Hino Motors J08E-VC, Руководство по ремонту

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EXHAUST SYSTEM (J08E) EN04–28
3. DPR differential pressure check
(1) Check the DPR differential pressure through the "DPR Status" dis-
play.
(2) Confirm the exhaust gas temperature (in and out) is less than 200

C
{392

F}.
(3) Engine speed will rise automatically, then record the indicated maxi-
mum DPR differential pressure.
(4) In case the central value of the recorded DPR differential pressure
value exceeds the specific value, clean or replace the filter.
Then "Stop" the DPR differential pressure check.
Specific value
(5) When the differential pressure is unchanged check the following.
If the following are normal, the differential pressure sensor should be
replaced.
a.
Check differential pressure hose for cracks or hole openings.
b. Check that the hose clamp is neither loose nor disconnected.
c. Check whether there is clogging in the differential pressure pipe
(DPR cleaner side).
Use the compressed air from one end of the pipe to check for
clogging. If the air passes to the other side easily, it is clear.
Engine speed
(no load maximum revolution)
Differential pressure inspection
standard value
(kPa {kgf/cm
2
, lbf/in.
2
})
2,800 r/min. 5.0 {0.05, 0.7}