Maintenance - Cambelt, Hydraulics Bleeding the fuel system The injection pump on the TDI engine is self priming, however, should you change the filter or run out of fuel, the system may need bleeding as far as the fuel filter. A hand pump is fitted to the engine for this purpose.(see below). 1. Slacken off the bleed screw on top of the fuel filter. 2. Operate the lever on the lift pump repeatedly until air-free fuel flows from the filter outlet. 3. Tighten the bleed screw on top of the fuel filter. 4. Start the engine as normal but avoid turning the engine over continually for above 20 secs to avoid damage to the starter motor - it may take several attempts. Fuel lift pump lever Valve clearances. The valve clearances on the TDI engine require adjustment every 600hrs. The clearance for both inlet and outlet valves is 0.2mm Camshaft / injection pump drive belt. The camshaft drive belt should be replaced as a matter of course every 1200 hours. This routine work can be carried out by either ourselves, by some of our main dealers or by your nearest LandRover dealer. Special tools are required and the job should not be attempted without these tools and the appropriate service manual. Failure to replace the cam belt at the recommended intervals or failure to follow the correct fitting procedure can lead to belt failure which will result in serious and costly engine damage. Hydraulic system. The standard hydraulic system develops a maximum of 6hp (at the PTO) Please consult the manufacturer if you wish to drive anything other than a conventional diaphragm sprayer pump or Vicon, Lely Centreliner or Amazone twin disc fertiliser spreaders. Do not alter the relief valve settings on either the spool valve or flow divider without consulting the manufacturer. They are preset at: PTO flow control (main relief) 2000 PSI, Spool valve relief valve 1200 PSI, front steering 1250 PSI and rear steering 1450 PSI. See appendices for information on uprated and non-standard hydraulic systems. < 35 >