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Hyster A274 (H50CT) Forklift Service Manual

1,867 pages · Publication A274

$189.73
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Models
A274 (H50CT)
Manual type
Service Manual
Pages
1,867
Publication
A274
Condition
Brand new
Hyster A274 (H50CT) Forklift Service Manual, publication A274

What's inside

From the manual's own table of contents: 159 sections, 510 entries. See sample pages (PDF, 315 KB)

Mazda Engine
Safety Precautions Maintenance and Repair
General1 topic
  • Serial Number
Engine Removal and Installation
Cylinder Head, Camshaft, and Valve Mechanism Repair4 topics
  • Remove
  • Clean
  • Inspect and Repair
  • Install
Crankshaft and Main Bearings Repair
Pistons and Connecting Rods Repair2 topics
  • Remove and Disassemble
  • Assemble and Install
Cylinder Block Repair
Oil Pump Repair3 topics
  • Disassemble
  • Inspect
  • Assemble
Cooling System Repair3 topics
  • Thermostat
  • Fan Assembly
  • Water Pump
Flywheel and Ring Gear Repair
Valve Adjustment
Compression Pressure Check
Engine Timing Adjustment
Engine Specifications10 topics
  • Engine Data
  • Engine Speeds
  • Cylinder Head
  • Valve Mechanism
  • Camshaft
  • Crankshaft
  • Connecting Rods
  • Cylinder Block
  • Pistons
  • Oil Pump
Torque Specifications
Table 1. Pressure Specifications
Cooling System
Cooling System Checks3 topics
  • Exhaust Leaks Into Cooling System
  • Water Flow Restrictions in Radiator
  • Radiator Hoses
Flushing the Cooling System1 topic
  • Cooling System, Clean
Radiator Replacement6 topics
  • Radiator, Remove for Lift Trucks Models S30FT, S35FT, S40FTS (E0
  • Radiator, Remove for Lift Truck Models S6.0FT, S7.0FT (S135FT, S
  • Radiator, Remove for Lift Truck Models H6.0FT, H7.0FT (H135FT, H
  • Radiator, Install for Lift Truck Models S30FT, S35FT, S40FTS (E0
  • Radiator, Install for Lift Truck Models S6.0FT, S7.0FT (S135FT
  • Radiator, Install for Lift Truck Models H6.0FT, H7.0FT (H135FT
Fan Assembly Replacement2 topics
  • Fan Removal
  • Fan Installation
Brake System2 topics
  • Dry Brake System
  • Wet Brake System
Service Brakes Repair (Dry Brake)2 topics
  • Adjust
  • Inching Overlap Adjustment
Show all 159 sections
Parking Brake Repair
Master Cylinder Repair11 topics
  • Remove (Dry Brake)
  • Disassemble (Dry Brake)
  • Clean and Inspect (Dry Brake)
  • Assemble (Dry Brake)
  • Bench Bleed Master Cylinder (Dry Brake)
  • Install and Adjust (Dry Brake)
  • Remove (Wet Brake)
  • Disassemble (Wet Brake)
  • Clean and Inspect (Wet Brake)
  • Assemble (Wet Brake)
  • Install and Adjust (Wet Brake)
Service Brakes Adjustment (Dry Brake)
Brake System Air Removal2 topics
  • Using Pressure Bleed System
  • Using Brake Pedal Pressure
Brake Pedal Adjustment
Free Pedal Adjustment
LPG Fuel System
LPG Tank and Bracket Replacement10 topics
  • Remove LPG Tank for Lift Truck Models S30FT, S35FT, S40FTS (E010
  • Install LPG Tank for Lift Truck Models S30FT, S35FT, S40FTS (E01
  • Remove LPG Tank for Lift Truck Models S50CT (A267) and H2.0-2.5C
  • LPG Tank Install for Lift Truck Models S50CT (A267) and H2.0-2.5
  • Remove LPG Bracket for Lift Truck Models S30FT, S35FT, S40FTS (E
  • Install LPG Bracket for Lift Truck Models S30FT, S35FT, S40FTS (
  • Remove LPG Tank Bracket Alignment Pin, Lift Truck Models S30FT
  • Install LPG Tank Bracket Alignment Pin, Lift Truck Models S30FT
  • Remove LPG Bracket for Lift Truck Models S50CT (A267) and H2.0-2
  • Install LPG Bracket for Lift Truck Models S50CT (A267) and H2.0
Fuel Filter Unit Repair2 topics
  • Fuel Filter Element
  • Fuel Filter Housing
