Hst - Kubota B1830 Workshop Manual

B1830,B2230,B2530,B3030, WSM

(3) HST

PTO Brake Disk and Brake Plate 1
1. Measure the PTO brake disk thickness with a vernier calipers.
2. Measure the brake plate thickness with a vernier calipers.
3. If the thickness is less than the allowable limit, replace it.
Factory specification
PTO brake disk
thickness
Allowable limit
Factory specification
Mechanical PTO brake
plate 1 thickness
Allowable limit
(1) PTO Brake Disk
Pump Shaft
1. Pull out the pump shaft from the HST housing case.
2. Check the oil seal surface (1) the bearing surface (2) and the
bearing.
3. If the shaft is rough or grooved, replace it.
4. If the bearing is worn, replace it.
(1) Oil Seal Surface
Motor Shaft
1. Pull out the motor shaft from the HST housing case.
2. Check the oil seal surface (1) the bearing surface (2) and the
bearing.
3. If the shaft is rough or grooved, replace it.
4. If the bearing is worn, replace it.
(1) Oil Seal Surface
Cylinder Block Bore and Pistons
1. Lift all the pistons gently with the retainer plate (1).
2. Check the pistons for their free movement in the cylinder block
bores.
3. If the piston or the cylinder block bore is scored, replace cylinder
block assembly.
IMPORTANT
• Do not interchange pistons between pump and motor
cylinder block. Pistons and cylinder blocks are matched.
(1) Retainer Plate
3-S68
TRANSMISSION
1.70 to 1.90 mm
0.067 to 0.075 in.
1.55 mm
0.061 in.
1.95 to 2.05 mm
0.0768 to 0.0807 in.
1.8 mm
0.071 in.
(2) Brake Plate 1
9Y1210003TRS0091US0
(2) Bearing Surface
9Y1210003TRS0092US0
(2) Bearing Surface
9Y1210003TRS0093US0
(2) Piston Slipper
9Y1210003TRS0094US0
KiSC issued 05, 2012 A