Mack ASET AC - VTG Position Control Valve Removal

Page 162
REPAIR INSTRUCTIONS, PART 1
7. Remove the water pump stiffening bracket
by first removing the two M8 flanged nuts
from the studs at the forward position of the
coolant manifold. Then remove the M8
flanged nut from the backside of the A/C
compressor upper mounting stud to release
the water pump stiffening bracket. Refer to
Figure 148.
8. Support the pump housing and remove the
two bottom mounting and two mid-position
mounting bolts.
9. Remove the housing from the cylinder block
(Figure 151).
151
Figure 151 — Water Pump Housing Removal
VTG Position Control Valve
Removal
[214 QB]
Refer to Figure 152 for reference in removing and
installing the VTG position control valve.
1. Disconnect the harness electrical lead from
the terminal on the control valve assembly.
2. Disconnect the VTG position actuator air line
from the valve.
3. Loosen and remove the two capscrews
attaching the valve to the inlet manifold.
Remove the valve from the manifold.
4. Check the valve for proper operation.
Replace as required.
152
Figure 152 — VTG Position Control Valve
1. Lifting Bracket
2. Cylinder Head
3. Water Pump Housing
1. Outlet Port
2. Electrical Connector
3. Air Inlet Port
4. Mounting Capscrews
5. Air Bleed Port
5-111.bk Page 162 Monday, July 10, 2006 2:26 PM