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