Tronair 02-7815C0110, Руководство по эксплуатации и обслуживанию, Страница: 9 / 69

Models: 02-7815C0110, 02A7815C0110, 02A7848C0120
10 Ton (9.07 Metric) Two Stage Jack with Air Pump
07/2021 | Rev. 06 Page | 6
6.0 TROUBLE SHOOTING
TROUBLE PROBABLE CAUSE ACTION
Fluid leakage at pump piston or
pump body Damaged backup ring, o-ring, piston or
pump body
Replace pump
External fluid leakage at rams
Damaged o-ring, backup ring or inner
cylinder wall
Remove rams as a unit from cylinder.
Inspect parts. Replace o-ring and
defective part(s)
Jack fails to lift rated load
Release valve not closed properly Fully tighten release valve
Low fluid level Fill to correct fluid level
Pressure relief valve improperly adjusted Adjust or replace release valve
Leakage at inlet or outlet check ball
Inspect valve body for wear or replace
valve body and check balls
Vent screw closed Open vent screw
Rams will not support load after
manual or pneumatic pump up
Leaking ram o-ring seals
Check for external leakage, if present
replace defective seal and back up ring
Leaking pressure check valve
Inspect valve body for wear or replace
valve body and check balls
Leaking pressure relief valve
Remove release valve, inspect ball and
ball seat in pump block. Replace
effective part(s)
Rams raise and fall with each
manual pump stroke
Release valve open Fully tighten release valve
Inlet check valve not seated or sticking
Pump rapidly to dislodge or replace valve
body
Pressure check valve not seated or sticking
Pump rapidly to dislodge or replace valve
body
Jack fails to lower
Ram locknut not loosened Raise jack ¼ inch and release locknut
Vent screw closed Open vent screw
O-Ring (pinched or rolled)
Replace o-ring and back-up ring, clean
up cylinder wall of debris