Hydraulic Troubleshooting

SymptomProblemSolution

Slow or jerky operation

Cold hydraulic oil.

Run engine and cycle loader.

Use low viscosity hydraulic oil in cold weather. (See your tractor Operator's Manual or your John Deere dealer.)
 

Low hydraulic oil level.

See tractor Operator's Manual.
 

Selective control valve output set low.

Increase to fastest rate. (See your tractor Operator's Manual.)
 

Engine speed too slow.

Increase engine speed.
 

Internal cylinder leakage.

Test cylinders for internal leaks. Install cylinder repair kit. (See your John Deere dealer.)
 

Faulty tractor hydraulic system.

See your tractor Operator's Manual or your John Deere dealer.
 

Faulty load sensing signal.

See your John Deere dealer.
 

”Flow checking” or faulty quick-connect coupler.

Replace coupler. (See your John Deere dealer.)
 

Overloading bucket or attachment.

Reduce load. (See how lift capacity is determined in Specifications section.)
 

Shut off valve near multicoupler is partially closed.

Turn handle of shut off valve counterclockwise to fully open.

Oil leaks

Loose connections.

Tighten fittings.
 

Defective seal in fittings located on top of torque tube.

Inspect fittings for leaks. Replace O-rings and seals if necessary. (See your John Deere dealer.)
 

External cylinder leakage.

Install cylinder repair kit. (See your John Deere dealer.)

Lack of lift capacity

Load is greater than loader lift capacity.

See how lift capacity is determined in Specifications section.
 

Internal lift cylinder leakage.

Test cylinders for internal leaks. Install cylinder repair kit. (See your John Deere dealer.)

Heavily loaded loader lowers when control is moved to raise position.

Control valve not working properly.

Repair control valve. (See your John Deere dealer.)

Heavily loaded bucket or attachment dumps when control is moved to roll back position.

Control valve not working properly.

Repair control valve. (See your John Deere dealer.)

Loader operation does not correspond with control lever movement.

Hydraulic hoses connected wrong.

Correct hose connections. (See IDENTIFY HOSE CONNECTIONS in Service section.)
 

Defective quick-connect coupler.

Replace coupler. (See your John Deere dealer.)

Loader settles from raised position.

Internal leak in control valve or cylinder.

Test for leaks. Install repair kit. (See your John Deere dealer.)
 

Internal leak in multicoupler.

Repair or replace multicoupler. (See your John Deere dealer.)
 

Defective seal in fittings located on top of torque tube.

Inspect fittings for leaks. Replace O-rings and seals if necessary. (See your John Deere dealer.)

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