Triumph Trident T150, T150V, BSA Rocket III Repair Manual 1969-1975

SKU: HYM136-975
Triumph Trident T150, BSA Rocket III Repair Manual 1969-1975
Triumph Trident T150, BSA Rocket III Repair Manual 1969-1975
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Item Description

This DIY repair workshop manual by Haynes covers the following 1969-1975 Triumph and BSA Triple motorcycles:

  •  Triumph T150 Trident, 1969-1972
  •  Triumph T150V Trident, 1972-1975
  •  BSA A75 Rocket III, 1969-1972

Owners of these classic vintage motorcycles now have a reference than can help them take care of their own maintenance and repairs, without having to resort to costly trips to a mechanic. Published by Haynes, the manual covers 1972 Triumph Trident T150V front hand brake removal, fuel system and lubrication, ignition system, frame and forks, the electrical system and wheels, brakes and tires. There are hundreds of photos in this 134-page reference, in addition to wiring diagrams that are clearly rendered and easy to follow. When you purchase the Triumph manual from The Motor Bookstore, you will get it with free shipping to the 48 continental United States.

Book Excerpt: 1969-1975 Triumph Trident T150, T150V, BSA Rocket III Repair Manual


  1. It is not anticipated that the oil pressure release valve should give trouble and require servicing other than periodic cleaning. The valve is located to the rear of the oil pump housing on the base of the engine.
  2. Access to the valve is only possible after stripping the primary transmission. It is necessary to disconnect the oil feed and scavenge pipes at the crankcase. Tape up the ends of the pipes as they are disconnected.
  3. With the valve removed, the hexagonal domed cap can be unscrewed from the valve enabling the piston to be withdrawn.
  4. All parts of the valve should be cleaned in paraffin and thoroughly examined.
  5. The pistons should be checked for score marks and the spring for length and possible fracture. Dimensions are given in the Specifications Section at the beginning of this Chapter.
  6. When reassembling, fit new fiber washers at the valve cap and between the release valve body and the crankcase.

  1. It is necessary to remove the gas tank in order to gain access to the oil cooler, clips and fittings. BSA models have embellished covers on the cooler to remove first.
  2. Do not tilt the cooler until it is clear of the frame and can be drained into a receptacle or oil could be lost.
  3. With the gas tank removed, unscrew the oil pipe clips. The left-hand pipe from the cooler connects to the rocker feed pipe.
  4. The support bracket top bolts should be loosened sufficiently to allow removal of the corner packings. (continued).


If the swing arm is to be removed with the engine still in the frame, proceed as follows:

  1. Remove the side panels.
  2. Disconnect the chain after removing the spring link. Remove the front anchor stay securing bolt from the rear brake torque arm.

    Unscrew the brake operating rod adjuster nut and remove the speedometer cable from the rear wheel drive. Loosen the wheel spindle nuts and take off the wheel.

  3. Remove the large nut from the right-hand engine plate. Remove the two long, two short and the large central bolt from the left-hand engine plate.

    After disconnecting the stop lamp leads, remove the plates.

  4. Loosen the rear chain guard bolt and remove the front chain guard securing bolt.
  5. Remove the two bolts which secure the suspension units to the swing arm and disconnect the rear chain oiler pipe.
  6. To withdraw the swing arm spindle on Triumph models, bend back the tab washer and unscrew the locking nut from the left-hand side of the spindle.

    The spindle should be unscrewed until it is free to be withdrawn. This releases the swing arm which can then be removed and the lipped end plates with "O" rings, outer sleeves and distance tubes removed.

    With the swing arm out of the machine check that it is straight and not twisted.

Subject: 1969, 1970, 1971, 1972, 1973, 1974, 1975 Triumph Trident T150, T150V, BSA A75 Rocket III service, maintenance, repair. ISBN-10: 0856961361 | ISBN-13: 9780856961366 | Haynes 136

  • Publisher: Haynes Manuals
  • Pages: 134 - Hundreds of b&w photos and illustrations
  • Binding: Paperback - 8.5 x 11 inches
  • ISBN: 978-0-85696-136-6
  • Years: 1969 - 1975
Table of Contents
  • Maintenance
  • Engine, clutch and transmission
  • Fuel system and lubrication
  • Ignition system
  • Frame and forks
  • Wheels, brakes and tires
  • Electrical system
  • Wiring diagrams

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Triumph Trident T150, T150V, BSA Rocket III Repair Manual 1969-1975
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