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C Prying with a screwdriver will damage the gasket. This will allow
8-2
Flushing Option #1
This option requires two pipe nipples at least 4" (102 mm) long with
NPT threads on one end.
•
Remove the filter elements from the front of the muffler box and screw
the nipples into the same holes.
•
With the pump running, allow about 2 tbsp. of flushing solvent to be
ingested into the vacuum side of the unit.
•
Repeat the flushing procedure. If it does not correct and clear the pump,
remove the end plate for further examination.
Flushing Option #2
•
Remove the filter elements from the front of the muffler box.
•
Carefully remove the five bolts that hold the muffler box in place (be
careful not to damage the gaskets). Tap the box with a small hammer to
break it loose.
access to the intake and exhaust ports.
•
Follow through with steps 2 and 3 for Flushing Option #1.
Pump Disassembly
Pump disassembly is required if flushing does not remove the foreign
materials.
•
Disconnect the power to the pump motor.
•
Remove the six bolts holding the end plate to the body.
•
Remove the end plate and the four vanes (do not remove the rotor or
loosen any electric motor through-bolts).
•
The vanes could be worn or only require further cleaning. The top
clearance (between rotor and body) may be adjusted by:
•
Loosening the body bolts.
•
Lightly tapping on the pump body and turning the rotor, while setting
this clearance, to assure that all points on the rotor clear the body.
Pump Checkout
If the pump does not activate when the G button is pressed, see the
Diagnostics section, then:
•
Ensure that the exposure frame is in its full outward position.
Check for G switch continuity at the switch connector. The switch
•
harness connector is under the nose assembly, where it meets the front
bulkhead.
•
Check if the vacuum pump LED is lit at the control box. If so, check for
voltage at the pump. If voltage is present at the pump connector, but the
pump fails to operate, replace the pump. If the control box LED is not
on, check the wiring and connections from the switch to the control box.
94MS41 Rev. C1 S/W Ver 2.06
3/
"
8
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