Finally finding time to tinker with the XM818.
With new batteries in her all the electrical seems A-OK. Even confirmed she has power to the Fuel Solenoid. So now chasing the fuel system.
The EMERGENCY Fuel Cut-Off Cable and Valve are both functioning properly and I've confirmed the Fuel Cut-Off Valve is in the "Run" position.
Primer Pump would hardly budge the Fuel Pressure Gauge's Needle, so I replace the Primer Pump's O-Rings. Now the Primer Pump will make, BUT NOT HOLD 30 P.S.I. with vigorous pumping..... even without cranking the engine AND without the glow plug energized.
Looks like it's on to the Selector Valve and Rubber Hose inspection/replacement as my next indicated step(s).
THANK YOU for the wealth of information archived in this thread. More on this as we progress towards "The Shepherd's" RESURRECTION !!!
Thanks for that input, tractors0130.Dash primer will not hold pressure since it will bleed off for starting while glow plug is energized.
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