ATN PIAF 10E 2018, Инструкция по безопасности и техническому обслуживанию

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SAFETY AND MAINTENANCE MANUAL
1NO0055UK-00
PIAF 10 E
61
EXCESSIVE HEAT
Excessive heat usually results from a relief valve set too low. If a relief valve is set too low, part of
the oil will be dumped by the relief valve at each cycle. In this case, the machine will be very slow.
OIL PRESSURE TOO HIGH
There are two possible reasons:
(a) the relief valve does not function, producing an extreme surge and immediate failure, or
(b) the relief valve is set too high, resulting in repeated pressure peaks. Damage to the pump is
very similar in both cases.
Pinching of the O ring will occur if not properly placed in its groove. If the O ring has been
incorrectly mounted, the housing surface will show a depressed area.
TROUBLESHOOTING
IF A PUMP IS NOISY (CAVITATION):
- Oil level too low
- Air gets into the system through the shaft seal
- Oil too heavy
- Air leak
- Restriction in the suction line
- Worn pump.
- NOTE -
Use a pressure gauge to isolate the problem.
Solutions:
◘ If the oil level is too low, fill to the correct level (mast cylinder retracted)
◘ If air gets into the system through the shaft seal, replace the seal.
◘ If the oil is too heavy, replace it with oil of correct viscosity. Refer to the “Lubrication”
section.
◘ If restriction in the suction line, replace the hose.
◘ If air in the system, bleed the air, check the level and check the suction line is tight.
◘ If parts are worn or broken, replace the pump.
IF THE PUMP IS TOO SLOW TO RESPOND OR FAILS TO RESPOND:
- Oil level too low
- Relief valve set too low
- Or pump used or damaged.
Solutions:
◘ Insufficient pressure, use a pressure gauge to adjust the pressure.
◘ If pump worn or damaged, replace the pump.