Komatsu BX50 Series Forklift Service Manual 2014 – SM160 BEB16E1-06 PDF

Description

Komatsu BX50 Series Forklift Service Manual – SM160 BEB16E1-06

This is the Komatsu BX50 Series Forklift Service Manual, document number SM160 BEB16E1-06, published in 2014. It is a comprehensive workshop-level service publication covering the complete BX50 Series forklift truck range from 2.0-ton to 3.5-ton capacity, including gasoline, LPG, dual fuel, and diesel configurations across EPA Tier 1, EPA Tier 2, EPA Interim Tier 4, and CARB 2010 emissions standards. Whether you are servicing a FG20T-16, FD30T-16, FG35AHT-16, or any other BX50 variant, this manual provides the procedures, specifications, and system-level detail needed to diagnose, repair, and maintain these trucks correctly.

File Details

• Manual Type: Service Manual (Workshop Repair Manual)
• Document Number: SM160 BEB16E1-06
• Publication Date: 2014 (June 2014 revision)
• Brand: Komatsu Forklift U.S.A., LLC
• Model Series: BX50 Series Forklift Trucks
• Language: English
• Page Count: 568 pages
• File Format: PDF
• Models Covered: FG20/25/28/30/32(S)(H)T-16, FG35AHT-16, FD20/25/28/30/32T-16, FD35AT-16
• Engines Covered: K21, K25 (gasoline/LPG), 4D94LE, 4D98E (diesel)
• Serial Number Ranges: 200001A~, 210001A~, 750875-751862, A224001~, 751863~, A223001~, and model-specific ranges

Chapters Covered

• 1. Safety – Basic precautions, fire prevention, safety checks before starting, safe travel, stopping/parking/towing, loading operations, safety in inspection and maintenance, towing, structure and stability of the lift truck, safety labels, optional equipment
• 2. Specifications and General Information – General assembly diagram, lubricant list (gasoline/LPG and diesel models), periodic replacement of consumable parts, specifications by model (2-ton through 3.5-ton pneumatic and cushion), weight tables, standard tightening torque for bolts and nuts, standard tightening torque for pipe joints
• 3. Operator Compartment – Structure and function, vehicle controller, Komatsu Operator Presence System (KOPS), controller troubleshooting, ISO controller troubleshooting chart, periodic inspection and maintenance check points, testing and adjusting (inching/brake pedal, stop lamp switch, accelerator pedal, parking brake lever, combination switch), removal and installation of parking brake cable
• 4. Engine – Structure and function, periodic inspection and maintenance check points, testing and adjusting (gasoline and diesel engines, air cleaner, ignition timing, fuel injection timing, no-load rotating speed, compression pressure, cylinder head bolt torque, valve clearance), removal and installation, disassembly and assembly, maintenance standard
• 5. Torque Converter – Structure and function, gear pump, torque converter assembly, hydraulic circulating route, periodic inspection and maintenance, testing and adjusting, removal and installation, disassembly and assembly, maintenance standard
• 6. Torqflow Transmission – Structure and function, periodic inspection and maintenance, testing and adjusting, removal and installation, disassembly and assembly, solenoid valve disassembly and assembly, maintenance standard
• 7. Drive Axle – Structure and function, periodic inspection and maintenance (differential, front axle, tires, wheel, brake piping, oil brake, brake booster, brake shoe lining, brake drum, back plate, parking brake drum/lining), testing and adjusting, removal and installation, disassembly and assembly, maintenance standard
• 8. Steering System – Structure and function, steering hydraulic circuit diagrams, steering valve components, steering axle and power steering torques, periodic inspection and maintenance, testing and adjusting, troubleshooting steering problems, removal and installation, disassembly and assembly, maintenance standard
• 9. Wheel Brake – Structure and function, wheel brake, brake booster, brake master cylinder, periodic inspection and maintenance, testing and adjusting, removal and installation, disassembly and assembly, maintenance standard
• 10. Hydraulic System – Structure and function, hydraulic circuit diagrams, periodic inspection and maintenance, testing and adjusting, removal and installation, disassembly and assembly (flow divider, hydraulic pump), hydraulic pump maintenance standard
• 11. Work Equipment – Structure and function (tilt cylinder, piston section), periodic inspection and maintenance, removal and installation (mast, lift cylinder), disassembly and assembly (lift cylinder, tilt cylinder, control valve, cylinder seal service kits, sideshifter), maintenance standard
• 12. Masts – E-MS Series Limited Free Lift 2-Stage Mast, E-MD Series Full Free Lift 2-Stage Mast, E-MT Series Full Free Lift 3-Stage Mast, 35D/45D/55D MQ Quad Masts – each with introduction, installation instructions, periodic maintenance, troubleshooting, and service procedures
• 13. Conversion Tables – Millimeters to inches, inches to millimeters, cubic meters to cubic yards, cubic yards to cubic meters, liters to U.S. gallons, U.S. gallons to liters, liters to U.K. gallons, U.K. gallons to liters, kilograms to pounds, pounds to kilograms, kg/cm² to lb/in², kgm to ft. lb, temperature (Fahrenheit/Centigrade)
• Electrical Diagrams – BX50 Tier 2 Diesel (4D94LE), Interim Tier 4 Diesel (4D98E), Tier 1 Gasoline (K21/K25), Tier 2 Gasoline, Tier 1 LPG, Tier 2 LPG, CARB 2010 LPG, CARB 2010 LPG with New KOPS, Tier 1 LPS, Tier 2 LPS, Tier 1 Dual Fuel, Tier 2 Dual Fuel, CARB 2010 Dual Fuel, and CARB 2010 Dual Fuel with New KOPS – with serial number break identification

