1997–2003 JCB 505-19; 505-22, 506-36, 506B, 508-40, 510-40 Telescopic Handler Service Manual (P/N 9803/3600U)

• Exact machine coverage: JCB 505-19, serial 561001-579365; 505-22, 561001-579365; 508-40, 562601-579365; 506-36, 563359-579999; 510-40, 564542-579365; and 506B, 570000-579766. Covers two-stage and three-stage boom machines.
• Hydraulic and boom repair: Includes pump removal and overhaul, control-valve service, pressure testing, lift and displacement rams, extension/tilt/sway/stabilizer cylinders, three-stage boom bleeding, diverter valves, and hose-burst protection.
• Control-system configurations: Covers PlaceAce on the 508-40/510-40, Basic Servo options on the 505-19/505-22, and Servo options on the 506-36/508-40, with sensor, joystick, valve-block, calibration, bench-test, and fault-finding procedures.
• Body and option work: Details boom shimming and wear-pad setup, boom removal, 506B extend/retract chain service, cab and glass removal, Q-Fit carriage work, fuel-tank removal on the 505-19/22 and 506-36, and air-conditioning diagnosis and component replacement.
• Powertrain and running gear: Documents Perkins 1000 Series engine installations, Syncro Shuttle and Powershift transmissions, mechanical and hydraulic four-wheel drive, fixed and sway axles, hub and drive-head overhaul, the limited-slip differential option, brakes, and 2-wheel, 4-wheel, and crab steering.
• Electrical diagnosis and diagrams: Provides IP67 and non-IP67 wiring diagrams, road-light variants, 506B serial-break schematics, harness repair, charging and starting tests, PlaceAce/Servo circuits, and Boom Float/Return to Dig option wiring.
• Document identity: 701-page PDF identified as JCB Service Manual Publication No. 9803/3600U, Issue 16, arranged as Sections 1-12 with a separate Section 4A. Includes model-specific specifications, torque tables, pressure/flow data, capacities, clearances, wear limits, electrical test values, and service-tool references.

Hydraulic, Boom, and Control-System Coverage

The hydraulic chapter separates machine and build configurations rather than applying one circuit to the entire range. It distinguishes 508-40/510-40 pump installations at serial 569293/569294 and pump builds at serial 577458/577459, plus neutral circuits with or without torsion-box cooling, steering filtration, and a priority steering/fan pump. Color-keyed schematics cover each model, including 505-19/22 circuit changes at serial 567217/567218 and 574296. The color system identifies full, reduced, servo, neutral, exhaust, cavitation, and lock-up conditions for circuit tracing.

Repair content includes control-valve removal and internal service, relief-valve testing, cylinder removal and resealing, fan-motor adjustment, diverter-valve service, stabilizer operation, and three-stage boom-extension bleeding. PlaceAce procedures reach the Pulsar solenoid, main spool, boom-angle and extension sensors, attitude sensor, Motion Pac control unit, driver cards, display, joystick, and stabilizer lever. Full-system calibration, attitude/tachometer calibration, Pulsar and driver-card adjustment, functional checks, and fault-finding are included. The Servo section adds valve-section overhaul, joystick and stabilizer-lever bench testing, pressure tests, and model-specific schematics.

A raised boom must be supported with the specified safety strut, and residual pressure must be vented before a hydraulic circuit is opened. The manual also flags several repair traps. Later red boom wear pads must be installed in pairs and shimmed evenly; mixing pad types or miscentering the boom can accelerate scoring and wear. Abrasives can destroy the running clearances in applicable Sundstrand pump bearing blocks and gears. An over-compressed rear-drive-head pinion spacer must be renewed rather than backed off and reused, or bearing preload will be incorrect.

Drivetrain, Axles, Steering, and Electrical Diagnosis

The engine chapter covers Perkins 1000 Series naturally aspirated and turbocharged installations, fuel-system bleeding/priming variants, cooling and induction service, radiator removal, engine removal, and hot-component insulation. It is not a full internal engine overhaul manual; further engine detail and specialized tools are referred to separate Perkins/JCB Engine Manual Publication No. 9806/0100.

Syncro Shuttle and Powershift systems receive separate descriptions, drive paths, fault-finding, removal, internal dismantling and assembly, solenoid identification, torque-converter stall testing, clutch leak testing, and pressure/flow testing. The manual distinguishes early and later reverser units, mechanical and hydraulic four-wheel-drive units, and hydraulic 2/4WD on IP67 machines. Axle coverage includes fixed and sway front axles with proximity-switch setting, dowel and splined hubs, drive heads, axle seals, brake packs, and limited-slip differential service. Brake sections cover parking-brake adjustment/testing, front- and rear-axle bleeding, and single or tandem master cylinders with and without servo assistance. Steering sections separate IP67 and non-IP67 machines and document 2-wheel, 4-wheel, and crab modes, pumps, mode valves, rams, bleeding, and pressure testing.

Electrical content includes test methods, battery and charging checks, starter-circuit diagnosis, connector/harness repair, relay locations, and wiring diagrams with and without road lights. Separate 506B diagrams cover machines through serial 578676 and from serial 578677. The Boom Float/Return to Dig section adds a hydraulic schematic, wiring diagram, relay location, fault finding, switch adjustments, hose-burst solenoid service, and displacement-isolation valve/pressure-switch service.

Specifications, Tools, and Scope

Specifications are organized by model and assembly: approved fluids and capacities, standard and component-specific torque data, hydraulic pressure/flow tests, fan-speed checks, boom clearances and shim tables, axle preload/backlash data, wear limits, brake settings, and electrical values. Representative drawings include model/serial-specific main hydraulic circuits, PlaceAce and Servo hydraulic/electrical circuits, front and rear axle cutaways, IP67/non-IP67 machine wiring diagrams, and Boom Float/Return to Dig layouts.

The service-tools chapter identifies dedicated equipment, including hydraulic pressure-test kit 892/00253, Servo valve-block mandrels 992/11400 and 992/11500 with extractor 992/11600, and transmission end-float tools 990/00083, 892/00295, and 892/00825.

This factory workshop reference supports major diagnosis, adjustment, removal, overhaul, and repair work on the covered 500 Series handlers. The separate engine-manual reference makes the internal engine-repair boundary clear before purchase.