Electronic Throttle Body Repair
Electronic Pressure Regulator (EPR) Repair
LPG Shutoff Valve Assembly
Fuel Mixer Repair
Control System3 topics
  • Engine Control Unit (ECU)
  • Low LPG Pressure Switch
  • LPG Low Level Sensor
Exhaust System5 topics
  • Counterweight Exhaust System
  • Overhead Exhaust System
  • Exhaust Manifold
  • Positive Crankcase Ventilation (PCV) Valve
  • Oxygen Sensor
Table 1. PCV Valve Specifications
Electrical System
Ignition System4 topics
  • General
  • Ignition Timing Adjustment, Gasoline and LPG
  • Spark Plugs Check
  • Spark Plug Wires Check
Coil Replacement
Starter Repair2 topics
  • No-Load Test
  • Magnetic Switch Test
Alternator Repair3 topics
  • Charging System Inspection
  • Output Current Check
  • No-Load Adjusted Voltage Check
Engine Sensors and Switches8 topics
  • Oil Pressure Sensor, Gas and LPG Engines
  • Air Filter Restriction Switch, Gas and LPG Engines
  • Cam Angle Sensor, Gas and LPG Engines
  • Manifold Absolute Pressure (MAP) Sensor, Gas and LPG Engines
  • Intake Air Temperature (IAT) Sensor, LPG Engines
  • Intake Air Temperature (IAT) Sensor, Gas Engines
  • Fuel Temperature Sensor, LPG Engines
  • Engine Coolant Temperature (ECT) Sensor
Table 1. Spark Plug Wires
Table 2. Coil Inspection
Table 3. Starter Specifications
Table 4. Problem Diagnosis Chart
Table 5. Specifications - 2007 Emissions Compliant Engines
Table 6. Specifications - Lift Trucks Built After January, 2010
Table 7. Rectifier Check Table - 2007 Emissions Compliant Engine
Table 8. Rectifier Check Table - Lift Trucks Built After January
Single Speed PowerShift
Hydraulic Gear Pump
Charge Pump Repair2 topics
  • Original Charge Pump
  • New Charge Pump, Manufactured After July, 2013
Torque Converter Replacement1 topic
  • Clean and Inspect
Stator Support Assembly Repair
Clutch Packs Repair
Proportional and Enable Solenoid Valves2 topics
  • Proportional Valves
  • Enable Solenoid Valve
MONOTROL® Pedal Repair1 topic
  • Remove and Disassembly
Frame
Hood, Seat, and Side Covers Replacement
Steering Column2 topics
  • Description
  • Steering Column Repair
Counterweight Replacement
Overhead Guard Replacement
Operator Restraint System Replacement
Engine Replacement
Transmission Replacement
Throttle Pedal and Cable Adjustment3 topics
  • Mazda LPG Engine
  • Yanmar Diesel Engine
  • Yanmar Diesel Engine With Electronic Throttle
Hydraulic Filter Repair
Tank Repair6 topics
  • LPG Tank Repair
  • Hydraulic and Diesel Tanks
  • Additional Preparations for Repair
  • Small Leaks, Repair
  • Large Leaks, Repair
  • Preparations for Use After Repair
Label Replacement
Table 1. Weight of Counterweights
Drive Axle and Differential Assembly Repair1 topic
  • Identification Plate
Drive Axle Repair
Differential Repair
Table 1. Pinion Variation Numbers Examples
Table 2. Ring and Pinion Tooth Contact Adjustment
Table 3. Correct Tooth Contact
Table 4. Incorrect Tooth Contact
Steering Axle
Steering Axle Assembly Repair
Spindles, Bearings, and Tie Rods Repair2 topics
  • Spindles and Bearings
  • Tie Rods
Steering Cylinder Repair
Engine Control Module (ECM), Yanmar Diesel Engine
Display Switch Cluster3 topics
  • Direction Control Lever
  • Key Switch
  • Display Switch Cluster Panel Bezel and Overlay
Steering Column Repair
Sensors and Switches10 topics
  • Accelerator Pedal Position Sensor
  • Brake Fluid Level Switch
  • Brake Pedal Position Sensor
  • Parking Brake Position Sensor
  • Seat Sensor (Operator Presence System)
  • Transmission Pressure Sensors (Transducers)
  • Transmission Temperature Sensor
  • Rear Horn Button Switch
