Kubota D722 Engine
The Kubota D722 is a compact, high-performance diesel engine widely used in various small agricultural and industrial applications. This 3-cylinder, 4-stroke engine is part of Kubota’s Super Mini series, known for its reliability and efficiency.
With a displacement of 0.719 liters (719 cc), the D722 delivers impressive power in a small package. It generates approximately 20 horsepower at 3600 rpm, making it suitable for equipment like tractors, mowers, excavators, and generators. The engine features a bore of 67 mm and a stroke of 68 mm, contributing to its compact design.
The D722 utilizes a water-cooled system and indirect fuel injection, ensuring optimal performance and fuel efficiency. It’s equipped with a Bosch MD mini fuel injection pump and a Bosch throttle type injection nozzle. The engine’s compression ratio is 23.0:1, which aids in its power output and fuel economy.
Designed with durability in mind, the D722 incorporates features like a spherical type combustion chamber with a glow plug for improved cold-start capability. It also includes a centrifugal ball mechanical governor to maintain consistent engine speed under varying loads.
The engine’s compact dimensions (approximately 426 mm x 398 mm x 519 mm) and lightweight design (around 63 kg) make it ideal for integration into various types of equipment where space is at a premium. Its versatility is further enhanced by its compliance with EPA/CARB Tier 4 emissions standards, making it environmentally friendly.
Maintenance of the D722 is straightforward, with easy access to key components. The engine is known for its longevity and reliability, often running for thousands of hours with proper care. Its widespread use across different applications has also ensured good availability of parts and service support.
Overall, the Kubota D722 Super Mini diesel engine offers a balance of power, efficiency, and compact design, making it a popular choice for manufacturers and end-users in need of a reliable small diesel engine for their equipment or projects.
Kubota D722 Specs
The Kubota D722 is a compact, high-performance diesel engine with the following key specifications:
Engine Type:
– 3-cylinder, 4-stroke diesel engine
– Water-cooled
– Indirect fuel injection
Displacement: 0.719 liters (719 cc)
Dimensions:
– Length: 426 mm
– Width: 398 mm
– Height: 519 mm
Weight: Approximately 63 kg
Performance:
– Power output: 14.9 kW (20 HP) at 3600 rpm
– Torque: 45.8 Nm at 2600 rpm
Engine Details:
– Bore: 67 mm
– Stroke: 68 mm
– Compression ratio: 23.0:1
Features:
– Bosch MD mini fuel injection pump
– Bosch throttle type injection nozzle
– Centrifugal ball mechanical governor
– Glow plug for cold starting
The D722 is part of Kubota’s Super Mini series and is designed for use in various compact equipment like tractors, mowers, excavators, and generators. It meets EPA/CARB Tier 4 emissions standards, making it environmentally friendly. The engine is known for its reliability, fuel efficiency, and compact size, making it ideal for applications where space is limited but power is needed.
Kubota D722 Oil Filter
When selecting an oil filter for the Kubota D722 engine:
– Choose a filter compatible with the D722’s specifications and mounting requirements
– Consider both OEM and high-quality aftermarket options
– Look for filters designed for small diesel engines with similar displacement
– Ensure the filter can handle the engine’s oil flow rate and pressure
Key factors to keep in mind:
– Proper filtration efficiency to remove contaminants
– Correct size and thread pitch for easy installation
– Durability to withstand engine vibrations and heat
– Reasonable price while maintaining quality
Regular oil and filter changes are crucial for maintaining the D722 engine’s performance and longevity.
Kubota D722 Oil Capacity
The Kubota D722 engine has the following oil capacity specifications:
For engines with an oil pan depth of 101 mm (3.98 inches):
– Oil capacity: 3.2 L (3.38 US quarts, 2.82 Imperial quarts)
For engines with an oil pan depth of 121 mm (4.76 inches):
– Oil capacity: 3.8 L (4.00 US quarts, 3.31 Imperial quarts)
The recommended engine oil type is CD or CE grade. For viscosity, SAE 10W-30 or 10W-40 is recommended.
