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2 MAINTENANCE
TROUBLE-SHOOTING CHART 2-15
PROBLEM
UNIT WILL NOT START
UNIT WILL NOT CONTINUE RUNNING
WHEN START BUTTON IS RELEASED
MOTOR RUNS BUT RAM DOES NOT MOVE
NORMALLY
UNIT WILL NOT REVERSE
CAUSE
( 1) No electrical power to unit
( 2) No electrical power to control
circuit
( 3) No electrical power to motor
( 1) Motor starter is in-operative
( 2) Motor starter auxiliary contacts are inop-
erative
( 3) Reverse Button is inoperative
( 4) Secondary contact on start button
is inoperative
( 1) Insufficient oil in reservoir
( 2) Low relief pressure
( 3) Oil leakage in cylinder
( 4) Defective pump
( 5) Oil leakage from hose fittings
( 6) Low voltage
( 7) Pump may be driven in the wrong
direction of rotation
( 8) Shaft broken, or shaft key sheared
( 9) Intake pipe from reservoir blocked, or oil
viscosity too heavy to prime
( 10) Intake air leaks (foam in oil or sounds
like gravel in pump)
( 11) Units shift slowly
( 12) Valve response sluggish
( 13) Loose hub coupling
( 1) Solenoid valve is in-operative
( 2) Reverse button in-operative
SOLUTION
( 1A) Turn on main disconnect
( 1B) Replace fuses or reset breakers
( 2A) Check primary and secondary
sides of transformer
( 2B) Check for correct voltage. Check
control fuses.
( 2C) Check stop button
( 2D) Check start button to be sure con-
tact closes when depressed
( 3A) Check heater resets
( 1A) Check motor starter coil & wiring
( 2A) Check motor starter contacts and
wiring
( 3A) Check reverse button to be sure
contacts are closed
( 3B) Check wiring
( 4A) Check contact, wired black and
orange, to be sure it is operating
properly
( 4B) Check wiring
( 1A) Fill reservoir with oil
( 2A) Check relief pressure (refer to
PROCEDURES-HYDRAULIC PRESSURE
CHECK and PRESSURE SETTINGS for
correct pressure.
( 2B) Clean orifice in relief valve and
reset pressure
( 2C) Check 'O" rings on relief valve for
damage or leakage
( 3A) Check cylinder for bypassing
( 3B) Replace seal kit, inspect rod and
cylinder tube for scoring or nicks
( 3C) Replace cylinder
( 4A) Replace pump
( 5A) Tighten hose fittings
( 6A) Check voltage
( 7A) Stop immediately to prevent seizure.
Check direction of drive rotation (prop-
er rotation direction is indicated by
arrow on motor)
( 8A) Visually inspect motor and pump shaft
and hub couplings for damage. Replace
if necessary.
( 9A) Drain system. Add clean fluid of proper
viscosity and specifications. Filter as
recommended. Check system filter for
cleanliness.
(10A) Check intake connections. Tighten
securely
( 11A) Flow control valve (restrictor) clogged ,
remove and clean orifice.
( 12A) Contaminated oil-drain and flush
system.
( 12B) Inadequate voltage, check voltage,
check coil
( 12C) Disassemble valve and clean
( 13A) Tighten set screws on hub coupling
halves
( 1A) Check coil in solenoid valve
( 2A) Check reverse button contacts