Weber 2V TLD carburettor automatic choke unit - removal and refitting
Removal
1 Remove the air cleaner.
2 Release any pressure in the cooling system by loosening the pressure cap, then detach the water inlet and outlet hoses at the automatic choke unit. Clamp the hoses or position them with their ends facing upwards to minimise coolant leakage.
3 Disconnect the lead at the anti-run-on valve solenoid.
4 Disconnect the fuel supply and return hoses at the carburettor. If crimped type hose clips are used, cut them off and use screw type clips at reassembly.
5 Undo the six carburettor upper body retaining screws and remove the upper body. Note that four of the screws are of the Torx type and a suitable key or socket bit will be needed for their removal.
6 With the upper body removed, undo the three screws and remove the choke bi-metal coil housing followed by the internal heat shield.
Choke bi-metal coil housing retaining screws - Weber 2V TLD carburettor
7 Undo the three screws securing the choke housing to the upper body,
Vacuum pull-down housing (A) and choke housing retaining screws (B) - Weber
2V TLD carburettor
disconnect the link rod and remove the choke housing.
8 Undo the three screws and remove the vacuum pull-down housing cover, then withdraw the spring, diaphragm and operating rod assembly.
9 Make a note of the exact position of the choke mechanism return and tension springs, then undo the nut and remove the connecting rod, levers and link from the choke housing.
Exploded view of automatic choke - Weber 2V TLD carburettor
A Operating link
B Fast idle cam return spring
C Spindle sleeve
D Connecting rod and lever
E Pull-down link
F Actuating lever
G O-ring seal
10 Clean and inspect all the parts for wear, damage, cracking or distortion. Pay particular attention to the condition of the pull-down diaphragm and the choke housing O-ring seal. Renew any parts as necessary.
Refitting
11 Reassemble the choke mechanism connecting rod, levers, link and springs. Secure the assembly with the retaining nut.
12 Locate the vacuum pull-down diaphragm and operating rod in the choke housing and with the diaphragm lying flat on the housing face, refit the cover and secure with the three screws.
13 Locate the O-ring seal on the choke housing, then connect the housing to the link rod.
14 Position the housing on the carburettor upper body and secure with the three screws.
15 Refit the upper body to the carburettor.
16 Before refitting the bi-metal coil housing, adjust the vacuum pull-down (see unit adjustment), then fit the coil housing.