________________________________________________________________________________

Kubota B6000, B7000, B7001 - Transmission

Kubota B6000, B7000, B7001 Tractor - Clutch Adjustments

Adjustment of clutch pedal

1 - Bearing, 2 - Oil Sea, 3 - Clutch Disc Assy, 4 - Thrust Ball Bearing, 5 - Bearing Holder, 6 - Brake Pedal Shaft, 7 - Clutch Release Fork, 8 - Propeller Shaft, 9 - Brake Rod, 10 - Step, 11 - Pressure Plate, 12 - Ring, 13 - Clutch Rod, 14 - Spring, 15 - Flange, 16 - Rubber, 17 - Pin Flange, 18 - U-Joint, 19 - Differential Lock Lever, 20 - Brake RH Pedal, 21 - Brake LH Pedal, 22 - Rod, 23 - Collar, 24 - Differential Lock Pedal, 25 - Spring, 26 - Differential Lock Pedal Shaft, 27 - Clutch Pedal, 28 - Differential Lock Rod

Adjustment of clutch pedal play

The play of the clutch pedal is governed by the clearance between the release lever and the ball bearing. The clearance has been set to 0 098 to 0.12 in (2.5 to 3 mm) before the tractor left the factory. However, me clearance changes as the tractor is used. The general tendency is for the play to increase at the beginning but will decrease with use. if the clutch pedal were to be used with no play, it would cause troubles. Be sure to make checks at time of routine checks and maintenance, and if necessary, make the necessary adjustment.

Precaution in operating clutch

Clutch should serve to transmit power without loss and furthermore should engage or disengage accurately whenever so required. For this reason, operation and maintenance services should be performed very carefully. The clutch pedal should be depressed speedily to disengage the clutch arid returned slowly to reengage it. Retrain by all means from leaving the foot on the pedal while operating the tractor or from traveling with clutch half engaged. Kubota B6000, B7000, B7001 tractor should not be jerked with a load more than the specified not be used for long period with overload, because otherwise the life of the clutch will be shortened or various troubles may likely be caused, in case of long storage, keep the clutch disengaged by using a piece of wood to lock the pedal. Engine starting is only possible when the clutch is disengaged.

Kubota B6000, B7000, B7001 Tractor - Transmission Assembly

Kubota B6000, B7000, B7001 Transmission Parts: 1 - Oil Filter, 2 - Pipe, 3 - Plug, 4 - Oil Gauge, 5 - Cap, 6 - Change Lever, 7 - Spring, 8 - Cover, 9 - Ball Bearing, 10 - 13T-28T Gear, 11 - Ball Bearing, 12 - 20T-25T Gear, 13 - 29T Gear, 14 - 4th Shaft, 15 - Needle Bearing, 16 - Ball Bearing, 17 - 1st Shaft, 18 - Ball Bearing, 19 - Oil Seal, 20 - 1st Shaft Cover, 21 - Ball Bearing, 22 - Collar, 23 - Collar, 24 - 2nd Shaft, 25 - 14T Gear, 26 - 18T Gear, 27 - 23T Gear, 28 - 30T Gear, 29 - 3rd Shaft, 30 - Oil Seal, 31 - Ball Bearing, 32 - Collar, 33 - Thrust Collar, 34 - Bush, 35 - 29T Gear, 36 - 20T-25T Gear, 37 - Ball Bearing, 38 - Spiral Bevel Gear Pinion, 39 - Ball Bearing, 40 - Ball Bearing, 41 - 15T Gear, 42 - Collar, 43 - 30T Gear, 44 - Ball Bearing, 45 - Bush, 46 - Collar, 47 - Ball Bearing, 48 - Differential Gear Case, 49 - 5th Shaft Cover, 50 - Ball Bearing, 51 - Oil Seal, 52 - 5th Shaft, 53 - Plate, 54 - O-Ring, 55 - Oil Pressure Piston, 56 - Oil Pressure Piston Rod, 57 - Arm Pin, 58 - Lock Washer, 59 - Oil Pressure Arm, 60 - Oil Pressure Arm Shaft, 61 - Case Rear Cover, 62 - Washer, 63 - Breather, 64 - Collar, 65 - Seat Rear Support, 66 - Seat, 67 - Seat Cover, 68 - Cushion, 69 - Seat Front Support, 70 - O-Ring, 71 - Cylinder Cap, 72 - Lever Grip, 73 - Case Front Cover, 74 - Front Axle Drive Shaft, 75 - Oil Seal, 76 - Ball Bearing, 77 - Reverse Shaft, 78 - 1st Shaft Collar, 79 - Bush, 80 - 22T Gear, 81 - 28T Gear, 82 - Bush, 83 - Transmission Case, 84 - Ball Bearing, 85 - 1st Shaft Collar, 86 - 25T Gear, 87 - Front Wheel Drive Clutch

Kubota B6000, B7000, B7001 - Transmission case disassembly

Drain out the oil from the right and left bottom of the differential gear case and bottom of the transmission case. Remove front and rear case cover. Remove left and right axle case, and draw out differential gear shaft, differential gear lock fork and axle. Pull out 5th shaft. Unscrew the bolts connecting transmission case and differential gear case and divide the cases. Remove 28T gear, shift fork, and shift fork rod. Pull out spiral bevel gear pinion. Pull out 25T gear on rear end of back shaft and the ratchet clutch. Remove the auxiliary speed change shift fork. Remove the 1st shaft cover and pull out the 1st shaft. Needle bearing and collar are in the 1st shaft so be careful that they do not drop out. Remove the 4th shaft to the back. Pull out the reverse shaft. Pull out the 2nd shaft to the front. Pull out the 3rd shaft to the back. Pull out the rotary speed change shift fork.

