Cylinder Block Bore And Pistons; Piston Slipper And Retainer Plate; Cylinder Block Face; Valve Plate - Kubota B2410 Workshop Manual

3 TRANSMISSION
12010P30460
12010P30470
82410· 82710· 82910 WSM, 12271
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.
Factory spec.
0.02 mm
Clearance between
0.0008 in.
piston and bore
Allowable limit
0.04 mm
0.0016 in.
(1) Retainer Plate
12270830320
Piston Slipper and Retainer Plate
1. Check the slipper (1) for flatness.
2. If rounded, replace.
3. Measure the thickness of piston slipper.
4. If the measurement is less than the allowable limit, replace.
5. Check the lubricant hole (2) for clogging.
• IMPORTANT
• Do not interchange pistons between pump and motor
cylinder block. Pistons and cylinder blocks are matched.
Factory spec.
3.00 mm
0.118 in.
Thickness of slipper
2.90 mm
Allowable limit
0.114 in.
Cylinder Block Face
1. Check the polished face (1) of cylinder block for scoring.
2. If scored, replace cylinder block assembly.
3. Check the spring (2) for breakage.
4. If broken, replace cylinder block assembly.
12010P30480
(1) Piston Slipper
(1) Polished Face
(2) Lubricant Hole
(2) Spring
12010830420
12010830430
12010P30490
Valve Plate
1. Check the engagement of the valve plate (1) and the anchor pin
(2).
2. Pushing the valve plate against the anchor pin, lift it to remove.
3. Check the valve plate for foreign particles.
4. Clean the valve plate and dry with compressed air.
5. Check the valve plate for scratches, wear and erosion. (Run a
finger nail across the valve plate surface. If worn, it will be felt.)
6. If worn or scored, replace.
• NOTE
• After checking, coat them with hydrostatic transmission oil.
(1) Valve Plates
3-S30
(2) Anchor Pin
12010830440