?1、泵芯磨損：泵芯與軸之間，泵殼與軸之間，活塞之間均有接觸；當柱塞泵工作時，由于內部溫度升高而產生沖擊作用；在摩擦作用下泵芯與軸之間的間隙逐漸變小當發生過壓保護故障時發動機可能不工作至規定的極限狀態；當過壓保護開關失靈時可能導致嚴重的安全事故。
2、密封失效：由于密封失效使泵進入氣缸的空氣減少，泵腔中的雜質和氣泡增多從而引起泵內氣體膨脹或爆炸3、機械磨損：由于柱塞泵過壓保護功能的失效（例如閥桿密封墊片和壓蓋密封件損壞）會導致泵的機械強度下降，進而導致機器的部件壽命降低。
4、泄漏增加；由于過壓保護功能失效會造成吸入空氣減少而使進氣不足 1、過壓保護作用： 柱塞泵在工作時，由于泵內的壓力變化導致壓力容器內壓力上升，此時如過壓保護開關失靈，會使空氣進入系統形成不平衡狀態，從而導致進排氣系統不平衡（俗稱“悶缸”）。
此時若對進排氣閥門進行保護，就可以防止進排氣閥門之間的壓力變化以及吸入系統中的氣體發生爆炸但是過壓保護開關具有一種“非接觸式”保護作用——當柱塞泵啟動時不能正常運轉，當系統達到額定壓力時又能正常運轉過壓保護功能就在這個時候發揮作用了。
2、對設備的影響 (1)影響正常運轉：當發生故障時，由于流量的突然變化，造成泵腔中氣體體積突然增加，導致活塞產生瞬間的壓力劇增此時缸體可能因壓力劇增而引起活塞產生局部過熱現象(2)縮短設備壽命：由于過壓保護故障時泵被壓蓋壓住，密封不嚴易造成泄漏、振動等問題。
(3)損壞零件：由于壓蓋密封墊片受損或漏氣引起泵排氣不足并發生高溫高壓的危害因此必須加強對過壓保護開關的維護管理和保養工作(4)縮短設備壽命：由于柱塞泵長期運轉會產生大量微小氣泡，使活塞承受高溫高壓而產生熱應力，活塞熱應力將造成液壓元件損壞和泵件泄漏。
90-L-180-HF-5-BC-80-S-M-C8-H-03-NNN-32-14-30 90L180HF5BC80SMC8H03NNN321430 90L180-HF-5-BC-80-S-M-C8-J-03-NNN-32-32-24 90L180HF5BC80SMC8J03NNN323224 90-L-180-HF-5-BC-80-S-M-C8-J-03-NNN-32-32-24 90L180HF5BC80SMC8J03NNN323224 90L180-HF-5-BC-80-T-C-C8-H-03-NNN-32-32-24 90L180HF5BC80TCC8H03NNN323224 90-L-180-HF-5-BC-80-T-C-C8-H-03-NNN-32-32-24 90L180HF5BC80TCC8H03NNN323224 90L180-HF-5-BC-80-T-C-C8-J-03-NNN-32-32-24 90L180HF5BC80TCC8J03NNN323224 90-L-180-HF-5-BC-80-T-C-C8-J-03-NNN-32-32-24 90L180HF5BC80TCC8J03NNN323224 90L180-HF-5-BC-80-T-M-F1-H-03-FAC-23-23-24 90L180HF5BC80TMF1H03FAC232324 90-L-180-HF-5-BC-80-T-M-F1-H-03-FAC-23-23-24 90L180HF5BC80TMF1H03FAC232324 90L180-HF-5-CD-80-S-C-C8-H-03-NNN-30-30-28 90L180HF5CD80SCC8H03NNN303028 90-L-180-HF-5-CD-80-S-C-C8-H-03-NNN-30-30-28 90L180HF5CD80SCC8H03NNN303028 90L180-HF-5-CD-80-S-C-C8-H-03-NNN-35-35-28 90L180HF5CD80SCC8H03NNN353528 90-L-180-HF-5-CD-80-S-C-C8-H-03-NNN-35-35-28 90L180HF5CD80SCC8H03NNN353528 90L180-HF-5-CD-80-S-C-C8-J-03-NNN-35-35-28 90L180HF5CD80SCC8J03NNN353528 90-L-180-HF-5-CD-80-S-C-C8-J-03-NNN-35-35-28 90L180HF5CD80SCC8J03NNN353528 90L180-HF-5-CD-80-S-M-F1-H-03-FAC-14-14-22 90L180HF5CD80SMF1H03FAC141422 90-L-180-HF-5-CD-80-S-M-F1-H-03-FAC-14-14-22 90L180HF5CD80SMF1H03FAC141422 90L180-HF-5-CD-80-T-C-C8-J-03-NNN-35-35-28 90L180HF5CD80TCC8J03NNN353528 90-L-180-HF-5-CD-80-T-C-C8-J-03-NNN-35-35-28 90L180HF5CD80TCC8J03NNN353528 90L180-HF-5-CD-80-T-C-F1-H-03-FAC-35-35-24 90L180HF5CD80TCF1H03FAC353524 90-L-180-HF-5-CD-80-T-C-F1-H-03-FAC-35-35-24 90L180HF5CD80TCF1H03FAC353524 90L180-HF-5-CD-80-T-C-F1-J-03-EBA-42-42-24 90L180HF5CD80TCF1J03EBA424224 90-L-180-HF-5-CD-80-T-C-F1-J-03-EBA-42-42-24 90L180HF5CD80TCF1J03EBA424224 90L180-HF-5-CD-80-T-M-C8-J-03-NNN-38-38-28 