KUBOTA WSM V3307-DI-T-E3B (01) PDF Document

Before performing any service or repair on your KUBOTA WSM V3307-DI-T-E3B, it is crucial to follow these safety instructions to prevent personal injury. The “Safety Alert Symbol” is used throughout the manual to highlight potential injury risks.

BEFORE SERVICING AND REPAIRING:

• Read all instructions and safety information in the manual and on the engine’s safety decals.

• Clean the work area and the engine thoroughly.

• Park the machine on a firm and level surface.

• Allow the engine to cool completely before starting any work.

• Stop the engine and remove the key.

• Disconnect the negative battery cable first to prevent accidental short circuits.

• Hang a “DO NOT OPERATE” tag in the operator station to alert others.

Safety Alert Definitions:

• DANGER: Indicates an imminently hazardous situation that, if not avoided, will result in death or serious injury.

• WARNING: Indicates a potentially hazardous situation that, if not avoided, could result in death or serious injury.

• CAUTION: Indicates a potentially hazardous situation that, if not avoided, may result in minor or moderate injury.

• IMPORTANT: Indicates that equipment or property damage could occur if instructions are not followed.

• NOTE: Provides helpful information.

To ensure safety while starting and working on your KUBOTA WSM V3307-DI-T-E3B, please adhere to the following guidelines:

SAFETY STARTING:

• Do not start the engine by shorting across the starter terminals or bypassing the safety start switch.

• Avoid unauthorized modifications to the engine, as they may impair its function, safety, and lifespan.

SAFETY WORKING:

• Do not work on the machine while under the influence of alcohol, medication, other substances, or while fatigued.

• Wear close-fitting clothing and appropriate safety equipment for the job.

• Use proper tools. Makeshift tools, parts, and procedures are not recommended.

• When two or more people are working together, ensure all work is performed safely.

• Do not touch rotating or hot parts while the engine is running.

• Never remove the radiator cap while the engine is running or immediately after stopping to avoid hot water spouting out. Wait until the cap is cool enough to touch with bare hands, then loosen it slowly to the first stop to relieve pressure before removing it completely.

• Be aware that escaping fluid (fuel or hydraulic oil) under pressure can penetrate the skin and cause serious injury. Always relieve pressure before disconnecting lines and tighten all connections before applying pressure.

• Wear suitable hearing protection, such as earmuffs or earplugs, to protect against loud noises.

• Do not open the high-pressure fuel system. High-pressure fluid can cause serious injury. Do not disconnect or attempt to repair components between the high-pressure fuel pump and injectors on engines with a high-pressure common rail fuel system.

• High voltage (exceeding 100 V) is generated in the ECU and applied to the injector. Use sufficient caution to avoid electric shock.

To prevent fires and other potential hazards when servicing your KUBOTA WSM V3307-DI-T-E3B, follow these critical safety measures:

AVOID FIRES:

• Fuel is extremely flammable and explosive. Do not smoke or allow flames or sparks in your work area.

• To prevent sparks from accidental short circuits, always disconnect the battery negative cable first and connect it last.

• Battery gas can explode. Keep sparks and open flames away from the top of the battery, especially during charging.

• Ensure no fuel has been spilled on the engine.

VENTILATE WORK AREA:

• If the engine must be running, ensure the area is well-ventilated. Never run the engine in a closed space, as exhaust gas contains poisonous carbon monoxide.

PREVENT ACID BURNS:

• Sulfuric acid in battery electrolyte is poisonous and can burn skin, clothing, and cause blindness. Keep electrolyte away from eyes, hands, and clothing. If you spill electrolyte on yourself, immediately flush with water and get medical attention.

DISPOSE OF FLUIDS PROPERLY:

• Do not pour fluids into the ground, a drain, or any body of water. Follow relevant environmental protection regulations when disposing of oil, fuel, coolant, electrolyte, and other harmful waste.

PREPARE FOR EMERGENCIES:

• Keep a first aid kit and fire extinguisher readily available at all times.

• Keep emergency numbers for doctors, ambulance services, hospitals, and fire departments near your telephone.

The following table lists the specifications for the KUBOTA WSM V3307-DI-T-E3B engine model.

The engine model and serial number are essential for servicing or ordering parts for your KUBOTA WSM V3307-DI-T-E3B. They are marked on the engine. The serial number indicates the month and year of manufacture.

Year of Manufacture:

The year is indicated by a number or letter. For example, ‘7’ indicates 2007, ‘8’ indicates 2008, ‘A’ indicates 2010, and so on.

Month of Manufacture:

The month is encoded in the engine lot number, which is a letter followed by numbers. For example, ‘A0001 ~ A9999’ indicates January.

