1954 Ferguson TEA20 # 19 Checking the new Cam Sprocket timing (Step by Step Guide)

Properly timing a Ferguson TEA20 camshaft is a critical step in any Standard Motor Company engine rebuild, especially when working with aftermarket parts that may lack factory timing marks. In this video, presenter Lance demonstrates the technical process of transferring timing marks from an old sprocket to a new Sparex cam sprocket and crankshaft gear. Whether you're a vintage tractor enthusiast or a professional mechanic, this guide on valve timing and sprocket alignment is essential for ensuring your Ferguson tractor runs with precision. Part 19 of our Ferguson TEA20 overhaul focuses on the precision task of checking camshaft timing. Lance compares the original worn timing gears with new Sparex replacements, identifying a common issue: the lack of pre-stamped timing marks on the new sprockets. You'll learn the "overlay method" to accurately align bolt holes and gear teeth, allowing you to manually mark the new gear for a perfect Top Dead Center (TDC) setup. The video also explores the relationship between the camshaft lobes and the sprocket's orientation. Lance explains how to verify number one cylinder firing position by observing the inlet and exhaust lobes and the alignment of the internal oil lubrication holes. Parts used in this restoration can be purchased from Queensland Tractor Spares Web Site: https://www.queenslandtractorspares.com.au Chapter Markers 0:18 Introduction: Comparing Worn vs. New Cam Sprockets 1:25 Identifying Part Numbers and Missing Timing Marks 3:31 Inspecting Lubrication Holes and Weight Wear Marks 4:50 The Overlay Method: Transferring Timing Marks 6:50 Aligning Sprocket Teeth and Bolt Holes for Precision 8:38 Determining the Camshaft's Position for Number 1 Firing 9:48 Verifying Valve Overlap and Top Dead Center 12:12 Explaining Offset Bolt Patterns and "Half-Tooth" Adjustments 13:00 Preparing the Crankshaft Gear for Installation

Added 17 Apr 2026