Part of the Kubota Parts Manuals.
This is the Kubota parts catalog for the B/L4520B and L4530B backhoe attachments, a 50-page PDF you download and keep. It breaks each backhoe into its assemblies: the main frame, boom, dipperstick and bucket, the tank and pump, gear pumps, console valve, and every hydraulic cylinder, each shown as an exploded diagram with Kubota part numbers.
Use it to pin down the exact component before ordering. Match a worn cylinder, seal, pin or valve part to its number, and check which model a part applies to, since the catalog calls out 4520B and 4530B parts separately where they differ.
It also covers the swing, stabilizer, boom and bucket cylinders, the hoses and fittings, and the tractor mounting kits, so it is the reference for identifying parts on any B/L4520B or L4530B backhoe repair.
What's Inside This Parts Manual
| System | Pages | Key Topics |
|---|---|---|
| Hydraulics & 3-Point Hitch | 4520B Tank & Pump Assembly, 4530B Tank & Pump Assembly, 4520B Gear Pump Assembly, 4530B Cessna Gear Pump Assembly, 4530B Fenner-Stone Hydraulic Gear Pump Assembly, 4520B & 4530B Console Valve Assembly, 4520B & 4530B Valve Controls & Hardware, 4520B & 4530B Swing Cylinder, 4520B Dipperstick & Bucket Cylinder 4530B Bucket Cylinder, 4520B Stabilizer Cylinder, 4530B Stabilizer Cylinder, 4520B Boom Cylinder 4530B Boom & Dipperstick Cylinder | |
| Body & Operator Station | 4520B & 4530B Main Frame Assembly | |
| Other Components | 4250B Boom Assembly, 4530B Boom Assembly, 4520B & 4530B Dipperstick & Bucket Assembly, 4520B Hoses & Fittings, 4530B Hoses & Fittings, Mounting Kit B-4521, Mounting Kit L-4523, Mounting Kit B-4524, Mounting Kit L-4525, Mounting Kit B-4526, Mounting Kit L-4531 |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| 4520B GEAR PUMP ASSEMBLY | ||
| Torque for (8) capscrews | 33-38 N-M/25-28 Ft. Lbs. | p. 19 |
| All Models | ||
| Ball Bushing ID | 1.5 inches | p. 4 |
| Pitch (Console Valve) | 8mm x 1.25mm | p. 26 |
| Tie Rod (Swing Cylinder) | 7/16 NF x 16 | p. 30 |
| Hydraulic Cylinder (Dipperstick/Bucket) | 2 x 16.75 inches | p. 32 |
| 4520B | ||
| Hydraulic Cylinder (Stabilizer), 4520B | 2x10 inches | p. 4 |
| Capscrew Torque (Gear Pump) | 33-38 N-M / 25-28 Ft. Lbs. | p. 19 |
| 4530B | ||
| Hydraulic Cylinder (Stabilizer), 4530B | 2x14.5 inches | p. 4 |
| Key Dimension (Cessna Gear Pump) | 1/4 x 1/4 x 15/16 inches | p. 22 |
| 4250B | ||
| Hydraulic Cylinder (Boom) | 2.5x16.75 inches | p. 6 |
| B/L4527B | ||
| Bucket Size (Standard) | 10 BH | p. 10 |
| L-4523 | ||
| Lock Pin (Mounting Kit) | 3/4 x 11 inches | p. 42 |