It’s important to check the specific oil pan depth of your D722 engine to determine the correct oil capacity. Always refer to your engine’s manual for the most accurate information regarding oil capacity and recommended oil types for your particular model and application.
Kubota D722 Parts
When looking for parts for the Kubota D722 engine:
– Consider both OEM and high-quality aftermarket options
– Ensure compatibility with your specific D722 model and application
– Common replacement parts include:
– Oil filters
– Fuel filters
– Air filters
– Gaskets and seals
– Glow plugs
– Starter motors
Key points to keep in mind:
– Verify part numbers and specifications before purchasing
– Choose reputable suppliers for reliable parts
– Consider complete overhaul kits for major engine rebuilds
– Regular maintenance with quality parts helps extend engine life
Always consult your engine manual or a Kubota dealer for specific part recommendations and proper installation procedures.
Kubota D722 Parts List
Engine Components:
– Pistons
– Piston rings
– Connecting rods
– Crankshaft
– Camshaft
– Valves (intake and exhaust)
– Cylinder head
– Engine block
– Oil pan
Fuel System:
– Fuel injectors
– Fuel injection pump
– Fuel filter
– Fuel lines
Air Intake:
– Air filter
– Intake manifold
Cooling System:
– Radiator
– Water pump
– Thermostat
– Coolant hoses
Lubrication System:
– Oil filter
– Oil pump
– Oil cooler
Electrical Components:
– Starter motor
– Alternator
– Glow plugs
Other Parts:
– Gasket set
– Timing belt/chain
– V-belt
– Muffler/exhaust system
When ordering parts, it’s important to have your engine’s serial number to ensure compatibility. Many components are specific to particular production runs or variations of the D722 engine. For critical components, using genuine Kubota parts is often recommended to maintain engine performance and reliability.
Kubota D722 Starter
When looking for a starter for the Kubota D722 engine:
– Choose a starter compatible with the D722’s specifications
– Options include both OEM and aftermarket starters
– Key features to consider:
– Voltage: 12V
– Power rating: Approximately 0.8 kW
Important points:
– Verify compatibility with your specific D722 model
– Check for proper mounting and electrical connections
– Consider durability and reliability ratings when selecting
– Compare prices from different suppliers for the best value
Proper installation and regular maintenance of the starter can help ensure reliable engine starting and extend its service life.
Kubota D722 Engine Parts Manual PDF
The Kubota D722 Engine Parts Manual typically contains the following key sections:
1. Engine Identification
– Engine serial number location and recording
2. Parts Lists
– Organized by engine component/system
– Includes part numbers, quantities, and descriptions
3. Engine Specifications
– Technical details like displacement, bore, stroke, etc.
4. Diagrams and Illustrations
– Exploded views of engine assemblies
5. Maintenance Items
– Suggested stocking guide for common parts
6. Component-Specific Sections
– Oil pan
– Cylinder head
– Fuel system
– Cooling system
– Electrical components
7. Serial Number Specific Parts
– Notes on parts that vary by engine serial number
8. Gasket Sets
– Upper and lower gasket kit contents
9. Emissions Compliance Information
– Tier/Stage ratings
10. Engine Dimensions and Weight
11. Performance Specifications
– Power output, torque, etc.
The manual provides detailed breakdowns of each engine subsystem, allowing technicians and owners to identify and order the correct replacement parts for maintenance and repairs. It’s an essential reference for anyone working on or servicing a Kubota D722 engine.
