GE GE752 manual Removing From Storage, SHIPPING BOX WITH ARMATURE LESS COVER. E±3784

GEK±91584D, Vertical Drilling Motor, Type GE752

examined for rust. Any rust found should be re- moved using fine abrasive paper, after the old slushing compound has been removed with min- eral spirits (GE±D5B8). Methanol should be used to remove all residue.

WARNING: Cleaning solvents may be toxic and/ or inflammable. They can cause serious or fatal injury if used without proper precautions. For safety:

1.Do not inhale solvent fumes.

2.Use solvents only in adequately ventilated areas.

3.Avoid contact of solvent with the skin.

4.Do not expose solvent to flame or sparks.

5.Observe caution statements issued by the manufacturer of the solvent.

Extreme care should be exercised not to dam- age critical machined surfaces such as the ta- pered shaft surface while removing rust. The surfaces should be reslushed with GE±D6C6A1

FIG. 47. SHIPPING BOX WITH ARMATURE,

LESS COVER. E±3784.

slush compound, Kendell Grade 5, or the equiva- lent.

4.Brushes should be removed from their holders and clamped under the spring clips to prevent corrosion of the commutator surface as a result of moisture absorption by the carbon.

5.Do not completely seal the motor, but cover ma- jor vent areas with a waterproof shipping tape. Leave enough opening so the machine can breathe ± i.e., moist air is not trapped. The inten- tion is to prevent entrance of water, dust, small animals, etc., but not to seal airtight. GE does not recommend the use of a silica gel or dehydrating agent.

6.Since the lubricant drains from the top half of bearings during storage, this area is subject to corrosion. The shaft should be rotated periodi- cally to redistribute a protective film. If stored in- side, rotate every three months. If outside, every month. Before placing the machine back into service after prolonged storage (1 year or more) bearings should be inspected and repacked with new grease meeting the recommended GE lubri- cation specification.

7.The machine should be meggered when placed into storage and periodically while in storage (3±month intervals). Keep a record of these megger readings as a rapid decrease in insula- tion resistance indicates the machine condition is deteriorating and the storage conditions inade- quate.

Before placing a stored motor back into service, refer to the applicable instruction ªRemoving Motors From Storageº.

REMOVING FROM STORAGE

Before placing a stored motor in service, perform the following:

1.Blow dust and dirt accumulation out of the wind- ings with clean, dry air.

2.Visually inspect for spring corrosion, sticking brushes in brushholders and general defects.

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