Toyota 1HZ Repair Manual

FU-70 FUEL SYSTEM Injection Pump
ADJUSTMENT OF INJECTION PUMP
1. PRETEST CHECK AND PREPARATION
(a) The specifications for test nozzle and nozzle holders
are as follows.
Test nozzle: DN12SD12 (NIPPONDENSO)
Test nozzle opening pressure:
145-155 kg/cm
2
(2,062- 2,205 psi, 14,220-15,200 kPa)
(b) Check the accuracy of the tachometer.
Allowable error: ± 40 rpm
(c) Install the angle gauge stand.
(d) Mount the injection pump body on the pump tester.
HINT: Place a mark on the key groove portion of the
coupling.
(e) Install an injection pipe with the following specifica-
tions.
Outer diameter: 6.0 mm (0.236 in.)
Inner diameter: 2.0 mm (0.079 in.)
Length: 840 mm (33.07 in.)
Minimum bending radius: 25 mm (0.98 in.) or more
(f) Remove the fuel inlet hollow screw.
(g) Connect the fuel inlet pipe with an adapter.

Toyota 1HZ Specifications

General

Fuel Type	Diesel
Maximum Power	96 kW (129 hp) at 3800 rpm
Firing Order	1-5-3-6-2-4
Aspiration	Naturally aspirated
Fuel System	Direct injection
Cooling System	Water-cooled
Displacement	4.2 L (4164 cc)
Maximum Torque	285 N·m (210 lb·ft) at 2200 rpm
Valvetrain	SOHC, 12 valves (2 per cylinder)