Kubota d722 manual

G-2 2. G-3 3. G-4 4. G 5. The engine model and its serial number need to be identified before the engine can be serviced or parts replaced. It is marked after the engine model number. It indicates month and year of manufacture as follows. Millions discover their favorite reads on issuu every month. Give your content the digital home it deserves.

Get it to any device in seconds. Publish for free today. Go explore. The first section is always on how to safely operate the tractor, followed by detailed instructions as to how the tractor should be serviced.

This is an area where a Kubota parts manual PDF can coming extremely handy. It will give details about the warranty of the tractor, and how appropriate manufacturer parts need to be used in order for the warranty to be maintained.

The Kubota parts manual will go on to detail the instrument panel and controls, with detailed instructions as to what the various light switches and signals mean. Manual will detail for controls and hand controls and any accessories that may be on the tractor such as an electrical outlet or an accessory box. There will also be a section on suggested daily checks for the well-being of the tractor, which will include itemised information about any parts that may be needed.

There is likely to be a Kubota parts diagram section on how to start and stop the engine, including tricks on how to jump start the engine if problems occur. The parts manual PDF will also have very specific sections on the power takeoff operation, the three-point hitch and drawbar, the hydraulic unit and an auxiliary hydraulic control valve if equipped. These instructions are crucial for the safe operation of the tractor, and will detail how the various parts fit together, and how they can be best maintained.

Replacement parts of a Kubota tractor can either be bought from a manufacturer, or through dealership or through various websites online. Remove the socket head screws and nuts, and remove the injection pump 5. Move the fork lever 2 to the gear case side. Hook the start spring 6 to the injection pump control rack pin 5. Put the specific tool 7 through the fork lever hole of cylinder block 9 and hook the start spring 6.

Keep this spring slightly extended and install the injection pump 4. Make sure the control rod 8 should be pushed by the idling adjusting spring 1 and the pin 5 on the rod engages with the fork lever 2. Hook the start spring 6 to the bracket 3 using the specific tool 7.

Hook the governor springs small and large 14 to the governor lever 13 using the specific tool 7 and install the speed control plate Be sure to place the copper washers underneath two screws 12 in the upper of the speed control plate. Install the engine stop solenoid rod 15 to the guide hole of cylinder block 10 and fix the engine stop solenoid 16 with socket head screws. Otherwise it may get deformed permanently.

Make sure the start spring 6 is tight on the bracket 3. The sealant is applied to both sides of the soft metal gasket shim.

Fan Drive Pulley 1. Secure the flywheel to keep it from turning. Remove the fan drive pulley screw. Draw out the fan drive pulley with a puller. When reassembling Install the pulley to crankshaft, aligning the mark 1 on them.

Apply engine oil to the fan drive pulley retaining screw. And tighten it. Gear Case 1. Disconnect the start spring 2 from the fork lever 1 3. Remove the screw 1 of inside the gear case and outside screws. Remove the gear case 4. When reassembling Apply a liquid gasket Three Bond or equivalent to both sides of the gear case gasket.

Be sure to set three O-rings inside the gear case. Q NOTE The gear case for energize to run type stop solenoid and the gear case for one-side maintenance are available to meet customers requirements. Option 1 2 3 4. Idle Gear 1. Remove the external snap ring 3 , the collar 2 and the idle gear 1.

Remove the idle gear shaft mounting screws 4. Remove the idle gear shaft 5 if necessary. When reassembling Apply engine oil to the idle gear shaft mounting screw 4. And tighten them. Install the idle gear, aligning the mark 6 on the gears referring to the photo.

Camshaft 1. Remove the camshaft mounting screws 1 and draw out the camshaft with gear 2 on it. When reassembling When install the camshaft, apply engine oil to the camshaft journals. Apply engine oil to the camshaft mounting screws. Fuel Camshaft 1. Remove the retaining plate 6. Remove the fork lever holder mounting screws 8 , then draw out the injection pump gear 1 and fuel camshaft 7 with the governor fork assembly. When reassembling Hook the governor spring 5 to the fork lever 2 4 before installing the fork lever assembly to the crankcase.

