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Kubota B2150, B9200 - Hydrostatic Transmission
Kubota B2150, B9200 HST Transmission -
Checking And Adjusting
Maximum Forward Speed
Depress the speed control pedal all the way in the forward direction,
and measure the tractor speed. If the measurement is not within factory
specifications, loosen the lock nut and adjust with the bolt. Maximum
forward speed about 19 km/h 11.5 mph (Tire 8.3-24).
Maximum Reverse Speed
Depress the speed control pedal all the way in the reverse direction,
and measure the tractor speed. If the measurement is not within the
factory specifications, loosen the lock nut and adjust with the bolt.
Maximum reverse speed about 15.2 km/h 9.5 mph (Tire 8.3-24).
Safety Switch Setting Position
Measure the distance between the clutch rod plate and the tip of the
safety switch. If the measurement is not within the factory
specifications, adjust it with the mounting nut. Distance between tip of
safety switch and clutch rod plate - 10 to 12 mm 0.39 to 0.47 in.
Adjusting Neutral
Rotate the neutral adjuster counterclockwise so the rear wheels turn
forward. Then rotate it clockwise until wheels stop completely. Put a
mark on the clutch housing aligning the groove on neutral adjuster.
Rotate the neutral adjuster clockwise so the rear wheels turn reverse.
Then rotate it counterclockwise until wheels stop completely. Put a mark
on the clutch housing aligning the groove on neutral adjuster. Hold the
neutral adjuster so its groove is at the middle of the marks and tighten
the screw. When the wheels tend to turn forward, rotate neutral adjuster
clockwise. When the wheels tend to turn reverse, rotate neutral adjuster
counterclockwise.
High Relief Pressure and Charge Relief Pressure
1 - HN tube, 2 - High pressure gauge, 3 - Low pressure gauge, 4 -
Connector 3, 5 - Adaptor 1, 6 - Adaptor 3, 7 - Adaptor 2, 8 - Collar, 9
- Collar
Remove the joint screw LH and seal washer from the A port. Attach
adaptor 3 (6) with collar (8) and seal washer to the A port. Remove the
joint screw RH and seal washer from the B port. Attach adaptor 2 (7)
with the collar (9) and seal washer to the B port. Attach the HN tube
(1) and connector 3 (4) on adaptor 2 (7) and then a high pressure gauge
(2) on the HN tube. Attach the HN tube (1) and connector 3 (4) on
adaptor 3 (6) and then a low pressure gauge (3) on the HN tube. Fully
engage parking brakes. Change the range selector lever to the Low
position. Start the engine and run it at the maximum speed. Read the low
pressure gauge (3) (right side) to measure the charge relief pressure.
Then depress the speed control pedal forward and read the high pressure
gauge (2) (left side) to measure the forward high relief pressure. Stop
the engine and interchange the high pressure gauge (2) with the low
pressure gauge (3). Start the engine and run it at the maximum speed.
Depress rear of the speed control pedal and read the high pressure gauge
(2) (right side) to measure the reverse high relief pressure. If the
measurement is not within the factory specifications, replace the valve.
Charge relief valve operating pressure - 490 to 686 kPa (71 to 99 psi).
Kubota B2150, B9200 HST Transmission -
Disassembly And Reassembly
Neutral Holder
1 - Screw , 2 - Neutral Holder, 3 - Neutral Adjuster, 4 - Spring Holder,
5 - Neutral Holder Arm
Place parting marks on the neutral adjuster (3) and the neutral holder
arm (5). Remove the screws and spring holder (4). Remove the screw, and
neutral holder arm (5). Remove the screw (1) and pull out the neutral
holder (2). Align the parting marks and install the neutral adjuster and
the neutral holder arm.
Port Block
Remove the port block mounting screws, and tap the front of port block
flange with a soft hammer to separate. Cover the splines of each shaft
with thin tape to protect sealing lip. Install port block with gasket,
О-ring and valve plate in place. Valve plates may stick to the port
block but they are not fixed. Take care not to drop them.
Motor Cylinder Block
Hold the output shaft and tap the rear of case flange with a soft hammer
slightly to separate motor cylinder block assembly. Remove internal snap
ring retaining retainer plate of motor. Slide out motor cylinder block
with pistons, retainer plate and internal snap ring. Check that internal
snap ring faces correct direction, and install it to motor swashplate.