Kubota D722 Fuel Filter
For the Kubota D722 engine, some common fuel filter options include:
– Part number 15531-43013: Fuel filter assembly
– Part number 1G313-43010: Fuel filter assembly
– Part number 70000-43081: Fuel filter element
Key points for replacement:
– Verify compatibility with your specific D722 model
– Follow proper installation procedures in the engine manual
– Replace at recommended intervals, typically every 400-800 hours
– Consider replacing related seals/gaskets during filter change
– Properly prime the fuel system after filter replacement
To install a fuel filter on a Kubota D722 engine, follow these steps:
1. Locate the fuel filters:
– There are typically two filters: a primary filter near the fuel tank and a secondary filter near the injection pump.
2. Prepare for replacement:
– Turn off the engine and allow it to cool
– Place a container under the filter to catch any spilled fuel
– Clamp off fuel lines if necessary
3. Remove the old filter:
– Use needle-nose pliers to loosen and remove the hose clamps
– Disconnect the fuel lines from the old filter
– Twist and pull to remove the old filter
4. Install the new filter:
– Identify the correct flow direction (look for an arrow on the filter)
– Attach the new filter, ensuring it’s oriented correctly
– Reconnect the fuel lines
– Secure the hose clamps
5. Prime the system:
– Turn the ignition key to the “ON” position to activate the fuel pump
– Allow the system to prime for a few moments
6. Start and check:
– Start the engine and check for leaks
– Ensure proper engine operation
Remember to use the correct filter for your specific D722 model. Common part numbers include 70000-43081 and 15531-43013, but always verify compatibility with your engine’s serial number.
Regular fuel filter replacement (typically every 400-800 hours) is crucial for maintaining engine performance and preventing fuel system issues.
Regular fuel filter changes are crucial for maintaining fuel system performance and preventing engine issues. Always use high-quality filters designed for the D722 engine to ensure proper filtration and protection.
To access the fuel filter on a Kubota D722 engine:
1. Locate the fuel filter:
– There are typically two filters – a primary filter near the fuel tank and a secondary filter near the injection pump.
2. Prepare for access:
– Turn off the engine and allow it to cool
– Place a container underneath to catch any spilled fuel
3. Remove obstructions:
– Check for any wires, hoses or components blocking access
– You may need to remove zip ties or clamps securing nearby wires
4. Clear space around the filter:
– Gently move any wires or lines out of the way to gain clear access
– Be careful not to damage any components
5. Locate mounting points:
– The filter is usually held in place by a mounting bracket or directly threaded onto the engine
6. Prepare for removal:
– Have your replacement filter and any needed tools ready
– Clamp off fuel lines if there’s no shutoff valve
Once you have clear access, you can proceed with removing the old filter and installing the new one. Always refer to your engine’s manual for the exact location and any model-specific instructions.
The Kubota D722 uses a Bosch MD mini fuel injection pump. This pump is located near the engine block and connects to the fuel injectors. To access the injection pump, you may need to remove some surrounding components.
When troubleshooting fuel delivery issues, it’s recommended to check fuel flow from the tank and through the filters before suspecting an injection pump problem. The injection pump works in conjunction with an electric shutoff solenoid.
Removing the injection pump requires care, as it may not lift out easily even when bolts are removed. There are two types of rack pins on D722 injection pumps – grooved and non-grooved. It’s important to select the correct type when replacing.
Complete failure of the injection pump is uncommon, but issues with internal components like springs can occur. If suspecting an injection pump issue, it’s advisable to check for fuel spray from the pump ports when cranking the engine.
Reconditioned or exchange injection pumps are available as replacement parts. When dealing with injection pump problems, it’s often best to consult a diesel specialist or authorized Kubota dealer for proper diagnosis and repair.
The injection pump is a critical component for fuel delivery and engine performance. Regular maintenance and using clean fuel can help prevent issues with the pump. If replacement is needed, ensure you get a compatible pump for your specific D722 engine model and serial number.
Kubota D722 Injection Pump
The key points about the Kubota D722 injection pump include:
1. The D722 uses a Bosch MD mini fuel injection pump.
2. The injection pump is located near the engine block and connects to the fuel injectors.
3. It works in conjunction with an electric shutoff solenoid.
4. There are two types of rack pins on D722 injection pumps – grooved and non-grooved. It’s important to select the correct type when replacing.
