Part of the Kubota Parts Manuals.
This is the factory parts catalog for the Kubota BL4520 backhoe, a 31-page illustrated PDF ready to download and print. It documents the attachment assembly by assembly, with an exploded diagram beside each parts list showing reference numbers, Kubota part numbers, quantities, and serial-number ranges.
The catalog covers the main frame assembly, boom, bucket and dipperstick, hoses and fittings, the tank and pump, gear pump, valve control linkage and plumbing, the valve assembly with its seal kits, every hydraulic cylinder (swing, dipperstick and bucket, stabilizer, and boom), and the L-4525 and L-4522 mounting kits used to fit the backhoe to a tractor.
Use it to pin down the exact replacement part from the drawing, order the right seal kit for a leaking cylinder or valve, and check serial-range interchangeability before buying. It identifies parts; it is not a step-by-step service manual.
What's Inside This Parts Manual
| System | Pages |
|---|---|
| Main Frame Assembly 4520 | |
| Boom Assembly | |
| Bucket & Dipstick Assembly | |
| Hoses & Fittings | |
| Tank & Pump Assembly | |
| Gear Pump | |
| Valve Control Linkage & Plumbing | |
| Valve Assembly | |
| Swing Cylinder | |
| Dipperstick & Bucket Cylinder | |
| Stabilizer Cylinder | |
| Boom Cylinder | |
| Mounting Kit L-4525 | |
| Mounting Kit L-4522 |
Every system also includes seal kit.
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Capscrew Torque | 33-38 N-M/25-28 Ft. Lbs. | p. 14 |
| Hose Size (replacement) | 9/16-18 X 1/4 NPT | p. 11 |
| Fitting Size (replacement) | 9/16 FLARE X 1/2 X 1 | p. 13 |
| 8 CAPSCREWS Torque | 33 N-M | p. 14 |
| Ball ID (REF.No 9) | 1.5 inches | p. 4 |
| Pivot Pin Length (REF.No 12) | 5.875 inches | p. 4 |
| Cotter Pin Diameter (REF.No 36) | 0.09375 inches | p. 4 |
| Hex Bolt Thread Size (REF.No 39) | 1/4 NC X 3/4 | p. 4 |
| Clevis Pin Length (REF.No 41) | 1.875 inches | p. 4 |
