EXCESSIVE PUMP NOISE:

Check pump rotation. Direction of rotation must correspond with arrow on the pump case.

Check fluid level. Surface fluid should be well above the end of the suction line during all of the work cycle.

Check fluid types. Make sure fluid is a good clean hydraulic fluid with a minimum required viscosity at operating temperature. (check pump manufacture for specifications)

Check coupling alignment. Pump and motor should be aligned within .003 T.I.R.

Check for air leaks in suction line and case line. Locate by pouring oil or grease around suspect areas while listening for change in the sound of operation. Tighten or repair as required

Check for restricted flow in the suction piping. Make sure all piping and fittings are full size throughout. Make sure suction line is not plugged. Avoid excessively long suction lines and elbows.

Check for restrictions at filter or strainer. Calculate required size and double to allow for partial blocking by contaminates.

Check for sticking vanes. Remove pump cover and check rotor and vanes for presence of chips, sticky oil or varnish deposits.

Check pump speed. Speeds above maximum rating are harmful and cause premature failure.

Check for air or air bubbles in intake line. Make sure reservoir has baffles and return lines terminate below fluid level on the opposite side of the baffle from the intake lines.

SYSTEM EXCESSIVELY HOT:

Check operating pressure. Reduce pressure to minimum required for installation.

Check to see if the pump is discharging through relief valve. Remove relief valve. Relief valves are not required with Continental vane pumps and they create additional heat. When using other pumps, relief valves must be used but set relief pressure 15% above pump pressure.

Check to see if pump is unloading during idle periods of machine operating cycle. Use an open center valve or dual pressure governor when applicable on machine cycle.

Check cooling system. Install cooler or increase reservoir capacity.

Check for excessive pump slippage. Tighten bolts on the pump cover.

Check case drain return location. Make sure the drain and suction lines are separated by a baffle in reservoir or that drain is located at a distance practical before fluid re-enters pump.

Check progressively through the system components. Feel components to locate excessively hot ones and repair or replace them.

Check for high ambient or radiant temperatures. Relocate power unit, baffle against heat, or use fan directed against reservoir to increase air flow across the reservoir.

LEAKAGE AT SHAFT SEALS:

Check for abrasives on pump shaft. Protect shaft from abrasive dust and foreign materials

Check for damage at installation. Possible scratched or damaged seals. Replace seals, avoiding cuts when passing seals over key ways.

Check coupling alignment. Pump and motor should be aligned within .003 T.I.R.

Check for pressure in pump case. Inspect case drain for restrictions. Pipe should be full size direct to reservoir. Pressure should not exceed 10 psi.

Check for fluid incompatibility. Fire resistant fluid may require special seals – convert seals

BEARING FAILURE:

Check for chips or other foreign materials. Make sure clean fluid is used

Check coupling alignment. Pump and motor should be aligned within .003 T.I.R.

Check for excessive shock loads. Observe maximum rating of operating pressure, reduce operating pressure.

Check for overhung loads. Overhung loads are not recommended. Continental pumps are not designed to handle overhung loads. Make provisions for outboard bearings to alleviate condition.

Check for high operating pressure. Reduce maximum pressure at no flow.

Check for incorrect fluids. See data pages for proper fluid codes.

Check for possible improper start-up. See proper pump start-up instructions.

PUMP NOT DELIVERING FLUID:

Check pump rotation. Direction of rotation must correspond with arrow on the pump case.

Check fluid level. Surface fluid should be well above the end of the suction line during all of work cycle.

Check minimum pump speed recommendations. to be sure of proper priming characteristics.

Check for improper pressure adjustment. Turn in pressure adjustment screw two or three turns after spring tension is felt.

Check for air leaks in suction line. Tighten joints and eliminate any possible place for air to enter system.

Check fluid viscosity. May be to heavy for proper priming. Check recommendations on pump data page.

Check maximum volume control. Turn volume control counterclockwise to increase delivery.

Check for a bleed off in another portion of the circuit. Look for open center valves or other controls connected directly to tank.

Check for plugged suction lines. A periodic check should be made as a preventive maintenance procedure.

Check for excessive pump slippage. Tighten bolts on the pump cover.

Check for broken pump shaft or rotor. Check for signs of excessive shock, dirt, foreign material or other cause of failure.

Check for sheared key at the coupling. Replace when required.

LACK OF VOLUME:

Check maximum volume control. It may be screwed in too far; back out the maximum volume control.

Check for dirt or chips under the vanes holding the pressure ring on center. Dismantle pump, inspect, and clean up dirt and chips.

PUMP NOT DEVELOPING PRESSURE:

Check if pump is delivering fluid. See section "pump not delivering fluid.

Check pressure adjustment screw setting. Adjust pressure screw to obtain desired operating pressure at deadhead.

Check to see if pressure is being relieved through a bypass valve. Remove relief valve, or set cracking pressure at least 200 psi above pump pressure valve.

Check to see if fluid is bypassing to reservoir. Test the circuit pressure, progressively watching for open center valves and/or other valves open to reservoir.

Check to se if pressure gauge line is shut off. Check to se if gauge snubber is open. Install a pressure gauge known to be accurate in a line open to direct pump pressure.

Check to see if system requires more fluid than pump capacity. Check the pressure at deadhead.

Check for malfunctioning or broken gauge. Install a new gauge

OVERLOADING MOTOR:

Check to see if motor is properly sized for pressure and volume requirements. Review engineering data pages for proper horsepower recommendations.

Check to see if there is excessive internal slippage in the pump. Tighten the cover bolts on the pump

Check to see if pump is being started with full pressure and volume. Use a higher starting torque motor or start pump with vale closed so no fluid will flow.

Check to see if motor overload protection is undersized. Install a larger capacity unit with a larger heater.

Check for low voltage. Check the voltage input and/or increase to larger wire leads.

Check the motor wiring for the wrong voltage. Check motor leads for proper voltage connections.

Check for internal pump seizure. Repair or replace pump.