JLG Driveable Stock Picker 20MSP

Caution: THE MOTOR MUST BE DISASSEMBLED FROM THE GEARBOX AND DISCONNECTED FROM THE MACHINE CONTROLLER BEFORE BEGINNING THIS PROCEDURE. SEE WHEEL DRIVE ASSEMBLY - REMOVAL FROM MACHINE AND WHEEL DRIVE DISASSEMBLY - MAIN COMPONENTS ON THE PREVIOUS PAGES.

Wrap tape around the end of the motor shaft that interfaces with the gearbox to avoid damage to this area.

Remove the motor flange/brake mount from the motor frame.

Remove the brush housing from the motor frame and armature by tapping the edge of the brush housing with a soft-tipped mallet. The brushes will spring towards the center of the brush housing once it has separated from the armature.

Remove the wave spring washer from the bearing bore of the brush housing and set aside.

Pick a brush and remove the screw that fastens its lead to the brush holder.

Remove the brush and brush spring.

Inspect the brush holder for corrosion. Remove any corrosion that is found.

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

Are the unit's gears rotating freely and properly?

Describe any inconsistencies or difficulties in gear rotation.

Are the gears rolling with consistency?

Describe any inconsistencies in gear rolling.

Sign off on the wheel drive assembly roll test.

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 if bearing is found to be serviceable.

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.

- Mast Sections: Visual inspection for damage, cracks, distortion, or excessive wear. Operates properly.

- Chain Systems: Properly lubricated. Inspected per Service and Maintenance Manual.

- Sequence Cable Systems: Check for proper and secure installation. Visual inspection for damage, cracks, distortion, or excessive wear. Check for proper adjustment.

- Covers or Shields: Check for proper and secure installation.

- Sheave Systems: Check for proper and secure installation. Visual inspection for damage, cracks, distortion, or excessive wear.

- Bearings: Check for proper and secure installation. Visual inspection for damage, cracks, distortion, or excessive wear.

- Slide Pads: Check for proper and secure installation. Visual inspection for damage, cracks, distortion, or excessive wear.

Power up machine by setting the Power Selector (Key) Switch to Ground Control Mode

Raise the platform approximately four (4) to five (5) feet

Hold an object about the size of 8-1/2 x 11 inches directly under one of the sensors. The OSS Control Module (RED) LED will flash if the sensor is working properly

Remove object, allow the LED to stop flashing and check the next sensor

Sign off on the transducer sensor check