STIHL 019T Chainsaw Parts Manual

The STIHL 019T is a professional-grade top-handle chainsaw designed for arborists and tree care professionals. This parts manual provides detailed diagrams, part numbers, and ordering information for all components of the STIHL 019T chainsaw, including the engine assembly, fuel system, ignition system, cutting attachment, guide bar, chain, and safety features. Below are key sections for identification, engine parts, fuel system, cutting equipment, and ordering.

1. Identification & Specifications 2. Engine Assembly Parts 3. Fuel System & Carburetor 4. Ignition & Electrical System 5. Cutting Attachment & Guide Bar 6. Chain & Sprocket 7. Safety & Control Parts 8. Housing & Covers 9. Fasteners & Hardware 10. Maintenance Schedule 11. Parts Ordering & Support

Identification & Specifications

Key identifiers: Model 019T, serial number location on crankcase, engine displacement, power output.

Feature	Description
Model	STIHL 019T
Engine Type	Single-cylinder, two-stroke, air-cooled
Displacement	31.8 cc (1.94 cu. in.)
Power Output	1.8 kW (2.4 hp)
Fuel Capacity	0.25 L (0.07 US gal)
Oil Tank Capacity	0.20 L (0.05 US gal)
Guide Bar Lengths	12" to 16" (30 cm to 40 cm)
Chain Pitch	3/8" PMM or 1/4" PMM
Weight (powerhead)	Approx. 3.9 kg (8.6 lbs)
Ignition System	Electronic, capacitor discharge (CDI)

Engine Assembly Parts

Cylinder, piston, crankshaft, connecting rod, bearings, seals, and gaskets.

Cylinder Assembly: Includes cylinder, cylinder head, and cooling fins.
Piston Assembly: Piston, piston rings, wrist pin, and circlips.
Crankshaft Assembly: Crankshaft, main bearings, and seals.
Crankcase: Upper and lower halves with gasket.

WARNING! Engine components are precision parts; use proper tools and torque specifications during assembly.

Fuel System & Carburetor

Fuel tank, fuel filter, fuel lines, carburetor (Zama C1Q-S series), primer bulb, and throttle linkage.

Remove fuel tank cap and drain fuel before servicing.
Inspect fuel lines for cracks and replace if necessary.
Clean or replace fuel filter in fuel tank.
Adjust carburetor H and L needles per STIHL specifications.

CAUTION! Fuel is flammable; work in well-ventilated area away from ignition sources.

Ignition & Electrical System

Ignition Module: CDI unit, part number 4140 400 1301.
Spark Plug: Bosch WSR 6 F or equivalent, gap 0.5 mm (0.020").
Stop Switch: Wire and contact assembly.
Wiring Harness: Connects ignition module to stop switch and spark plug.
Flywheel & Magneto: Includes flywheel, fan, and ignition coil.
Starter Assembly: Recoil starter, rope, pulley, and spring.

Cutting Attachment & Guide Bar

Clutch assembly, drum, rim sprocket, guide bar mount, and bar adjustment parts.

Guide Bar Types: Rollomatic E (laminated) or Rollomatic ES (solid). Bar lengths: 12", 14", 16". Bar part numbers vary by length and type.

Clutch: Centrifugal clutch assembly, clutch drum, and needle bearing. Bar Mount: Includes tensioner screw, adjuster pin, and bar nuts. Chain Brake: Band, handle, and activation mechanism parts.

Chain & Sprocket

Chain types: 3/8" PMM (Picco Micro Mini) or 1/4" PMM. Drive link count varies by bar length.

Chain Identification: Check pitch, gauge, and drive link count stamped on drive links.
Sprocket: Rim sprocket (part number 0000 642 1003 for 3/8" PMM).
Chain Sharpening: Use appropriate round file size (e.g., 4.0 mm for 3/8" PMM).

Tip: Always match chain pitch and gauge to guide bar and sprocket.

Safety & Control Parts

Chain brake, throttle trigger, throttle lockout, stop switch, hand guard, and anti-vibration elements.

Chain Brake Assembly: Brake band, handle, spring, and activation lever.
Throttle Control: Trigger, cable, and lockout lever.
Anti-Vibration: Rubber dampeners and springs in front and rear handles.
Hand Guard: Plastic guard covering front handle.
Stop Switch: Wire and contact plate.

WARNING! Never operate chainsaw with damaged or missing safety components.

Housing & Covers

Top cover, clutch cover, starter cover, air filter cover, and muffler cover.

Fasteners & Hardware

Screws, nuts, washers, and clips specific to STIHL 019T.

CAUTION! Use only STIHL-approved fasteners; improper hardware can lead to failure.

Maintenance Schedule

Daily: Check chain tension, sharpness, and lubrication. Clean air filter. Weekly: Inspect spark plug, fuel filter, and bar/chain wear. Monthly: Check all fasteners, anti-vibration elements, and clutch function. Annually: Replace fuel lines, clean muffler spark arrestor, inspect crankshaft seals.

Parts Ordering & Support

Symptom	Possible Cause	Corrective Action / Part Needed
Engine won't start	Fuel system, spark	Check fuel filter (part 0000 350 3501), spark plug (WSR 6 F).
Chain won't turn	Clutch, sprocket	Inspect clutch shoes (1122 160 2001) and rim sprocket.
Excessive vibration	AV mounts	Replace anti-vibration buffers (part 1128 790 0800).
Oil not lubricating	Oil pump, lines	Check oil pump (1122 640 3201) and oil lines.
Chain brake not engaging	Brake band, spring	Replace brake band (1122 650 0801) and spring.

Ordering: Use STIHL part numbers from this manual. Contact authorized STIHL dealer.

Support: STIHL USA: 1-800-467-8445; www.stihlusa.com