50-2 Operation D7x11 Series II Navigator Directional Drill
COLD WEATHER STARTING
Engine Cold Weather Starting
Before operating in cold weather, refer to the Engine Operation Manual for recommended engine oil, fuel, and
starting procedures.
IMPORTANT: Do not use starting fluid or ether.
Turn ignition switch to RUN position, wait for glow plug light to go out, then start engine.
Gradually increase engine RPM for up to 30 minutes to allow hydraulic oil to warm up. To assist in warming the
hydrostatic system, force oil over relief by deadheading the stabilizer or rack angle cylinder. Partially engage
hydrostatic circuits to turn the hydrostatic motors slowly while warming the oil.
NOTE: Slow engine down if hydraulic pump squeals because it does not get enough oil.
Hydraulic Fluid Cold Weather Starting
Refer to Specifications section, “Lubricants,” in the Maintenance Manual for recommended hydraulic fluids.
When using ISO 68 hydraulic fluid below +23°F (-5°C) or ISO 100 hydraulic fluid below +41°F (+5°C), warm up engine.
For frequent starts below 10°F (-12°C), consult your Vermeer dealer.
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