CRAFTSMAN 917.256600 Service Manual
The CRAFTSMAN 917.256600 is a versatile outdoor power equipment platform that requires careful attention to safety and proper operating procedures. Before engaging with any maintenance task, familiarize yourself with the tool’s model-specific components, control layout, and safety labels to prevent injury and equipment damage. A clear understanding of the machine’s orientation, fuel system, and electrical connections will help you diagnose issues more accurately and perform repairs in a controlled, predictable manner. Always disconnect power sources and depressurize fuel systems as part of standard safety practices before performing service work. This preparation reduces the risk of accidental starts, fuel leaks, or electrical shocks during maintenance activities.
Safety considerations for operating and servicing this unit cover personal protection, workspace readiness, and environmental awareness. Wear appropriate PPE such as safety glasses, hearing protection, gloves, and sturdy footwear to mitigate common hazards associated with cutting, grinding, and engine servicing. Keep your workspace clean, well-lit, and free of stored fuel, open flames, and moisture to prevent slips, fires, or ignition of flammable vapors. When performing adjustments or repairs, ensure the machine is on a stable surface and properly supported to prevent tipping or unintended movement. Adhere to local regulations regarding fuel storage and disposal of used parts and fluids to minimize environmental impact and maintain compliance with safety standards.
Electrical and fuel safety are critical for the CRAFTSMAN 917.256600 due to the presence of a combustion engine and potentially exposed wiring. Always inspect electrical connectors for corrosion or damage and replace any compromised components before operation. Use the correct fuel type and mixture, and store fuel in approved containers away from heat sources. When performing carburetor, ignition, or fuel line work, work in a well-ventilated area to prevent the accumulation of hazardous vapors. Dispose of old fuel and contaminated oil according to local regulations, and never mix solvents or cleaners with fuel. Proper ignition source management and hand-tool usage further reduce the likelihood of accidents during service tasks.
Lockout and tagout procedures are essential to prevent accidental startup while servicing the machine. Remove the spark plug wire and ground the spark plug connector to interrupt ignition during maintenance. Verify that the engine stops completely before beginning disassembly or adjustment of any moving parts. If you need to drain fluids, use appropriate containers and absorbent materials to capture spills, and clean the area thoroughly after work. Always recheck that all fasteners are torqued to the manufacturer’s specifications and that guards, shields, and safety devices are reinstalled correctly before test running the equipment. Maintaining rigorous lockout practices protects technicians from unexpected starts and contributes to a safer service environment.
Injury prevention during maintenance includes careful handling of heavy components and awareness of pinch points. Use mechanical aids such as jacks, stands, or hoists when lifting large assemblies, and never attempt to lift heavy parts alone without assistance. Keep hands and clothing clear of belts, pulleys, and rotating shafts during inspection and adjustment. When removing or replacing components like blades, pulleys, or guards, secure the part and work slowly to avoid sudden movements. Establish a routine of inspecting for worn or damaged parts, and replace them with manufacturer-approved components to maintain performance and safety margins during operation.
Environmental safety involves proper handling of lubricants, coolants, and fuel system residues. Use approved containers for oil and fuel, and label waste streams clearly to prevent cross-contamination. Collect used oil, filters, and other consumables for recycling or disposal per local regulations. Avoid spillage by planning maintenance activities with drip pans and absorbent pads, and promptly clean any spills to prevent slipping hazards or soil contamination. Regularly inspect hoses and seals for leaks and replace compromised items to prevent environmental release and maintain optimal engine performance.
Operational readiness requires a systematic approach to checks before starting the machine. Conduct a visual inspection of the exterior and undercarriage for damage or wear, and ensure all shields and safety devices are present and undamaged. Check fluid levels, including engine oil and fuel, and top up as necessary following the manufacturer’s recommended specifications. Verify that the cooling system is clear of debris and that air intakes are unobstructed to prevent overheating during use. Finally, perform a gentle start-up test in a controlled area to confirm that all controls respond correctly and that there are no abnormal sounds or vibrations indicating issues requiring attention before full operation.