  • Engine and Fuel Sensors and Switches, Mazda 2.0L LPG Trucks
  • Engine and Fuel Sensors, Yanmar 2.6L Diesel Trucks
Power Distribution Module (PDM) and Component Parts2 topics
  • Power Distribution Module (PDM) as a Unit
  • Power Distribution Module (PDM) Components
Battery
Lights4 topics
  • Work Lights (Front and Rear)
  • Strobe Light
  • LED Tail, Backup, and Brake Lights
  • Reflectors
Periodic Maintenance4 topics
  • Serial Number Data
  • How to Move Disabled Lift Truck
  • How to Put Lift Truck on Blocks
  • How to Clean a Lift Truck
Maintenance Schedule
Maintenance Procedures Every 8 Hours or Daily2 topics
  • How to Make Checks With Engine Stopped
  • How To Make Checks With Engine Running
First Service After First 100 Hours of Operation3 topics
  • Mazda 2.0L and 2.2L Engine Oil and Oil Filter Change
  • Yanmar 2.6L Engine Oil and Oil Filter Change
  • Hydraulic System
Maintenance Procedures Every 250 Hours or 6 Months2 topics
  • Mazda 2.0L and 2.2L Engine Drive Belt Check
  • Drain Tar From Electronic Pressure Regulator (EPR)
Maintenance Procedures Every 500 Hours or 6 Months18 topics
  • Hydraulic System Oil
  • Hydraulic Tank Breather
  • Battery
  • Yanmar 2.6L Engine Drive Belt
  • PCV Valve
  • Clean Debris From Radiator Core
  • Transmission Oil Level
  • Forks
  • Mast Lubrication
  • Header Hose Checks
  • Lift Chain Lubrication
  • Tilt Cylinder Lubrication
  • Master Cylinder Rod End Pin Lubrication
  • Manual Hydraulic Levers Lubrication
  • Brake Fluid
  • Parking Brake Adjustment
  • Tie Rod Lubrication
  • Differential and Drive Axle Oil
Maintenance Procedures Every 1000 Hours or 6 Months9 topics
  • Valve Clearance, Check and Adjust
  • Ignition System - Mazda 2.0L and 2.2L Engine
  • LPG Fuel Filter Replace - Mazda 2.0L and 2.2L Engine
  • Fuel Filter Replacement - Yanmar 2.6L Engine
  • Priming the Fuel System (Yanmar)
  • Lift Chains Wear Check
  • Integral Sideshift Carriage, Check Bearings
  • Steering Axle
  • Control Levers and Pedals
Maintenance Procedures Every 2000 Hours or Annually9 topics
  • Air Filter
  • Timing Belt
  • Fuel Injector, Yanmar Engines
  • Integral Sideshift Carriage
  • Transmission Oil and Oil Filter, Replace
  • Brake Fluid Change
  • Service Brakes
  • Drive Axle and Differential Oil, Change
  • Wheel Bearings
Maintenance Procedures Every 4000 Hours or 2 Years2 topics
  • Hydraulic Oil, Change
  • Cooling System
Safety Procedures When Working Near Mast
Hood Latch Check
Lift Chain Adjustments
Jump-Starting the Lift Truck2 topics
  • Jump-Starting Using a Battery Charger
  • Jump-Starting a Lift Truck Using Another Lift Truck
Welding Repairs
Overhead Guard Changes
Wheels and Tires Replacement4 topics
  • How to Change Solid Rubber Tire
  • Pneumatic Tire With Tube, Repair
  • Pneumatic Tubeless Tire, Repair
  • Solid Rubber Tires on Pneumatic Wheels, Change
Adhesives and Sealants
Table 1. Maintenance Schedule
Table 2. V-Belt Deflection Table
Table 3. Carriage Chain Adjustment, Forks Not Installed
Diagnostic Troubleshooting Manual
Safety Precautions TROUBLESHOOTING PROCEDURES
How To Use This Troubleshooting Manual3 topics
  • General Instructions and Safety Information
  • How to Use Diagnostic Troubleshooting Manual
  • General Instructions
Operational Diagnostic Procedures1 topic
  • Operational Checkout Procedures
Engine59 topics
  • Engine Basics
  • Engine Electrical
  • Engine Fuel System/Exhaust and Emissions
  • Engine Management
  • Engine Identification
  • Mazda (LPG) Engine Controls
  • Yanmar (Diesel) Engine
  • Engine Does Not Crank
  • Engine Does Not Start/Engine is Hard to Start
  • Engine Idle Speed Incorrect