Example Serial Number Breakdown: V3307-T – 7 V A001

• (a) Engine Model Name: V3307-DI-T

• (b) Year: 7 indicates 2007

• (c) Month: U or V indicates October

• (d) Lot number: A001

E3B Engine Identification:

The E3B designation identifies engine models that comply with specific Non-Road Emission Standards. This designation is not marked on the engine itself but is part of the full engine model name (e.g., V3307-DI-T-E3B). On the US EPA label, E3B engines are identified with “ET” at the end of the Model designation.

When working on your KUBOTA WSM V3307-DI-T-E3B, follow these precautions to ensure proper reassembly and safe operation:

• During disassembly, carefully arrange all removed parts in a clean area to avoid confusion. Replace screws, bolts, and nuts in their original positions.

• Use only genuine KUBOTA special tools when required.

• Always disconnect the negative battery cable before servicing any live wires.

• Clean all oil and dirt from parts before measuring them.

• Use only genuine KUBOTA parts for replacements to maintain engine performance and safety.

• Always replace gaskets and O-rings during reassembly. Apply grease to new O-rings or oil seals before installing them.

• When reassembling snap rings, position them so the sharp edge faces away from the direction of applied force.

• After servicing, perform a proper run-in of the engine. Do not apply a heavy load immediately, as this could cause serious damage.

To maintain long-lasting and safe performance of your KUBOTA WSM V3307-DI-T-E3B, follow this regular inspection schedule. Items marked with an asterisk (*) are emission-related critical parts.

Note on Engine Oil Change Interval:

Change the engine oil every 500 hours or 1 year, whichever comes first. The initial oil change is at 50 hours. This applies to API service classification CF grade or above, with an ambient temperature below 35 °C (95 °F).

Engine Oil:

The recommended API classification of engine oil depends on the fuel type used and whether the engine has an EGR system. For the KUBOTA WSM V3307-DI-T-E3B with external EGR, use the following guidelines:

• CJ-4 oil is not recommended. Oil should have the proper SAE viscosity for the ambient temperature.

• When using high sulfur fuel, it is advisable to use an oil with a high Total Base Number (TBN) of at least 10.

Fuel:

• Cetane Rating: Minimum of 45. A rating greater than 50 is preferred, especially in cold temperatures or at high altitudes.

• Sulfur Content: Use of diesel fuel with sulfur content less than 0.10% (1000 ppm) is strongly recommended. Do not use fuels with sulfur content greater than 1.0% (10000 ppm).

• Fuel Type: Diesel fuels specified to EN 590 or ASTM D975 are recommended. No. 2-D is a suitable distillate fuel.

Checking Engine Oil Level:

1. Ensure the engine is on a level surface.

2. Pull out the dipstick, wipe it clean, reinsert it fully, and then pull it out again.

3. Check that the oil level is between the upper and lower notches.

4. If the level is low, add new oil through the oil filler plug to bring it to the specified level. Do not overfill.

IMPORTANT: Never mix two different types or brands of oil. If changing oil type, drain the old oil completely first.

Checking and Replenishing Coolant:

1. Check the coolant level in the recovery tank. It should be between the FULL and LOW marks.

2. If the level is low, add the appropriate coolant mixture. If the coolant brand is unknown, drain the system and refill with a new brand of coolant mix.

CAUTION: Do not remove the radiator cap when the engine is hot. Wait for it to cool, then loosen the cap slightly to relieve pressure before removing it completely.

IMPORTANT:

• When filling, jiggle the radiator hoses to vent air from the system.

• Ensure the radiator cap is closed securely.

• Do not mix different types of Long Life Coolant (L.L.C.).

Initial 50-Hour Service:

Changing Engine Oil:

1. Warm up the engine for about 5 minutes, then stop it.

2. Place an oil pan under the engine.

3. Remove the drain plug and drain the oil completely.

4. Reinstall the drain plug securely. Tightening torque is 45 to 53 N·m (33 to 39 lbf·ft).

5. Refill with new oil of the proper viscosity up to the upper line on the dipstick.

Replacing Oil Filter Cartridge:

1. With the engine stopped, remove the old oil filter cartridge with a filter wrench.

2. Apply a thin coat of new engine oil to the gasket of the new cartridge.

3. Screw the new cartridge on by hand until the gasket makes contact, then tighten it an additional amount as specified by the filter manufacturer. Over-tightening can damage the gasket.

4. After installation, start the engine and check for leaks. Stop the engine, wait a few minutes, and re-check the oil level, adding oil if necessary.

Checking Fan Belt Tension:

1. Press the fan belt halfway between the fan drive pulley and alternator pulley with a force of 98 N (10 kgf, 22 lbf).

2. The deflection should be between 10.0 to 12.0 mm (0.394 to 0.472 in.).

3. If adjustment is needed, loosen the alternator mounting screws, reposition the alternator to achieve the correct tension, and retighten the screws.

