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Series Land Rover Accelerator Linkage

We tend to take the accelerator linkage for granted and assume everything is OK, but with the mechanism often being 30+ years old, wear has often set in and it can affect vehicle performance.
If we have noticed the vehicle accelerate more slowly than it used to, lack power intermittently or noticed a drop in top speed, then the accelerator linkage should be checked as a possible source of these problems. It may be a simple adjustment of the linkage that is
needed rather than a thorough strip down and overhaul of the carburettor on a petrol engine or inspection of the injectors, pump and filters on a diesel engine.


The first check to carry out is to see if the throttle can be fully opened. The procedure is the same for petrol and diesel engines. Just put a brick or other suitable heavy object on the accelerator pedal to fully depress it and check under the hood that the linkage has transmitted the required leverage to the carburettor or diesel pump. At this point it should be noted that you should have an accelerator pedal stop in place to prevent undue stress on the linkage. One may have been fitted by Land Rover originally, but may have gone missing over the years. If there is no pedal stop fitted then you need to determine how far the pedal can be safely depressed without stressing the linkage.
The pedal design in the photo allows for maximum travel to contact the floor but if soft carpeting is used then a pedal stop provides a more positive limit. Pedal height can be adjusted on its attachment bar. The two threaded linkage rods (1 in photo above left) provide further adjustment if their threads are not seized up. Pedal stops are not difficult to fabricate from a suitable bolt, nuts and large washers(photo above right).

  A fault that can mascarade as a badly slipping clutch may be due to the carburettor relay lever being worn and slipping (arrowed). The version shown is only a press fit on the shaft and if replacement parts are not available then it can be solved by drilling through the flange and into the bush and fixing its position with a roll pin. It pays to check this linkage occassionally to make sure all linkage movement is passed through to the carburettor control rod. The fault can seriously limit your engine power and top speed.





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Fascinating facts
(No.117 )

The Austin Gypsy was planned as a competitor to the Land Rover in 1958.

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