Toyota 1HD-FT Repair Manual page 132

ENGINE - FUEL SYSTEM
EG-119
-
fi
. .
•
' .
Faulty
Good
If the opening
preSSure
is not as specified. disassem-
ble the nozzle and change the adjusting shim on the
top of the NO.2 pressure spring.
Adjusting shim thickness mm (in.):
0.700 (O.O278)
0.850 (0.0335)
1.000 (0.0394)
1.025 (0.0404)
1.150 (0.0453)
1.175 (0.0463)
1.275 (0.0502) 1.300 (0.0512)
1.425 (0.0561)
1.450 (0.0571)
1.575 (0.0620) 1.500 (O.Oe30)
1.725 (O.oe79) 1.750 (O.O689)
1.900 (0.0748)
2.050 (0.0807)
HINT:
• Varying the adjusting shim thickness by 0.025
mm
(0.0010
in.) changes the injection pressure
by about 470 kpa (3.8 kgf/cm
2
•
54 psi).
• Only one adjusting shim should be used.
(9) There should be no dripping after injection.
(h) After checking the No.2 opening pressure, disassem-
ble the nozzle.
3. ADJUST NO.1 OPENING PRESSURE
(aJ Assemble the nozzle holder body. adjusting shim for
adjustment of No.1 opening pressure. No.1 pressure
spring, No.1 pressure pin. adjusting shim, No.1 pres-
sure spring seat. adjusting shim selected in step 2
above, No.2 pressure spring, adjusting No.2 pressure
spring seat selected in step " B, tip packing, straight
pins, adjusting shim selected in step 1. A and nozzle
assembly, and finger tighten the retaining nut.
HINT:
• Align the holes of the nozzle body. the distance
piece and the nozzle holder body.
• When the thickness of the originally used adjust-
ing shim is not known. use a shim 1.5
mm
(0.59
in.) thick instead.
(b) Read the pressure gauge just as the injection pressure
begins to drop.
(See steps (b) to (f) in step 2 above)
No.1 opening pressure:
17.652 -18.633kpa(180 - 190kgf/cm', 2.560 -
2.702 psi)
HINT: Proper nozzle operation can be determined by a
swishing sound.
If the opening pressure is not as specified. disassem-
ble the nozzle and change the adjusting shim on the
top of the No.1 pressure spring.
EG