  • Engine Idle Speed is Unstable or Engine Stalls at Idle
  • Engine Cuts Out, Misses, Hesitates, Sags, or Stumbles
  • Engine Lack of Power
  • Engine Speed Surge Or Engine Speed Unstable
  • Engine Backfires
  • Engine Is Knocking or Pinging
  • Excessive Engine Vibrations
  • Abnormal Engine and Exhaust Noises
  • Abnormal Engine and Exhaust Smells
  • Fan or Alternator Bearing Noise
  • High Engine Fuel Consumption
  • Fuel Leaks
  • High Engine Oil Consumption
  • Engine Oil Leaks
  • Engine Oil is Discolored
  • Engine Coolant is Discolored
  • Engine Coolant Leaks
  • Engine Exhaust is Discolored
  • Alternator Light is Illuminated
  • Engine is Overheating
  • Engine Coolant Temperature is Low
  • Engine Oil Pressure is Low
  • Coolant System Test
  • Engine Compression Test
  • Engine Oil Pressure Test
  • Radiator Bubble Test
  • Fuel System Pressure Test
  • Engine Compression Test (Yanmar Diesel)
  • Fuel Injection Nozzle Test (Yanmar Diesel)
  • Vacuum Leak
  • Troubleshooting Guidelines and Procedures
  • Diagnostic Trouble Codes
  • Wiring Reference Data
  • Post 2007 Engine Connections
  • Harness Assembly Data
  • Electrical System
  • COMPONENT OPERATIONAL CHECK
  • Observed Symptom Operational Check
  • Device Operational Failure (Lights, Back-Up Alarm, Starter)
  • Devices (Lights, Back-Up Alarm, Starter) Does Not Turn Off
  • Vehicle Does Not Power On
  • Horn Does Not Operate
  • Horn Operates Continuously
  • Park Brake Warning Buzzer Does Not Sound When Operator is Out of
  • DSC Brake Fluid Level Icon Not Lighting When Brake Fluid Reservo
  • Brake Fluid Icon Stays ON Although Reservoir is Full
  • DSC Low Fuel Icon is Not Lighting When LPG Tank is Empty
  • LPG Low Fuel Icon Stays On Although LPG Tank is Full
  • Truck Powers On But Starter Motor Will Not Operate When Keyswitc
Drive Train25 topics
  • Mechanical Overview
  • Engine
  • Torque Converter
  • Pump PTO
  • Transmission
  • Transmission Control System Overview
  • Transmission Control Hardware
  • Driveshaft, Drive Axle, and Brakes
  • Inching Operation Is Not Smooth or Chatters
  • Bubbles or Foaming In Transmission Dipstick Tube
  • Lift Truck Does Not Move (Drive Axle)
  • Abnormal Drive Axle Noise
  • Abnormal Transmission Noise
  • Poor Brake Performance
  • Brakes Make Too Much Noise
  • Overheating Brakes
  • Discolored Drive Axle Oil
  • Parking Brake Will Not Release
  • Parking Brake Will Not Hold Lift Truck
  • Transmission Is Too Hot
  • Transmission Not Functioning Properly
  • Loss of Power/Drivetrain Performance
  • Transmission Warm-up Procedure
  • Transmission Pressure Test
  • Torque Converter Stall Test
Hydraulic Systems35 topics
  • Main Hydraulic System
  • Manual Hydraulic Control Valve
  • Steering System
  • Abnormal Hydraulic Noise and/or Vibration
  • Abnormal Smell/Discoloration/Foaming of Oil
  • Abnormal Steer Axle Noise
  • Abnormal Steering Wheel Vibration
  • Actuation Exhibits Slight Movement in Opposite Direction Before
  • Actuations Do Not Act Simultaneously
  • Auxiliary Function is Slow or Does Not Function (Manual Valve)
  • Cycle Times Too Fast - Fast Actuation (Manual Valve)
  • Function Continues to Activate After Returning to Neutral
  • Back Lash/Kick Back in Steering Wheel
  • Lift Function Is Slow or Does Not Function (Manual Valve)
  • Load Drops Slightly When Metering Lift Function (Manual Valve)
  • No Steering (All Other Hydraulic Functions OK)
  • Oil Leaking/Component Life Too Short
  • Steering Is Slow or Difficult
  • Steering Operation Is Not Smooth
  • Steering Wheel Turns By Itself or Does Not Return To Neutral
