Mack ASET AC, Руководство по обслуживанию

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Page 152
REPAIR INSTRUCTIONS, PART 1
7. Disconnect the fuel lines at the inlet and
outlet ports at the top of the cooling plate
(Figure 133) and position the lines
out-of-way.
Use care when disconnecting the fuel lines to
avoid putting stress on the plate fittings and
damaging the plate. Use two wrenches, one to
support the plate fitting and the second to
disconnect the line.
133
Figure 133 — Cooling Plate Fuel Lines
8. Loosen the two retaining nuts securing the
plate support bracket to the mounting studs
on top of the coolant manifold. The bracket
has slotted attachment points so the
retaining nuts need only to be loosened and
not removed.
9. Remove the two retaining nuts from the
mounting studs at the bottom of the cooling
plate and remove cooling plate assembly.
EGR Gas Tube Removal
[214 HN, HP & HR]
Effective 1st quarter 2004, the EGR cool tube is
no longer a two-piece unit. The center coupling
has been eliminated and the couplings at the
mixer tube and EGR cooler are hose connections
held in place by clamps.
The following procedure covers the removal of
the EGR gas tubes in order of:
앫
Cool tube, one-piece assembly
앫
Hot tube
COOL TUBE REMOVAL (ONE-PIECE
ASSEMBLY)
1. Disconnect the turbocharger oil supply line
and the air line to the VTG actuator at the
turbocharger (Figure 134). Plug the fittings
to keep dirt and debris out.
134
Figure 134 — Oil Supply and Air Lines
1. Cooling Plate
2. Fuel Line 3. Thermostat Housing
1. Turbocharger Oil Supply
Line
2. VTG Actuator Air Line
5-111.bk Page 152 Monday, July 10, 2006 2:26 PM