Husqvarna 40 Workshop Manual Repair
Husqvarna 40 Workshop Service Manual for the Husqvarna 40 chainsaw. The PDF workshop service manual has accurate, easy to understand information and diagrams to help repair and service the chainsaw. Service Information to help you to troubleshoot, repair and fix the Husqvarna 40 chainsaw. View pages online or download a complete PDF service manual that you can easily save, print or view on any device.
Husqvarna 40 Workshop Service Manual Contents
Contents, Introduction, Safety Regulations, Symbols, Technical data, Service tools, Service data, Safety equipment, Starter, Electrical system, Centrifugal clutch, Lubrication system, Carburetor, Tank unit, Anti-vibration system, Piston and cylinder, Crankcase and crankshaft, Troubleshooting, Repair Instructions.
Carburetor – General Chainsaw Adjustment
Adjusting the carburettor involves adjusting the engine to the local conditions e.g. climate, altitude, fuel and type of two-stroke oil. The carburettor is equipped with three adjustment options.
L = Low speed jet
H = High speed jet
T = Idling adjustment screw
The L and H jets adjust the fuel flow to match the airflow that the throttle valve opening allows. Turning them clockwise makes the fuel/air mixture weaker (less fuel in relation to the amount of air) and turning them anti-clockwise makes the fuel/air mixture richer. A weak mixture increases the engine speed and a rich mixture decreases the engine speed. The T screw controls the throttle position when idling. Turning the T screw clockwise gives faster idling; turning it anti-clockwise lowers idling speed (see manual for complete guide).
See the complete service workshop manual, carburetor manual, parts list, operator manual and technical supplements PDF downloads. Also the repair and service articles available on this website for more information on how to service, repair and find parts for the chainsaw.
Husqvarna 40 Chainsaw Specifications
YEAR INTRODUCED: 1978
YEAR DISCONTINUED: 1991
ENGINE DISPLACEMENT: 40ccm (2.4 cu. in.)
CYLINDER BORE: 40mm (1.575 in.)
PISTON STROKE: 32mm (1.260 in.)
CYLINDER TYPE: Aluminum with Chrome plated bore
H.P.: 2.5 (1.8 kW)
WEIGHT: 5.6 kg with 32 cm bar & chain, 12.3 lbs. with 13 in. bar & chain
CHAIN BRAKE: Mechanical
DRIVE TYPE: Direct
CONSTRUCTION: Die cast Magnesium
MAGNETO TYPE: Breaker point flywheel ignition system
CARBURETOR: Walbro HDC series ZAMA C1Q-EL1
STARTER TYPE: Husqvarna automatic rewind
OIL PUMP: Automatic, adjustable
MAXIMUM ENGINE RPM: 9,000, 12,500 max free after break in.
IDLE RPM: 2,500
IGNITION TIMING: Points should begin to open when mark on flywheel is 2.5mm (0.1 in.) from upper edge of lower coil lamination leg. Use test light or continuity meter for setting.
BREAKER POINT SETTING: 0.3 to 0.4mm (0.012 to 0.016 in.)
FLYWHEEL/COIL AIR GAP: 0.30 to 0.35 mm (0.012 to 0.016 in.)
SPARK PLUG TYPE: Bosch WS7F, Champion RCJ7Y
SPARK PLUG GAP: 0.5mm (0.020 in.)
FUEL TANK CAPACITY: 500 ml (1.05 pints)
FUEL OIL RATIO:
RECOMMENDED FUEL OCTANE: Regular
MIX OIL SPECIFICATION: Two-stroke chain saw mix oil
CHAIN PITCH: .325 in.
CHAIN TYPE: Oregon 20LP, 21LP
SHORTEST GUIDE BAR SUPPLIED: 32 cm (13 in.)
LONGEST GUIDE BAR SUPPLIED: 45 cm (18 in.)
Read the Husqvarna 40 Workshop Manual for more chainsaw specs.
The Husqvarna 40 chainsaw is a powerful chainsaw that allows users to quickly and easily slice through wood. Husqvarna 40 Chainsaws were sold during the years 1986-2001 throughout the world.
Bar and chain
The standard bar length for a Husqvarna 40 is 13 inches long. This chainsaw supports Husqvarna H25 and H30 chains and a bar length up to 18 inches long. The bar has a pitch of 0.325 inches, which results in a usable cutting length that ranges from 12.6 to 17.5 inches. At maximum power, the chain travels 57 feet per second. The thickness of the linked drive is 0.050 or 0.058 inches. The drive wheel is equipped with seven teeth.
Engine for a Husqvarna 40 chainsaw is a two-stoke engine that requires leaded or unleaded gas with a recommended minimum octane rating of 90. The engine has a displacement of 2.43 cubic inches and makes 2 horsepower. The stroke of the cylinder is 1.26 inches in depth and the bore is 1.57 inches in diameter. This chainsaw has an idle speed of 2,500 rpm and a maximum recommended speed of 12,500 rpm.
Ignition, oil, fuel and weight
Husqvarna 40 chainsaws feature an energy transfer Phelon Ignition system. The spark plug is a Champion model RCJ 7Y unit that requires an electrode hole of 0.02 inches. This chainsaw utilizes a Zama C1Q carburetor with an automatic oil pump. Oil pump capacity is 0.27 ounces per minute at 8,500 rpm. This model holds up to 0.53 pints of oil and 1.06 pints of fuel. The chainsaw weighs 10.3 lbs. without chain and bar.
Safety, Vibration, noise
The Husqvarna 40 chainsaw has a chain brake and chain catcher to protect the operator from chain-related accidents. Other safety features include a right hand guard, throttle lock, front hand guard and a stop switch close to the throttle. The chainsaw has a vibration damping system. This system limits vibration levels to an acceleration of 13.78 feet per second for the rear handle and 6.23 feet per second for the front handle. The chainsaw has a power noise level of 107 dB and a pressure sound level of 100 dB at the operator’s ear.
Husqvarna 40 Workshop Manual PDF
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