Oil Pump and Crankshaft Gear 1. Remove the oil pump gear 7. Remove the oil pump mounting screw 6 and the oil pump 5. Remove the collar 4 , O-ring 3 and crankshaft oil slinger 2. Remove the crankshaft gear 1 with a puller. When reassembling Install the collar 4 after aligning the marks on the gears. See the photo at Idle Gear. Tightening torque 1 2 3 4. Remove the connecting rod caps 1 using a bihexagonal 8 mm socket. When reassembling Align the marks a with each other. Face the marks toward the injection pump.

Apply engine oil to the connecting rod screws and lightly screw it in by hand, then tighten it to the specified torque. If the connecting rod screw wont be screwed in smoothly, clean the threads. If the connecting rod screw is still hard to screw in, replace it. Piston 1. Turn the flywheel and bring the piston to top dead center. Draw out the piston upward by lightly tapping it from the bottom of the crankcase with the grip of a hammer.

Draw out the other pistons after the same method as above. When reassembling Before inserting the piston into the cylinder, apply enough engine oil to the cylinder. When inserting the piston into the cylinder, face the mark on the connecting rod to the injection pump. Make sure of the position of each piston by marking. For example, mark 1 on the No. When installing the piston into the cylinder, place the gaps of all of the piston rings as shown in the figure.

Carefully insert the piston using a piston ring compressor 1. Otherwise, their chrome-plated section may be scratched, causing trouble inside the cylinder. Piston Ring and Connecting Rod 1.

Remove the piston rings using a piston ring tool. Remove the piston pin 7 , and separate the connecting rod 6 from the piston 5. When reassembling When installing the ring, assemble the rings so that the manufacturers mark 12 near the gap faces the top of the piston.

When installing the oil ring onto the piston, place the expander joint 10 on the opposite side of the oil ring gap Apply engine oil to the piston pin. When installing the connecting rod to the piston, immerse the piston in 80 C F oil for 10 to 15 minutes and insert the piston pin to the piston.

When installing the connecting rod to the piston, align the mark 9 on the connecting rod to the fan-shaped concave 8. Secure the flywheel to keep it from turning using a flywheel stopper. Remove all flywheel screws 1 and then remove the flywheel 2. When reassembling Set the No. Align the 1TC mark a on the outer surface of the flywheel horizontally with the alignment mark b on the rear end plate. Apply engine oil to the threads and the undercut surface of the flywheel screw and fit the screw.

Bearing Case Cover 1. Remove the bearing case cover mounting screws. First, remove inside screws 1 and then outside screws 2. Remove the bearing case cover 5. When reassembling Fit the bearing case gasket 3 and the bearing case cover gasket 4 with correct directions.

Install the bearing case cover 5 to position the casting mark UP a on it upward. Apply engine oil to the oil seal 6 lip and take care that it is not rolled when installing.

Tighten the bearing case cover mounting screws with even force on the diagonal line. Remove the main bearing case screw 2 1. Draw out all the crankshaft. For ZE3B 1. Turn the crankshaft to set the crankpin of the cylinder to the horizontal directions right or left.

Then draw out all the crankshaft, holding the crankpins to the horizontal directions. Turn the crankshaft to set the crankpin of the third cylinder to the bottom dead center. Then draw out the crankshaft until the crankpin of the second cylinder comes to the center of the third cylinder. Turn the crankshaft by 2. Draw out the crankshaft until the crankpin of the first cylinder comes to the center of the third cylinder.

Repeat the above steps to draw out all the crankshaft. When reassembling Clean the oil passage of the crankshaft with compressed air. Install the crankshaft assembly, aligning the screw hole of main bearing case screw 2 with the screw hole of crankcase. When tightening the main bearing case 2, apply oil to the main bearing case screw 2 1 and screw by hand before tightening the specific torque.

If not smooth to screw by hand, align the screw holes between the crankcase and the main bearing case. Remove the two main bearing case screws 1 4 , and remove the main bearing case assembly 1 1 , being careful with crankshaft bearing 3 5.

