Mack ASET AC, Service Manual, Page: 172 / 536

REPAIR INSTRUCTIONS, PART 1
Page 159
EGR Valve Removal
[214 QE]
1. Disconnect the electrical lead from the
terminal on the EGR valve.
Current-production engines are equipped with the
one-piece cool tube assembly arrangement
which utilizes spacer studs and a cool tube
mounting bracket installed above the EGR valve
mounting block (Figure 146. The bracket and
spacers are removed before removing the valve.
146
Figure 146 — EGR Valve (Shown with One-Piece Cool
Tube Mounting Bracket)
2. Remove the three nuts retaining the EGR
valve upper mounting bracket to the spacer
studs and remove the bracket and washers.
3. Remove the three spacer studs supporting
the cool tube upper mounting bracket from
the EGR valve mounting studs.
4. Remove the four nuts retaining the EGR
valve assembly to the exhaust manifold and
remove the valve assembly (Figure 147).
Remove and discard the metal gasket from
the manifold.
147
Figure 147 — EGR Valve Removal
5. Inspect the valve assembly for damage and
test as required. Replace the assembly if
necessary.
1. EGR Cool Tube Upper
Mounting Bracket
2. Spacer Studs
3. EGR Valve Mounting
Nuts
4. EGR Valve
1. EGR Valve Assembly 2. Exhaust Manifold
5-111.bk Page 159 Monday, July 10, 2006 2:26 PM