确切地 说，挖掘机CN201000417CN201000417，当泵的情况日趋恶化，在系统中早巳隐藏着使泵损坏的各种因 素，实践证明90％至95％的泵的异常损坏，可大略地归纳为下列几 种： 1. 空气混入 2. 气蚀 3. 使用液体污染 4. 过热 5. 超压 6. 使用不适当的工作液体 因此，合理的维护、保养和使用液压系统就显得尤为重要了。

3132525251 MATCHED SET WM51 2.5 *Y - (FH) PGP300 CAST IRON GEAR UNITS PRODUCT INFO 3139112203 P50A278BEOM17-7 - (FH) PGP300 CAST IRON GEAR UNITS PRODUCT INFO 3139112214 P50A278BEON25-7 H5883 - (FH) PGP300 CAST IRON GEAR UNITS PRODUCT INFO 3139115126 P50A242BEJR25-11 - (FH) PGP300 CAST IRON GEAR UNITS PRODUCT INFO 电磁铁的换向频率过快，热量的堆积比失散怏，电磁铁很快变得力量不够不能* 闭合而存在气隙磁阻。

当换向频率过快时，连续高频启动产生的电流会将电磁铁烧坏。

交流 电磁铁的换向频率原标准规定为1000次／时，现提高到2000次／时，这对一般用途的电磁铁 足以满足使用要求。

3249110146 PGP330A296***AB15-65* - (FH) PGP300 CAST IRON GEAR UNITS PRODUCT INFO 3249110147 P330A296***AB17-65* - (FH) PGP300 CAST IRON GEAR UNITS PRODUCT INFO 3249110229 D330 PA01-161 H6127 ** - (FH) PGP300 CAST IRON GEAR UNITS PRODUCT INFO 3249110263 PGP330A296***AB*17-65* - (FH) PGP300 CAST IRON GEAR UNITS PRODUCT INFO 三联阀A35-AA4-MB53*3-Y12    四联阀A35-AA4-MB53-MA53*3-Y12 五联阀VA35-AA440-DB4-MA4X2-DA4X2-Y55055 六联阀A20-AA128-DA53DA53DA53DA53-HB166-HA166-Z16 四机250修井机三联阀A35-AA4-MB53-MA53-XDR53-Z16 四机250修井机六A20-A128-A53-DA53-DA53-DA53-HB166-HA166-Z16 阀片(进)A35-AA4阀片A35-MB53 阀片A35-MA53阀片（出）A35-Y12阀片 主油泵(原厂件） P50A/P25/IP407/3139115017 油泵(OE件） P50A/P25/IP407/3139115017 主油泵 P37X28BASD30-7/P75 取力器 852XGAKP-F6XS/IT454 取力器 852XBAKP-B4XS 取力器 880XDAKXM6XK 取力器 880XDAKXM6XS 取力器 880XDAKPM4XS 阀片 VA20-AA440/A20-AA128 阀片 VA20-HA333/A20-HA166 阀片 VA20-HB333/A20-HB166 阀片 VA20-DA3/A20-DA53 阀片 VA20-Z440/A20-Z16 阀片 VA35-AA440/A35-AA 阀片 VA35-MA4/A35-MA53 阀片 VA35-MB4/A35-MB53 阀片 VG35-RA899/A35-XDR53 阀片 VA35-Z550/A35-Z16 阀片 A35-Y12/A35-Y55055/A35-Y50050/Y6 阀片 VA20-HB330-2 阀片 VA20-HA322 阀片 VA20-Y44044/VA20-PB44 阀片 VA35-DB4 阀片 VA35-CA440 阀片 VA35-Y35035 阀片 A35-DA53/DAV35-DA4  阀片 DVA35-DA8 阀片 VA20-DB3 阀片 VA20-MA3   阀片A35-XDR53 五联阀A35-AA440-MB53-MA53*2*XDX53*2-Z1 五联阀VA35-AA440-DB4-MA4X2-DAX2-Y55055    高位两联阀VA20-AA440-DA3X2-Z440 四联阀VA20-AA440-DA3X4-Y44044    低位两联阀VA20-AA440-HB333-HA333-Z440 二联阀VA35-2MA4-Z16     六联阀VA20-AA440-4DA3-HA333-HB333-Z440 VA35-AA440-MA4*2-DA4*2-Y55055   VA35-AA4-MB4-2MA4-XDR53-Z16   VA20-AA440-HB333-HA333-ZA40 VA20-AA440-DA3*4-Y44044    VA35-AA440-2MA4-2DA4-DB4-Z55055 柯摸索Commercial详细介绍：经营美国柯摸索Commercial各种联阀产品： 