1945–1955 Triumph Speed Twin (5T), Thunderbird (6T), Trophy (TR5), Tiger 100 (T100), Tiger 110 (T110) and 3T De-Luxe Workshop Manual (PN 99-0836)

Triumph Engineering Co. Ltd.'s Workshop Manual No. 11, Publication Part No. 99-0836, was published in April 1964. It covers the 1945–1955 Speed Twin, Thunderbird, Trophy, Tiger 100, Tiger 110 and 3T De Luxe, including rigid-frame and swingarm configurations.

Text search, bookmarks and page condition: OCR search works through much of the text, but some tables and illustrations are not searchable. Section bookmarks are included, though some open one page early. Wiring color labels benefit from zooming, but tiny switch markings remain indistinct. Printed pages 152–153 are missing, and some carburetor and air-filter pages have cropped left edges.

• Engine repair: Engine removal, cylinder-head and crankshaft overhaul, piston inspection, valve timing, and dry-sump lubrication service.

• Gearbox and clutch: Four-speed gearbox overhaul, gear-selection troubleshooting, multi-plate cork clutch repair, and transmission shock-absorber service.

• Carburetors: Amal and Amal Monobloc maintenance, S.U. M.C.2 jet centering, and diagnosis of flooding, sticking pistons and erratic running.

• Forks, wheels and brakes: Telescopic hydraulic fork alignment, wheel-bearing inspection, internal-expanding brake service, and rear-wheel removal for different frame configurations.

• Rear suspension: Mk. 1 and Mk. 2 Spring Wheel service, plunger guide box overhaul, and Girling spring and bushing replacement.

• Electrical troubleshooting: Dynamo and alternator systems, magneto and coil ignition, contact-breaker maintenance, and separate wiring diagrams for the two electrical layouts.

The repair sections suit experienced owners and mechanics with suitable workshop equipment; the foreword directs inexperienced owners to a Triumph dealer for engine, gearbox, fork and Spring Wheel overhauls.

Engine Repair, Timing and Lubrication

The O.H.V. twin engine chapters detail disassembly, inspection and reassembly of the crankcase, crankshaft, connecting rods and cylinder-head assemblies. Inspection data covers bores, piston rings, bearings and valve gear.

Decarbonizing, mechanical-breather service, twin-plunger oil-pump work and the oil-release valve and indicator are supported by the Lubrication Diagram and Timing Diagrams.

The separate 3T instructions explain its white-metal timing-side main bearing and connecting rods without removable big-end caps. Bearing fitting and crankshaft alignment receive their own treatment.

Tool references include the Z.89 camwheel tool and DA.50/1 extractor for magneto-gear and clutch removal. The cylinder-head section warns that incorrect rocker-box dismantling can break the cylinder-head mounting lugs.

Gearbox, Clutch and Drive Ratios

The exploded Gearbox (Component Parts) view supports inspection of the selector forks, camplate and kickstarter mechanism. Standard, wide and close ratios are distinguished, including changes to the speedometer drive. The supplement also identifies earlier gearbox parts that are not interchangeable with the revised design.

Clutch chapters cover rubber shock-absorber inserts, pressure-plate truing and primary-chaincase maintenance. Sprocket and gear-ratio tables distinguish solo and sidecar setups.

Engine-Number Changes and Model-Specific Data

The supplement identifies positive-ground wiring from engine number 19706 NA and the clutch-hub rubber-buffer shock absorber from 32303. Earlier machines use a spring-loaded cam shock absorber on the engine mainshaft.

From 37560, a crankcase identification mark distinguishes engines with ramp cams. The manual warns that using insufficient tappet clearance on these engines can burn the valves. These distinctions help match the wiring, clutch and valve-setting information to the machine's actual build.

Specification sheets also include T100C data, while the T100 racing-timing instructions identify cams E.3134. Model tables provide compression ratios, carburetor settings, ignition timing and capacities; overhaul sections add clearance, wear-limit and tightening data.

Amal and S.U. Fuel Systems

Amal coverage explains pilot passages, needle settings and throttle-slide operation, with separate Monobloc maintenance instructions. The S.U. M.C.2 section goes further into suction-piston movement, needle-to-jet contact, float-chamber flooding and jet-gland leakage.

Lucas Ignition and Charging

Electrical chapters cover the Lucas E3L dynamo, RM14 alternator and DKX2A distributor. Coil and condenser tests accompany fault-finding sections that distinguish no-spark conditions and different behavior in the IGN and EMG switch positions.

Wiring Diagram (T100 & T110) and Wiring Diagram (5T & 6T) show the dynamo and A.C. electrical arrangements, respectively.

Forks, Spring Wheels and Girling Units

Fork work includes steering-head bearings, pressure-tube inspection and alignment. Rear-wheel chapters distinguish rigid, swingarm and quickly detachable assemblies.

The Rear Spring Wheel (Sectioned) view supports the Mk. 2 overhaul instructions. Spring Wheel plunger guide box work requires the specified spring-compression equipment because the assembly contains loaded springs.

Girling S/MDA/4/4 coverage addresses spring and bushing replacement and external checks; internal hydraulic damper faults are referred for specialist service.

PDF Contents and Included Pages

Supplied as one printable 213-page PDF, including the supplementary instructions and indexes. The total already includes the outer cover and two additional illustrated pages, as well as the manual's title and imprint pages.