  • Steering Wheel End Lock Position Cannot Be Felt by Operator
  • Steering Wheel Turns the Tires in the Wrong Direction
  • Tilt Back Function Will Not Operate (Manual Valve)
  • Tilt Forward Functions When Spool is Activated Forward With Engi
  • Tilt Forward Will Not Function When Activated (Manual Valve)
  • Hydraulic Pump Flow Test
  • Hydraulic Warm-up Procedure
  • Main Control Valve Unloader Margin Test
  • Lift Cylinder Leakage Test
  • Main Relief Valve Test and Adjustment
  • Secondary Relief Valve Test and Adjustment
  • Steering Control Unit LS Pressure Test
  • Steering Cylinder Leakage Test
  • Steering Relief Pressure Test and Adjustment
  • Tilt Cylinder Leakage Test
Operators Station5 topics
  • Operator Station General Description and Principles of Operation
  • Display Switch Cluster (DSC)
  • Transmission Control and Braking
  • Manual Hydraulic Control Levers
  • Lighting Control
Front End (Mast) and Chassis34 topics
  • Carriages
  • Chassis
  • Cylinder Cushion During Lifting Sequence
  • Cylinder Cushion During Lowering Sequence
  • Front End, Mast
  • Lowering Control Valves
  • Mast Mounts
  • Three-Stage Full Free-Lift (FFL) Mast
  • Tilt and Sideshift Cylinders
  • Abnormal Channel Wear
  • Abnormal Hose Wear
  • Abnormal Mast Noise
  • Body Panels Making Noise
  • External Leakage From Free-Lift or Main Lift Cylinders
  • FFL Mast Banging During Phasing
  • High Tire Wear - Drive Axle
  • High Tire Wear - Steer Axle
  • Hoses Not Tracking Correctly
  • Integral Sideshift Moving Too Fast
  • Integral Sideshift Not Moving or Slow
  • LP Tank Bracket Disengages
  • LP Tank Rattles and Does Not Stay Latched
  • Mast is Loose
  • Mast Lift Chains Are Loose
  • Mast or Carriage Binding
  • Mast/Carriage Bounces or is Spongy
  • Misphasing of Full Free-Lift Mast
  • Overhead Guard Loose or Damaged
  • Racking During Lift
  • Racking During Tilt
  • Truck Feels Unstable
  • Truck Wanders, Does Not Track Straight or Steer Well
  • Wheels Appear Tipped or Misaligned
  • Wheels Spinning On Uneven Floors
Supplementary Data4 topics
  • Abbreviations and Acronyms
  • Special Tools List
  • Fault Mode Indicator (FMI) Reference List
  • TSP Reference Tables
Table 9020-40-1. Test Specifications
Table 9020-40-2. Service Tools
Table 9020-40-3. Test Specifications
Table 9020-40-4. Service Tools
Table 9020-40-5. Test Specifications
Table 9020-40-6. Service Tools
Table 9020-40-7. Test Specifications
Table 9020-40-8. Test Specifications
Table 9020-40-9. Service Tools
Table 9020-40-10. Test Specifications
Table 9020-40-12. Test Specifications
Table 9030-03-1. Circuit Group Identification
Table 9040-40-1. Test Specifications
Table 9040-40-2. Service Tools
Table 9040-40-3. Test Specifications
Table 9040-40-4. Test Specifications
Table 9040-40-5. Stall Speeds
Table 9050-43-1. Test Specifications
Table 9050-43-2. Service Tools
Table 9050-43-3. Test Specifications
Table 9050-43-4. Service Tools
Table 9050-43-5. Test Specifications
Table 9050-43-6. Service Tools
Table 9050-43-7. Test Specifications
Table 9050-43-8. Service Tools
Table 9050-43-9. Test Specifications
Table 9050-43-11. Test Specifications
Table 9050-43-13. Test Specifications
Table 9050-43-15. Test Specifications
Table 9050-43-17. Test Specifications
Table 9050-43-19. Test Specifications
Table 9080-50-1. Abbreviations and Acronyms
Table 9080-60-1. Special Tools
Table 9080-80-1. Resistor-Temperature Characteristics
Housing Fittings Replacement2 topics
  • Lift Trucks Manufactured Before July, 2013
  • Lift Trucks Manufactured After July, 2013
Drive Chains and Sprockets

