0613
ESCO EQUIPMENT SUPPLY COMPANY
15270 Flight Path Drive, Brooksville, USA Florida 34604 ● Phone (800)352-9852, (352)754-1117; Fax (352)754-4508
E-mail: [email protected]
Web Site:
5
Problem
Cause
Solution
Cylinder will not extend
or fully extend
1.Pump release valve open
2.Couplers not fully tightened
3.Oil level in pump reservoir is
low
4.Pump or valve malfunctioning
5.Overload for cylinder
6.Cylinder piston rod binding
1. Fully tighten pump release
valve
2. Fully tighten couplers
3. Fill oil in pump
4. Repair or use another pump
and valve
5. Change another cylinder with
appropriate capacity
6. Check for dirt or leaks,
change the damage parts
Cylinder can not
maintain pressure
1. Leaky connection
2. Cylinder seals leaking
3. Release valve not fully closed
4. Pump or valve malfunctioning
1. Clean and reseal thread,
tighten connection
2. Replace worn seals. Clean
inside cylinder and use clean
hydraulic oil
3. Fully tightening the release
valve
4. Repair, or use another pump
and valve
Cylinder extends
slower than normal
1. Leaky connection
2. Coupler not fully tightened
3. Pump malfunctioning
1.Clean and reseal thread,
tighten connection
2. Fully tighten couplers
3. Repair or use another pump
and valve
Cylinder extend in dithering
1. Air in system
2. Cylinder piston rod binding
1. Bleeding air in the system
3. Check for dirt or leaks. Check
for bent, misaligned and worn
parts
Cylinder leaks hydraulic oil
1. Leaky connection
2. Worn or damaged seals
3. Cylinder damage
1.Clean and reseal thread,
tighten
connection
2.Replace worn seals, clean
inside cylinder
and use clean hydraulic oil
3. Use new cylinder of contact
with your nearest Authorized
ESCO Hydraulic Service Center.
Cylinder will not retract or
Retracts slower than normal
1. Pump release valve closed
2. Couplers are not fully
tightened
3. Pump reservoir is full
4. Hose is blocked
5.ESCO cylinders are load
return
6. Cylinder damaged
1. Open release valve
2.Tightening the couplers
3. Drain hydraulic oil to correct
level
4. Clean or change hose
5. Retract cylinder by load
6. Use new cylinder or contact
your nearest Authorized ESCO
Hydraulic Service Center
ESCO Cylinders should be repaired only by a qualified operator or
Authorized ESCO Service Centers. Use only ESCO or other
approved hydraulic oil. Release pressure in hydraulic system and
disconnect hose(s) before making repair
.
