Ashcroft 1305DM-100 Handbuch für Installation und Wartung - Seite 16
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Seite drucken5.4 Troubleshooting Chart
Symptom
Case
Pressure does
Insufficient fluid
not build up when
level in reservoir.
pumping handle.
Piston O-rings
worn or ruptured.
Bleed port check
valve or shut-
tle check valve
inoperative.
Fill tube assembly
and filter plugged.
Shuttle valve
pushed in for small
fluid displacement
when large fluid
displacement is
required.
High pressure
Air trapped in
does not increase
pump piston.
when pumping
Rapid pump han-
handle while
dle strokes which
shuttle valve is
lessen fluid flow
pushed in.
through the pump
piston.
Pressure builds
Leakage at outlet
up when pump-
or gauge connec-
ing handle, but
tions(s).
decreases when
High pressure
pumping is
check valve O-ring
stopped.
worn or ruptured.
Defective pressure
release valve.
Corrective
Action
Symptom
Add fluid.
Pump handle rises
after pumping.
Piston plate (with
deadweights)
Inspect O-rings
drops rapidly.*
and replace as
Unable to hold
necessary. If
constant pressure.
O-rings are new,
verify their fluid
Stacked dead-
compatibility.
weights wobble
when spinning
Inspect O-rings
piston plate.*
and replace as
necessary.
Piston plate as-
Remove and clean
sembly will not
fill tube assembly.
spin.*
Refill reservoir
with clean fluid.
Pull shuttle valve
outward from
body.
*These symptoms apply only to the 1305D Deadweight Testers.
Reprime pump.
Operate pump
handle with
smooth moderate
action.
Inspect connec-
tions and tighten
as necessary.
Inspect O-ring and
replace as neces-
sary.
Hand tighten re-
lease valve.
Inspect release
valve seating sur-
faces. Replace as
necessary.
Remove release
valve seat and
inspect O-ring un-
derneath. Replace
as necessary.
16
of 20
Corrective
Case
Action
High pressure
Inspect O-ring
check valve O-ring
and replace as
worn or ruptured.
necessary.
Worn piston and
Use a heavy
cylinder assembly.
oil temporarily.
Replace piston &
cylinder.
Damaged dead-
Check dead-
weights.
weights for visible
damage (bends,
dents, nicks, etc.)
and alignment.
Too heavy an oil
Flush & fill unit
grade being used.
with proper grade
of oil (SAE 20 or
SAE 10).
Replace piston &
cylinder assembly.
Disassemble and
flush complete
test unit with ker-
osene or alcohol.
Reassemble unit.