MAINTENANCE
1. Please always use clean oil or other approved hydraulic oil with cylinders. Use other unapproved
oil or dirty oil will damage the cylinders.
2. Always keep cylinder clean, use thread proctor and dust cap to protect collar thread and
couplers.
3. After finish work, Cylinder must be fully retracted, cleaned and stored in ventilation, moist-proof,
corrosion-proof place.
TROUBLE-SHOOTING
WARNING: Cylinders should be repaired only by a qualified operator. Repair cylinders without special
tools and knowledge may result in personal injury. Please release pressure and disconnect hose(s)
before making repair.
Problem
1. Release valve open
Cylinder
2. Couplers not fully tightened
will not
3. Oil level in pump reservoir is low
extend or
4. Pump or valve malfunctioning
fully
5. Overload for cylinder
extend
6. Cylinder piston rod binding
Cylinder
1. Leaky connection
can not
2. Cylinder seals damage
maintain
3. Release valve not fully closed
pressure
4. Pump or valve malfunctioning
Cylinder
extends
1. Leaky connection
slower
2. Coupler not fully tightened
than
3. Pump malfunctioning
normal
Cylinder
1. Air in cylinder
extend in
2. Cylinder piston rod binding
dithering
Cylinder
1. Leaky connection
leaks
2. Worn or damaged seals
hydraulic
3. Cylinder damage
oil
Cylinder
1. Pump release valve closed
will not
2. Couplers are not fully tightened
retract or
3. Pump reservoir is full
Retracts
4. Hose is blocked
slower
5. Return spring is damaged
than
6. Cylinder damaged
normal
BGS technic KG
Bandwirkerstr. 3
D-42929 Wermelskirchen
Cause
Tel.: 02196 720480
Fax.: 02196 7204820
Solution
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
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
1. Clean and reseal thread, tighten connection
2. Fully tighten couplers
3. Repair or use another pump and valve
1. Bleed air (see chapter 2.2)
2. Check for dirt or leaks, Check for bent,
misaligned and worn parts
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 Hydraulic Service Center for repairing
1. Open release valve
2. Tightening the couplers
3. Drain hydraulic oil to correct level
4. Clean or change hose
5. Change return spring
6. Use new cylinder or contact your nearest
Authorized Hydraulic Service Center for repairing
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