90L180HF5CD80TMC8J03NNN383828 90-L-180-HF-5-CD-80-T-M-C8-J-03-NNN-38-38-28 90L180HF5CD80TMC8J03NNN383828 90L180-HF-5-CD-80-T-M-C8-J-03-NNN-42-42-28 90L180HF5CD80TMC8J03NNN424228 90-L-180-HF-5-CD-80-T-M-C8-J-03-NNN-42-42-28 90L180HF5CD80TMC8J03NNN424228 90L180-HF-5-CD-80-T-M-F1-H-03-FAC-35-35-24 90L180HF5CD80TMF1H03FAC353524 90-L-180-HF-5-CD-80-T-M-F1-H-03-FAC-35-35-24 90L180HF5CD80TMF1H03FAC353524 90L180-HF-5-DE-80-S-C-C8-J-03-NNN-32-32-28 90L180HF5DE80SCC8J03NNN323228 90-L-180-HF-5-DE-80-S-C-C8-J-03-NNN-32-32-28 90L180HF5DE80SCC8J03NNN323228 90L180-HF-5-DE-80-S-C-F1-J-03-NNN-32-32-28 90L180HF5DE80SCF1J03NNN323228 90-L-180-HF-5-DE-80-S-C-F1-J-03-NNN-32-32-28 90L180HF5DE80SCF1J03NNN323228 90L180-HF-5-DE-80-T-C-C8-J-03-NNN-35-35-24 90L180HF5DE80TCC8J03NNN353524 90-L-180-HF-5-DE-80-T-C-C8-J-03-NNN-35-35-24 90L180HF5DE80TCC8J03NNN353524 90L180-HF-5-DE-80-T-C-F1-J-03-FAC-23-23-28 90L180HF5DE80TCF1J03FAC232328 90-L-180-HF-5-DE-80-T-C-F1-J-03-FAC-23-23-28 90L180HF5DE80TCF1J03FAC232328 90L180-HF-5-EF-80-T-M-F1-H-03-EBA-38-38-24 90L180HF5EF80TMF1H03EBA383824 90-L-180-HF-5-EF-80-T-M-F1-H-03-EBA-38-38-24 90L180HF5EF80TMF1H03EBA383824 90L180-HF-5-EG-80-S-C-C8-H-03-NNN-35-35-28 90L180HF5EG80SCC8H03NNN353528 90-L-180-HF-5-EG-80-S-C-C8-H-03-NNN-35-35-28 90L180HF5EG80SCC8H03NNN353528 90L180-HF-5-NN-80-S-C-C8-J-03-NNN-38-38-24 90L180HF5NN80SCC8J03NNN383824 90-L-180-HF-5-NN-80-S-C-C8-J-03-NNN-38-38-24 90L180HF5NN80SCC8J03NNN383824 90L180-HF-5-NN-80-S-C-C8-J-05-NNN-42-42-30 90L180HF5NN80SCC8J05NNN424230 90-L-180-HF-5-NN-80-S-C-C8-J-05-NNN-42-42-30 90L180HF5NN80SCC8J05NNN424230 90L180-HF-5-NN-80-S-C-F1-H-04-NNN-40-40-24 90L180HF5NN80SCF1H04NNN404024 90-L-180-HF-5-NN-80-S-C-F1-H-04-NNN-40-40-24 90L180HF5NN80SCF1H04NNN404024 90L180-HF-5-NN-80-S-C-F1-J-03-NNN-42-42-24 90L180HF5NN80SCF1J03NNN424224 90-L-180-HF-5-NN-80-S-C-F1-J-03-NNN-42-42-24 90L180HF5NN80SCF1J03NNN424224 90L180-HF-5-NN-80-S-M-F1-H-03-FAC-32-14-30 90L180HF5NN80SMF1H03FAC321430 90-L-180-HF-5-NN-80-S-M-F1-H-03-FAC-32-14-30 90L180HF5NN80SMF1H03FAC321430 90L180-HF-5-NN-80-T-C-F1-J-03-FAC-35-35-24 90L180HF5NN80TCF1J03FAC353524 90-L-180-HF-5-NN-80-T-C-F1-J-03-FAC-35-35-24 90L180HF5NN80TCF1J03FAC353524 90L180-HF-5-NN-80-T-C-F1-J-03-NNN-38-38-24 90L180HF5NN80TCF1J03NNN383824 90-L-180-HF-5-NN-80-T-C-F1-J-03-NNN-38-38-24 90L180HF5NN80TCF1J03NNN383824 90L180-HF-5-NN-80-T-C-F1-J-03-NNN-42-42-24 90L180HF5NN80TCF1J03NNN424224 90-L-180-HF-5-NN-80-T-C-F1-J-03-NNN-42-42-24 90L180HF5NN80TCF1J03NNN424224。
