Category Archives for F510-F525

F510 & F525 – ENGINE STARTS HARD OR STOPS WHEN HOT

Conditions: • Transmission in neutral • Park brake engaged • PTO disengaged • Engine hot

27. August 2021 by samuel07042012
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F510 & F525 – LACK OF FUEL IN CARBURETOR

Conditions: • Transmission in neutral • Park brake engaged • PTO disengaged

27. August 2021 by samuel07042012
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F510 & F525 – ENGINE FLOODING

Conditions: • Transmission in neutral • Park brake engaged • PTO disengaged

26. August 2021 by samuel07042012
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F510 & F525 – ENGINE CRANKS BUT WILLNOT START

Conditions: • Transmission in neutral • Park brake engaged • PTO disengaged • Key switch in “START” position

26. August 2021 by samuel07042012
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F510 & F525 – AUTOMATIC COMPRESSION RELEASE

Function: To lower engine compression for easier starting. Major Components: • Fly-Weights • Spring • Tab Theory of Operation: The automatic compression release uses fly-weights and a tab to slightly lift the exhaust valve which releases engine compression. The compression … Continue reading

26. August 2021 by samuel07042012
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F510 & F525 – COOLING SYSTEM

Function: Remove heat from engine. Major Components: • Intake Screen • Flywheel Fan • Engine Covers • Cooling Fins Theory of Operation: The engine is air cooled with air flow provided by a fan (A) that is a part of … Continue reading

26. August 2021 by samuel07042012
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F510 & F525 – BREATHER SYSTEM OPERATION

Function: Maintain a vacuum in the crankcase to prevent oil leaks. Major Components: • Breather Valve • Maze • Breather Passage • Oil Return Passage Theory of Operation: The engine is equipped with a breather system that allows air to … Continue reading

26. August 2021 by samuel07042012
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F510 & F525 – ENGINE LUBRICATION CIRCUIT

A—Engine Lubrication Circuit B—High Pressure Oil C—Return/Pressure-Free Oil D—Oil Filter E—Engine Oil Pressure Relief F—Engine G—Oil Pump H—Oil Pump Screen I—Sump J—Transaxle The F510 (PA420A) and F525 (PA540A) engines utilize a common sump (I) supplying oil for engine and hydrostatic … Continue reading

26. August 2021 by samuel07042012
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F510 & F525 – LUBRICATION SYSTEM OPERATION

A—Oil Pressure Relief Valve B—Relief Valve Spring C—Oil Pump D—Screen E—Oil Pump Gear F—Lower Balancer Link G—Balancer H—Oil Return Passage I—Breather Passage J—Upper Balancer Link K—Crankshaft Ball Bearing L—Connecting Rod Journal M—Connecting Rod Passage N—Camshaft Bearing O—Crankshaft Main Bearing P—Oil … Continue reading

26. August 2021 by samuel07042012
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F510 & F525 – INTERNAL ENGINE COMPONENTS

A—Flywheel B—Cylinder Head C—Breather Valve D—Intake Valve E—Rocker Arm Assemblies F—Exhaust Valve G—Push Rods H—Piston and Connecting Rod Assembly I—Cam Lifters J—Twin Gears K—Camshaft L—Automatic Compression Release Mechanism M—Oil Pump Assembly N—Crankshaft Assembly O—Balancer Assembly

26. August 2021 by samuel07042012
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