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Diesel Engines

  1. Ensure batteries are fully charged to avoid run-down. Check engine compression through at least 6 compression strokes to obtain reading.
  2. Remove air cleaner. Install air crossover screened cover (J-26996-1). Disconnect electrical lead from fuel solenoid terminal of injection pump. Disconnect glow plug wires. Remove all glow plugs.
  3. Use compression tester (J-26999) to test cylinders. Compression should build evenly and rapidly to proper level while rotating engine. If piston rings are worn or cracked, compression will read low on 1st stroke, will rise each stroke thereafter, but will not reach normal level.
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