STIHL 056 Parts Manual

The STIHL 056 is a professional-grade chainsaw designed for demanding forestry and cutting applications. This parts manual provides detailed information on the components, assembly, maintenance, and replacement parts for the STIHL 056 series. Below are key sections covering identification, engine components, cutting attachments, maintenance procedures, and parts ordering information.

1. Model Identification & Specifications 2. Engine Assembly & Components 3. Fuel System Parts 4. Ignition System Components 5. Cutting Attachment Assembly 6. Chain Brake & Safety Features 7. Maintenance & Service Intervals 8. Exploded Views & Parts Diagrams 9. Torque Specifications 10. Warranty & Service Information 11. Troubleshooting & Common Issues

Model Identification & Specifications

Key identification features: Serial number location, model variations (056 AV, 056 Magnum, 056 Super), and technical specifications.

Feature	Description
Engine Type	2-stroke, single cylinder, air-cooled
Displacement	56.5 cc (3.45 cu. in.)
Power Output	Approx. 4.5 kW (6.1 hp)
Fuel Capacity	0.85 L (28.8 fl. oz.)
Oil Tank Capacity	0.32 L (10.8 fl. oz.)
Guide Bar Lengths	Recommended 40-63 cm (16"-25")
Weight (powerhead)	Approx. 7.8 kg (17.2 lbs)
Ignition System	Electronic, breakerless
AV System	Anti-vibration handles (056 AV models)
Serial Number Location	Stamped on crankcase near rear handle

Engine Assembly & Components

Crankcase, cylinder, piston, crankshaft, and connecting rod assembly parts.

Cylinder Assembly: Includes cylinder, decompression valve, and mounting studs.
Piston Assembly: Piston, rings, wrist pin, and circlips.
Crankshaft Assembly: Crankshaft, main bearings, seals, and flywheel.
Crankcase: Upper and lower halves with gasket.
Starter Assembly: Rewind starter, pulley, spring, and rope.

WARNING! Engine components are under high stress; use genuine STIHL parts for replacement. Ensure proper torque during assembly.

Fuel System Parts

Carburetor, fuel lines, filter, tank, and associated components.

Carburetor: Tillotson HS or Walbro HD series with adjustment screws.
Fuel Tank: Includes cap, vent, and mounting points.
Fuel Lines: Supply and return lines with connectors.
Fuel Filter: In-tank filter element.
Impulse Line: Connects crankcase to carburetor pump.

CAUTION! Use only clean, fresh fuel mixture (50:1 STIHL HP Ultra oil). Inspect fuel lines regularly for cracks.

Ignition System Components

Ignition Module: Electronic, includes spark advance.
Spark Plug: Bosch WSR6F or equivalent, gap 0.5 mm (0.020").
Stop Switch: Ground wire to ignition module.
Flywheel: Magnets for ignition timing.
Wiring Harness: Connects switch to module and ground.
Testing: Check for spark with plug removed and grounded to cylinder.

Cutting Attachment Assembly

Guide bar, chain, sprocket, clutch, and drive components.

Guide Bar: Roller nose or hard nose, various lengths. Chain: 3/8" pitch, .063" gauge, round or square ground. Sprocket: Rim sprocket or spur sprocket assembly. Clutch: Centrifugal, drum, and springs. Oil Pump: Manual or automatic, with adjuster and drive worm.

Chain Brake & Safety Features

Front hand guard, brake band, activation lever, and inertia mechanism.

Turn off engine before inspecting brake components.
Check brake band for wear and proper tension.
Test activation by striking hand guard forward.

Tip: The chain brake must be functional before each use. Replace worn parts immediately.

Maintenance & Service Intervals

Daily and periodic maintenance tasks and recommended parts.

Air Filter: Clean daily, replace when damaged.
Spark Plug: Check gap, replace annually or after 100 hours.
Fuel Filter: Replace every 3 months or as needed.
Chain Sprocket: Inspect for wear, replace with bar/chain.
Bar Groove: Clean and lubricate daily.
Cylinder Fins: Clean regularly for proper cooling.
Anti-vibration Elements: Check for deterioration (AV models).
Carburetor Adjustment: May require seasonal adjustment.

WARNING! Always disconnect spark plug wire before performing maintenance. Use proper tools.

Exploded Views & Parts Diagrams

Reference diagrams for assembly order and part numbers.

Torque Specifications

Critical fastener torque values (Nm / in-lbs).

CAUTION! Overtightening can strip threads; undertightening can cause failure.

Warranty & Service Information

Troubleshooting & Common Issues

Symptom	Possible Cause	Corrective Action
Engine will not start	Fuel, spark, compression	Check fuel mixture, spark plug, and decompression valve. Ensure choke/flood start used correctly.
Engine runs poorly	Carburetor, air filter, fuel line	Clean air filter; check for air leaks; adjust carburetor (L, H, LA screws).
Loss of power	Exhaust port clogged, piston scored	Clean muffler spark arrestor; inspect cylinder/piston for scoring.
Chain does not oil	Oil pump, lines, bar groove clogged	Check oil tank vent, pump drive, and bar oil holes. Clean oil passage.
Excessive vibration	AV mounts, clutch balance, loose parts	Inspect and replace worn anti-vibration elements. Tighten all fasteners.
Chain brake does not engage	Worn brake band, dirty mechanism	Clean and inspect brake components; replace band if worn beyond service limit.

Dealer Service: For major repairs (crankshaft, crankcase), consult an authorized STIHL dealer.

Parts Ordering: Use STIHL part numbers from diagrams. Example: 1110 141 2001 (Cylinder).