Hino 238, Руководство по ремонту

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DEF SCR SYSTEM (DCU) 5–271
1. Set the starter switch to the "LOCK" position.
2. Replace with a new back flow valve of the DEF pump.
3. Connect the SST2 again between the DEF tank (1) and the DEF
pump (2).
4. Set the starter switch to the "ON" position.
5. Perform the [Leak test] as same as step 2.
NO YES
5
Inspect the DEF pressure 2 (Inspection of the DEF pump) [Hino-DX]
Back flow
connector
81 mm {3.19 in.}
φ
25 mm
{0.98 in.}
(2)
(1)
DEF
sensor
SST2
SAPH16F020400185
Measurement
conditions
Standard values
Starter switch: ON
The DEF pressure is stable in the 8,500
to 9,500 hPa (123.3 to 137.8 psi) range
for 60 seconds.
Do the measurements meet the standard value?
Procedure completed.
Perform "After-inspection work" of INFOR-
MATION section. Replace the DEF pump.
Perform "After-inspection work" of INFOR-
MATION section.