1969–1973 Triumph Trident T150 Service Manual (P/N 99–0963)

• Covers 1969–1973 Triumph T150 Trident and 1973 T150V models, including T150R and T150RV variants
• Official Triumph Engineering Co Ltd publication, Part No. 99–0963, including Supplement 00–4223 for 1973 models
• Contains 249 pages of technical specifications, exploded-view diagrams, and maintenance schedules for the 750cc three-cylinder motorcycles
• Essential reference documenting the transition from the 4-speed gearbox to the 1973 5-speed configuration
• Detailed component coverage includes Amal 626 concentric carburetors, Lucas RM20/21 alternators, diaphragm spring clutches, telescopic oil-damped forks, twin leading shoe brakes, Lockheed front disc brakes, and swinging fork suspension
• Features step-by-step procedures for stroboscopic ignition timing, carburetor synchronization, primary chain alignment, main bearing renewal, valve seat re-cutting, and gearbox cluster disassembly

Inside the Manual

This factory PDF repair manual gives you the exact technical breakdown needed for the late-model T150 series. By providing direct access to factory tolerances and limits, this guide delivers a clear workshop advantage, accelerating diagnostic times and preventing costly damage when balancing the complex triple-cylinder engine. It walks you through everything from basic motorcycle identification and frame numbering to complex sub-systems. You get detailed sections on the lubrication system, engine internals, transmission, and electrical setup, streamlining both routine maintenance and advanced troubleshooting. It outlines step-by-step procedures that save expensive trips to a vintage specialist, such as synchronizing the triple carburetors, resetting the ignition timing with a stroboscope, or completely splitting the crankcase. To guide you through these tasks, the content integrates essential wiring diagrams. It also provides targeted visual aids like the engine lubrication flow diagram, an exploded view of the Amal carburetor, the cylinder head bolt tightening sequence chart, an exploded clutch drawing, an exploded oil pump drawing, and a detailed valve timing marks view. Whether you are pulling the engine unit, rebuilding the cylinder head, or adjusting the primary chain, the layout makes finding the right factory procedure fast. Always review standard shop safety protocols before handling heavy engine components or electrical systems to prevent injury.

Key Technical Data

Factory-accurate data is critical when working on vintage British motorcycles. This guide delivers all major engine and chassis specifications, including precise torque settings for the crankshaft, connecting rods (18 lb./ft.), and cylinder head fasteners. Need factory clearances? You will find clear tables for pistons, valve guides, and camshaft journals. The manual also covers the lubrication system extensively, detailing oil pressure settings and seasonal grade recommendations. Specifics like the 0.006 in. inlet valve clearance and 38 degrees B.T.D.C. ignition timing are explicitly documented to ensure a precise rebuild.