Columbus JACK/Regent
2222 S. Third St., Columbus, Ohio 43207-2402 USA
MODEL 179D1100-56
50 TON ALLIGATOR AXLE JACK
PAGE -4-
TROUBLE SHOOTING CHART
TROUBLE PROBABLE
CAUSE REMEDY
Rams fail to lift when
operated, or jacks fails to lift
rated load.
Incorrect setting of relief valve.
Adjust set screw clockwise to
increase system relief
pressure.
Low fluid level
Fill to correct fluid level.
Defective outlet check valves.
Remove pump assemblies.
Remove and inspect spring
and steel ball and replace if
necessary.
Worn plunger “O” ring or back-
up ring.
Remove cotter pin, pins and
fulcrum. Remove an inspect
“O” rings and back-up rings
and replace if necessary.
Defective inlet check valve.
Remove pump assembly.
Remove cotter pin, pins,
fulcrum, plug and cotter pin.
Turn pump base upside-down
and remove steel ball. Inspect
cotter pin and steel ball and
replace if necessary.
Valve body partially open.
Using slotted pump handle,
adjust valve body clockwise
until tight.
Pumps inoperative or difficult
to operate.
Vacuum created in reservoir
due to clogged muffler.
Clean muffler.
Obstructed pump passage.
Remove pump assemblies.
Completely disassemble
pumps and blow compressed
air into passages to free
obstruction.
Pistons will not lower.
Obstructed pump passage.
Remove pump assemblies.
Completely disassemble
pumps and blow compressed
air into passages to free
obstruction.
Rams will not fully elevate.
Low fluid level.
Inspect and fill to correct level.
Defective ram “O” rings or
back-up rings.
Remove first, second and third
stage rams. Remove and
inspect O-rings and backup
rings and replace if necessary.
Valve body partially open.
Using slotted pump handle,
adjust valve body clockwise
until tight.
