Part of the Kubota Parts Manuals.
This Kubota RC72-30B parts catalog is the factory illustrated parts list for the RC72-30B mid-mount mower deck. It provides exploded diagrams and Kubota part numbers for the universal joint, bevel gear case, pulley holder, blade, tension pulley, mower deck, front gauge wheel, rear wheel, discharge cover, linkage, lift linkage, lift arm, and stopper assemblies.Use it to match a worn component to its exact Kubota part number, verify quantities, and read the interchangeability and serial-number notes before you order. Each section pairs a numbered drawing with its parts table, so you can trace a part from the diagram straight to the order sheet.This is a parts reference, not a step-by-step repair manual. It suits owners and independent mechanics servicing the deck drivetrain, blade spindle, belt drive, and the wheel and lift linkage wear points on the RC72-30B and RC72-30BB.
What's Inside This Kubota RC72-30B Parts Manual
| System | Pages | Key Topics |
|---|---|---|
| Universal Joint | 4-5 | PTO Yoke, Quick Yoke, Yoke Shaft, Sleeve Yoke, Grease Nipple, Cross Joint Assembly, Snap Ring |
| Bevel Gear Case | 6-7 | Gasket, LH Bevel Case Stay, RH Bevel Case Stay, Pinion Shaft, Bevel Gear Kit (17-18T), Oil Seal |
| Pulley Holder | 8-9 | Center Pulley Holder, Collar, Oil Seal, Extension Pipe, Grease Nipple, Spline Boss, Dust Cover, Blade |
| Blade | 10-11 | Side Holder, Blade Shaft, Oil Seal, Grease Nipple, Side Pulley, Spline Boss, Dust Cover |
| Tension Pulley | 12-13 | Belt, Tension Arm, Bushing, Tension Spacer, Tension Cover, Bearing Seal, Grease Nipple |
| Mower Deck | 14-15 | Mower Deck Assembly, Caution Label, LH Cover, RH Cover, Cutting Height Label |
| Front Gauge Wheel | 16-17 | Front Wheel, Snap Ring, Bushing, Collar, LH Front Wheel Stay, RH Front Wheel Stay, Grease Nipple, Front Wheel Shaft |
| Rear Wheel | 18-19 | Bushing, Grease Nipple, Collar, LH Wheel Stay, RH Wheel Stay, Wheel Shaft |
| Discharge Cover | 20-21 | Anti-Scalp Roller Assembly, Bushing, Chute Cover, Chute Stopper, Spring |
| Linkage | 22-23 | LH Bracket, RH Bracket, Anti-Scalp Roller Assembly, Bushing, Front Stay, Lever Grip, Front Link, Snap Ring |
| Lift Linkage | 24-25 | LH Front Stay, RH Front Stay, Lift Shaft, LH Lift Arm, RH Lift Arm, Grease Nipple, LH Stopper Plate, RH Stopper Plate |
| Lift Arm | 26-27 | Rod, Turnbuckle, LH Lift Arm, RH Lift Arm |
| Stopper | 28-30 | LH Loader Stopper, RH Loader Stopper, Bolts, Washers |
| Accessories and Service Parts | 31 | - |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Kit Gear Bevel tooth count | 17-18T | p. 7 |
| Shim thickness | 0.2mm | p. 7 |
Kubota RC72-30B Common Problems This Manual Covers
Deck will not spin up or loses drive
A worn or broken universal joint or drive yoke can stop the deck from turning or cause it to lose drive under load. The Universal Joint section lists the joint, yokes, and cross assemblies to inspect.
Manual Section: Universal Joint p. 4Weak drive or gearbox noise
Loss of power to the blades often traces to the bevel gear case, its pinion shaft, gears, or bearings. The Bevel Gear Case parts list identifies the internal components and shim sizes for a rebuild.
Manual Section: Bevel Gear Case p. 6Vibration or spindle noise
Worn bearings or a damaged blade boss in the pulley holder cause vibration and noise during operation. The Pulley Holder section lists the holder, bearings, seals, and boss for that spindle stack.
Manual Section: Pulley Holder p. 8Poor cut, scalping, or striping
Uneven cut quality often comes from worn gauge wheels or an incorrect deck level rather than the blades alone. The Front Gauge Wheel section lists the wheels, bushings, shafts, and pins used to set deck height.
Manual Section: Front Gauge Wheel p. 16Belt slips or squeals
Incorrect tension or a worn belt and idler cause slipping and squealing after short use. The Tension Pulley section covers the belt, arm, spacer, pulley, and spring that maintain belt tension.
Manual Section: Tension Pulley p. 12Inconsistent deck height or lift
Erratic height and leveling problems usually point to wear in the lift links and adjustment points. The Lift Linkage section maps the shafts, arms, links, and shims used to raise and level the deck.
Manual Section: Lift Linkage p. 24Frequently Asked Questions
Which mower does this catalog cover?
It is the parts catalog for the Kubota RC72-30B mid-mount mower deck, including the RC72-30BB variant. It covers the deck assembly and its components, not the tractor.
Does it include exploded diagrams and part numbers?
Yes. Each assembly pairs a numbered exploded drawing with a parts table listing reference numbers, Kubota part numbers, quantities, and interchangeability notes so you can order the exact part.
Where are the gearbox parts listed?
The Bevel Gear Case section covers the gearbox, including the pinion shaft, bevel gears, bearings, and shims used to set gear mesh. Use it when servicing the deck drive gearbox. p. 6
Which section covers the blade and belt?
The Blade section lists the blade and its locking hardware, and the Tension Pulley section covers the belt and idler. Use the Blade section for cutting components. p. 10
What do I get after purchasing this Kubota RC72-30B manual?
A 31-page searchable PDF that downloads instantly after checkout. Open it on a laptop, tablet, or phone — no shipping wait.
Can I print this manual?
Yes. Print as many copies as you need, with no restrictions. Plenty of mechanics run off just the section they are working on.
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