Stihl 029 Chainsaw Parts Manual

The Stihl 029 is a professional-grade chainsaw known for its reliability and power. This parts manual provides detailed information on the components, assembly, maintenance, and replacement parts for the Stihl 029 chainsaw. Below are key sections covering identification, major assemblies, engine components, cutting attachments, maintenance, and ordering information.

1. Identification and Specifications 2. Major Assemblies Overview 3. Engine Components 4. Fuel and Ignition System 5. Cutting Attachment and Guide Bar 6. Drive and Clutch Assembly 7. Handle and Control Components 8. Maintenance and Service Intervals 9. Torque Specifications 10. Exploded Views and Parts Lists 11. Troubleshooting and Warranty

Identification and Specifications

Key identification: Model number 029, serial number location on crankcase. Engine type: Two-stroke, single cylinder.

Specification	Description
Displacement	56.5 cc
Power Output	3.4 kW (4.6 hp)
Fuel Tank Capacity	550 ml
Oil Tank Capacity	260 ml
Guide Bar Length (max)	20 inches (50 cm)
Chain Pitch	3/8" or .325"
Weight (powerhead only)	5.9 kg
Ignition System	Electronic, capacitor discharge
Spark Plug	Bosch WSR6F or equivalent
Fuel/Oil Mix Ratio	50:1 (Stihl HP Ultra or equivalent)

Major Assemblies Overview

Main assemblies: Engine assembly, fuel system, ignition system, cutting attachment, clutch, handle, and housing.

Engine Assembly: Crankcase, cylinder, piston, crankshaft, bearings.
Fuel System: Tank, carburetor (Walbro or Zama), fuel lines, filter.
Ignition System: Flywheel, ignition module, spark plug, stop switch.
Cutting Attachment: Guide bar, saw chain, sprocket, chain tensioner.
Clutch Assembly: Centrifugal clutch, drum, sprocket.
Handle and Housing: Front and rear handles, antivibration elements, housing covers.

WARNING! Always disconnect spark plug before servicing. Use proper tools and follow safety procedures.

Engine Components

Cylinder and Piston: Aluminum cylinder with chrome plating; piston with two rings.

Crankshaft: Supported by two ball bearings; includes connecting rod.
Crankcase: Two-piece design; houses crankshaft and bearings.
Bearings: Main bearings (6202 and 6203); needle bearing for connecting rod.
Gaskets and Seals: Cylinder base gasket, crankcase seals, intake gasket.

CAUTION! Ensure all gaskets and seals are replaced during reassembly to prevent air leaks.

Fuel and Ignition System

Carburetor: Walbro WT-324 or Zama C1Q; includes adjustment screws (H, L, idle).
Fuel Lines: Supply and return lines; replace if cracked or hardened.
Fuel Filter: In-tank filter; replace annually or as needed.
Ignition Module: Electronic; air gap 0.3 mm to flywheel.
Flywheel: Magneto type; keyed to crankshaft.
Spark Plug: Gap 0.5 mm; replace every 100 operating hours.
Stop Switch: Grounds ignition to stop engine.

Cutting Attachment and Guide Bar

Guide Bar: Stihl Rollomatic or Duromatic; lengths 16" to 20". Chain: Stihl Oilomatic; pitch 3/8" or .325".

Sprocket: Rim sprocket or spur sprocket; replace when worn. Chain Tensioner: Screw-type adjustment via side cover. Bar Nuts: M8 nuts secure guide bar.

Maintenance: Clean bar groove regularly; flip bar monthly for even wear; lubricate sprocket nose.

Drive and Clutch Assembly

Clutch: Centrifugal, drum-type. Clutch Springs: Three springs engage shoes at specific RPM.

Remove clutch: Use clutch holder tool and socket.
Inspect shoes: Replace if worn or cracked.
Clutch drum: Check for wear on inner surface; replace if grooved.
Drive Sprocket: Rim sprocket (easily replaceable) or spur sprocket.

Tip: Clean clutch area of wood chips and debris regularly to prevent overheating.

Handle and Control Components

Front Handle: Includes throttle trigger and throttle lockout. Rear Handle: Includes master control lever (stop/run/choke).

Throttle Linkage: Connects trigger to carburetor.
Antivibration Elements: Rubber mounts isolate handles from engine.
Chain Brake: Manual or inertial; band and mechanism.
Hand Guards: Protect hands from debris.
Decompression Valve: Optional; eases starting.

WARNING! Ensure chain brake functions properly before each use. Test by engaging brake with saw off.

Maintenance and Service Intervals

Daily: Check chain tension, sharpness, and lubrication. Clean air filter, check for loose fasteners.

Torque Specifications

Cylinder bolts: 20 Nm. Crankcase bolts: 10 Nm. Clutch: 40 Nm (left-hand thread). Spark plug: 25 Nm. Guide bar nuts: 12 Nm.

CAUTION! Use a torque wrench for critical fasteners. Overtightening can damage components.

Exploded Views and Parts Lists

Refer to Stihl parts catalog for 029. Diagrams include: Engine group, fuel system, ignition, clutch, cutting attachment, handles. Part numbers are Stihl-specific; use when ordering.

Troubleshooting and Warranty

Symptom	Possible Cause	Corrective Action
Engine won't start	Fuel, spark, compression	Check fuel mix, spark plug, carburetor settings, compression (should be >120 psi).
Engine runs poorly	Air filter, carburetor	Clean/replace air filter; adjust carburetor H and L screws.
Chain doesn't turn	Clutch, sprocket, brake	Inspect clutch springs/shoes; check chain brake engagement; replace worn sprocket.
Excessive vibration	Mounts, balance	Replace antivibration elements; check for bent crankshaft or clutch drum.
Oil not dispensing	Oil pump, lines, bar	Check oil pump drive, lines for blockage, bar oil holes.

Warranty: Stihl limited warranty; see dealer for terms. Use only genuine Stihl parts.

Service: Contact authorized Stihl dealer; visit www.stihlusa.com for dealer locator.