Kubota B6000, B7000, B7001 - Transmission case assembly

Assemble the rotary speed change lever, auxiliary speed change lever and front axle drive clutch lever. Assemble the 3rd shaft (The front and back thrust collar for the 29T gear should be assembled so that the side with notches faces the gear side). Assemble the rotary speed change shift fork and the shift rod. The shift rod should be assembled with the O-ring groove in the front side. Push in from the front, being very careful net to drop the balls. Assemble the 2nd shaft. Assemble the reverse shaft. The front and back collar for the 25T gear at the rear part of the reverse shaft should be assembled so that the side with the notches face the gear side. The 22T gear should be assembled with the chamber part in the front. Assemble the 4th shaft.

Assemble the 1st shaft and 1st shaft cover. Knock in the 6202 bearing of the 2nd shaft and 4th shaft. Assemble the auxiliary speed change shift fork and shift fork shaft. The shift fork shaft is symmetrical so there is no right or left side to the shaft. Assemble the spiral level gear pinion. Assemble with the gear and bearing in the assembled condition. Assemble the 28T gear, shift fork and shift rod. Assemble at the front and of the shift rod of the 28T gear which is engaged with the 5th shaft, and engage on the spline of the 3rd shaft. Assemble the differential in the differential case. In ordinary cases 1 shim each is inserted on the outer side of the right and left bearing of the differential assembly. Assemble the differential gear case to the transmission case. Check the engagement of the differential bevel gear and the backlash. The backlash should be 0.13-0.25 mm. Assemble the 5th shaft. Insert from the rear end of the differential gear case, turn and engage to the spline of the 28T gear Put on the cover.

Assemble the axle and the differential gear. First put in the axle and then put in the differential gear shafts. At the same time, put on the differential lock fork and the fork rod on the right side. Assemble the axle cover and lower link bracket. Operate the differential lock to check whether it operates correctly. Assemble the front and rear case covers. At the time of assembling the front case cover, put the main speed change gear to neutral, and check to make sure that the fork of the main speed change shift rests in the fork groove of the gear and works correctly.

Also be sure that the auxiliary speed change lever is positioned correctly on the auxiliary speed charge fork groove. After tightening the cover bolts, check to see whether the main speed change lever and auxiliary speed charge lever works property. When the hydraulic arm has been disassembled, be sure to align the assembly mark of the hydraulic arm shaft and the hydraulic arm at the time of assembly. When assembling the lift arm, be sure to align correctly. Do not remove check rod and operate the hydraulic arm. The hydraulic arm will hit the rear part of the differential gear case and might damage the case.

Kubota B6000, B7000, B7001 - Adjustment of spiral bevel pinion and gear

Adjustment of the spiral bevel pinion and gear is effected by shims used on the differential bearing cases. At the time of disassembly, be attentive to the shims used there and be careful not to lose them. In assembling, return the unassembled shims to their original places, and then check meshing and backlash of the gear teeth. If both are correct, proceed with assembly. However, if a tractor has been put to a long period of service, it generally requires an adjustment in this unit, which should be made in the following order. Adjustment in clearance of differential complete, to differential bearing cases.

Since the differential is supported on the right and left by ball bearings, and improper adjustment in shims used on the bearing cases will result in a differential which is too tight to turn smoothly or which rattles to right and left not allowing the pinion and gear to mesh properly. For correcting such troubles, gradually decrease in the former case and increase in the latter case the number of shims on bearing cases until the differential complete turn lightly. For easier adjustment, it is recommended that me spiral bevel pinion shaft be removed from the assembly during the service. After the above shim adjustment, attend to the following adjustment.

Adjustment in backlash and meshing of spiral bevel pinion and gear. This adjustment is very important. Whether this has been performed correctly or not seriously affects the life of the gears and consequently the durability of the tractor. Therefore, make the adjustment with close care. Simple ways of judging the results of adjustment are: Backlash - Fill and impress solder between teeth meshed and measure the thickness of impressed solder with a micrometer. If the measurement is 0.1 to 0.2 mm), the adjustment is correct. Contact of teeth - Apply a very thin coat of rod thinned with oil to contact surfaces of several teeth of the pinion. Mesh and turn the pinion with the gear lightly.

KUBOTA TRACTORS TROUBLESHOOTING
L235	L2501	L2550	L275	L3110
L3301	L35	L3710	L3901	L4310
L5030	M4700	M5700	M6040	M6800
M8200	M8540	M9000	MX5100	MX5200