Remove the main bearing case assembly 2 2 and the main bearing case assembly 3 as above. Keep in mind, however, that the thrust bearing 7 is installed in the main bearing case assembly 3. When reassembling Clean the oil passage in the main bearing cases. Apply clean engine oil to the bearings. Install the main bearing case assemblies in original positions. Refer to the figure. Match the alignment numbers a on the main bearing case assembly 1 1. Do the same for the main bearing case assembly 2 2 and the main bearing case assembly 3 too.

Install the thrust bearing 7 with its oil groove facing outward. Confirm that the main bearing case moves smoothly after tightening the main bearing case screw 1 to the specified torque.

Tightening torque 1 2 3 4 5 6 7. Remove the two main bearing case screws 1 4 , and remove the main bearing case assembly 1 1 , being careful with crankshaft bearing 3 5 9.

Keep in mind, however, that the thrust bearing 8 is installed in the main bearing case assembly 3. Since diameters of main bearing cases vary, install them in order of marking b 1 for ZE3B and 1, 2 for DE3B from the gear case side. Be careful not to confuse the top and bottom of the crankshaft bearing 3 5 9. Install the bearing with the oil groove c up. Install the thrust bearing 8 with its oil groove facing outward. Tightening torque 1 2 3 4 5 6 7 8 9.

Unscrew the C terminal nut 7 , and disconnect the connecting lead Unscrew the solenoid switch mounting nuts 1 , and remove the solenoid switch 5. Remove the end frame cap Remove the brake shoe 16 , brake spring 15 and gasket Unscrew the through bolts 22 , and remove the rear end frame Remove the brush from the brush holder while holding the spring up.

Remove the brush holder Draw out the yoke 19 from the starter drive housing 2. Draw out the armature 10 with the drive lever 3. Unscrew the C terminal nut 5 , and disconnect the connecting lead 9. Unscrew the magnetic switch mounting nuts 1 , and remove the magnetic switch 3 from the housing 2. Unscrew the through bolts 15 and mounting screw 10 , and remove the rear end frame Draw out the armature 11 and yoke 12 from the housing.

Draw out the shaft assembly 7 with the drive lever 6 and overrunning clutch 8 from the housing. When reassembling Tightening torque. Remove the nut and separate the plate 7. Tap out the shaft 1 from the rotor 3. Unscrew the screws and remove the stator 6. When reassembling Take care the direction of the collar 4 , the flat side should face to the pulley side Tightening torque.

Remove the pulley 1. Remove the rear end cover Remove the IC regulator Remove the four screws holding the stator lead wires. Remove the rectifier 9. Remove the rear end frame 8. Press out the rotor 6 from drive end frame 2. Remove the retainer plate 5. Press out the bearing 4 from drive end frame 2 with a press and jig. Lightly secure the rotor with a vise to prevent damage, and remove the bearing 7 with a puller.

Remove the cylinder head. With the piston at TDC, use grease to affix three or four plastigauges of a diameter 1. Take the piston to an intermediate position, install the cylinder head and tighten the head bolts to the specified torque.

Turn the crankshaft so the piston goes through TDC. Remove the cylinder head and measure the thickness of the plastigauges. If they are out of spec, check the oil clearance of the crank pin journal and piston pins.

Top clearance. Cylinder Head Surface Flatness 1. Clean the cylinder head surface. Place a straightedge on the cylinder heads four sides and two diagonal as shown in the figure.

Measure the clearance with a thickness gauge. If the measurement exceeds the allowable limit, correct it with a surface grinder. Be sure to check the valve recessing after correcting. Cylinder head surface flatness. Cylinder Head Flaw 1. Prepare an air spray red check. Clean the surface of the cylinder head with detergent 2. Spray the cylinder head surface with the red permeative liquid 1. Leave it five to ten minutes after spraying.

Wash away the read permeative liquid on the cylinder head surface with the detergent 2. Spray the cylinder head surface with white developer 3. If flawed, it can be identified as red marks. Valve Recessing 1. Clean the cylinder head surface, valve face and valve seat. Insert the valve into the valve guide. Measure the valve recessing with a depth gauge. If the measurement exceeds the allowable limit, replace the valve.