Following these safety considerations and maintenance practices helps ensure reliable performance and a longer service life for the CRAFTSMAN 917.256600. Always consult the official service manual for model-specific torque values, part numbers, and procedure details, and seek professional assistance for complex repairs beyond your training and capability. Adhering to established safety protocols protects technicians, bystanders, and the equipment itself from harm and unnecessary downtime.
The CRAFTSMAN 917.256600 is a lawn and garden tractor model that combines outdoor power performance with operator convenience. The unit is designed for mid-range to residential yard tasks, offering a balance between engine capability and handling. Key identifiers include the model number 917.256600, with a serial number and manufacture date typically found on the chassis label near the engine shroud or under the fender deck. Assembly and factory configuration information may vary by production run, so always verify the exact configuration against the original equipment label and service documentation before performing any maintenance. Understanding the base specifications helps technicians determine appropriate replacement parts, recommended service intervals, and safe operating practices for this tractor.
Overall dimensions and weight distributions influence stability and mowing performance. The unit generally features a mid-mounted deck, rear drive wheels, and a comfortable operator platform. The cutting deck width, wheelbase, and ground clearance are important for selecting compatible attachments and ensuring proper mower balance. When diagnosing performance issues, record perceived changes in acceleration, turning radius, and deck height consistency, as these can indicate incorrect belt tension, worn pulleys, or misadjusted linkage. Maintaining accurate specifications in the service log supports efficient troubleshooting and reduces the risk of incorrect part replacements.
The engine and powertrain subsystem of the 917.256600 is engineered to deliver reliable torque for mowing and light hauling tasks. Typical configurations use a small-block gasoline air-cooled engine with integral accessories such as the cooling fan, carburetor, and starter system. When performing maintenance, inspect the spark plug, air filter, fuel system, and exhaust components for signs of wear, carbon buildup, or leaks. Proper torque on fasteners and correct installation of gaskets and seals are essential to prevent air leaks and loss of compression, which can reduce engine efficiency and overall power output. Periodic testing of compression, ignition timing, and carburetor idle can help identify issues before they become major failures, ensuring longer engine life and consistent performance.
Powertrain performance depends on core components like the drive belt, pulleys, transmission, and differential assembly. Check belt tension and alignment to avoid slipping or overheating, especially during heavy mowing cycles. Inspect the transmission oil level (or hydraulic fluid if applicable), and replace according to the schedule to maintain smooth shifting and adequate lubrication. Wheel drive traction is influenced by tire condition and tread depth; monitor tire pressure and wear patterns to preserve even pulling power and stability on uneven terrain. Routine service should also include inspecting the brake system and linkage to ensure safe stopping distances and reliable operator control in variable yard conditions.
The electrical system on the 917.256600 supports essential functions such as starting, charging, lighting (if equipped), and safety interlocks. Begin with a visual inspection of the battery condition, terminals, and cable insulation for corrosion, looseness, or damage. A healthy battery should show proper voltage when tested with a multimeter, typically around 12.6 volts with the engine off and around 13.8 to 14.4 volts when charging. Electrical connections should be clean, tight, and free from moisture or debris to prevent intermittent operation or arcing. When diagnosing electrical faults, isolate circuits with a schematic to avoid misrouting power and ensure safety when probing live wires.
Wiring harnesses and connectors require careful inspection for cracked insulation, pinched wires, or signs of rodent damage. Any degraded insulation or compromised connectors should be replaced to restore reliable operation and reduce the risk of short circuits. If safety interlock systems are present, test each switch and relay to confirm that the mower will not start under unsafe conditions or when the safety keys are not engaged. Detailed inspection of the charging system, including the alternator or stator if applicable, ensures adequate battery recharge between uses and prevents battery failure during operation. Adhering to OEM wiring diagrams during diagnostic work minimizes the chance of miswiring components and preserves the integrity of the electrical system for long-term reliability.
