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

JCB Service Manual P/N 9803/3600U, Issue 16 covers the 505-19, 505-22, 506-36, 506B, 508-40, and 510-40 telescopic handlers, including two-stage and three-stage boom machines. It is organized into Sections 1–12, with a separate Servo Control System section, 4A.

PDF Reading and Navigation

Text search and diagram detail: PDF text search and embedded bookmarks are not available. Small wiring, pin, and connector labels require zooming.

One printable, English-language PDF contains 701 pages, including the original cover and one repeated hydraulic-steering assembly page.

Boom Hydraulics, Controls, and Drivetrain Repair

The following selected service topics outline the manual’s coverage; other included work covers machine recovery and air-filter replacement.

• Hydraulic repair: Pump removal and resealing, control-valve service, pressure testing, cylinder repair, three-stage boom bleeding, diverter valves, and hose-burst protection.

• Control systems: PlaceAce calibration and fault finding, Basic Servo and Servo valve-block service, sensor checks, and joystick and stabilizer-control testing.

• Boom, cab, and options: Boom shimming, wear-pad setup, 506B extend/retract chains, Q-Fit carriage work, cab and glass replacement, and air-conditioning service.

• Engine and transmission: Perkins installation service and engine removal, plus Syncro Shuttle and Powershift dismantling, assembly, clutch-leak checks, stall testing, and pressure/flow testing.

• Axles, brakes, and steering: Hub and drive-head overhaul, limited-slip differential service, brake packs, master cylinders, steering-unit repair, bleeding, and steering-mode circuits.

• Electrical diagnosis: Battery and charging tests, starter-circuit diagnosis, harness repair, IP67/non-IP67 wiring diagrams, and PlaceAce, Servo, and Boom Float/Return to Dig circuits.

• Maintenance and specifications: Service schedules, greasing and oiling points, approved fluids, capacities, torque tables, wear limits, electrical test values, and service-tool references.

Written for JCB distributor service engineers receiving or having completed JCB technical training, this manual assumes sound workshop knowledge and generally omits basic repair techniques.

Hydraulic Circuits and Cylinder Service

This factory workshop reference supports major diagnosis, adjustment, removal, overhaul, and repair work on the covered 500 Series handlers. Model- and serial-specific circuits help distinguish configurations before parts or test procedures are selected.

The hydraulic chapter separates 508-40/510-40 pump installations at serial 569293/569294 and pump service versions at 577458/577459. Neutral-circuit descriptions distinguish torsion-box cooling, steering filtration, and priority steering/fan-pump arrangements.

Color-keyed schematics identify full, reduced, servo, neutral, exhaust, cavitation, and lock-up conditions. The 505-19/505-22 circuits distinguish machines through serial 567217, from 567218, and from 574296.

Cylinder procedures cover lift, displacement, extension, tilt, sway, and stabilizer assemblies, with fan-motor adjustment and three-stage extension-circuit bleeding. Pump instructions distinguish resealing from replacement when output is inadequate; abrasives can destroy critical Sundstrand bearing-block and gear clearances.

A raised boom must be supported with the specified safety strut, and residual hydraulic pressure must be vented before a circuit is opened.

PlaceAce and Servo Controls

PlaceAce coverage reaches the Pulsar solenoids, main spools, boom-angle and extension sensors, attitude sensor, Motion Pac control unit, driver cards, display, joystick, and stabilizer lever.

Full-system, attitude/tachometer, and Pulsar calibration procedures are included, together with driver-card adjustment and functional checks. Fault-finding charts trace symptoms to individual controls, sensors, wiring, or hydraulic components.

The Servo section adds valve-section dismantling and assembly, joystick and stabilizer-lever bench tests, pressure checks, and model-specific hydraulic and electrical schematics.

Boom Structure, Cab, and Air Conditioning

Step-by-step instructions cover boom removal and replacement, with model-specific shim and washer tables. Later red wear pads require paired installation and even shimming; incorrect centering can cause scoring and accelerated wear.

The 506B chain procedures include replacement, adjustment, wear inspection, and roller checks. Body work also covers Q-Fit carriage removal, cab glazing, and fuel-tank removal on the 505-19/505-22 and 506-36.

Air-conditioning coverage includes fault finding, leak testing, and component replacement. Refrigerant charging and discharging procedures are not included; work that opens the refrigerant circuit requires a qualified refrigeration engineer.

Engine Installations and Transmission Overhaul

The engine chapter covers Perkins 1000 Series naturally aspirated and turbocharged installations, conventional and self-bleeding fuel systems, cooling and induction service, radiator removal, engine removal, and hot-component insulation.

Full internal engine overhaul is outside this manual’s scope. Further engine details and specialized tools are referred to separate Engine Manual Publication No. 9806/0100, which is not included.

Syncro Shuttle and Powershift receive separate operating descriptions, drive paths, fault-finding sections, and internal repair procedures. Coverage distinguishes earlier and later reverser units, mechanical and hydraulic four-wheel-drive units, and hydraulic 2/4WD on IP67 machines. Solenoid identification, torque-converter stall testing, clutch-leak testing, and pressure/flow checks support transmission diagnosis.

Axles, Brakes, and Steering

Axle procedures cover fixed and sway front axles, proximity-switch settings, dowel and splined hubs, axle seals, drive heads, brake packs, and the limited-slip differential option. An over-compressed rear-drive-head pinion spacer must be renewed to obtain the correct bearing preload.

Brake coverage includes parking-brake adjustment and testing, front- and rear-axle bleeding, and single or tandem master-cylinder arrangements with and without servo assistance. Master cylinders can be resealed; defective servo units are replaced.

Steering sections distinguish IP67 and non-IP67 machines and explain 2-wheel, 4-wheel, and crab modes. Danfoss Orbitrol unit repair, mode valves, pumps, rams, bleeding, and pressure testing are included.

Wiring and Boom Float/Return to Dig

Electrical drawings cover machines with and without road lights, supported by component keys, wire-identification tables, relay locations, and harness-repair instructions. Separate 506B Syncro Shuttle diagrams apply through serial 578676 and from 578677.

IP67 wiring information is included, but Section 10 does not provide a dedicated IP67 fault-finding section.

The Boom Float/Return to Dig option has its own hydraulic schematic, wiring diagram, relay layout, fault table, and switch adjustments. It also covers hose-burst solenoids and the displacement-isolation valve/pressure switch. These boom features are described for bucket/shovel use.

Service Tools and Workshop Reference Data

Specifications include component torque settings, hydraulic pressure/flow data, fan-speed checks, boom shim tables, axle preload/backlash settings, brake adjustments, and electrical values.

Tool references include hydraulic pressure-test kit 892/00253; Servo sleeve-removal tool 992/11400, mandrel 992/11500, and extractor 992/11600; and transmission end-float tools 990/00083, 892/00295, and 892/00825.

Boom Clearance and Chain-Wear Examples

For 505-19/505-22 boom shimming, maximum vertical clearance is 3.0 mm at the front and 1.5 mm at the rear.

For the 506B’s 19 mm-pitch boom chains, the inspection table specifies a maximum measured length of 485 mm over 25 links under an 800 N checking load.