5. Removing the injection pump can be tricky, as it may not lift out easily even when bolts are removed.
6. Complete failure of the injection pump is uncommon, but issues with internal components like springs can occur.
7. When troubleshooting, it’s advisable to check for fuel spray from the pump ports when cranking the engine.
8. Reconditioned or exchange injection pumps are available as replacement parts.
9. The pump is a critical component for fuel delivery and engine performance.
10. When dealing with injection pump problems, it’s often best to consult a diesel specialist or authorized Kubota dealer for proper diagnosis and repair.
11. Regular maintenance and using clean fuel can help prevent issues with the pump.
12. If replacement is needed, ensure you get a compatible pump for your specific D722 engine model and serial number.
Some of the most common causes of failure for the Kubota D722 injection pump include:
1. Contaminated fuel – Dirty or poor quality fuel can cause debris buildup in the fuel system, affecting the injection pump performance.
2. Worn internal components – Springs, plungers, and other internal parts can wear out over time, especially with high hours of use.
3. Air in the fuel system – Air getting into the fuel lines or pump can disrupt proper fuel delivery.
4. Incorrect timing – Issues with pump timing can prevent proper fuel injection.
5. Clogged fuel filters – Restricted fuel flow due to clogged filters can strain the injection pump.
6. Low fuel pressure – Problems with the fuel supply system can lead to insufficient pressure at the injection pump.
7. Electrical issues – Faults with the electric shutoff solenoid or wiring can prevent proper pump operation.
8. Mechanical damage – Physical damage to the pump body or drive can cause failures.
9. Normal wear and tear – Over time, seals, gaskets and precision components simply wear out.
10. Water contamination – Water in the fuel can cause corrosion and damage to pump internals.
To prevent premature failure, proper maintenance is key – using clean fuel, changing filters regularly, and addressing any fuel system issues promptly. If injection pump problems are suspected, it’s often best to consult a diesel specialist for proper diagnosis and repair.
Kubota D722 Fuel Pump
Key points about the Kubota D722 fuel pump:
1. The D722 uses a Bosch MD mini fuel injection pump.
2. There are two main types of fuel pumps for the D722:
– Fuel injection pump (part of the high-pressure fuel system)
– Fuel lift pump (low-pressure pump that moves fuel from the tank)
3. Common part numbers for fuel pumps include:
– 1G642-52033 for the fuel injection pump
– 15821-52030 for the fuel lift pump
4. Prices vary widely:
– Fuel injection pumps can range from about $580 to over $1700
– Fuel lift pumps are generally less expensive, around $23-$150
5. When replacing, it’s important to get a pump compatible with your specific D722 engine model and serial number.
6. Reconditioned or exchange injection pumps are available as replacement options.
7. The fuel pump is a critical component for engine performance, so using quality parts is important.
8. For complex issues or replacements, it’s often recommended to consult a diesel specialist or authorized Kubota dealer.
9. Regular maintenance, including using clean fuel and changing filters, can help prevent fuel pump issues.
When looking to replace a fuel pump, it’s best to verify the exact part number needed for your specific engine configuration. Prices and availability can vary significantly between OEM and aftermarket options.
Kubota D722 Alternator
1. Specifications:
– Voltage: 12V
– Amperage: Varies, with options ranging from 40A to 75A
– Typically includes a pulley
– Often has an internal regulator
2. Compatibility:
– Alternators are available for various Kubota models, including the D722
– It’s important to verify compatibility with your specific engine serial number
3. Part numbers:
– Common OEM part numbers include 19260-64010, 19260-64011, 19260-64012, 19260-64013
– Aftermarket part numbers may differ
4. Replacement options:
– Both OEM and aftermarket options are available
– Reconditioned/remanufactured alternators are also an option
5. Price range:
– Prices vary widely, from around $95 to over $380 depending on the source and specifications
6. Installation:
– When replacing, ensure proper fitment and electrical connections
– Some alternators may replace lower amperage units (e.g., a 60A replacing a 55A)
7. Purchasing considerations:
– Check the amperage rating to ensure it meets your needs
– Verify physical dimensions and mounting points
– Consider warranty offerings
When looking for an alternator for your Kubota D722, it’s best to have your engine’s serial number and current alternator specifications on hand to ensure you get a compatible replacement.
