Part of the Kubota Repair Manuals.
This Kubota workshop manual covers the LA1953AU and LA2253AU front loaders. Across 122 pages it gives the mechanism, servicing specifications, and repair procedures a technician needs to keep these loaders working.
The manual opens with loader specifications, safety, and terminology, then moves through the tightening torque tables for the frame, fittings, and hardware. A large mechanism section details the hydraulic circuit and control valve assembly for both models, including the spill guard and the optional third function valve.
The servicing section carries the troubleshooting charts, servicing specifications, and step by step instructions for dismounting the loader from the tractor, checking, and rebuilding the cylinders and valves. This is a repair-level PDF for owners and mechanics servicing a Kubota LA1953AU or LA2253AU, not an operator's quick guide.
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| Information | 3-13 | |
| General | 14-23 | Loader Identification, Lubricants, Tightening Torque (Stud Bolts, American Standard Screws, Bolts and Nuts with Unc or Unf Threads, Plugs, Hydraulic Fittings) |
| Mechanism | 24-90 | Hydraulic Circuit (La1953au, La2253au), Control Valve Assembly (Hydraulic Circuit, Structure, Operation) |
| Servicing | 91-122 | Accumulator Relief Valve, Dismounting Front Loader From Tractor, Stand and Side Frame, Hydraulic Hose |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| LA1953AU | ||
| Boom and bucket cylinder head torque, LA1953AU | 250 to 280 N·m (25.5 to 28.5 kgf·m, 185 to 206 lbf·ft) | p. 96 |
| Boom and bucket cylinder piston mounting nut torque, LA1953AU | 160 to 200 N·m (16.4 to 20.3 kgf·m, 119 to 147 lbf·ft) | p. 96 |
| LA2253AU | ||
| Boom and bucket cylinder head torque, LA2253AU | 500 to 550 N·m (51.0 to 56.0 kgf·m, 369 to 405 lbf·ft) | p. 96 |
| Boom and bucket cylinder piston mounting nut torque, LA2253AU | 520 to 550 N·m (53.1 to 56.0 kgf·m, 384 to 405 lbf·ft) | p. 96 |
| All Models | ||
| Hydraulic tube and hose torque | 44 to 50 N·m (4.5 to 5.1 kgf·m, 32 to 37 lbf·ft) | p. 96 |
| Hose fitting, Flare nut (UNF) 3/4 torque | 36 to 40 N·m (3.7 to 4.0 kgf·m, 27 to 29 lbf·ft) | p. 20 |
| 3rd function valve coupler torque | 49 to 58 N·m (5.0 to 5.9 kgf·m, 36 to 43 lbf·ft) | p. 119 |
| Boom/Bucket cylinder piston seal dimension A | 0.157 rad | p. 115 |
| Boom/Bucket cylinder piston seal dimension D | 42 mm (1.65 in.) | p. 115 |
| Quick hitch frame rod length 'a' | 321 to 323 mm (12.64 to 12.7 in.) | p. 112 |
| Quick hitch frame bolt length 'b' | 2.0 to 3.0 mm (0.079 to 0.11 in.) | p. 112 |
| Control valve mounting bolt (M10) torque | 48 to 55 N·m (4.9 to 5.7 kgf·m, 36 to 41 lbf·ft) | p. 96 |
