Air bleeding from fuel (automatic air-bleeding system)
1. For the automatic air-bleeding system
When the starter switch is set to “OPERATION”, the
electromagnetic pump is activated to force-feed fuel
to the fuel pipe and the leak-off pipe, and air in the
fuel system is automatically bled.
2. For non-automatic air-bleeding system
While sending fuel by means of the force of the elec-
tromagnetic pump, the fall from the fuel tank or the
feed pump lever, bleed air out of the fuel pipe eye
bolt of the No. 1 cylinder injection pump, the leak-off
pipe eye bolt of the injection nozzle and the air-
bleeder plug of the fuel filter, starting with the one
installed the lower most and upward.
1. Operate the engine to warm-up until the coolant
temperature reachs to 75°C (167°F).
2. Remove all of the glow plugs and the injection
pipes.
3. Attach a compression gauge to the No. 1 cylinder
glow plug installation threads.
Note:
Compression pressure may be measured starting at any
cylinder and in no particular cylinder order. However, it
is very important that the compression pressure be
measured in each cylinder.
Therefore, start at the No. 1 cylinder and work back. In
this way, you will be sure to measure the compression
pressure in each cylinder.
Compression Gauge 5-8840-2675-0
Compression Gauge Adapter 5-8840-9029-0
4. Crank the engine with the starter motor and take the
compression gauge reading.
MPa (kgf/cm
2
/psi) at 250 min
-1
Standard Limit
3 (31/440) 2.5 (26/370)
5. Repeat the procedure (.Steps 3 and 4.) for the
remaining cylinders.
Compression pressure should be approximately the
same for each cylinder. A variation exceeding 200
kPa (2.0 kg/cm
2
/.28 psi.) is unacceptable.
If the measured value exceeds the specified limit,
the related parts must be checked.
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