Kubota D722 Rebuild Kit
1. Aftermarket rebuild kits are available for the Kubota D722 engine,
2. Using aftermarket rebuild kits may lead to mixed results. The user in the first result reported issues after rebuilding with a Friday Parts kit, including:
– Long startup time
– Excessive blow-by
– Lower compression than specified (310 psi vs 337-448 psi recommended)
3. When rebuilding, it’s important to ensure proper machining of components like cylinder liners. The user questioned if the machine shop may have over-bored the sleeves.
4. Quality of aftermarket parts can vary, potentially affecting engine performance after rebuild.
5. The Kubota D722 is a 3-cylinder, water-cooled diesel engine with 0.719L displacement.
6. When considering a rebuild, it’s important to verify compatibility with your specific engine serial number.
7. A full rebuild may involve replacing various components such as pistons, rings, bearings, gaskets, and potentially machining cylinder liners.
8. For best results, using OEM Kubota parts or high-quality aftermarket components is recommended.
9. If you’re not experienced with engine rebuilds, consulting a diesel specialist or authorized Kubota dealer may be advisable for complex repairs or full engine rebuilds.
10. Proper assembly and adherence to specifications are crucial for a successful rebuild and optimal engine performance.
Common issues when rebuilding a Kubota D722 engine include:
1. Proper machining of components: As mentioned in the first result, ensuring correct machining of parts like cylinder liners is crucial. Over-boring or improper machining can lead to issues.
2. Quality of rebuild parts: Using low-quality aftermarket parts can result in poor performance, as noted by the user who experienced issues after rebuilding with an aftermarket kit.
3. Correct assembly: As this is a precision engine, proper assembly techniques and torque specifications must be followed carefully.
4. Sealing issues: Installing seals correctly, especially tricky ones like the rear main seal, can be challenging for novice rebuilders.
5. Timing: Ensuring proper timing of the injection pump and valvetrain is critical for engine performance.
6. Compression: Achieving and maintaining the correct compression ratios in all cylinders is important.
7. Fuel system issues: Properly cleaning and reassembling the fuel system, including the injection pump, is crucial for proper engine operation.
8. Overheating: Ensuring proper cooling system function after rebuild, including correct thermostat operation and radiator efficiency.
9. Break-in procedures: Following correct break-in procedures after rebuild to ensure proper seating of rings and other components.
10. Electrical system integration: Properly reconnecting and testing all electrical components, including the alternator and starter.
To avoid these issues, it’s often recommended to use high-quality OEM parts, follow factory service manual procedures closely, and consider professional assistance for complex tasks if you’re not experienced with diesel engine rebuilds.
Kubota D722 Fuel Shut Off Solenoid
1. Specifications:
– Voltage: 12V
– Pull current: Around 30-46 amps
– Hold current: 0.7-1.1 amps
2. Common part numbers:
– SA-4899-12
– 1503ES-12A5UC5S
– 16851-60014
3. Function:
– Controls fuel flow to stop the engine when the key is turned off
– Older models (pre-2003): Rest position is retracted (fuel flows), extends to cut fuel when key turned off
– Newer models (post-2003): Rest position is extended (fuel blocked), retracts to allow fuel flow when key turned on
4. Installation:
– Typically mounts directly on the injection pump
– May have 2-3 wire connections
5. Replacement options:
– OEM and aftermarket options available
– Prices range from about $25 to $135 depending on brand and seller
6. Compatibility:
– Fits various Kubota engines including D722, Z482, D902
– Used on many Kubota tractors, mowers, and utility vehicles
7. Troubleshooting:
– A faulty solenoid can prevent the engine from starting or cause it to shut off unexpectedly
– Check for proper activation when key is turned on/off
When replacing, ensure you get the correct type for your specific engine model and year. Verify compatibility and proper electrical connections during installation.
