Mack MP7 - Page 105

Page 94
MAINTENANCE
6. Remove the fasteners that secure the DPF
lower supporting bracket to the chassis
frame bracket. This releases the weight of
the DPF onto the transmission jack.
85
Figure 85 — Removing DPF from Chassis
7. Lower the DPF unit and roll the transmission
jack from the right side of the chassis to
remove the lower portion of the DPF.
8. Loosen the nut securing the large V-band
clamp between the exhaust outlet module
and the filter module.
9. Separate the DPF from the outlet module.
10. Remove and discard the gaskets.
11. Inspect and replace the V-band clamps
showing galled threads, cracks or heat
damage. Clean all exposed gasket surfaces.
Installation
1. Install a new gasket between the outlet and
DPF modules.
2. Using alignment marks made at
disassembly, position the DPF over the
outlet module and connect using the V-band
clamp tightened to specifications.
Make sure the high-temperature gasket remains
in place and has not become dislodged.
3. Place a new high-temperature gasket on top
of the DPF module.
4. Perform the following steps to align and lift
the filter and outlet module assembly into
position:
앫 Align the outlet module flange to the
exhaust pipe.
앫 Align the locator tab at the filter module
with the slot located in the bottom of the
catalyst module.
앫 Start all fasteners that connect the
lower supporting bracket to the chassis
frame bracket.
5. Install the V-band clamp that joins the DPF
and catalyst modules. Tighten the band
clamp fastener to specification.
Make sure the high-temperature gasket remains
in place and has not become dislodged.
6. Install and tighten the V-band clamp that
joins the outlet module to the exhaust pipe.
86
Figure 86 — Exhaust Pipe-to-Outlet Module Connection