G343 INDUSTRIAL ENGINE Caterpillar

Power Coupling System

Usage:

Enclosed Clutches And/Or Front Power Take-Off

Checking Clutch Adjustment

While engaging the clutch to pick up the load, check the clutch adjustment. The clutch should engage with a hard push and distinct snap. If engagement is "soft", adjust the clutch.

Adjusting Clutch

1. Stop the engine and remove the clutch inspection cover.

CLUTCH INSPECTION COVER

2. Turn the clutch until the lock pin, engaged in the locking ring, is visible.

3. Disengage the lock pin and rotate the locking ring clockwise until the lock pin engages the next notch.

PULLING LOCKING PIN

4. Test the clutch adjustment. If still too "soft", rotate the ring to the next notch. If the adjustment is too tight-turn the ring back one notch.

5. Install the cover.

Lubricating Front Power Take-Off Clutch

Lubricate the clutch bearings with grease, 1 or 2 strokes each fitting.

1. Lubricate the shift lever bearings; 1 fitting on each side of the clutch housing.

LUBRICATING SHIFT LEVER BEARINGS

2. Lubricate pilot bearing; 1 fitting at the end of shaft. If this fitting is not accessible, remove the plug located on the circumference of the shaft near the rear of the housing, and install a fitting.

PILOT, SHIFT COLLAR AND SHAFT BEARINGS

3. Lubricate shift-collar and shaft; 1 fitting at top-left of center.

4. Lubricate the shaft bearing; 1 fitting on top-rear of housing.

Lubricating Flywheel Clutch

The G343 flywheel clutch main shaft bearing is oil lubricated. The remaining bearings are lubricated with grease.

1. Lubricate the shift lever bearings; 1 fitting on each side of clutch housing.

SHIFT LEVER BEARING

2. Lubricate the pilot bearing; 1 fitting at the end of shaft. If this fitting is not accessible, remove the plug located on the circumference of the shaft near the rear of the housing, and install a fitting.

PILOT AND SHIFT COLLAR BEARINGS

3. Lubricate the shift-collar bearing; 1 fitting at top-left of center.

4. Check the main shaft bearing oil reservoir level with engine stopped. Maintain the oil level at the FULL mark on the oil level gauge. Add oil through the filler tube on top of the bearing cage housing. Refer to Lubrication and Maintenance Chart for proper oil.

CHECKING OIL LEVEL

5. To drain the reservoir: Remove the drain plug located on the lower left side of the shaft bearing reservoir. Drain and install the drain plug. Fill to the FULL mark on the oil level gauge. Install the filler cap.

CLUTCH SHAFT BEARING DRAIN PLUG

Electric Set Generator

Inspecting Slip Ring

1. Remove the two lower panels from the rear of the generator housing.

2. Inspect the slip ring color. The slip ring color may be shiny copper to straw, or chocolate to black, but the color must be uniform to indicate satisfactory operation.

If the ring is basically one of the above shades, but contains blotches of green, blue or black, clean the ring with an electrical cleaning solvent.

Show/hide table

NOTICE

Do not use gasoline or carbon tetrachloride. Both solvents will dissolve insulation. The vapors from carbon tetrachloride can be harmful when inhaled.

3. Inspect the slip ring for pitting. If the slip rings are rough, pitted, or worn eccentric, contact your Caterpillar dealer. The rings must be reconditioned.

4. Check the following to determine the cause for pitting:

A. Check the generator nameplate rating. The generator load must be within this rating.

B. Check the brush tension.

Inspecting Brushes

The brush must move freely within the holder, but with enough spring tension to prevent brush flotation during operation.

INSPECT BRUSH SPRING TENSION

If the spring is moved forward and the brush tension is greater than chart specifications, release the spring one notch. Excessive spring tension will cause excessive brush wear.

If brush tension is weak, push the spring forward into the next notch. If the spring is in the front notch, remove the brush and check the brush length. If the brush length is less than the minimum required, install a new brush.

Installing New Brushes

1. Release spring tension.

2. Disconnect the lead wire from the brush and pull the brush from the brush holder.

3. Insert a new brush. Be sure it moves freely in the brush holder. Connect the lead wire.

4. Place a narrow piece of "00" sandpaper between the brush and slip ring with the abrasive surface against the brush. (Never use emery cloth as the emery contains small metallic particles which will damage the copper.)

5. Engage the spring in the middle notch.

6. Slowly pull the sandpaper from beneath the brush.

7. Remove all dust with a suction hose. If suction is not available, use a very low pressure blower. Do not use metal hose tips.

8. Check brush tension.

9. Install the two panels.