What This Service Manual Gives You

This Komatsu BX50 Series service manual is not a generic overview. It is the full workshop document that Komatsu Forklift U.S.A. produced for its dealer and service network, covering every major system on the truck with the same procedures and specifications used in professional repair environments. The opening safety chapter establishes the operating and maintenance protocols that apply across the entire BX50 range, while the specifications chapter provides the baseline torque values, fluid capacities, and model-specific data needed before any repair begins.

From there, the manual moves system by system through the truck. The engine chapter covers both the K21/K25 gasoline and LPG engines and the 4D94LE/4D98E diesel engines, with valve clearance adjustment, compression testing, ignition timing, fuel injection timing, and cylinder head torque sequences. The torque converter and Torqflow transmission chapters provide disassembly, assembly, and hydraulic pressure testing procedures that are specific to the BX50’s drivetrain configuration. The drive axle and wheel brake sections cover the front axle, differential, brake booster, master cylinder, and parking brake with inspection criteria and adjustment procedures.

The steering system chapter includes the steering valve, power steering cylinder, and steering axle with troubleshooting guidance for common steering problems. The hydraulic system chapter covers the hydraulic pump, flow divider, and circuit diagrams for both power brake and standard brake models. The work equipment chapter addresses lift cylinders, tilt cylinders, control valves, and the sideshifter, while the mast chapter provides dedicated service information for the E-MS, E-MD, E-MT, and 35D/45D/55D MQ Quad mast series. The electrical diagrams appendix covers every BX50 variant with serial number break identification so you can match the correct wiring schematic to your specific truck.

Because the BX50 Series spans multiple emissions tiers and fuel types, the manual is organized to help you locate the correct procedure for your particular configuration. Serial number ranges are clearly identified throughout, and the electrical diagrams are separated by engine type and emissions standard. This means you are not left guessing which specification applies to your truck – the manual tells you.

Who This Manual Is For

This Komatsu BX50 forklift service manual is written for professional forklift technicians, fleet maintenance managers, and repair shops that service Komatsu BX50 Series trucks. It is also useful for knowledgeable owner-operators who perform their own maintenance and want access to the same procedures and specifications that a dealer service department would use. The level of detail assumes a basic understanding of forklift systems and safe workshop practices, but the step-by-step procedures and clear specifications make it accessible to anyone with mechanical experience.

Why This Manual Matters

Forklift repair without the correct specifications is guesswork. Torque values, clearances, pressure settings, and adjustment procedures vary by model and configuration. Using the wrong specification can lead to premature failure, unsafe operation, or damage to components that are expensive to replace. This manual provides the exact values and procedures that Komatsu specifies for the BX50 Series, so you can complete repairs correctly the first time and maintain the truck to the standard it was designed for.

The troubleshooting sections are particularly valuable. Rather than replacing parts until something works, you can follow the diagnostic flow charts and symptom-based guidance to identify the actual cause of a problem. For example, the steering troubleshooting table in Chapter 8 lists specific symptoms like slow steering, wander, drift, and free wheeling, along with possible causes and corrective actions. This kind of structured diagnosis saves time and money.

What You Can Do With This Manual

• Perform complete engine service on K21, K25, 4D94LE, and 4D98E engines, including valve clearance adjustment, compression testing, and cylinder head bolt torquing
• Diagnose and repair torque converter and Torqflow transmission issues, including solenoid valve service and hydraulic pressure testing
• Service the drive axle, differential, and wheel brakes, including brake shoe adjustment, master cylinder rebuild, and parking brake cable replacement
• Troubleshoot and repair steering system problems using the structured troubleshooting tables
• Overhaul hydraulic system components including the hydraulic pump and flow divider
• Service work equipment cylinders, control valves, and sideshifters
• Maintain and repair E-MS, E-MD, E-MT, and 35D/45D/55D MQ Quad masts
• Reference the correct electrical diagram for your specific BX50 model and serial number range
• Look up standard tightening torques for bolts, nuts, and pipe joints
• Identify the correct lubricants and capacities for gasoline, LPG, dual fuel, and diesel models

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Instant PDF Delivery

The Komatsu BX50 Series Forklift Service Manual SM160 BEB16E1-06 is delivered as a PDF download immediately after purchase. There is no shipping, no waiting for a physical book, and no need to worry about a paper manual getting lost or damaged in the shop. You can access the manual on any device – laptop, tablet, or smartphone – and print the pages you need for the job at hand. Whether you are working on a single repair or maintaining an entire fleet, having the manual available instantly means you can start the job right away.