Aligning the hole on swashplate to the dowel pin in the case, install
output shaft assembly in the case.
Pump Cylinder Block
1 - Pump Cylinder Block, 2 - Retainer Plate, 3 - Piston, 4 - Internal
Snap Ring
Remove internal snap ring (4) retaining the retainer plate (2) of pump.
Slide out pump cylinder block (1) with pistons (3) retainer plate (2)
and internal snap ring (4). Draw out the thrust plate from the variable
swashplate. Check that internal snap ring (4) faces correct direction,
and install it to pump swashplate. Squeeze the snap ring (4) and slip
into the groove its arc first by pushing down with a screwdriver to fit
surely.
Input Shaft
Remove the internal snap ring. Strike the end of the oil seal at three
positions using a screwdriver, break it open at one place, and pry it
off with the screwdriver. Tap out the input shaft.
Kubota B2150, B9200 Tractor - Hydrostatic Transmission
Servicing
Input Shaft
Pull out the input shaft from the case. Check the seal surface, the
bearing surface and the bearing. If the shaft is rough or grooved,
replace. If the bearing is worn, replace.
Cylinder Block Bore and Pistons
Lift all the pistons gently with the retainer plate. Check the pistons
for their free movement in the cylinder block bores. If the piston or
the cylinder block bore is scored, replace cylinder block assembly. Do
not interchange pistons between pump and motor cylinder block. Pistons
and cylinder blocks are matched. Clearance between piston and bore -
0.02 mm (0.0008 in). Allowable limit - 0.04 mm (0.0016 in).
Piston Slipper and Retainer Plate
Check the slipper for flatness. If rounded, replace. Measure the
thickness of piston slipper. If the measurement is less than the
allowable limit, replace. Check the lubricant hole for clogging. Do not
interchange pistons between pump and motor cylinder block. Pistons and
cylinder blocks are matched. Thickness of slipper - 3.00 mm (0.118 in).
Allowable limit - 2.90 mm (0.114 in).
Kubota B2150, B9200 HST - Transmission Case
Front Cover and Front Case Cover
Remove the range selector guide. Remove the front case cover. Remove the
coupling. Remove the front cover.
1st Shaft and 2nd Shaft
1 - 2nd Shaft, 2 - 1st Shaft, 3 - 16T Gear, 4 - Bearing, 5 - Bearing, 6
- Bearing, 7 - 16T Gear, 8 - Bearing, 9 - Shim
Draw out the 2nd shaft (1), 16T gear (3), and bearing (4), (5) as a
unit. Draw out the 1st shaft (2), bearing (6), 16T gear (7), bearing (8)
and shim (9) as a unit. Install the 16T gear (3) so that its boss faces
the bearing (4). Install the 16T gear (7) so that its boss faces the
bearing (8).
6th Shaft
1 - External Snap Ring, 2 - 20T Gear, 3 - Shift Fork and Fork Rod, 4 -
Bearing, 5 - Collar, 6 - Needle Bearing, 7 - Collar, 8 - 27T Gear, 9 -
Collar, 10 - 24T Gear, 11 - 6th Shaft, 12 - Bearing
Remove the external snap ring(1), and draw out the 20T gear(2). Draw out
the 6th shaft (11), bearing (4), collar (5), needle bearing (6), collar
(7), 27T gear (8), collar (9), 24T gear (10) and bearing (12) as a unit
with the shift fork and fork rod (3). Install the collars (5), (9) so
that their oil grooves face the needle bearing.
Mid-PTO
Separate the mid-PTO case from the transmission case. After tapping the
spring pin into the shaft, remove the shaft and the 27T gear. Remove the
oil seal and the external snap ring. Draw out the 16T gear shaft with
the bearing on it.
Kubota B2150, B9200 Hydrostatic Transmission -
Differential Gear Case
Front Drive Shaft (4WD type only)
1 - Coupling, 2 - 16T Gear, 3 - 23T Gear, 4 - 3rd Shaft, 5 - External
Snap Ring, 6 - Spiral Bevel Pinion Shaft, 7 - Bearing, 8 - External Snap
Ring, 9 - 7th Shaft Front, 10 - Front Drive Shaft
Draw out the coupling (1) from the 3rd shaft (4). Draw out the front
drive shaft (10) (4WD type only). Remove the external snap ring (8), and
pull out the bearing (7). Draw out the 23T gear (3) from the front 7th
shaft (9). Remove the external snap ring (5), and draw out the 16T gear
(2) from the spiral bevel pinion shaft (6).
