Simply put,
With the float in the down position: the pilot valve is
OPEN; the automatic shutoff valve is OPEN; and the
automatic water drain valve is CLOSED.
With the float in the horizontal position: the pilot
valve is OPEN; the automatic shutoff valve is OPEN;
and the automatic water drain valve is OPEN.
With the float in the up position: the pilot valve is
CLOSED; the automatic shutoff valve is CLOSED;
and the automatic water drain valve is OPEN.
TROUBLESHOOTING
THE
FILTER
HYDRAULIC CONTROL SYSTEM.— If the
system fails to operate properly, make the following
tests:
1. Check the arrows on the automatic shutoff, pilot,
and automatic water drain valves to ensure proper
installation.
2. Make sure all manually operated valves are
properly aligned.
3. Inspect the tubing for dents, flat spots, or internal
obstructions.
NOTE
The latter is often the most likely cause
of the malfunction.
If the above tests prove unsatisfactory, the
rotary control valve should be removed for inspection
and further testing. Cunsult the appropriate
technical manual.
First-Stage Filters
First-stage filters (fig. 4-25) are commonly
known as reclamation filters. That is because these
filters are typically used in the JP-5 reclamation
Figure 4-25.—First-stage filter.
4-31
