TROUBLE

CAUSE

REMEDY

Lift won’t raise at all

1. Low oil control stuck

2. Air pressure not getting to lift

3.  Worn or broken control valve component

1. Remove, replace low oil control or add oil

2. Check compressor, valves and/or filter

3. Replace valve and/or parts

Lift raises slow or won’t raise load

1. Insufficient air pressure

2. Compressor tank too small

3. Compressor tank full of water

4. Restriction or pipe line too small

5. Oil too heavy in viscosity

6. Air valve not working properly. (Plugged screen or worn rocker)

7. Load greater than lift capacity

8. Air supply line from compressor to lift too small

1. Check air compressor

2. Check specifications

3. Drain tank

4. Check pipe and size

5. Check and/or change oil

6. Clean screen or replace valve

7. Weigh vehicle, check specification

8. Replace piping with correct size

Lift raises slowly with air valve closed (Semi hydraulic)

1. Leak in air valve

1. Check intake port, repair or replace

Lift creeps down with air valve closed (Semi hydraulic)

1. Leak in air valve

2. Air leak in fill plug

3. Air leak in line from valve to cylinder.  Air leak in outer casing.

4. Leak at manual air bleed screw.

1. Check intake port, repair or replace

2. Apply soapy water and watch for bubbles after letting air into system.  Tighten.

3. Check thoroughly first to be sure, then repair or replace

4. Tighten or replace

Lift “jumping” or “dropping”

1. Low on oil

2. Air  pockets in system

3. Low oil control not seated

1. Locate and repair source of oil loss.  Add oil (click here to see cup test)

2. Add oil and bleed air from system

3. Remove and check float

Oil blows out exhaust muffler

1. Low on oil

2. Too much oil (Plus water in oil from air line)

3. Improper grade of oil. (Foaming)

4. Leak in interior air line (semi Hydraulic)

5. Baffle tube in tank out of position

6. Lift not raised to full rise often enough to allow automatic bleeder to operate. (semi-Hydraulic)

7. Check disk on bottom of plunger broken apart

1. Locate and repair source of oil loss.  Add oil

2. Check level, siphon excess (install water trap near control valve)

3. Change oil

4. Replace lift

5. Center and reseat tube

6. Daily raise the lift to full rise or manually bleed the lift

7. Install replacement check disk

Lift raises vehicle but stops short of full rise

1. Low oil control float shuts off due to low oil condition

1. Locate and repair source of oil loss.  Add oil.

Lift “chatters” going up or down.

1. Check position of wheel chocks, off center loading

2. Vehicle position incorrectly over lift

3. Bind at non-rotator, or safety leg

5. Jacks out of plumb

6 Water contaminated or old oil in jack

7. No ballast in plunger (full hydraulic only)

8. Vehicle weight exceeds capacity of lift

9. Main air line, incorrect size, and/or too many elbows

10 Oil line too small

11. Improper operation, oil valve  blocked open, using air valve to raise lift.

12. Air trapped in lift

1. Wheel spotter incorrectly installed, install correctly (Click here to see diagram)

2. Spot vehicle correctly

3. Check alignment, and condition. Disconnect, raise and lower lift observing condition

5. Re-plumb lift

6. Replace oil

7. Add ballast to plunger

8. Check weight of

     vehicle

9. Correct main line

10. Oil lines should be 1 1/4” min.

11. Follow operation instructions from owners packet.

12. Bleed lift

Scratches on plunger

1. Foreign matter in packing

1. Remove, replace packing, clean and polish plunger

Oil leaking at seal

1. Seal lip cut or damaged

2. Manual bleeder plug loose

3. Packing gland bolts loose

4. Gland bolts bottoming out on concrete or debris

5. Wrong gland bolts.  If bolts are too long gland will not tighten

6. Cracked gland

7. Scored plunger

8. Small pin hole in plunger

1. Replace seal (our seal kits come with instructions)

2. Tighten or replace bleeder plug

3. Torque bolts to 50 lbs.

4. Remove bolts and clean holes

5. Correct specification of gland bolts

6. Replace gland

7. Sand scores with emery cloth or replace plungers

8. Replace plunger.

Lift will not lower after weight is off of lift

1. No ballast in plunger

2. Debris in outer pipe–safety leg

3. Inner pipe bent-safety leg

4. Inner pipe binding with superstructure or outer pipe

1. Add ballast to plunger

2. Clean out outer pipe

3. Replace safety leg

4. Adjust alignment of inner pipe