D353 INDUSTRIAL ENGINE Caterpillar

Power Coupling System

Usage:

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

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 Flywheel Clutches And Front Power Take-Off Clutches

(All except D343 oil lubricated clutch)

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

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

LUBRICATING SHIFT LEVER BEARINGS

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

SHIFT COLLAR, SHAFT AND PILOT BEARINGS

3. Lubricate the shaft bearing; 1 fitting on top-rear of 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 D343 Engine Flywheel Clutch

The D343 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

There are two types of Generators: SR4 and SRCR. To determine which generator you have, see the serial number stamped on the generator nameplate. The first group of numbers will be followed by either a "B", or a "T"; "B" designates a SR4 Generator, "T" designates a SRCR Generator. For a complete explanation of the serial number, see the ELECTRIC SET OPERATION INSTRUCTIONS.

The SR4 Generator is a brushless type generator. The SRCR Generator uses slip rings and brushes. Periodically inspect the brushes and/or slip rings for wear and appearance.

If the electric set generator is not of Caterpillar design, see the manufacturer's instructions for the required lubrication and maintenance procedures.

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.

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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 brush tension (SRCR Generators only).

Inspecting Brushes (SRCR Generators only)

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

INSPECT BRUSH SPRING TENSION

New brush length measures 1 1/8 inch (29 mm). Replace the brushes when brush length measures 9/16 (15 mm).

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.

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.

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.

Lubricating The Rear Bearing (All Generators)

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

2. Remove the upper and lower grease fitting plugs.

3. Install the grease fitting in the upper threaded hole.

4. Lubricate with grease until clean lubricant appears at the lower threaded hole.

LUBRICATING BEARING

5. Wipe off the excess grease. Install the lower plug.

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 and wipe off excess grease.

9. Install the two panels.

Marine Gear

Checking Oil Level

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

CHECKING OIL LEVEL

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.

ADDING OIL

MG521 Marine Gear only:

Draining Lubricating Oil

1. Remove the marine gear drain plug.

REMOVING 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 marine gear oil filter housing drain plug.

OIL DRAIN

Installing Marine Gear Oil Filter Element

1. Drain the lubricating oil.

2. Remove the cover, spring, bypass valve and filter element.

REMOVING COVER AND FILTER ELEMENT

REMOVING BOLT

3. Wash the inside of the housing and the cover.

4. Install the housing drain plug.

5. Inspect and install the cover gasket; install a new gasket if necessary.

6. Place the spring and retainer plate on the bolt. Insert the bolt thru the filter and into the cover. Tighten the bolt securely.

MG512 and MG514 Marine Gears:

Draining Lubricating Oil

1. Remove the marine gear drain plug.

REMOVING 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.

REMOVING 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 drain plug.

Cleaning Marine Gear Oil Strainer

1. Remove the strainer plug and strainer.

REMOVING 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.

All Marine Gears:

Filling The Marine Gear Lube System

1. Install the marine gear drain plug, or close the sump pump valve on the oil line to the marine gear.

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NOTICE

Be sure both 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 Lubrication and Maintenance Chart for proper oil.