4. Also, inspect the belt for damage, cracks, or wear. Replace if necessary.

Every 50-Hour Service:

Checking Fuel Hoses and Clamp Bands:

1. With the engine stopped, inspect all fuel hoses for cracks, swelling, or damage. Replace every two years, or sooner if deterioration is found.

2. Check all clamp bands for looseness. Tighten if necessary.

3. After replacing any fuel hose, bleed the fuel system to remove air.

Here are common issues and solutions for the KUBOTA WSM V3307-DI-T-E3B engine:

Engine Does Not Start:

• No fuel: Replenish fuel.

• Air in fuel system: Vent the air.

• Fuel filter/hose clogged: Clean or replace.

• Incorrect injection timing: Adjust timing.

• Injection pump/nozzle malfunction: Repair or replace.

• Severe compression leak: Check head gasket, tighten cylinder head screws, etc.

• Starter does not run: Check battery charge, starter function, and wiring.

Engine Revolution Is Not Smooth:

• Fuel filter or air cleaner clogged: Replace or clean.

• Injection pump/nozzle malfunction: Repair or replace.

• Governor malfunctioning: Repair.

• Turbocharger issues (bearing wear, bent shaft): Replace the turbocharger assembly.

White or Blue Exhaust Gas:

• Excessive engine oil: Reduce to specified level.

• Piston ring and/or cylinder worn/stuck: Repair or replace.

• Incorrect injection timing: Adjust.

Black or Dark Gray Exhaust Gas:

• Engine overload: Reduce the load.

• Fuel filter or air cleaner clogged: Replace or clean.

• Deficient nozzle injection: Repair or replace nozzle.

Deficient Output:

• Incorrect injection timing: Adjust.

• Compression leak: Check compression pressure and repair as needed.

• Air leak from compressor discharge or gas leak from exhaust: Repair or replace gaskets/hoses.

Excessive Lubricant Oil Consumption:

• Piston ring issues (worn, stuck, gap alignment): Replace piston rings, shift gap direction.

• Worn valve stem and valve guide: Replace.

• Leaking seals or packing: Replace.

Low Oil Pressure:

• Engine oil insufficient: Replenish oil.

• Oil strainer clogged: Clean.

• Relief valve stuck or spring broken: Clean or replace.

• Oil pump defective: Replace.

Engine Overheats:

• Coolant insufficient: Replenish coolant.

• Fan belt broken or loose: Replace or adjust.

• Radiator clogged or corroded: Clean or replace.

• Radiator cap defective: Replace.

• Head gasket defective: Replace.

When tightening fasteners on your KUBOTA WSM V3307-DI-T-E3B, use a torque wrench to meet the specified values. For fasteners marked with an asterisk (*), apply engine oil to the threads and seats before tightening.

General Use Screws and Bolts:

Special Use Screws, Bolts, and Nuts:

Top Clearance Check:

1. With the cylinder head removed, place the piston at top dead center.

2. Place fuse wires (1.5 mm dia.) on the piston top, avoiding valve and combustion chamber port areas.

3. Reinstall the cylinder head with a new gasket and tighten the head screws to the specified torque: 187 to 196 N·m (138 to 144 lbf·ft).

4. Rotate the crankshaft to squeeze the fuse wires.

5. Remove the cylinder head and measure the thickness of the squeezed wires. The top clearance should be 0.60 to 0.80 mm (0.024 to 0.031 in.).

Cylinder Head Surface Flatness:

1. Clean the cylinder head surface.

2. Using a straightedge and feeler gauge, check for distortion across the four sides and two diagonals.

3. The allowable limit for flatness is 0.05 mm (0.002 in.). If exceeded, the head must be corrected.

Valve Recessing:

1. Insert a valve into its guide and measure the depth of the valve head below the cylinder head surface using a depth gauge.

2. The factory specification for recessing is 0.65 to 0.85 mm (0.026 to 0.033 in.). The allowable limit is 1.20 mm (0.0472 in.). If exceeded, the valve must be replaced.

Valve Lapping:

1. Apply a thin, even layer of lapping compound to the valve face.

2. Insert the valve and use a lapping tool to rotate it against the seat.

3. Clean the valve and seat, then apply Prussian blue to check the contact pattern. A good seat will show contact on at least 70% of the surface. If not, continue lapping.

Clearance between Valve Stem and Valve Guide:

1. Measure the valve stem’s outer diameter (O.D.) and the valve guide’s inner diameter (I.D.).

2. Calculate the clearance. The factory specification is 0.055 to 0.085 mm (0.0022 to 0.0033 in.). The allowable limit is 0.10 mm (0.0039 in.). If exceeded, replace the valve and/or guide.

