Testing a Solenoid Valve To test the solenoid valve in an individual strut, perform the following steps: • turn the ignition switch to OFF, • connect a fused jumper wire between a known good ground and the strut solenoid’s terminal in the control unit connector (back-probe connector at the control unit, do not disconnect) • connect a fused jumper wire between a known good ground and the air charge solenoid’s terminal in the control unit connector (back-probe connector at the control unit, do not disconnect), • turn ignition switch to ON.
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The intent of this bulletin is to provide technicians information regarding the proper installation of the Heating, Ventilation and Air Conditioning (HVAC) Module blower motor (with impeller) assembly.
The current available HVAC Module blower motor for the above listed vehicles can be identified by the three mounting holes (1). The original equipment blower motor had five mounting holes.
In order to avoid confusion and ensure a high level of customer satisfaction, when replacing an HVAC Module blower motor, refer to this bulletin for the appropriate procedure.
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Piping
1. When piping, please use I.D. equivalent to or larger than NPT size on the Namur valve.
2. Before piping, flush the system to remove dust, scale, chips, seal tape, etc. in the pipe line both on the supply side (supply pressure port side) and secondary side (operation equipment port side).
3. For three-position closed center, perfect check valve, check for leakage from piping and fittings in-between valve and cylinder by means of soapy water to ensure that there is no leakage. Also, check the leakage from cylinder rod seal and piston seal. If there is any leakage, the cylinder (when the valve is de-energized) may move without stopping at mid-position. Therefore, leakage from piping and fittings should be completely removed. When applying teflon sealing tape to the thread area, wind it around the thread area 1-2 times while ensuring the thread extends one or two screw pitches beyond the taped area. Also, when applying liquid seal materials, leave 1-2 threads from the end, and avoid over-application. Never apply to the female side of the equipment.
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FRONT STRUT REMOVAL
1. Loosen the front wheel lugnuts.
2. Raise the vehicle and support it on jack stands.
3. Remove the front wheels.
4. Disconect the air line fitting and unplug the electrical connectors for the height sensor and solenoid.
5. Then vent the air from the bag.
6. Be sure to mark the position of the strut at the bottom where it bolts to the spindle.
7. Remove the nuts and bolts from the strut.
8. Be sure to disconnect the brake hose from the strut.
9. Now remove the upper three nuts where it attaches to the shock tower.
10. Now dismount the strut from the vehicle.
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