Part of the Kubota Parts Manuals.
This is the Kubota factory parts catalog for the TL421 front loader, the loader mounted on Kubota compact tractors such as the B21. Across 31 pages it presents exploded diagrams with reference numbers, Kubota part numbers, quantities, and serial ranges so you can identify each loader part before you order.
The catalog covers the whole loader: the side frame and swing frame, the bucket, the control valve and its internal component parts, the control lever and lever cover, the link, the boom and bucket cylinders with their component parts, the hydraulic tubes, the delivery and return hoses, and the front guard.
Front loaders take heavy abuse, so couplers, seals, hoses, and pins wear out and booms can go out of level. This catalog lets you match cylinder seal kits, hoses, valve parts, and pins to your exact TL421 instead of guessing between similar Kubota loader numbers.
Complete the set for your TL421
- Repair Manual: Kubota B21, TL421, BT751 Shop Manual (incl. Wiring)
What's Inside This Parts Manual
| System | Pages | Key Topics |
|---|---|---|
| Side Frame | 3-4 | Side Frame Diagram, Interchangeability Symbols Definition, Side Frame Parts List, Frame Side LH(Label), Label Model, Label Lubricate, Pin Spring, Frame Side RH(Label) |
| Swing Frame | 5-6 | Swing Frame Diagram, Interchangeability Symbols Definition, Swing Frame Parts List, Boom, Label Kubota, Label B21, Pin 1, Pin 2 |
| Bucket | 7-8 | Bucket Diagram, Interchangeability Symbols Definition, Bucket Parts List, Bucket 56, Edge Cutting, Label Leveler, Label Model, Pin 3 |
| Control Valve | 9-10 | Control Valve Diagram, Interchangeability Symbols Definition, Control Valve Parts List, Stay Valve, Hex.Bolt, Washer Spring Lock, Valve Control, Hex.Nut |
| Control Valve(Component Parts) | 11-12 | Control Valve(Component Parts) Diagram, Interchangeability Symbols Definition, Control Valve(Component Parts) Parts List, Valve Control, Assy Inlet Section, O-Ring, Assy Spool Section 1, Clevis End |
| Control Lever | 13-14 | Control Lever Diagram, Interchangeability Symbols Definition, Control Lever Parts List, Lever, Bushing, Collar 5/8, Cir-Clip External, Rod 1 |
| Lever Cover | 15-16 | Lever Cover Diagram, Interchangeability Symbols Definition, Lever Cover Parts List, Comp Cover, Bushing, Hex.Bolt, Washer Spring Lock, Label Control |
| Link | 17-18 | Link Diagram, Interchangeability Symbols Definition, Link Parts List, Link 3, Bushing, Link 4, Pin Spring, Rod 1 Connecting |
| Cylinder Hydraulic Hose | 19-20 | Cylinder Hydraulic Hose Diagram, Interchangeability Symbols Definition, Cylinder Hydraulic Hose Parts List, Cylinder 1, Cylinder 2, Band Code, Mark White, Mark Yellow |
| Boom Cylinder (Component Parts) | 21-22 | Boom Cylinder (Component Parts) Diagram, Interchangeability Symbols Definition, Boom Cylinder (Component Parts) Parts List, Cylinder 1, Tube 1 Comp, Rod 1 Comp, Head 1, Piston 1 |
| Bucket Cylinder (Component Parts) | 23-24 | Bucket Cylinder (Component Parts) Diagram, Interchangeability Symbols Definition, Bucket Cylinder (Component Parts) Parts List, Cylinder 2, Tube 2 Comp, Rod 2 Comp, Head, Piston |
| Hydraulic Tube | 25-26 | Hydraulic Tube Diagram, Interchangeability Symbols Definition, Hydraulic Tube Parts List, Tube 1 Hydraulic, Tube 2 Hydraulic, Tube 3 Hydraulic, Tube 4 Hydraulic, Clamp 1 |
| Delivery Return Hose | 27-28 | Delivery Return Hose Diagram, Interchangeability Symbols Definition, Delivery Return Hose Parts List, Tube P.B., Sleeve, Hose 5 Hydraulic, Sleeve 1, Tube Pump |
| Front Guard | 29-30 | Front Guard Diagram, Interchangeability Symbols Definition, Front Guard Parts List, Guard Front, Collar, Hex.Bolt, Washer Plain, Washer Spring Lock |
| Accessories and Service Parts | 31 | Interchangeability Symbols Definition, Accessories and Service Parts Parts List, Operator's Manual |
Every system also includes interchangeability symbols definition, a parts list, and a diagram.
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| PIN COTTER dimension | 1/32*1/2 | p. 14 |
| PIN SPRING dimension | 1/4*1.0 | p. 18 |
| Hex.Bolt size | 9/16-18UNF*1 1/2 | p. 4 |
| Washer Spring Lock size | 9/16 | p. 4 |
| Fitting Grease type | 1/4-28T.T. | p. 6 |
| Nut Locking size | 1/4-20UNC | p. 6 |
| Pin Spring size | 1/4*1.0 | p. 18 |
| Fitting Grease angle | 90DEG. | p. 22 |
| Pin Clevis size | 3/8*3/4 | p. 30 |