Bearing Support
Remove the bearing support mounting screws and nuts, and remove the
bearing support with the shift fork. Bearing support mounting screw and
nut - 16.7 to 19.6 Nm (12.3 to 14.5 ft-lbs).
3rd Shaft, 4th Shaft and Spiral Bevel Pinion Shaft
1 - Ball Bearing, 2 - Spiral Bevel Pinion Shaft, 3 - Shaft, 4 - 3rd
Shaft, 5 - 4th Shaft, 6 - 29-16T Gear, 7 - Thrust Collar, 8 - Thrust
Collar, 9 - Thrust Collar, 10 - Thrust Collar, 11 - Ball Bearing, 12 -
21T Gear, 13 - 24T Gear, 14 - 27T Gear, 15 - Ball Bearing
Pull out the bearing (1) from the spiral bevel pinion shaft (2). Draw
out the 3rd shaft (4), 4th shaft (5) and 29-16T gear (6) with shift fork
and shaft (3). Install the thrust collars (7), (8), (9), (10) to the 3rd
shaft (4) so that their oil grooves face the needle bearing. Install the
4th shaft (5) so that the 27T gear (14) boss faces the bearing (15), the
24T gear (13) boss faces the bearing (15), and the 21T gear (12) boss
faces the bearing (11).
PTO Shaft and 7th Shaft Rear
Remove the rear cover mounting screw. Remove the PTO shaft with rear
cover. Draw out the 7th shaft rear from the differential gear case.
7th Shaft
1 - 7th Shaft Front, 2 - 27T Gear, 3 - Collar, 4 - Bearing, 5 -
Coupling, 6 - 7th Shaft Middle, 7 - Coupling, 8 - 7th Shaft Rear
Draw out the 7th Shaft front (1), 27T gear (2), collar (3), bearing (4),
coupling (5) and 7th shaft middle (6) as a unit.
Spiral Bevel Pinion Shaft
Remove the bearing holder mounting screws, and pull out the spiral bevel
pinion shaft. Bearing holder mounting screw - 16.7 to 19.6 Nm (12.3 to
14.5 ft-lbs).
Differential
Remove the right and left differential bearing holders. Remove the
differential assembly from the differential gear case. Install the
differential bearing holders, noting the number of shims in the right
and left differential bearing holders.
Kubota B2150, B9200 Tractor - Transmission Case and
Differential Gear Case Service
Bearing Check
While holding the inner race, push and pull the outer race in all
directions to check for wear and roughness. Apply transmission oil to
the bearing and hold the inner race. Turn the outer race to check for
smooth rotation of the race. For needle bearing, lay the needle rollers
to check for any damage and wear.
PTO Shaft and 7th Shaft Rear
Remove the rear cover mounting screw. Remove the PTO shaft with rear
cover. Draw out the 7th shaft rear from the differential gear case.
Backlash between Gear and Spline
Secure the shaft in a vise. Set a dial indicator (lever type). Move the
gear by hand for measurement. If the measurement exceeds the allowable
limit, replace it. Backlash between gear and spline - 0.030 to 0.078 mm
(0.001 to 0.003 in). Allowable limit - 0.2 mm (0.008 in).
Gear Backlash
Set a dial indicator (lever type). Move the gear to measure the
backlash, while holding the mating gear. If the measurement exceeds the
allowable limit, replace it. Gear Backlash - 0.10 to 0.20 mm (0.004 to
0.008 in). Allowable limit - 0.4 mm (0.016 in). Dial indicator setting -
Remove the front cover (1), and remove the shift fork and fork shaft.
Replace the front cover, and set the PTO guide plate (2) on the top of
the transmission case. Set the dial indicator (magnet base type) on the
PTO guide plate.
