18.3 m (60 ft) Boom Operation

Outer boom section does not fold out or in or level up or down.

Faulty Switch.

Replace switch.

Damaged or corroded electrical connections.

Repair, replace or clean electrical connection.

Sticking hydraulic spool.

Remove hydraulic spool and clean or (see your John Deere dealer).

Failed solenoid coil or relay.

Replace coil or relay.

Check valve stuck shut in load sense line.

Remove and clean check valve or (See your John Deere dealer.)

Load sense jamming valve not working.

See your John Deere dealer.

Plugged orifice or hydraulic line.

Remove and clean orifice or hydraulic line.

Faulty Cylinder.

See your John Deere dealer.

Boom does not raise or lower.

Faulty Switch.

Replace switch.

Damaged or corroded electrical connections.

Repair, replace or clean electrical connections.

Sticking hydraulic spool.

Remove hydraulic spool and clean or (see your John Deere dealer).

Failed solenoid coil or relay.

Replace coil or relay.

Check valve stuck shut in load sense line.

Remove and clean check valve or (see your John Deere dealer).

Load sense jamming valve not working.

See your John Deere dealer.

Hydraulic compensator pressure not to specification

See your John Deere dealer.

Faulty Lift Cylinders.

See your John Deere dealer.

NXH8,M68440,L12 -19-10JUL98-1/2

One individual boom function does not stop when switch is released or slow to release.

Sticking or faulty switch.

Repair or replace switch.

Faulty solenoid valve.

Repair or replace solenoid valve.

Sticking hydraulic spool assembly.

Clean spool assembly or (see your John Deere dealer).

NXH8,M68440,L12 -19-10JUL98-2/2