Part of the Kubota Repair Manuals.
This Kubota Workshop Manual covers the RCK48-15BX, RCK48-22BX, RCK54-15BX, RCK54-22BX, and RCK60B-22BX rotary mower decks for BX-series machines. It is a 46 page PDF you download and keep, organized into mechanism and servicing so you understand how the deck works before you take it apart.You get safety information, terminology for every deck component, specifications with cutting width and blade spindle speed, and a general section with mower identification, lubricants, tightening torques, a maintenance check list, and setup and adjustment steps. The rotary mower section then details power transmission, the lifting mechanism, and the self-balancer system.With it you can set cutting height, correct blade tip differences, service the gear box, adjust belts and pulleys, and torque the blade and pulley hardware to the factory figures.
What's Inside This Kubota RCK48–RCK60 Series Manual
| System | Pages | Key Topics |
|---|---|---|
| Safety First | 3-5 | - |
| Safety Decals | 6-8 | - |
| Terminology | 9-10 | Front Anti-Scalp Roller, Belt Cover, Gear Box, Universal Joint, Center Blade, Outer Blade |
| Specifications | 11 | Suitable Tractor, Mounting Method, Cutting Width, Cutting Height, Blade Spindle Speed, Dimensions |
| G General | 12-27 | Contents (1.Mower Identification, General Precaution, Lubricants, Tightening Torques, Maintenance Check List, Check and Maintenance, Setting Up Mower, Mower Adjustment) |
| Rotary Mower | 28-45 | Contents (1.Power Transmission, Lifting Mechanism, Self-Balancer System) |
| 46 | Contents (1.Mower Identification, General Precaution, Lubricants, Tightening Torques, Maintenance Check List, Check and Maintenance, Setting Up Mower, Mower Adjustment) |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Mower blade screw tightening torque | 102.9 to 117.7 N·m (10.5 to 12.0 kgf·m, 75.9 to 86.8 ft-lbs) | p. 38 |
| Gear box mounting screw and nut tightening torque | 77.4 to 90.2 N·m (7.9 to 9.2 kgf·m, 57.1 to 66.5 ft-lbs) | p. 36 |
| Gear Box Oil Capacity | 0.36 L | p. 16 |
| Outer Pulley Mounting Nut Tightening Torque | 196.17 to 225.6 N·m | p. 36 |
| Pinion Shaft Turning Force (Max) | Less than 117.7 N | p. 35 |
| Bevel Gears in Gear Box Backlash (Factory Spec) | 0.1 to 0.2 mm | p. 35 |
| Bevel Gears in Gear Box Backlash (Allowable Limit) | 0.4 mm | p. 35 |
| Clearance between stopper and rear link | 1.0 to 2.0 mm | p. 24 |
| Difference (R-F) between front tip and rear tip of blade | 0.0 to 5.0 mm | p. 25 |
| Difference (L-R) between left tip and right tip of blade | Less than 3 mm | p. 26 |
| Balancer spring length (L) (Right and left) | 55.0 mm | p. 26 |
| Pulley Boss Mounting Nut Tightening Torque | 23.5 to 27.4 N-m | p. 42 |
Kubota RCK48–RCK60 Series Common Problems This Manual Covers
Uneven cutting height or scalping
An uneven or scalped cut is set right through deck adjustment. The mower adjustment section covers leveling and blade tip settings.
Manual Section: Mower Adjustment p. 24Blade vibration or imbalance
Vibration often means the blade tip differences are out of spec. The servicing specifications give the allowable front to rear and left to right blade differences.
Manual Section: Servicing Specifications p. 35Belt slip or drive loss
A deck that stops cutting under load is worked through the power transmission section covering the belts, pulleys, and drive.
Manual Section: Power Transmission p. 30Gear box noise or backlash
A noisy gear box usually means worn bevel gears or excess backlash. The checking, disassembling and servicing section covers the gear box service.
Manual Section: Checking, Disassembling and Servicing p. 37Deck will not lift or lower smoothly
Lifting trouble is traced through the lifting mechanism section, which explains how the deck raises and lowers.
Manual Section: Lifting Mechanism p. 31Self-balancer spring problems
Poor deck float or leveling can come from the self-balancer springs. This section covers the self-balancer system and its settings.
Manual Section: Self-Balancer System p. 32Loose blade or pulley hardware
Blade and pulley fasteners must be set to the correct torque to stay secure. The tightening torques section lists the blade screw and pulley nut figures.
Manual Section: Tightening Torques p. 36Frequently Asked Questions
Which mower decks does this manual cover?
It covers the Kubota RCK48-15BX, RCK48-22BX, RCK54-15BX, RCK54-22BX, and RCK60B-22BX rotary mower decks used on BX-series machines. It is a workshop manual split into mechanism and servicing.
Does it give blade and pulley torque figures?
Yes. The tightening torques section lists the mower blade screw and pulley nut torques, so you can secure the cutting hardware to the factory specification. p. 36
Does it cover the gear box and lubrication?
Yes. The lubricants section gives the gear box oil capacity, and the servicing section covers checking and servicing the gear box itself. p. 16
Does it explain deck setup and adjustment?
Yes. The mower adjustment section covers setting cutting height and correcting blade tip differences, with the clearances and specifications to check against. p. 24
How will I receive this Kubota RCK48–RCK60 Series Workshop Manual?
Download the complete 46-page searchable Workshop Manual right after checkout. Open it on any device, the laptop at your desk or your phone out in the field.
Are there any print restrictions on this manual?
Absolutely. No DRM or copy protection. Print the whole manual or just the pages you need. Any home or office printer works.
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