The CRAFTSMAN 917.256600 is a compact, gas-powered outdoor equipment model that requires careful disassembly to access internal components for inspection, repair, or replacement. Begin by preparing a clean, well-lit workspace with a stable work surface and a containment plan for any spilled fuel. Disconnect the spark plug wire and ensure the engine is cool before any disassembly to prevent accidental ignition or burns. Remove the fuel shank or tank cap to relieve pressure and drain any remaining fuel into an approved container if necessary. Keep a labeled tray for fasteners and components to maintain correct reassembly orientation. Retain serviceable parts in a protected area to prevent loss or damage during the procedure. Use the correct screwdrivers and socket tools to avoid rounding fasteners, which can complicate future maintenance. If you encounter stubborn fasteners, apply a penetrating lubricant and allow adequate dwell time before attempting removal again. Throughout disassembly, document the sequence of parts removed to assist with accurate reassembly and troubleshooting later in the process.
Component access and safety precautions are essential to performing disassembly without compromising the unit’s integrity or personal safety. Wear cut-resistant gloves and safety glasses to shield your hands and eyes from sharp edges and debris. Support the equipment on a stable stand or table, ensuring it cannot tip or slide during the procedure. Disconnect any linkage, cables, and hoses only after confirming all energy sources—fuel, spark, and mechanical tension—are safely isolated. When working with the carburetor, keep track of small diaphragms and gaskets, as losing or misplacing these parts can lead to poor engine performance or fuel leaks upon reassembly. If the model includes a muffler or exhaust components, inspect for heat shielding and remove with care to prevent burns or damage to surrounding parts. Maintain a clean environment to minimize the risk of debris entering the carburetor or cooling fins, which can affect performance after reassembly. Before reinstallation, verify that all components are free of dirt, corrosion, and obstructions, and replace any worn or damaged parts according to the manufacturer’s specifications. Finally, recheck all fasteners for proper torque values as outlined in the service manual to ensure safe and reliable operation after the procedure is complete.
CRAFTSMAN 917.256600 equipment requires careful inspection and methodical testing to identify electrical, fuel, or mechanical faults that prevent proper operation. Begin by verifying basic power and safety conditions, including battery charge, ground connections, and proper ignition. Check the spark plug for wear, fouling, or incorrect gap, and examine the air filter for restrictions that could cause lean conditions or excessive engine effort. Ensure the muffler and exhaust paths are clear of blockages, as restricted flow can lead to back pressure and performance loss. With the unit powered off, carefully disconnect and inspect related wiring harnesses for damaged insulation, loose terminals, or corrosion, as intermittent electrical faults are often rooted in poor connections. Collect diagnostic data such as runtime hours, recent maintenance, and any abnormal noises or vibrations to guide the troubleshooting process.
Common failure modes and solutions require a structured approach to identify root causes and apply effective remedies. For fuel system issues, confirm the correct fuel type and freshness, and inspect the carburetor for varnish buildup or stuck float valves, which can cause rich or lean conditions. Replace or clean jets, adjust mixture screws as specified by the service data, and verify fuel line integrity to prevent air leaks that compromise performance. If starting problems persist, evaluate the ignition timing and coil condition, replacing faulty components and ensuring proper flywheel key alignment to maintain correct timing. For electrical faults, isolate circuits with a multimeter to verify continuity, resistance, and voltage presence at key points such as the ignition switch, safety interlocks, and kill switch, replacing any defective parts. If the unit runs but lacks power under load, inspect the air intake and exhaust for obstructions, and verify the blower housing and cooling passages are unobstructed to prevent overheating and performance drop.
During diagnostics, perform careful functional tests to confirm suspected faults. Start by performing a no-load check to observe idle behavior, throttle response, and RPM stability, noting any sputtering, misfires, or stalling. Then simulate operating conditions by loading the engine to its expected duty cycle while monitoring exhaust color, temperature, and fuel efficiency, which can indicate carburetion or ignition timing issues. Use a spark tester or inline gauge where appropriate to measure electrical output, ensuring consistent spark and adequate energy across all cylinders. Always follow torque specifications and assembly procedures when reassembling components after inspection or replacement, and recheck all fasteners for proper tightness to prevent vibration-induced failures. Document the final test results, noting any deviations from expected performance and whether adjustments or replacements resolved the issue.
