Removing The Fuel Tank; Removing The Fuel Pump; Construction Of The Fuel Pump - MG MGA Twin Cam Workshop Manual

85. Pivot bolt for cam.
86. Spring washer for pivot bolt.
87. Cam.
88. Throttle spindle connector
(rear half).
89. Bolt for throttle spindle
connector.
90. Spring washer.
91. Nut.
92. Connecting rod.
D.1 REMOVING THE FUEL TANK
Remove the hexagon drain plug and empty the tank.
Slacken the two clips on the filler neck hose and withdraw the filler extension.
Pull the hose from the tank. Take out the three screws and remove the tank filler neck seal and clamp
plate.
Disconnect the fuel pipe at the union and the fuel gauge cable from the tank unit, each on the right-
hand side of the tank.
Remove the two nuts from the bolts securing the rear of the tank to the anchorage brackets on the
frame and remove the two bolts with spring washers which secure the front of the tank to the frame.
Withdraw the rear bolts and distance tubes.
Replacement is a reversal of the above instructions.
D.2 REMOVING THE FUEL PUMP
Raise the hood and remove the spare wheel.
Remove the hood stowage compartment floor. This is secured by two quick-release screws and each
requires only a quarter-turn anti-clockwise to release the cover.
Disconnect the inlet and outlet pipe union nuts.
Disconnect the earth lead and the supply lead from the terminals on the pump.
Remove the two set screws securing the fuel pump to the bracket on the frame cross-member.
D.3 CONSTRUCTION OF THE FUEL PUMP
The fuel pump is a 12-volt electric S.U. type LCS and is located close to the right-hand side of the fuel
tank.
The pump consists of three main assemblies: the body, the magnet assembly, and the contact
breaker.
The body (17) is an aluminium die-casting, to which two identical cover-plates (6 and 18) are secured
by six 2 BA screws with spring washers. Removal of the lower cover-plate (18) gives access to the
fuel filter (see Fig. D.5), whilst the top plate covers the outlet valve cage (5). When the outlet valve
cage is removed the inlet valve (3) is revealed. The valves consist of thin brass discs which should be
assembled smooth side downwards.
The outlet valve can be extracted after the spring retaining circlip has been detached. Care should be
taken not to distort the circlip, or the correct valve lift may be affected.
A 1 in. diameter hole connects the space between the valves to the pumping chamber, which is a
shallow depression in one face of the body casting. This space contains the diaphragm unit (20)
93. 4 BA bolt.
94. 4 BA nut.
95. 4 BA washer.
96. Connecting link.
97. Lever-throttle spindle.
98. Bolt-throttle spindle lover.
99. Washer,
100. Nut.
93
101. Stop lever (rear).
102. Taper pin for stop lever.
103. Spring for stop adjusting screw.
104. Stop adjusting screw.
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