Kubota D722 Head Gasket
Here are the key parts and information for replacing the head gasket on a Kubota D722 engine:
Cylinder Head Gasket
The main component needed is the cylinder head gasket. There are a few options available:
– Genuine Kubota cylinder head gasket (part number may vary based on engine serial number)
– Aftermarket compatible head gasket kits are also available
Prices for genuine Kubota head gaskets range from about $100-$115.
Additional Gaskets and Seals
When replacing the head gasket, it’s recommended to also replace:
– Valve cover gasket
– Inlet manifold gasket
– Exhaust manifold gasket
– Valve stem seals
Other Components
Some other parts to consider replacing during a head gasket job:
– Cylinder head bolts (should not be reused)
– O-ring for alignment pin (if applicable – not all D722 engines have this)
Complete Kits
Complete cylinder head gasket kits are available that include the head gasket and other associated gaskets/seals needed for the job. Prices for complete kits are around $1,200-$1,300[1].
Important Notes
– Most parts are specific to the engine serial number, so have that information available when ordering
– Proper cleaning of mating surfaces and correct torque procedures are critical for successful installation
– If experiencing overheating issues, other components like the thermostat and radiator may need inspection
Consulting the engine service manual for proper procedures and torque specifications is highly recommended when undertaking this repair.
Kubota D722 Air Filter
The Kubota D722 diesel engine uses a paper element air filter with the following key details:
Specifications
– Part number: 6C060-99414 (This replaces the older 6C060-99410 part number)
– Inside soft endcap diameter with hole: 1.68 inches
– Design: Paper element in a metal frame with soft endcaps
Importance
A clean air filter is crucial for optimal engine performance and longevity. Regular replacement according to the maintenance schedule or when dirty is essential.
Availability
The air filter for the Kubota D722 can be obtained from:
– Kubota dealers (OEM parts)
– Aftermarket suppliers offering compatible filters
Pricing
Prices for the D722 air filter element typically range from about $39 to $60, depending on the supplier and whether it’s an OEM or aftermarket part.
Additional Considerations
– Some Kubota D722 applications may use both an inner and outer air filter element
– The inner element, if required, is generally more expensive (around $58)
– When purchasing, have your engine’s serial number available, as some parts can be specific to certain production runs or applications
Regular maintenance of the air filter helps ensure clean air intake, protecting the engine from debris and contributing to efficient operation.
Installation
To properly install a new air filter on a Kubota D722 engine, follow these steps:
1. Open the engine compartment and locate the air filter housing.
2. Clean any debris around the air filter housing using compressed air or a shop vacuum to prevent contaminants from entering the engine.
3. Release the clips or fasteners holding the air filter housing cover in place.
4. Remove the old air filter element carefully to avoid dislodging any dirt into the air intake.
5. Inspect the air filter housing for any dirt or debris and clean if necessary.
6. Take the new air filter element and check that it’s the correct part number for your D722 engine (typically 6C060-99414).
7. Insert the new filter element into the housing, ensuring it’s properly seated and oriented correctly.
8. Replace the air filter housing cover, making sure it’s aligned properly.
9. Secure the cover by fastening all clips or latches.
10. Close the engine compartment.
Important notes:
– The D722 uses a dry paper element air filter. Never apply oil to this type of filter.
– Some D722 applications may have both an outer and inner (safety) filter element. If your engine has both, consider replacing the inner element as well, especially if it’s been a long time since the last replacement.
