5
USER MANUAL
TUNJKTRLY02
6. TROUBLESHOOTING
Symptom
Possible Causes
Solution
Jack will not lift the load
1. Overloaded
2. Low oil level
3. Release valve not correctly closed
4. Air in system
5. Piston rod not functioning
6. Packing worn or defective
1. Be sure to use jack with adequate capacity
2. Top up oil lever
3. Check and close release valve
4. Open release valve and pump the handle a few times.
Close valve and re-try
5. Clean and replace oil
6. Replace packing
Jack does not lift high
enough or feels 'spongy'
1. Oil level too high or too low
2. Worn seals
3. Air in system
4. Release valve not closed
1. Fill or remove excess oil
2. Return jack to local service agent
3. Open release valve and pump the handle a few times.
Close valve and re-try
4. Check and close release valve
Jack lifts poorly
1. Pump packing or valves
malfunctioning
2. Oil is dirty
3. Air in the system
1. Replace packing and / or clean valves
2. Replace oil
3. Open release valve and pump the handle a few times.
Close valve and re-try
Jack lifts but will not
hold load
1. Release valve partially open
2. Dirt on valve seats
3. Air in system
4. Faulty seals
5. Packing worn or defective
1. Check and close release valve.
2. Lower jack, close release valve. Place foot on front
wheel and pull up lifting arm to full height by hand.
Open the release valve to lower arm
3. Open release valve and pump the handle a few times.
Close valve and re-try
4. Replace or contact local service agent
5. Replace packing
Jack will not lower
completely
1. Unit requires lubrication
2. Piston rod bent or damaged
3. Jack frame / link system distorted
due to overloading / poor positioning
4. Air in system
5. Release valve partially closed
6. Jack spring damaged
1. Oil all external moving parts
2. Replace rod or contact local service agent
3. Replace damaged parts or contact local service
agent
4. Open release valve and pump the handle a few times.
Close valve and re-try
5. Check and fully open release valve.
6. Replace spring or contact local service agent
Jack does not lower at all
1. Release valve closed
1. Check and fully open release valve
