Doosan B15/18/20T-7, B18/20TL-7, B16/18/20X-7 PLUS Electric Forklift Service Manual – SB4449E05

Description

The Doosan B15/18/20T-7, B18/20TL-7, B16/18/20X-7 PLUS Electric Forklift Service Manual – SB4449E05 is the full workshop reference for Doosan’s 7-series AC electric counterbalance trucks. It covers the T-series chassis (B15T-7, B18T-7, B20T-7), the long-wheelbase TL variants (B18TL-7, B20TL-7), the compact X-series (B16X-7, B18X-7, B20X-7) and every PLUS derivative of those platforms. Systems are split into nine numbered chapters, each written as a stand-alone service section with illustrations, circuit diagrams, exploded views, torque data and step-by-step disassembly and assembly procedures.

File Details

• Manual type: Service Manual (workshop / repair)
• Brand: Doosan – Doosan Industrial Vehicle Co., Ltd.
• Document number: SB4449E05
• Covered models: B15T-7, B18T-7, B20T-7, B18TL-7, B20TL-7, B15T-7 PLUS, B18T-7 PLUS, B20T-7 PLUS, B16X-7, B18X-7, B20X-7, B16X-7 PLUS, B18X-7 PLUS, B20X-7 PLUS
• Language: English
• Page count: 559
• File format: PDF
• Publication date: November 2017, with later revisions reflected in the revision history

Chapters Covered

• 1 – General: how to use the manual, warning label definitions, glossary, exterior views and specifications for each model group, safety precautions, maintenance intervals, lubricants and capacities, greasing points, disassembly/assembly instructions, standard torques for bolts, nuts and fittings
• 2 – Electrical System: component overview, CAN communication protocol, battery exterior/specifications, functions, wiring, test, maintenance, removal and installation; controllers and related devices; fuse box, DC-DC converter, lamp group, OSS controller, horn, optional speed limit; instrument panel display, buttons, diagnosis and calibration; EasyView application installation, controller firmware update, administration and tools menus, test menu, calibration menu, initial settings; handling faults on instrument panel and EasyView
• 3 – Drive/Brake System: drive motor exterior and operation, motor/axle/EM brake removal and installation, motor disassembly, assembly and test, drive wheel removal; drive axle specifications, driving and braking function, drive axle oil replacement, adjustment, disassembly and assembly; accelerator; F/R unit; service brake pedal assembly, brake pedal adjustment, air removal in brake oil, master cylinder disassembly and assembly; Electric Foot Brake (EFB) specifications, operation, pedal removal and adjustment; EM parking brake, parking brake test, manual release of braking; driving, service brake and EM parking brake troubleshooting
• 4 – Hydraulic System: components and oil flow, pump motor exterior and operation, pump motor and main hydraulic pump removal and installation, pump motor disassembly, assembly and test, main hydraulic pump construction and servicing, priority valve operation, disassembly and assembly, hydraulic tank and filter, hydraulic oil and filter replacement, troubleshooting
• 5 – Lift/Tilt/Aux System: control valve sections (inlet, lift, tilt, auxiliary, outlet, valve control board), relief valve adjustment, needle valve for emergent lowering, lever and switch group adjustment, control valve removal, disassembly and assembly; STD/FFL/FFT mast construction and lift operation; forks, sideshifter, chains, tilt cylinder, primary lift cylinder, standard/secondary lift cylinder, carriage and mast service; Quad mast primary and standard cylinder service; GSS and auto-tilt leveling options including height switch, mast tilt/auto-tilt switch and hydraulic block assembly; troubleshooting
• 6 – Steering System: components and oil flow, steering control group exterior and operation, steering system air removal and pressure check, steering wheel cover, steering wheel and column removal, steering unit disassembly and assembly; steering operation group for B15/18/20T (TL) including steer angle sensor, rear wheel and hub adjustment, steer axle spindle and housing assembly; steering operation group for B16/18/20X including steer axle, link assembly, steering knuckle, king pin, bearings and steering cylinder; troubleshooting
• 7 – Frame: hood, overhead guard, floor plates, top cover and counterweight removal and installation, modular cabin types A, B and C with cabin electric schematic, heater exterior, specifications, operating conditions and modes, maintenance information and troubleshooting
• 8 – Fingertip Option: overview and circuit, fingertip extension module, fingertip armrest unit wiring, hydraulic control knobs, forward/reverse switch, removal, disassembly and assembly; Kayaba control valve (to July 2018) and Walvoil control valve (July 2018 onward) including relief valve adjustments and manual lowering; steering pressure switch assembly and pump motor operation at steering; fault diagnosis and troubleshooting
• 9 – Schematics: hydraulic schematic, hydraulic schematic for fingertip with Kayaba valve, hydraulic schematic for fingertip with Walvoil valve, electrical schematic for master cylinder brake models and electrical schematic for Electric Foot Brake models

