6C – 2 FUEL SYSTEM
MAIN DATA AND SPECIFICATIONS
Description
Item
4JA1T (L) 4JA1TC 4JH1TC
Injection pump type
Bosch distributor
VE type
Bosch distributor VP44 type
Governor type Mechanical variable
(Half speed oil
pressure)
Electrical controled
Timer type Oil pressure Electrical controled
Fuel feed pump type Vane with input shaft
Injection nozzle type Hole type
Number of injection nozzle orifices 5
Injection nozzle orifices
Inside diameter mm (in) 0.19 (0.0075) 0.17 (0.0067) 0.21 (0.0083)
1st 19.1 (195) 19.0 (194) 19.5 (199)
Injection nozzle designed operating
pressure MPa (kg/cm
2
)
2nd 25.0 (255) 33.5 (328) 33.8 (331)
Main fuel filter type Disposable cartridge paper element
Precautions
When working on the fuel system, there are several things
to keep in mind:
•
ny time the fuel system is being worked on,
disconnect the negative battery cable except fo
those tests where battery voltage is required.
•
lways keep a dry chemical (Class B) fire
extinguisher near the work area.
• Replace all pipes with the same pipe and fittings that
were removed.
• Clean and inspect O-rings. Replace if required.
•
lways relieve the line pressure before servicing any
fuel system components.
• Do not attempt repairs on the fuel system until you
have read the instructions and checked the pictures
relating to that repair.
• Adhere to all Notices and Cautions.
NOTE:
Injection nozzle adjustment is possible only on the 4JA1L
engine.
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