Inside this manual

Real pages from this service manual (1,867 pages). Open the sample pages (PDF, 314 KB)

Sample pages from the Hyster A274 (H50CT) Forklift Service Manual: Diagram, Specifications, Troubleshooting, Color page, Color page
  • Diagram, page 833: Hood, Seat, and Side Covers Replacement
  • Specifications, page 1,169: Quantity
  • Troubleshooting, page 1,729: Observed Symptoms
  • Color page, page 1,631: Principles of Operation
  • Color page, page 1,720: Front End (Mast) and Chassis

This is a service manual

Here's how it compares to the other manual types.

This manual

Service manual

Factory repair procedures and technical information such as specifications, troubleshooting, and wiring and hydraulic diagrams, for the models and systems the manual covers. See What's inside for its topics.

Operator's manual

Safe operation, controls, maintenance schedules, lubrication points, inspections, and basic checks. Repair procedures are in the service manual.

Parts manual

Illustrated diagrams with factory part numbers for identifying components and ordering parts. Repair procedures are in the service manual.

Engine service manuals are sometimes sold separately, since certain machine models were offered with more than one engine option.

What it's used for

Factory manual for in-house farm and construction shop use. Straightforward, complete, and easy to follow. It contains the OEM information dealership service departments and parts counters use to diagnose problems, identify components, and perform maintenance or repairs correctly.

Service shops and owner/operators who repair their own equipment

Identifying correct parts and seeing how assemblies come apart and go back together

Keeping equipment running with less downtime

Factory manual, 1,867 pages

Quantity one is the manual described above.

Fast free USA shipping

Ships in 1 business day.

60-day returns

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Binder not included

Manuals over about 300 pages may need a standard 3-ring binder, which you can buy locally to keep the pages organized for shop use.

Questions about model, serial number, engine coverage or contents? Contact us before purchasing and we'll help confirm it's the right manual. Please verify the manual type, machine model, serial number range and engine coverage before purchasing: manuals ordered in error carry a 20% restocking fee (return policy).