The CRAFTSMAN 917.256600 service manual section on repair procedures and parts replacement provides a detailed, technician-focused overview of common maintenance tasks. This material emphasizes safe work practices, accurate torque specifications, and correct replacement techniques to ensure reliable operation of the drive system, transmission, and mowing deck. Proper attention to electrical connections, fuel system integrity, and lubrication points helps prevent premature wear and potential safety hazards. When approaching any repair, verify model-specific parts availability and consult the OEM schematic to confirm correct component identification before disassembly.
Drive system and transmission service begins with a thorough inspection of the belt drive, pulleys, and tensioners. Inspect belts for glazing, cracking, or fraying and replace any damaged belt components to maintain proper drive ratio and efficient power transfer. Pulleys should rotate freely without excessive wobble, and quick checks for misalignment can prevent abnormal wear. Transmission service often involves draining tannish or contaminated lubricants, replacing the filter if equipped, and refilling with the manufacturer-approved lubricant to the recommended level. After servicing, test the drive under load to confirm smooth engagement and consistent speed without slipping or harsh shifting.
When working on the mower deck and PTO system, begin with the deck lift and height adjustment mechanisms to ensure uniform cutting height and safe engagement. Inspect the blade spindle assemblies for play, bearing wear, and balance, replacing any worn components with OEM parts to preserve cutting efficiency and reduce vibration. The PTO deck engagement should operate without delay or excessive noise; if necessary, adjust linkage, ensure proper alignment of the PTO pulley with the engine drive shaft, and replace any worn safety interlocks. Regularly check the deck belt, ensuring it sits correctly in the grooves and maintains proper tension, and replace it if cracking or fraying is observed. Finally, verify blade nuts are torqued to the manufacturer’s specification and that blade replacement is performed with proper safety gear to prevent injury during maintenance activities.
Throughout all repair and replacement tasks, grounding and fuel safety remain paramount. Disconnect the spark plug wire and remove the battery before performing any service that involves electrical components or possible fuel exposure. Use approved lubricants and corrosion inhibitors, and follow torque specifications precisely to avoid component overloading or failure under load. When reassembling, apply a light coat of anti-seize compound where appropriate and ensure all fasteners are secure but not over-tightened, as excessive torque can damage housings or threads. After completing a service action, perform a functional test in a controlled environment, checking for unusual noises, vibrations, or leaks, and verify safe operation of all safety features before returning the machine to service.
In all tasks, maintain comprehensive documentation of parts replaced, service intervals, and observed wear patterns. This enables accurate tracking of the machine’s maintenance history and informs future repairs. If any component shows signs of unseen damage or if a repair requires special tools, consult the official parts catalog and service bulletin references to obtain the correct replacement parts and procedural notes. Adhering to these guidelines will help ensure that the CRAFTSMAN 917.256600 remains reliable, safe, and efficient in daily mowing operations.
The CRAFTSMAN 917.256600 is designed with multiple safety features and compliance requirements to protect the operator during service, maintenance, and operation. Before performing any service, ensure the machine is powered down and disconnected from all power sources to prevent accidental start-up. Verify that all guards, shields, and safety devices are present and in good condition, and do not operate the unit with damaged or missing safety components. Maintain a clean, well-lit work area free of clutter, moisture, and ignition sources to minimize the risk of trips, slips, or electrical hazards. Always wear appropriate personal protective equipment, including safety glasses, cut-resistant gloves, and hearing protection as required by the operation being performed.
