Vertical Express I-2 Manual page 40

Reference Material
Troubleshooting Flowcharts
(continued)
Yes
Replace lowering
piston.
Verify proper
performance.
38
A
Install pressure gauge
at bleed plug at jack.
Record pressure as
empty car runs up and
down past a given
point.
Is difference in
pressure more than Yes
25 PSI?
No
Remove and examine
lowering piston.
Is distance from seat
to bottom of slots
more than 1/8"?
No
Replace valve.
Adjust job.
Flowchart 16
Run car from bottom to
top. Record pressure
every 3' 0" as car runs
up.
Did pressure
increase and then
Yes
drop back at any one
spot?
Run car down. Record
pressure every 3" 0" as
car runs down.
Did pressure
No decrease and then
climb at any one
spot?
No
A
Flowchart 17
I-2 / I-3 Valve
Yes
Jack is probably dog-
legged at that point.
B
Flowchart 17
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