Ashcroft 1327D Manuale di installazione e manutenzione - Pagina 16
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5.4 Troubleshooting Chart
Symptom
Pressure does
not build up when
pumping handle.
High pressure
does not increase
when pumping
handle while
shuttle valve is
pushed in.
Pressure builds up
when pumping
handle, but
decreases when
pumping is
stopped.
1.800.561.8187
Corrective
Case
Action
Insufficient fluid
Add fluid.
level in reservoir.
Piston O-rings
worn or ruptured.
Inspect O-rings
and replace as
necessary. If
O-rings are new,
verify their fluid
compatibility.
Bleed port check
Inspect O-rings
valve or shuttle
and replace as
check valve
necessary.
inoperative.
Fill tube assembly
Remove and clean
and filter plugged.
fill tube assembly.
Refill reservoir
with clean fluid.
Shuttle valve
Pull shuttle valve
pushed in for
outward from
small fluid dis-
body.
placement when
large fluid dis-
placement is
required.
Air trapped in
Reprime pump.
pump piston.
Operate pump
Rapid pump han-
handle with
dle strokes which
smooth moderate
lessen fluid flow
action.
through the pump
piston.
Leakage at outlet
Inspect connec-
or gauge connec-
tions and tighten
tions(s).
as necessary.
High pressure
Inspect O-ring and
check valve O-ring
replace as neces-
worn or ruptured.
sary.
Defective pressure
Hand tighten
release valve.
release valve.
Inspect release
valve seating sur-
faces. Replace as
necessary.
Remove release
valve seat and
inspect O-ring
underneath.
Replace as
necessary.
www.
Symptom
Case
Pump handle rises
High pressure
after pumping.
check valve O-ring
worn or ruptured.
Piston plate (with
Worn piston and
deadweights)
cylinder assembly.
drops rapidly.*
Unable to hold
constant pressure.
Stacked dead-
Damaged dead-
weights wobble
weights.
when spinning pis-
ton plate.*
Piston plate
Too heavy an oil
assembly will not
grade being used.
spin.*
*These symptoms apply only to the 1305D Deadweight Testers.
.com
Corrective
Action
Inspect O-ring
and replace as
necessary.
Use a heavy oil
temporarily.
Replace piston &
cylinder.
Check dead-
weights for visible
damage (bends,
dents, nicks, etc.)
and alignment.
Flush & fill unit
with proper grade
of oil (SAE 20 or
SAE 10).
Replace piston &
cylinder assembly.
Disassemble and
flush complete test
unit with kerosene
or alcohol.
Reassemble unit.