Fuel Injection Nozzle Reassembly; Adjusting Fuel Injection Nozzle; Adjusting Opening Pressure - Takeuchi TB 175 Handbuch

5.5. Fuel injection nozzle reassembly

The fuel injection nozzle is reassembled in the opposite order to disassembly.
(1) Insert the adjusting shims, nozzle spring and nozzle spring seat in the nozzIe holder，mount the stop plate with the pin
i nsert the nozzle body/nozzle set and tighten the nut.
(2) Use the special holder when tightening the nut for the hole type nozzle as in disassembly.
Nozzle nut tightening torque
Hole type nozzle

5.6. Adjusting fuel injection nozzle

5.6.1. Adjusting opening pressure

Mount the fuel injection nozzle on the nozzle tester and use the handle to measure injection starting pressure. If it is
not at specified pressure, use the adjusting shims to increase/decrease pressure（both hole and pintle types).
Ajusting by 0.1 mm results in a change in the injection starting pressure of about 2 Mpa ( 20 kgf / cm
N-m(kgf-m)
39 – 44 ( 4 – 5 )
Injection starting pressure
Injection starting pressure
Remark ) Injection starting pressure changes on enjine specifications.
53
)
2
MPa(kgf/cm
19.6 - 20.6 ( 200 – 210 )
21.6 – 22.6 ( 220 – 230 )
2
)