Opening Pressure Test
With testing gauge (US 1111) still connected to injector, move pump lever down slowly. Note pressure at which injection nozzle releases fuel. Nozzle working pressure must be within specifications. Adjust, if necessary, by changing shims. Thicker shims increase pressure, thinner shims decrease pressure.
INJECTOR NOZZLE OPENING PRESSURE
| Model | psi (kg/cm2 ) |
|---|---|
| Turbo Diesel | 2248-2364 (158-166) |
| All Others | 1740-1885 (122-132.5) |
NOTE:
A shim thickness increase of .0019" (0.05 mm) increases pressure by 71 psi (5.0 kg/cm2
)). Shims are available in thicknesses of .039-.070" (1.00-1.95 mm) in .0019" (0.05 mm) increments.