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 14 assemblies: 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, Shaft Yoke, Assy Joint Cross, Pin Joint, Bolt |
| Bevel Gear Case | 6-7 | Case Bevel Gear, Shaft Pinion, Kit Gear Bevel, Bearing Ball, Seal Oil, Shaft Bevel Gear |
| Pulley Holder | 8-9 | Holder Center Pulley, Bearing Ball, Seal Oil, Boss Spline, Blade, Bolt Locking Blade |
| Blade | 10-11 | Holder Side, Shaft Blade, Bearing Ball, Pulley Side, Bolt Locking Blade |
| Tension Pulley | 12-13 | Belt, Arm, Spacer Tension, Comp.Pulley Tension, Seal Bearing, Spring Tension |
| Mower Deck | 14-15 | Assy Deck Mower, Label Caution, Cover Lh, Cover Rh, Label Cutting Height |
| Front Gauge Wheel | 16-17 | Pin Joint, Front Wheel, Bush, Stay Front Wheel Lh, Shaft Front Wheel, Cir Clip External |
| Rear Wheel | 18-19 | Front Wheel, Bush, Stay Wheel Lh, Stay Wheel Rh, Bolt, Ring Snap |
| Discharge Cover | 20-21 | Assy Roll.Anti-Scalp, Pin Gauge Wheel, Washer Plain, Pin Split, Cover Chute, Stopper Chute |
| Linkage | 22-23 | Bracket Lh, Bracket Rh, Assy Roll.Anti-Scalp, Pin Gauge Wheel, Stay Front, Grip Lever |
| Lift Linkage | 24-25 | Stay Front Lh, Shaft Lift, Arm Lift Lh, Shim Adjusting, Nipple Grease, Link Lift |
| Lift Arm | 26-27 | Rod, Pin Joint, Washer Plain, Pin Split, Turnbuckle, Arm Lift Lh |
| Stopper | 28-30 | Loader Lh, Loader Rh, Bolt, Washer Plain, Nut |
| 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 are the replacement specifications for blade boss?
Blade boss 76539-34392 has a listed weight of 0.06 kgf (0.132 lb). Look for it in the BLADE section of the parts book.
Is this Kubota RC72-30B Parts Catalog a digital download?
Yes. It's a 31-page Parts Catalog in searchable PDF, ready to download the moment checkout completes. Open it on a computer, tablet, or phone with no shipping wait.
Can I print this Kubota RC72-30B manual?
No restrictions at all: the PDF is DRM-free. Print whatever sections you need to take out to the shop. Standard letter or A4 paper works fine.
Document Quality
This is a native digital PDF, allowing you to search and copy all text, including part numbers and descriptions. The text throughout the document is crisp and very easy to read. Diagrams are raster images; their labels are readable at standard zoom, but the images will pixelate if magnified significantly. All pages are clean, free of scan artifacts or marks, and there are no notable blank or filler pages.
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