Clearance between Shift Fork and Shift Gear Groove
Insert the fork into the shift gear groove and measure the clearance
with a feeler gauge. If the clearance exceeds the allowable limit,
replace it. Clearance between 24T gear and PTO shift fork - 0.10 to 0.30
mm (0.004 to 0.012 in). Allowable limit - 0.5 mm (0.020 in). Clearance
between 16T-29T gear and shift fork - 0.10 to0.35 mm (0.004 to 0.014
in). Allowable limit - 0.5 mm (0.020 in). Clearance between 24T gear and
PTO shift fork - 0.10 to 0.35 mm (0.004 to 0.014 in). Allowable limit -
0.5 mm (0.020 in).
Clearance between Gear and Shaft
Measure the gear I.D. with an inside micrometer, and then shaft O.D.
with an outside micrometer. Measure the O.D. of two needles in the
needle bearing with an outside micrometer. Clearance is the difference
between the gear I.D. and the sum of shaft O.D. and two needle O.D. If
the clearance is not within the factory specifications, replace it.
Clearance between 12T gear and 3rd shaft - 0 007 to 0.053 mm (0.0003 to
0.0021 in). Allowable limit - 0.10 mm 0.0039 in. 3rd shaft O.D. - 21.987
to 22.000 mm (0.8656 to 0.8661 in). 12T gear I.D. - 27.007 to 27.028 mm
(1.0633 to 1.0641 in). Needle O.D. - 2.494 to 2.500 mm (0.0982 to 0.0984
in). Clearance between 27T gear and 6th shaft - 0.009 to 0.059 mm
(0.0004 to 0 0023 in). Allowable limit - 0.10 mm (0.0039 in). 6th shaft
O.D. - 27.987 to 28.000 mm (1.1019 to 1.1024 in). 27T gear I.D. - 32.009
to 32.034 mm (1.2602 to 1.2612 in). Needle O.D. - 1.994 to 2.000 mm
(0.0785 to 0.0787 in).
Turning Torque of Spiral Bevel Pinion Shaft
Secure the spiral bevel pinion shaft in a vise. Set a spring balance to
the screw hole in the bearing holder. Pull the spring balance in the
direction at a right angle to the center line of the spiral bevel pinion
shaft to measure the turning load. If the turning load is not within the
factory specifications, adjust with the staking nut on the spiral bevel
pinion shaft. Turning torque of spiral bevel pinion shaft - 0.98 to 4.90
Nm (0.22 to 1.10 ft-lbs).
Backlash between Spiral Bevel Pinion and Spiral Bevel Gear
Set the dial indicator (lever type) with its finger on the tooth surface
of bevel gear. Measure the backlash by fixing the spiral bevel pinion
and moving bevel gear by hand. If the clearance exceeds the allowable
limit, adjust with the shims at bearing holders. Adjust the backlash
properly by repeating the above procedures. Backlash between spiral
bevel pinion and spiral bevel gear - 0.10 to 0.20 mm (0.0039 to 0.0080
in). Apply red lead lightly over several teeth at three positions
equally spaced on the bevel gear. Turn the spiral bevel pinion while
pressing a wooden piece against the periphery of the bevel gear. Check
the tooth contact if not proper, adjust according to the instructions
below.
Kubota B2150, B9200 Dual Stage Clutch -
Checking And Adjusting
Clutch Pedal Play
Depress the clutch pedal by hand, and measure the amount of pedal
movement. If the measurement is not within the factory specifications,
adjust the play by turning the rod. Clutch pedal play - 20 to 30 mm 0.79
to 1.18 in.
Clutch Pedal Traveling
Measure the distance between adjusting screw and stopper. If the
measurement is not within the factory specifications, adjust it with the
clutch adjusting screw. Distance between adjusting screw and stopper -
16 to 17 mm 0.63 to 0.67 in.
Safety Switch Setting Length
Measure the distance between the clutch rod plate and the tip of the
safety switch. If the measurement is not within the factory
specifications, adjust with the mounting nut. Distance between clutch
rod plate and tip of safety switch - 25 to 27 mm 0.98 to 1.06 in.
Clearance between Pressure Plate 2 and Adjusting Screw
Remove the cover located on the right side of flywheel housing case.
Loosen the lock nut, turn the adjusting screw by using 6 mm (0.24 in.)
wrench until head of the screw contacts pressure plate slightly. Make
3/4 turn counterclockwise to give the clearance of factory
specification. Tighten the lock nut, holding the adjusting screw.