If it still exceeds the allowable limit after replacing the valve, replace the cylinder head. Clearance between Valve Stem and Valve Guide 1. Remove carbon from the valve guide section. Measure the valve stem O. Measure the valve guide I. If the clearance exceeds the allowable limit, replace the valves. If it still exceeds the allowable limit, replace the valve guide. Clearance between valve stem and valve guide.

Replacing Valve Guide When removing 1. Press out the used valve guide using a valve guide replacing tool. When installing 1. Clean a new valve guide and valve guide bore, and apply engine oil to them. Press in a new valve guide using a valve guide replacing tool. Ream precisely the I. Valve guide I. Intake and exhaust. A When Removing. Valve Seating 1. Coat the valve face lightly with prussian blue and put the valve on its seat to check the contact.

If the valve contact does not comply with the reference value, replace the valve or correct the contact of valve seating. Valve seat width 1 Correct 2 Incorrect. After correcting the valve seat, be sure to check the valve recessing.

Correct the valve with a valve refacer. Valve face angle. Slightly correct the seat surface with a 0. Fitting the valve, check the contact position of the valve face and seat surface with prussian blue.

Visual check [If the valve has been used for a long period, the seat tends to come in contact with the upper side of the valve face. Grind the upper surface of the seat with a 0. Grind the seat with a 0. Repeat steps 3 and 4 until the correct contact is achieved. Valve seat angle 1 2 A B C D. Valve Lapping 1. Apply compound evenly to the valve lapping surface. Lap the valve onto its seat with a valve flapper or screwdriver. After lapping the valve, wash the compound away and apply oil, then repeat valve lapping with oil.

Apply prussian blue to the contact surface to check the seated rate. Free Length and Tilt of Valve Spring 1. Measure the free length B of valve spring with vernier calipers. If the measurement is less than the allowable limit, replace it. Put the valve spring on a surface plate, place a square on the side of the valve spring.

Check to see if the entire side is in contact with the square. Rotate the valve spring and measure the maximum tilt A. If the measurement exceeds the allowable limit, replace it. Check the entire surface of the valve spring for scratches. If there is any defect, replace it. Tilt A. Valve Spring Setting Load 1.

Place the valve spring on a tester and compress it to the same length it is actually compressed the engine. Read the compression load on the gauge.

Measure the rocker arm shaft O. Measure the rocker arm I. If the oil clearance exceeds the allowable limit, replace the rocker arm and measure the oil clearance again. If it still exceeds the allowable limit, replace also the rocker arm shaft.

Oil clearance between rocker arm and rocker arm shaft. Push Rod Alignment 1. Place the push rod on V blocks. Measure the push rod alignment. If the measurement exceeds the allowable limit, replace the push rod. Push rod alignment. Measure the tappet O.

Measure the I. If the oil clearance exceeds the allowable limit or the tappet is damaged, replace the tappet. Oil clearance between tappet and tappet guide bore.

Set a dial indicator lever type with its tip on the gear tooth. Move the gear to measure the backlash, holding its mating gear. If the backlash exceeds the allowable limit, check the oil clearance of the shaft and the gear. If the oil clearance is proper, replace the gear. Idle Gear Side Clearance 1. Set a dial indicator with its tip on the idle gear. Measure the side clearance by moving the idle gear to the front and rear.

If the measurement exceeds the allowable limit, replace the idle gear collar. Camshaft Side Clearance 1. Set a dial indicator with its tip on the camshaft. Measure the side clearance by moving the cam gear to the font and rear. If the measurement exceeds the allowable limit, replace the camshaft stopper. Camshaft side clearance. Camshaft Alignment 1. Support the camshaft with V blocks on the surface plate at both end journals. Set a dial indicator with its tip on the intermediate journal.

Measure the camshaft alignment. If the measurement exceeds the allowable limit, replace the camshaft. Camshaft alignment. Cam Height 1. Measure the height of the cam at its highest point with an outside micrometer. If the measurement is less than the allowable limit, replace the camshaft. Cam height of intake and exhaust. Oil Clearance of Camshaft Journal 1. Measure the camshaft journal O. Measure the cylinder block bore I.

