 or GX620 backhoe to a skid steer that has a flow rate greater than 8 gpm 32 Lpm BFC501 Flow Divider Kit is required to prevent damage to the seals...

Страница 21: ...erent Tieback kit is required Three point Hitch Mount In some cases a Wallenstein backhoe can be mounted on a 3 point hitch with one of the following kits PT300 Three point hitch CAT I Suitable for li...

Страница 22: ...with the hooks on the bottom of the sub frame on the tractor 6 Use the backhoe hydraulics to raise the bracket assembly into the bottom of the hooks for positive attachment 7 Use the backhoe hydraulic...

Страница 23: ...ontrols before starting WARNING Do not operate the machine until you are thoroughly familiar with the position and function of the various controls Read the operator s manual thoroughly Your safety is...

Страница 24: ...Speed Turning the control valve knob on the lower console varies boom swing speed by changing the amount of oil flow to the circuit Turn the knob right to slow boom swing speed Turn it left to increa...

Страница 25: ...ck on the lever to raise it 00995 Dipper Stick Boom Away Close Push the far right control lever forward to extend the dipper boom Pull back on the control lever to pull in the dipper boom 00995 Bucket...

Страница 26: ...ck plates secure the stabilizers in place when traveling with the backhoe Raise the stabilizer up and swing the lock plate into position to lock it 00998 Fig 12 Stabilizer Lock Plates 6 4 Extendable D...

Страница 27: ...installed on a GX920XT with extendable dipper arm There is no provision for mounting it with the telescopic dipper and no provision for operating it in the hydraulic circuit The hydraulic thumb makes...

Страница 28: ...umb 01024 Fig 18 Open the Thumb In the center position the thumb is stationary When not in use replace the foot control cover When fully retracted the thumb can curl up tight against the dipper boom f...

Страница 29: ...someone getting in the way or getting pinched caught by components Do not resume work until the work zone is clear Keep the tractor wheels in contact with the ground to provide the widest stabilizer...

Страница 30: ...WARNING Stability Hazard for Tractors Use the front end loader and backhoe stabilizers to relieve some weight o the tractor tires Using the backhoe with tires raised o the ground could result in damag...

Страница 31: ...l the machine If this is not the case planks or blocking can be placed under the stabilizers to level the machine All four wheels must be touching the ground 00934 Fig 22 Swing boom up slope when poss...

Страница 32: ...ft objects that are beyond the lifting limits of the backhoe The values in the table below are with the boom fully extended at 3 ft 1 m off the ground Model Lifting Capacity GE605 250 lb 113 kg GX620...

Страница 33: ...ne around the stabilizers W069 7 7 Stopping and Parking the Machine Park the machine on dry level ground 1 Lower the boom to the ground 2 Set the parking brake 3 Allow the engine to idle for 5 minutes...

Страница 34: ...only at a low speed and a gradual steering angle Make certain that at least 20 of the tractor s weight is on the front wheels to maintain safe steering capability Slow down on rough or uneven ground...

Страница 35: ...vities have been filled with grease to remove any water residue from washing 5 Touch up all paint nicks and scratches to prevent rusting 6 Store the machine in an area away from human activity Select...

Страница 36: ...dure is understood before performing any service work 8 1 1 Hydraulic System Safety Make sure that all the components in the hydraulic system are kept clean and in good condition Make sure all compone...

Страница 37: ...l every 100 hours If adding oil use Dexron III Automatic Transmission Fluid ATF Dexron VI or Mercon ATF are also acceptable substitutions Check that all circuit connections are tight 8 4 Grease Points...

Страница 38: ...Service Maintenance GE GX Series Backhoe 38 2 2 4 4 3 3 4 4 Fig 32 Grease Points typical on all models...

Страница 39: ...et Removing If changing to a different accessory or size of bucket support the boom so that the bucket is resting on the ground Make sure the boom cannot move unexpectedly when the pins are driven out...

Страница 40: ...linders to remove air Control handle does not go to neutral when released Return springs collapsed Check and replace if required Control valve may be damaged Call technician Valve may need to be servi...

Страница 41: ...Yes Yes Bucket Rotation 180 180 180 180 180 Swing Arc 150 180 180 180 180 SAE Dipper Boom Digging Force 1 250 lb 5 560 N 1 250 lb 5 560 N 2 300 lb 10 230 N 3 200 lb 14 234 N 2 200 lb 9 786 N SAE Buck...

Страница 42: ...X Operator s Seat X N A N A N A N A Street Pad Kit X X X X X Clamp on Mechanical Thumb X X X X X Hydraulic Thumb1 N A N A X X N A Ripper Tooth N A X X X X Quick Attach Bucket Adapter N A N A X X X Ve...

Страница 43: ...ease torque values by 5 NOTE Bolt grades are identified by their head markings Imperial Bolt Torque Specifications Bolt Diameter Torque Value SAE Gr 2 SAE Gr 5 SAE Gr 8 lbf ft N m lbf ft N m lbf ft N...

Страница 44: ...and tighten the swivel nut with the second Torque to values shown If a torque wrench is not available use the FFFT Flats From Finger Tight method Hydraulic Fitting Torque Tube Size OD Hex Size Across...

Страница 45: ...receipt with any claim This warranty does not cover the following 1 Normal maintenance or adjustments 2 Normal replacement of wearable and service parts 3 Consequential damage indirect damage or loss...

Страница 46: ...oper Usage 28 Maintenance 28 Operation 27 I Installation 20 Equipment Matching 20 Skid Steer Universal Quick Attach Plate 21 Installing the Backhoe 22 J Jobsite Safety 29 L Lifting or moving a load 32...

Страница 47: ...edule 37 Sign off form 13 Skid Steer Universal Quick Attach Plate 21 Specifications 41 Accessories 42 Common Bolt Torque Values 43 Hydraulic Fitting Torque 44 Machine Specifications 41 Stabilizer Left...

Страница 48: ...www wallensteinequipment com...

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