Removing the Fuel Injection Pump Unit:

1. Detach the window cover from the flywheel housing and remove the oil cap.

2. Set the 4th cylinder piston to top dead center of its compression stroke and fix the flywheel.

3. Mark the alignment of the idle gear and injection pump gear to aid in reassembly.

4. Unscrew the two plugs on the injection pump unit.

5. Tighten the upper and lower fuel camshaft lock screws (dog point type recommended) until they contact the camshaft to lock it in place. Do not overtighten.

6. Disconnect the lubricating oil pipe.

7. Place an injection timing mark on the pump unit and crankcase.

8. Loosen the three injection pump unit mounting nuts and remove the pump unit support to take out the injection pump unit.

Reassembling the Fuel Injection Pump Unit:

1. With the 4th piston at top dead center, install the injection pump unit into the crankcase.

2. Align the marks on the injection pump gear and the idle gear.

3. Remove the fuel camshaft lock screws and reinstall the plugs.

4. Align the injection timing marks on the pump unit and crankcase by moving the pump clockwise (viewed from front).

5. Tighten the injection pump unit mounting nuts to 18 to 20 N·m (13 to 15 lbf·ft).

6. Reconnect the lubricating oil pipe and install the pump unit support and window cover.

7. Remove the flywheel stopper.

8. Check the injection timing. If it is not within specification, repeat the adjustment procedure.

Piston and Connecting Rod Service:

1. Removal: After removing the cylinder head and oil pan, remove the connecting rod cap and push the piston and rod assembly out through the top of the cylinder.

2. Disassembly: Use a piston ring tool to remove the piston rings. Remove the piston pin to separate the piston from the connecting rod.

3. Inspection:

• Piston Pin Bore I.D.: Measure the piston pin bore. The allowable limit is 28.05 mm (1.104 in.).

• Oil Clearance (Piston Pin to Small End Bushing): Measure the piston pin O.D. and small end bushing I.D. The allowable clearance is 0.15 mm (0.0059 in.).

• Piston Ring Gap: Insert each ring into the cylinder and measure the end gap. The allowable limit for all rings is 1.25 mm (0.0492 in.).

• Ring to Groove Clearance: Measure the clearance between the piston ring and its groove. Allowable limits are: Top ring 0.15 mm, Second ring 0.20 mm, Oil ring 0.15 mm.

4. Reassembly:

• Be sure that the crankpin bearing ID color and connecting rod ID color match.

• Assemble rings with the manufacturer’s mark facing up. Stagger the ring gaps according to the manual diagram.

• Assemble the piston to the rod with the “↑” mark on the piston and the numbering mark on the rod facing the same direction.

• Use a piston ring compressor to carefully install the assembly into the cylinder, with the mark on the connecting rod facing the injection pump.

• Tighten connecting rod screws to 69 to 73 N·m (51 to 54 lbf·ft).

Crankshaft Service:

1. Side Clearance: Measure the crankshaft end play. The allowable limit is 0.50 mm (0.020 in.). If exceeded, replace the thrust bearings.

2. Alignment (Bend): Support the crankshaft on V-blocks and measure the runout at the center journal. The allowable limit for misalignment is 0.02 mm (0.0008 in.).

3. Oil Clearance (Crankpin): Use plastigage to measure the oil clearance between the crankpin and connecting rod bearing. The allowable limit is 0.20 mm (0.0079 in.).

4. Oil Clearance (Journal): Use plastigage to measure the oil clearance between the crankshaft journal and main bearing. The allowable limit is 0.20 mm (0.0079 in.).

• If clearances are excessive, replace the bearings. If wear on the crankshaft is significant, it may need to be ground for use with undersize bearings.

Cylinder Wear Inspection:

1. Using a cylinder gauge, measure the inner diameter (I.D.) of the cylinder at six different points (top, middle, and bottom, in two directions) to find the maximum and minimum diameters.

2. The difference between the maximum and minimum I.D. is the maximum wear.

3. The factory specification for the cylinder bore I.D. is 94.000 to 94.022 mm (3.7008 to 3.7016 in.).

4. The allowable limit for the cylinder bore I.D. is 94.15 mm (3.707 in.).

5. Visually inspect the cylinder wall for deep scratches or scoring.

Correcting Cylinder (Oversize):

1. If the cylinder wear exceeds the allowable limit or if there are deep scratches, the cylinder must be bored and honed to the next oversize dimension.

2. For the KUBOTA WSM V3307-DI-T-E3B, the oversize dimension is 94.500 to 94.522 mm (3.7205 to 3.7213 in.). The maximum wear limit for an oversized cylinder is 94.65 mm (3.726 in.).

3. After boring, the surface should be finished by honing to a surface roughness of 2.2 to 3.0 µm Rz.

4. When a cylinder is bored to an oversize dimension, you must use corresponding oversize pistons and piston rings (0.5 mm oversize for this model).

NOTE: If an oversize cylinder becomes worn beyond its allowable limit, the entire cylinder block must be replaced with a new one.