Lockout tagout and storage procedures are essential to preventing unexpected energization during maintenance. Implement lockout/tagout devices to secure the power switch, ignition controls, and any stored energy sources before starting disassembly or adjustment work. Clearly label all lockout points with the maintenance technician’s information and the date of the procedure, and verify that no residual energy can be released during service. When multiple technicians are involved, establish a temporary control point to ensure that only one person can remove a lock at a time, preventing accidental re-energization. After completing any service, release stored energy in a controlled sequence, recheck all safety interlocks, and test the machine in a controlled environment before returning it to normal operation.
Storage considerations for the 917.256600 require that all tools and fasteners removed during service be organized and returned to their designated places to prevent foreign object damage (FOD) during reassembly. Keep flammable liquids stored in approved containers away from ignition sources, and ensure that all rags or solvents are properly sealed and disposed of according to local regulations. Maintain a dry, well-ventilated area to reduce the risk of corrosion or electrical issues, and inspect storage shelves and cabinets for damage that could compromise safety. Document any safety deviations or worn components found during inspection so future maintenance can address recurring issues promptly and safely.
In addition to lockout/tagout practices, comply with local environmental and occupational safety standards relevant to outdoor power equipment maintenance. Follow manufacturer-recommended torque specifications and procedural sequences to avoid overstressing components or creating hazardous contact points. Regularly inspect electrical connectors, hoses, and fuel lines for signs of wear, cracking, or leakage, and replace compromised parts before they fail in service. Keep maintenance records up-to-date, including part numbers, service dates, and observed conditions, to support warranty and regulatory compliance. Adopting these practices helps ensure safer maintenance operations and extends the service life of the 917.256600 while protecting the operator and bystanders.
The Appendix and reference materials for the CRAFTSMAN 917.256600 provide essential resources that support accurate diagnostics, safe operation, and reliable maintenance. This section consolidates reference documents, supplier information, and tools lists that technicians rely on during repair and restoration. Keeping these materials organized ensures that service tasks proceed with consistent procedures and verifiable data, reducing downtime and increasing the likelihood of restoring equipment to its original performance. Proper documentation also serves as a reliable repository for replacement part numbers, torque specifications, and safety guidelines that may not be repeated in the main service procedures. By routinely consulting these materials, a technician can cross-check information quickly and maintain a thorough record of work performed for future service needs.
Wiring diagrams and schematics are critical for understanding the electrical system layout, harness routing, and component interconnections of the 917.256600. Having access to clean, legible diagrams allows the technician to trace circuits, identify potential shorts, and verify signal paths without guesswork. Diagrams should be matched to the specific serial number range and revision level of the machine to prevent misinterpretation. When presenting these diagrams during a repair, it is important to annotate any observed deviations and reference them against the official service data to determine whether modifications or updates have occurred. Proper interpretation of schematics also aids in diagnosing intermittent faults, grounding issues, and sensor failures that can manifest as performance irregularities or safety concerns. Maintaining an organized collection of diagrams, with clear legends and revision dates, accelerates troubleshooting and supports effective handoffs between technicians.
In addition to diagrams, the appendix and reference materials typically include torque specifications, fastener diagrams, and component lists that underpin precise assembly and alignment procedures. Following the exact torque values for bolts, screws, and fasteners is essential to maintain structural integrity and safe operation. The reference materials also provide approved lubricant types, sealants, and tightening sequences that prevent leaks and ensure long-term reliability. Keeping a current parts catalog with correct part numbers helps ensure that replacements fit properly and that compatible upgrade options are identified when available. Regularly updating the service log with any deviations from standard procedures, along with the corresponding part references, creates a traceable history that supports warranty compliance and future maintenance planning.
For practical use, technicians should store these materials in a clearly labeled binder or digital archive, organized by system and function. Cross-referencing the wiring diagrams with the component location images in the manual increases accuracy when performing wire harness inspections or rework. It is also beneficial to keep high-resolution scans of diagrams accessible on a portable storage device for on-site work where network access may be limited. When preparing for a service call, practitioners should review the appendix and reference materials beforehand to ensure all required tools, parts, and safety precautions are in place. A disciplined approach to consulting these resources helps mitigate errors and supports a faster, more dependable repair process for the CRAFTSMAN 917.256600.