6C–10 ENGINE FUEL
9.Set the nozzle holder to the nozzle tester.
10.Operate the nozzle tester. Measure the first nozzle
opening pressure.
11.If the first nozzle opening pressure is not as
specified, disassemble the nozzle holder and
remove the shim. Replace the shim with a new shim
that adjusts the opening pressure to the specified
level.
CAUTION: Use a micrometer to measure shim
thickness.
• First nozzle opening pressure adjusting shims
Part No. (ZEXEL) Thickness (mm)
150590-0600 0.40
150590-0700 0.50
150590-0800 0.52
150590-0900 0.54
150590-1000 0.56
150590-1100 0.58
150590-1200 0.60
150590-1300 0.70
Full needle valve lift confirmation
1. Install the gasket (1) and plug (2) to the adjustment
retaining nut.
Gasket: 026508-1140 (ZEXEL)
Plug: 157892-1600 (ZEXEL)
2. Position the nozzle holder with the nozzle facing
down. Install the dial gauge holder to the nozzle
holder.
Dial gauge holder: 157892-4400 (ZEXEL)
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