Clearance between pressure plate 2 and adjusting screw - 1.4 to 1.5 mm
0.055 to 0 059 in.
Kubota B2150, B9200 Tractor - Dual Stage Clutch
Removing And Replacing
Removing Clutch
Insert the clutch center bar with the guide. Remove the mounting screws.
Remove the clutch assembly with the clutch center bar. Be sure to align
the center of disc (Travelling) and flywheel by inserting the clutch
center tool with the guide. Do not allow grease and oil on the clutch
disc facing.
Disassembling Clutch Assembly
1 - Clutch Disc (Traveling), 2 - Pressure Plate (Traveling), 3 - Release
Lever, 4 - Belleville Spring, 5 - Clutch Cover, 6 - Clutch Disc (PTO), 7
- Pressure Plate (PTO), 8 - Belleville Spring, 9 - Clutch Cover
Draw out the joint pins and disconnect the release levers (3). Loosen
the three clamping bolts evenly and remove them. Remove the clutch cover
(9), belleville spring (8), pressure plate (7), and clutch disc (6) in
order. Remove the clutch cover (5), belleville spring (4), and pressure
plate (travelling) (2) in order. When assembling the clutch covers and
pressure plates, be sure to align the parting marks to insure proper
dynamic balance.
Clutch Rod and Clutch Release Fork
Remove the cotter pin at end of clutch rod. Draw out the clutch lever to
remove the release fork. Remove the release spring and the bolt. Remove
the release bearing and release hub as a unit. Make sure the direction
of the release fork is correct. Inject grease to the release hub.
Kubota B2150, B9200 - Dual Stage Clutch Service
Backlash between Clutch Disc Boss and Shaft
Mount the PTO clutch disc to the propeller shaft 2. Hold the propeller
shaft 2 so that it does not turn. Rotate the disc lightly and measure
the displacement around the disc edge. If the movement exceeds the
allowable limit, replace. Displacement around disc edge (PTO) (Allowable
limit) - 2 mm 0.079 in. Perform measurement for the travelling clutch
disc and the propeller shaft 1 in the same way as above. Displacement
around disc edge (travelling) (Allowable limit) - 2 mm 0.079 in.
Release Bearing
1 - Belleville Spring, 2 - Release Bearing, 3 - Shim, 4 - Release Hub, 5
- External Snap Ring
Remove the belleville spring (1), release bearing (2) and shim (3) (if
equipped) from the release hub (4) after taking off the external snap
ring (5). Check for an abnormal wear on the contact surface of it. Hold
the bearing inner race and rotate the outer race, while applying
pressure to it. If the bearing rotation is rough or noisy, replace it.
Set the belleville spring in the correct direction. Set the release
bearing so that the working force of it is 78 to 118 N (8 to 12 kgf, 18
to 26 lbs) in the radial direction by adjusting with the shim
(thickness: 0.2 mm, 0.079 in.).
Mutual Difference of Release Lever
Insert the clutch center bar and gauge ring with the guide. Measure the
clearance between gauge ring and the top of adjusting screw with a
feeler gauge. If the clearance is not within the factory specifications,
adjust with the adjusting screws. Mutual difference of release lever -
0.0 to 0.2 mm 0.000 to 0.008 in.
Release lever Height
Mount the clutch on the clutch table with the clutch center bar and
gauge ring. Adjust the height of the three release levers with the gauge
ring. Measure the clearance between the gauge ring and the top of
adjusting screw with a feeler gauge. If the clearance is not within the
factory specifications, adjust with the adjusting screws. Clearance
between gauge ring and the top of adjusting screw - 0.0 to 0.7 mm 0.000
to 0.028 in. Apply adhesive to the adjusting screws, replace lever and
lock nuts.
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KUBOTA TRACTORS SPECIFICATIONS |
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KUBOTA ENGINES DATA AND SERVICE SPECS |
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KUBOTA FRONT END LOADERS |
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KUBOTA TRACTORS TROUBLESHOOTING | ||||
L235 | L2501 | L2550 | L275 | L3110 |
L3301 | L35 | L3710 | L3901 | L4310 |
L5030 | M4700 | M5700 | M6040 | M6800 |
M8200 | M8540 | M9000 | MX5100 | MX5200 |