JLG Driveable Stock Picker 20MVL

Warning: Always cover the bearing when removed to keep out dirt and abrasives.

Cleaned bearings in nonflammable cleaning solvent and allowed to drip dry.

Used compressed air to dry the bearing without spinning it.

Discarded bearings if the races and balls (or rollers) are pitted, scored, or burned.

Applied a light coat of oil and wrapped it in clean (waxed) paper.

Do not unwrap reusable or new bearings until they are ready to install.

Lubricated new or used serviceable bearings before installation.

When pressing a bearing into a retainer or bore, applied pressure to the outer race.

If the bearing is to be installed on a shaft, applied pressure to the inner race.

Warning: The brake must be released before performing the roll test. This can be accomplished by supplying 24 Volts D.C. to the gray 2-pin brake connector.

Can you rotate the wheel or hub of the gearbox by hand?

Do you feel more drag in the gears only at certain points?

If you answered 'YES' to the previous question, the gears are not rolling freely and should be examined for improper installation or defects.

Do the gears in your unit seem to roll hard?

If you answered 'YES' to the previous question, do not be concerned as long as they roll with consistency.

Do the gears roll with consistency?

Sign off on the wheel drive assembly roll test

Retract mast completely, and check each sequencing cable on outside of masts for excessive slack.

Tighten nylock-nut just enough to remove excessive slack from sequencing cable. The springs should not be compressed more than 25% after adjusting.

Run mast through several cycles to verify cable/chain adjustments and ensure no interference exists between chain anchor brackets and mast.

Sign off on the sequencing cable adjustment

NOTE: Batteries in storage should be kept at 12.5V or higher.

Before testing for battery condition, the open circuit voltage should be taken from each battery. If the voltage of the batteries differs by 0.3 volts or more, the lower voltage battery should be replaced.

Battery Testing Can Be Performed In Two Ways:

1. The batteries can be tested using a battery tester capable of testing 12V 100Ah AGM VRLA (Valve Regulated Lead Acid) batteries, using the instructions of the battery tester manufacturer.

2. If an appropriate battery tester is unavailable, the batteries can be tested by fully charging them withthe charger that is installed on the machine. Then check the battery voltage of each battery - 4 hours - after charging is complete. Batteries less than 12.72 volts should be replaced.

NOTE: If a faulty charger is suspected, the batteries can be charged using a charger that supplies 2.45 volts/cell.

Charging should be terminated when the charge current drops below 1 amp.;

Warning: The brake must be released before performing the roll test. This can be accomplished by supplying 24 Volts D.C. to the gray 2-pin brake connector.

The purpose of a leak test is to make sure the unit is air tight.

Enter the pressure gauge reading

Pressure gauge reading stable after equalization?

Leaks will most likely occur at the pipe plugs, the main seal or wherever o-rings are located.

Any leaks detected at the pipe plugs?

Any leaks detected at the main seal?

Any leaks detected at the o-rings?