If the oil clearance exceeds the allowable limit, replace the camshaft. Measure the idle gear shaft O. Measure the idle gear bushing I. If the oil clearance exceeds the allowable limit, replace the bushing. If it still exceeds the allowable limit, replace the idle gear shaft. Oil clearance between idle gear shaft and idle gear bushing. Replacing Idle Gear Bushing When removing 1. Press out the used idle gear bushing using an idle gear bushing replacing tool.

Clean a new idle gear bushing and idle gear bore, and apply engine oil to them. Press in a new brushing using an idle gear bushing replacing tool, until it is flush with the end of the idle gear. Measure the piston pin bore I. If the measurement exceeds the allowable limit, replace the piston.

Measure the piston pin O. Measure the small end bushing I. If it still exceeds the allowable limit, replace the piston pin. Oil clearance between piston pin and small end bushing. Replacing Small End Bushing When removing 1. Press out the used bushing using a small end bushing replacing tool. Clean a new small end bushing and small end hole, and apply engine oil to them. Using a small end bushing replacing tool, press in a new bushing service parts taking due care to see that the position of the connecting rod oil hole matches the bushing hole.

Spare parts. Install the piston pin into the connecting rod. Install the connecting rod on the connecting rod alignment tool. Put a gauge over the piston pin, and move it against the face plate. If the gauge does not fit squarely against the face plate, measure the space between the pin of the gauge and the face plate. If the measurement exceeds the allowable limit, replace the connecting rod. Connecting rod alignment. Piston Ring Gap 1.

Insert the piston ring into the lower part of the cylinder the least worn out part with a piston ring compressor and piston. Measure the ring gap with a feeler gauge. If the measurement exceeds the allowable limit, replace the piston ring. Top ring. Clean the rings and the ring grooves, and install each ring in its groove. Measure the clearance between the ring and the groove with a feeler gauge. If the clearance exceeds the allowable limit, replace the piston ring.

If the clearance still exceeds the allowable limit after replacing the ring, replace the piston. Second ring Clearance between piston ring and piston ring groove Oil ring. Set a dial indicator with its tip on the end of the crankshaft. Measure the side clearance by moving the crankshaft to the front and rear.

If the measurement exceeds the allowable limit, replace the thrust bearings. If the same size bearing is useless because of the crankshaft journal wear, replace it with an oversize one referring to the table and figure. Crankshaft side clearance. Crankshaft Alignment 1. Support the crankshaft with V blocks on the surface plate at both end journals.

Measure the crankshaft alignment. If the measurement exceeds the allowable limit, replace the crankshaft. Crankshaft alignment. Oil Clearance between Crankpin and Crankpin Bearing 1. Clean the crankpin and crankpin bearing. Put a strip of plastigage on the center of the crankpin. Install the connecting rod cap and tighten the connecting rod screws to the specified torque, and remove the cap again.

Measure the amount of the flattening with the scale, and get the oil clearance. If the oil clearance exceeds the allowable limit, replace the crankpin bearing. If the same size bearing is useless because of the crankpin wear, replace it with an undersize one referring to the table and figure. Be sure not to move the crankshaft while the connecting rod screws are tightened.

Oil clearance between crankpin and crankpin bearing. Measure the O. If the oil clearance exceeds the allowable limit, replace the crankshaft bearing 1. If the same size bearing is useless because of the crankshaft journal wear, replace it with an undersize one referring to the table and the figure. Oil Clearance between crankshaft journal and crankshaft bearing 1. Replacing Crankshaft Bearing 1 When removing 1. Press out the used crankshaft bearing 1 using a crankshaft bearing 1 replacing tool.

Clean a new crankshaft bearing 1 and crankshaft journal bore, and apply engine oil to them. Using a crankshaft bearing 1 replacing tool, press in a new bearing 1 2 so that its seam 1 directs toward the exhaust manifold side. See figure. Dimension A 1 2 3 A B.