Every part on the RC72-30B deck has a number here, and this 31-page Kubota parts catalog exists to help you find it fast. Exploded-view diagrams cover the full assembly: universal joint, bevel gear case, tension pulley, lift linkage, discharge cover, and more, each tied to OEM part numbers and component cross-references. Separate sections handle the front and rear gauge wheels, lift arm hardware, stopper assemblies, and a full accessories and service parts index for the drivetrain. The bevel gear kit runs 17-18T and takes a 0.2mm adjusting shim, with the exact part number listed so the first order is the right one. Order the wrong part and you lose days. Bookmarked by assembly and searchable on any device, it pulls up in seconds before you phone the dealer.
What's Inside This Kubota RC72-30B Parts Manual
| System | Pages | Key Topics |
|---|---|---|
| Universal Joint | 4-5 | Joint Universal, Yoke PTO, Yoke Quick, Shaft Yoke, Yoke Sleeve, Nipple Grease, Assy Joint Cross, Ring Snap |
| Bevel Gear Case | 6-7 | Case Bevel Gear, Gasket, Stay Bevel Case LH, Stay Bevel Case RH, Shaft Pinion, Kit Gear Bevel -18T, Seal Oil, Cap |
| Pulley Holder | 8-9 | Holder Center Pulley, Collar, Seal Oil, Pipe Extension, Nipple Grease, Boss Spline, Cover Dust, Blade |
| Blade | 10-11 | Holder Side, Shaft Blade, Seal Oil, Nipple Grease, Pulley Side, Boss Spline, Cover Dust |
| Tension Pulley | 12-13 | Belt, Arm, Bush, Spacer Tension, Pulley Tension, Cover Tension, Seal Bearing, Nipple Grease |
| Mower Deck | 14-15 | Assy Deck Mower, Label Caution, Cover LH, Cover RH, Label Cutting Height |
| Front Gauge Wheel | 16-17 | Ring Snap, Front Wheel, Bush, Collar, Stay Front Wheel LH, Stay Front Wheel RH, Nipple Grease, Shaft Front Wheel |
| Rear Wheel | 18-19 | Front Wheel, Bush, Nipple Grease, Collar, Stay Front Wheel LH, Stay Front Wheel RH, Shaft Front Wheel, Collar Front Wheel |
| Discharge Cover | 20-21 | Assy Roll.anti-scalp, Bush, Cover Chute, Stopper Chute, Spring |
| Linkage | 22-23 | Bracket LH, Bracket RH, Assy Roll.anti-scalp, Bush, Stay Front, Grip Lever, Link Front, Ring Snap |
| Lift Linkage | 24-25 | Stay Front LH, Stay Front RH, Shaft Lift, Arm Lift LH, Arm Lift RH, Nipple Grease, Plate Stopper LH, Plate Stopper RH |
| Lift Arm | 26-27 | Rod, Turnbuckle, Arm Lift LH, Arm Lift RH |
| Stopper | 28-30 | Stopper Loader LH, Stopper Loader RH, Bolt, Washer |
| 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 |
| JOINT UNIVERSAL weight | 3.52 kgf | p. 5 |
| YOKE PTO weight | 0.4 kgf | p. 5 |
| SHAFT YOKE weight | 1.48 kgf | p. 5 |
| ASSY JOINT CROSS weight | 0.23 kgf | p. 5 |
| HOLDER CENTER PULLEY weight | 2.98 kgf | p. 9 |
| BLADE weight | 2.15 kgf | p. 9 |
| ASSY DECK MOWER weight | 88 kgf | p. 15 |
| STAY WHEEL LH weight | 6.03 kgf | p. 19 |
Kubota RC72-30B Common Problems This Manual Covers
Kubota RC72-30B deck loses drive; need universal joint assembly or cross kit part numbers p. 4
Check the Universal Joint parts diagram on page 4 and the numbered list on page 5. The complete Joint Universal assembly weighs 3.52 kgf; confirm this matches your unit before ordering. Cross-reference the Assy Joint Cross (0.23 kgf) and Pin Joint as separate line items. The Yoke PTO and Shaft Yoke are listed individually, not bundled with the cross assembly.
Manual Section: Universal JointDeck vibrating after blade replacement; can't identify correct blade boss and spindle bearing parts p. 8
Open the Pulley Holder exploded view on page 8. Locate the Boss Spline, Holder Center Pulley (2.98 kgf), and Bearing Ball as separate part numbers. Jump to the Blade section on page 10 for Shaft Blade, Bearing Ball, and Bolt Locking Blade listings. Order both bearing sets together; worn bearings in either spindle housing are the most common vibration source.
Manual Section: Pulley HolderOrdering replacement blades; unclear which Holder Side part number fits left versus right position p. 10
Flip to the Blade section on page 10. Each blade is listed at 2.15 kgf; verify the correct Holder Side and Pulley Side part numbers for your left or right position. Include the Bolt Locking Blade in your order.
Manual Section: BladeDrive belt slips under load; need tension spring and pulley part numbers for the deck p. 12
Pull up the Tension Pulley section on page 12. Belt, Arm, Spacer Tension, Comp.Pulley Tension, Seal Bearing, and Spring Tension are each separate line items. Order the Spring Tension alongside the belt; a fatigued spring is a frequent cause of repeat belt failures. Confirm the Seal Bearing part number from the same page if the tension arm shows any wobble.
Manual Section: Tension PulleyGear case making noise; can't locate bevel gear kit and correct shim part numbers p. 6
Start at the Bevel Gear Case diagram on page 6. The Kit Gear Bevel (17-18T) is listed on page 7 alongside three shim thicknesses: 0.1mm, 0.2mm, and 0.3mm. Order all three shim sizes with the gear kit; the correct combination depends on measured backlash once the case is open. Shaft Pinion, Bearing Ball, and Seal Oil are each separate line items.
Manual Section: Bevel Gear CaseFrequently Asked Questions
What are the replacement specifications for universal joint?
Universal joint K5671-32010 carries a listed weight of 3.52 kgf (7.744 lb). You'll find it in the parts list under the UNIVERSAL JOINT section.
What universal joint and cross kit part numbers does the Kubota RC72-30B use?
The complete Joint Universal assembly weighs 3.52 kgf, listed on page 4-5. The Assy Joint Cross weighs 0.23 kgf. The Yoke PTO and Shaft Yoke are listed individually. Cross-reference page 5 for all individual line items before ordering.
What bevel gear kit and shim part numbers does the Kubota RC72-30B require?
The Kit Gear Bevel (17-18T) is listed on page 7 alongside three shim thicknesses: 0.1mm, 0.2mm, and 0.3mm. Order all three shim sizes with the gear kit; the correct combination depends on measured backlash. Shaft Pinion, Bearing Ball, and Seal Oil are each listed separately on page 6.
What tension pulley and spring parts does the Kubota RC72-30B use for belt slip?
Pull up the Tension Pulley section on page 12. Belt, Arm, Spacer Tension, Comp.Pulley Tension, Seal Bearing, and Spring Tension are each separate line items. Order the Spring Tension alongside the belt — a fatigued spring is a frequent cause of repeat belt failures.
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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