35
2 MAINTENANCE
TROUBLESHOOTING CHART
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
inoperative
( 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
( 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 contact
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
(proper 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
(12C)Dissamble valve and clean
(1A) Check coil in solenoid valve
(2B) Check reverse button contacts
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