Tired of guessing at pressures and clearances on your telehandler? This 588-page JCB Loadall Service Manual PDF (OEM #9803/3610 Issue 10) breaks down every system on your 520, 526, and 504B series machines, from the 520-55 RS to the 526S AWS. Open the file to find complete wiring diagrams, full hydraulic schematics with smooth ride system routing, and step-by-step syncro shuttle transmission teardowns. You get detailed fault-finding charts for the powershift setup and page after page of exploded views for the main boom assemblies. Lock down the boom wear pad bolts to 55 Nm and tighten the front hub filler plug to exactly 80 Nm before sending the machine back out. Don't waste another hour chasing electrical ghosts. Grab this bookmarked download, open it on your shop tablet, and get the repair done right.
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| General Information | 1-30 | Service Tools |
| Care & Safety | 31-37 | Safety Notices, General Safety, Operating Safety, Maintenance Safety, Lubricants - Health and Safety |
| Routine Maintenance | 38-52 | Lubricants and Capacities, Service Schedules |
| Attachments | 53-86 | Grease, Engine Air Filter, Engine Cooling System, Fuel System |
| Body & Framework | 87-115 | Cab Direct Glazing |
| Electrics | 116-204 | Technical Data, Test Methods, Schematics, Description Wire Harness Numbers, Batteries Warning Symbols, Alternator Precautions, Starter Motor Starter Circuit Test |
| Controls | 205-206 | |
| Hydraulics | 207-275 | Schematic Circuit, Descriptions Basic Machine Neutral Circuit, Smooth Ride System, Fault Finding Contents, Pump Main Pump Removal & Replacement |
| Transmission | 276-506 | Technical Data, Descriptions General Description, Fault Finding Syncro Shuttle, Fault Finding Powershift, Syncro Shuttle Overhaul, Powershift Overhaul |
| Brakes | 507-545 | Descriptions Compensating Master Cylinder, Fault Finding Probable Causes Action, Accumulator Charge Valve Removal & Replacement |
| Steering | 546-579 | Descriptions Steer Valve Operation Neutral, Descriptions Priority Valve Operation Neutral, Descriptions Steer System Left Turn, Fault Finding Contents |
| Engine | 580-588 | Identification, Torque Settings, Service Tools (Numerical List, Section B, Section C, Section E, Section F, Section H, Section K), Sealing and Retaining Compounds |
Documents This Manual Refers To
The manufacturer cites these publications by number. We carry them:
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Front Hub Filler/Drain Plug Torque | 80 Nm (8.0 Kgf. m, 60 lbf. ft) | p. 437 |
| Front Hub Planet Carrier Screws Torque | 25 Nm (2.5 Kgf. m, 18.5 lbf. ft) | p. 437 |
| Boom Wear Pad Bolts Torque | 55 Nm (5.5 Kgf. m, 40 lbf. ft) | p. 101 |
| UNF Grade 'S' Bolts Torque Settings | Various values from 14 Nm (1.4 kgf m, 10 lbf ft) to 3390 Nm (345.0 kgf m, 2500 lbf ft) | p. 7 |
| Metric Grade 8.8 Bolts Torque Settings | Various values from 7 Nm (0.7 kgf m, 5 lbf ft) to 2854 Nm (291 kgf m, 2105 lbf ft) | p. 7 |
| Front Hub Taper Bearings Clearance | Do not require pre-load or clearance checks | p. 437 |
| Brake Discs Wear Limit | Less than 3.8 mm (0.15 in.) thick | p. 441 |
| Front Wheel Shaft Carrier Bolts Torque (Grade 8.8) | 156 Nm (15.8 Kgf. m, 114.8 lbf. ft) | p. 441 |
| Priority Valve Connector Torque | 103 Nm (10 Kgf. m, 76 lbf. ft) | p. 577 |
| Exhaust Components Torque | No specific torque or clearance values are given for exhaust components. General Metric Grade 8.8 bolt torque settings apply. | p. 585 |
| Wear Pad Clearance | Not exceed a total of 1.5 mm (0.05 in) from side to side or top to bottom | p. 101 |
