3406 MARINE ENGINE Caterpillar


Power Coupling System

Usage:



Power Coupling System Flywheel And/Or Front Power Take-Off Clutches

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 Engagement

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

2. Turn the clutch until the lock pin, engaged in the locking ring, is visible.
3. Pull the lock pin out and rotate the locking ring clockwise until the lock pin pops into the next notch.

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 Flywheel Clutches and Front Power Take-Off Clutches: (All Except Heavy Duty Clutches)

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

1. Lubricate the shift-collar bearings sparingly; 1 fitting at top left of center.
2. Lubricate the main shaft bearing; 1 fitting located above the output shaft on the bearing cage.

3. Lubricate the shift lever bearings; 1 fitting on each side of the clutch housing.
4. 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.

Lubricating Heavy Duty Clutches

The heavy duty 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

Generator Set

Your electric set engine may be equipped with a Caterpillar SR4 Generator. The SR4 Generator is a brushless design, and therefore requires no periodic maintenance other than lubrication of the rear bearing.

The generator serial number is stamped on the generator housing. The first group of numbers, reading from the left, indicates the frame size. Following this number are the letters BS, BH, or BG. The letter B indicates the generator is of the SR4 design. The letter S, H or G indicates the voltage rating of the generator. The following numerical digits are the serial number of the generator in that particular frame size and voltage rating. A complete explanation of the numbers and letters in the serial number are found in the ELECTRIC SET OPERATION INSTRUCTIONS, Section B. Always use the complete serial number in your communications with your Caterpillar dealer.


GENERATOR SERIAL NUMBER LOCATION

If you have a generator of other than Caterpillar design, see the Manufacturer's Instructions.

SR4 Generator Lubrication

Lubricating Generator Rear Bearing

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

2. Remove the upper and lower grease fitting plugs.

3. Install a grease fitting in the upper threaded hole.
4. Lubricate with grease until clean lubricant appears at the lower threaded hole.

5. Install the lower plug. Wipe off excess grease.
6. Remove the fitting from the upper threaded hole.
7. Start the engine and allow the grease to expand from the upper hole.
8. Stop the engine. Install the plug in the upper hole. Wipe off the excess grease.
9. Install the three panels which were removed.

Marine Gear

Checking Oil Level

1. Check the oil level with the engine warm, idling, and the clutch engaged.

2. Maintain oil level at the FULL mark on the oil level gauge. Add oil through the breather tube on top of the marine gear housing. Refer to Lubrication and Maintenance Chart for proper oil to use.

Draining Lubricating Oil

1. Remove the marine gear drain plug.

If a sump pump is used:

a. Connect a drain line to the top outlet of the sump pump.


SUMP PUMP VALVES AND PUMP OUTLET

b. Be sure the valve on the engine oil pan line is closed. Marks on the valve must be turned at right angles to the direction of the oil line.
c. Open the valve on the marine gear oil line.
d. Operate the sump pump handle until the oil is drained.
2. Remove the oil filter cover and filter element.

3. Reach down thru the oil and locate the filter housing drain plug. Remove the plug. The oil will drain into the marine gear sump.
4. Wash the cover and inside the filter housing.
5. Install the drain plug in the bottom of the filter housing.
6. Inspect and install the cover gasket. Install a new gasket if necessary.
7. Place the spring and retainer plate on the bolt. Insert the bolt thru the filter into the cover. Tighten the bolt securely.

8. Install the marine gear filter cover.

Cleaning Marine Gear Oil Strainer

1. Remove the strainer plug and strainer.

2. Wash the strainer in clean diesel fuel or solvent.
3. Inspect the strainer. Install the strainer; or replace it if necessary.
4. Install the plug.

Filling The Marine Gear Lube System

1. Be sure the marine gear drain plug has been installed, or the sump pump valve on the oil line to the marine gear drain line has been closed.


NOTICE

Be sure the valves (one to the marine gear and one to the engine oil pan) are closed. Otherwise, a transfer of oil during operation may occur and damage could result.


2. Fill the marine gear to the FULL mark on the oil level gauge. Refer to the Lubrication and Maintenance Chart for proper oil viscosity and type of oil to use.

Cleaning The Breather

1. Remove the breather.

2. Wash the breather in clean diesel fuel or solvent.
3. Install the breather.

Output Shaft Seal

Lubricate the output shaft seal, 1 fitting at top rear of marine gear output shaft. Slowly rotate the output shaft while lubricating the seal.

Caterpillar Information System:

3406 MARINE ENGINE Electrical System
3406 MARINE ENGINE Air Starting System
3406 MARINE ENGINE Cooling System
3406 MARINE ENGINE Fuel System
3406 MARINE ENGINE Air Induction And Exhaust System
3406 MARINE ENGINE Engine Lubrication System
3406 MARINE ENGINE Lubrication And Maintenance Chart
3406 MARINE ENGINE Operating Under Abnormal Conditions
3406 MARINE ENGINE Shutoff Devices
3406 MARINE ENGINE Emergency Alarms
3406 MARINE ENGINE Automatic Start-Stop
3406 MARINE ENGINE Woodward Governor Operation
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