Toro 325-D, 345 manual Injection Nozzles

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TORO GM 325-D	Mitsubishi K3D Diesel Engine 29

Injection Nozzles.

The diesel engine requires that the fuel be sprayed into the combustion chamber, at a precise point in the compression stroke. The point at which this fuel injection occurs is the injection timing. If the nozzle is defective, damaged, or adjusted incorrectly, the injection timing can be affected. This can cause hard starting, low power output, excessive smoke or engine knocking.

IMPORTANT: Always use fresh filtered fuel in the nozzle tester. Use of dirty fuel can damage the precision parts of the injector nozzle.

Injection nozzle tests:

The nozzle tester forces fuel from the nozzle under extremely high pressure.

Always point the nozzle away from your self and any other personnel.

To prevent possible injury always wear safety glasses.

1.Pressure test.

The injection nozzle is connected to the nozzle tester and the nozzle opening (Cracking) pressure is measured. The pressure at which the injection nozzle opens has a direct effect on the injection timing and the fuel spray pattern.

∙Minimum opening pressure 120 kg/cm² (1700 psi). Maximum opening pressure 130 kg/cm² (1850 psi).

∙Nozzle opening pressure can be adjust by adding or removing shims.

2.Chatter Test.

With the nozzle connected to the nozzle tester, pump the tester slowly, the nozzle will open and close rapidly (Chatter).

∙The chatter test checks the ability of the nozzle to open and close at a high rate of speed.

∙A nozzle that does not chatter, may be the result of binding or a bent nozzle.

Notes

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Contents Groundsmaster 345/325-D Index Product Overview Toro GM Attachments Ford VSG-411 Gas Engine Engine Identification Toro GM Checking Idle Speeds High and Low Idle ChecksToro GM Ford VSG-411 Gas Engine Correction Carburetor linkage adjustmentToro GM Ford VSG-411 Gas Engine Toro GM High Idle Adjustment Toro GM Governor Spread or Sensitivity Adjustment Anti-Surge AdjustmentToro GM Cylinder Leakage Test Compression TestingSpecial tools Review Questions Mitsubishi K3D Diesel Engine Toro GM 325-D Mitsubishi K3D Diesel Engine Analyzing Diesel Exhaust Smoke Mitsubishi K3D Diesel Engine Troubleshooting Mitsubishi K3D Diesel Engine Troubleshooting Mitsubishi K3D Diesel Engine Injection Nozzles Mitsubishi K3D Diesel Engine Toro GM 325-D Mitsubishi K3D Diesel Engine Toro GM 325-D Mitsubishi K3D Diesel Engine Glow Plug Testing Special Tools Study Questions Hydraulics Toro GM 345 / 325-D Charge Circuit Hydrostatic Drive and Hydraulic SystemsDrive circuit Drive Circuit Acceleration valves Relief Valve Acceleration valvesHydraulics Toro GM 345 / 325-D Low charge pressure Drive Pressure Test Low drive pressure. Charge pressure OK Charge Flow Test Low charge flow charge pressure OK Hydraulics Toro GM 345 / 325-D Steering Circuit Hydraulics Toro GM 345 / 325-D Cutting Unit Lift Circuit Special Tools Study Questions Electrical Systems Toro GM 345 / 325-D Start Circuit. GM 345 Shown, 325-D similar Electrical System GM 345 / 325-DInterlock Circuit Normal Operation Electrical Systems Toro GM 345 / 325-D PTO Engaged, Operator Not In The Seat Electrical Systems Toro GM 345 / 325-D Toro GM 345 / 325-D Electrical Systems Electrical Systems Toro GM 345 / 325-D Seat Switch and Traction Neutral Switch Testing Electrical Systems Toro GM 345 / 325-D Electrical circuit breaker Special Tools Helpful Hints Review Questions Cutting Unit Drive Toro GM 345 / 235-D Attachment Drive PTO Cutting Unit Drive Toro GM 345 / 235-D Troubleshooting Cutting Units Toro GM 345/325-D Recycler Deck Spindle serviceRear Discharge & Side Discharge Cutting Units Toro GM 345/325-D Inspecting and Sharpening Rotary Mower Blades Quality Of CutCutting Units Toro GM 345/325-D Inconsistent height of cut Mismatch cutSpecial tools Helpful Hints Review Questions Commercial products