PREVOST H3-41 Maintenance Manual page 119

Clean the sealing surface on the diffuser pipe
before mounting the aftertreatment hydrocarbon
injector.
FIGURE 14: AFTERTREATMENT HYDROCARBON
DOSER
Install the new aftertreatment hydrocarbon
injector and new gasket onto the diffuser pipe
(which attaches to the turbocharger outlet) and
tighten the fasteners.
TORQUE: 120-130 lb-in (14-15 Nm)
NOTE
The fasteners already include pre-applied
high-temperature anti-seize compound.
3. Connect the line to the aftertreatment
hydrocarbon injector. Tighten the line fitting.
TORQUE: 177-213 lb-in (20-24 Nm)
4. Install the P-clamp and fasteners to secure
the line to the mounting bracket on the
diffuser pipe.
5. Start the engine, build air to operating
pressure. Start the service regeneration
process. When fuel dosing starts, check for
leaks starting on the hot side of the engine.
Clear any diagnostic trouble codes, if needed.
NOTE
If fault tracing was performed using Guided
Diagnostics, return to Guided Diagnostics for
repair verification.
SECTION 04 : EXHAUST AND AFTERTREATMENT
PA1621 Maintenance Manual All Series | Section 04 revised Feb 2019 25