– Always refer to your engine’s manual for the exact procedure and maintenance schedule.
– Ensure the air intake system is free from obstructions before starting the engine.
Regular replacement of the air filter helps maintain engine performance and longevity by preventing dust and debris from entering the engine.
Kubota D722 Water Pump
The Kubota D722 engine utilizes a water pump as a critical component of its cooling system. Here are the key details about the water pump for this engine:
Specifications
– The water pump is designed specifically for the D722 engine model
– It circulates coolant through the engine block and radiator
Availability
Water pumps for the Kubota D722 are available as:
– Genuine OEM parts from Kubota
– Aftermarket compatible replacements
Pricing
Prices for D722 water pumps typically range from about $170 to $190 for OEM parts, with aftermarket options potentially available at lower price points.
Replacement Considerations
When replacing the water pump:
– It’s advisable to replace the water pump gasket as well
– The gasket is often sold separately and costs around $7-$10
– Some replacement pumps may come with a new gasket included
Installation Notes
– Proper installation is crucial to prevent leaks and ensure optimal performance
– Correct torque specifications should be followed when installing the new pump
– It’s a good opportunity to inspect other cooling system components like hoses and the thermostat
Importance
Regular inspection and timely replacement of the water pump are essential for:
– Maintaining proper engine temperature
– Preventing overheating issues
– Ensuring long-term engine reliability
When purchasing a water pump for a Kubota D722, it’s important to have the engine’s serial number available, as parts can sometimes be specific to certain production runs or applications.
Maintenance
To properly maintain the water pump on a Kubota D722 engine:
1. Regularly inspect the water pump for signs of leaks or damage. Look for coolant seepage around the pump housing or weep hole.
2. Check the pump drive belt tension and condition. Replace the belt if it shows signs of cracking, glazing, or excessive wear.
3. Ensure proper coolant levels are maintained in the radiator and overflow tank. Low coolant can lead to pump damage.
4. Use the correct coolant mixture as specified in the engine manual. Typically a 50/50 mix of antifreeze and distilled water is recommended.
5. Flush and replace the coolant according to the maintenance schedule, usually every 2 years or 2000 hours.
6. Listen for unusual noises coming from the pump area, which could indicate bearing failure.
7. Check for excessive play in the pump shaft by trying to wiggle the pulley.
8. Keep the cooling system clean and free of debris. Flush the radiator periodically.
9. If replacing the water pump, always use a new gasket and follow proper torque specifications when installing.
10. Consider replacing the thermostat when changing the water pump, as they often have similar service lives.
Regular maintenance of the water pump and overall cooling system will help ensure proper engine temperature regulation and prevent overheating issues. If you notice any problems with the water pump, address them promptly to avoid potential engine damage.
Kubota D722 Thermostat
The Kubota D722 engine uses a thermostat as part of its cooling system. Here are the key details about the thermostat for this engine:
Specifications
– Part number: 15531-73014 (ASSY THERMOSTAT)
– Opening temperature: Typically around 71°C (160°F)
Function
The thermostat regulates coolant flow, helping maintain optimal engine operating temperature by:
– Restricting coolant flow when the engine is cold
– Opening to allow full coolant circulation when the engine reaches operating temperature
Replacement
– Price: Approximately $33-$35 for a genuine Kubota thermostat
– Comes as an assembly, including the thermostat and housing
Installation Notes
– When replacing, use a new thermostat cover gasket (part number may vary)
– Apply a liquid gasket (such as Three Bond 1215 or equivalent) to the thermostat cover side of the gasket
– Proper installation is crucial for correct engine temperature regulation
Maintenance
– Regular inspection of the thermostat is recommended as part of routine engine maintenance
– A faulty thermostat can cause engine overheating or overcooling issues
When replacing the thermostat, it’s a good opportunity to inspect other cooling system components like hoses and the water pump. Always refer to the engine’s service manual for specific procedures and torque specifications during replacement.