Taken as a whole, this Doosan electric forklift service manual gives a technician the complete service picture for the 7-series platform rather than a single isolated subsystem. Electrical diagnostics, controller calibration and CAN fault handling sit alongside mechanical teardown of the drive axle, the hydraulic control valve and every mast configuration, so a fault that starts as an error code on the instrument panel can be traced all the way through to the component that caused it. The model-specific specification tables at the front let you confirm capacities, pressures, torques and adjustment limits for the exact truck in front of you before any fastener is loosened.

What You Can Do With This Manual

Because the manual separates the vehicle into its real systems, it supports both scheduled service and full repair work on Doosan B15/18/20T-7, B18/20TL-7, B16/18/20X-7 and PLUS electric forklifts. Typical jobs the procedures directly cover include replacing a drive motor, axle or EM brake; rebuilding a drive axle including carrier, ring gear, drive shaft and wet disc brake assemblies; servicing the master cylinder or the Electric Foot Brake sensor and pedal adjustment; tearing down and resealing the main hydraulic pump and priority valve; adjusting main, tilt-forward and secondary relief pressures; rebuilding tilt, primary, standard, secondary and Quad mast cylinders; chain wear and tension measurement; carriage roller and mast roller shimming; steering unit, steer axle and steering cylinder overhaul; and diagnosing controller, encoder, thermal sensor, CAN, solenoid and fingertip faults through the instrument panel or the EasyView software.

Specifications and Procedures That Keep the Truck Right

Electric forklifts are unforgiving of guessed values. The manual supplies the reference figures that decide whether a repair is correct: drive motor and pump motor ratings, encoder pulse counts, thermal sensor resistance, controller operating limits and current draw, line contactor coil resistance, brake and hydraulic pressures, chain wear percentages, drift limits for tilt and lift cylinders, rolling torque for the drive axle, cylinder rod extension limits and the standard torque tables for metric and inch fasteners and for every fitting type used on the truck. It also documents the initial setting procedures for the accelerator, lift sensor, steering angle sensor and brake pedal, which must be re-performed whenever those components or the controller firmware change.

Illustrations, Diagrams and Fault Coverage

Exploded component views show how assemblies go together and come apart, hydraulic schematics show oil flow through the priority valve and control valve in neutral, lift, lower, tilt and auxiliary positions, and the electrical schematics at the end of the manual trace the full harness for both master cylinder brake and Electric Foot Brake trucks. A dedicated fault chapter lists instrument panel fault codes with fault level, probable cause and the checks to run for contactor faults, encoder faults, thermal sensor faults, EM brake faults, CAN communication faults, over-temperature conditions, solenoid faults and fingertip option faults.

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Whether you maintain a mixed fleet of T, TL, X and PLUS trucks or you are rebuilding a single machine, having the Doosan B15/18/20T-7, B18/20TL-7, B16/18/20X-7 PLUS Electric Forklift Service Manual – SB4449E05 on hand means you work to Doosan’s own procedures and specification values instead of estimating them. Every disassembly step, torque figure, pressure setting and fault-code diagnosis in this PDF exists so the truck goes back into service correctly and stays there. The manual is delivered as an instant PDF download after payment – no shipping, no waiting, and you can open it on a laptop, tablet or phone in the workshop or print the pages you need for the job.