柯莫索二联阀A35-AA4-XDR53-XDR53-Z16 柯莫索三联阀A35-AA4-MB53-MA53-XDR53-Z16 柯摸索五联阀A35-AA4-MB53-MA53-MA53-XDR53-XDR53-Z16 柯摸索四联阀A35-AA4-MB53-MA53-2XDR53-Z16 柯摸索三联阀VA35-AA440-MA4-DA4-DA4-Z550 柯摸索六联阀A20-DA35x4-HB166x2-Z16  柯摸索阀片MA53 柯摸索五联阀VA35-AA440-DB4-MA4X2-DA4X2-Y55055 柯摸索三联阀A35-AA4-MB53X3-Y12 柯摸索六联阀A35-AA4-MB53-MA53X3-XDR53X2- 柯摸索六联阀A20-AA128-DA53DA53DA53DA53-HB166-HA166-Z16 派克，柯摸索VA20-AA440 VA35-AA440系列产品VA20 1 2联 VA20-AA440-DA3X2-Z440    4联 VA20-AA440-4XDA3-Z440        4联 VA20-AA440-HB330-HA322-2XDA3-Z440     6联 VA20-AA440-4XDA3-HB333-HA333-Z440  2联 VA20-AA440-HB330-HA322-Z440         6联 VA20-AA128-DA53X4-HB166-HA166-Z16 VA35 1 2联 VA35-AA440-MA4X2-Z16         3联 VA35-AA440-MB53-MA53-XDR53-Z16  3联 VA35-AA440-MB53-MA53-MA53-Y12        4联 VA35-AA440-MB53-MA53-MA53-XDR53-Z16  4联 VA35-AA440-MA4-MA4-DA4-DA4-Y50055     4联 VA35-AA440-MB4-MA4-MA4-XDR53-Z16  4联 VA35-AA440-MB53-MA53-XDR53-XDR53-Z16     5联 VA35-AA440-MA4-MA4-DA4-DA4-DB4-Z550  5联 VA35-AA440-MB53-MA53-MA53-XDR53-XDR53-Z16   5联 VA35-AA4-MB4-MA4-MA4-XDR53-XDR53-Z550  5联 VA35-AA440-MA4-MA4-DA4-DA4-DB4-Z55055    5联 VA35-AA440-MB4-MA4-MA4-XDR53-XDR53-Y35035  5联 VA35-AA440-DB4-MA4-MA4-DA4-DA4-Y55055     VG20-AA880-HA723-HB733-Z880 VG35-AA880-DB8-Z990   VG35-AA880-HB833-Z990   3479204930  VA20-AA440-DA3X4-Y44044 3479204031  3489205515    A35-AA4-MB53-MA53-XDR53-Z16 VA20-AA440-4DA3-Z440   VA35-AA440-MA4X2-DA4X2-DB4-Z550 A35-AA4-MB53-MA53-MA53-XDR53-XDR53-Z16   VA20-AA440-DA3-DA3-DA3-DA3-HB333-HA333-Z440 VA35-AA440-MB4-MA4-MA4-XDR53-XDR53-Z550   VA35-AA440-DB4-MA4X2-DA4X2-Y55055 A20-AA440-HB330-HA322-Z440    VA35-2XMA4-Z16 VA20-AA440-DA3X2-Z440    VA35-AA440-MA53X2-MB53-XDR53-Z16 VA20-AA440-DA3X4-Y44044     VA35-AA440-MB53-MA53-XDR53X2-Z16    VA35-AA440-DB4-MA4X2-DA4X2-Y55055 VA20-AA440-DA3-DA3-Z440      VA35-AA440-MB4-MA4-MA4-XDR53-XDR53-Y35035 VA35-AA440-MA4X2-DA4X2-Y55055       VA35-AA4-MB4-2XMA4-XDR53-Z16 VA35-AA440-2XMA4-2XDA4-DB4-Z55055    A35-AA4-MB53-2XMA53-XDR53-Z16*(PJ)   丹尼逊油泵 T6DM-B24-3R00-C1 P25X378BEIU257 3139115017  连续车             联数 A35-AA4-MB53-MA53-XDR53-Z16           3 VA20-AA440-4DA3-Z440           3 VA35-AA440-MA4X2-DA4X2-DB4-Z550           5 A35-AA4-MB53-MA53-MA53-XDR53-XDR53-Z16           5 VA20-AA440-DA3-DA3-DA3-DA3-HB333-HA333-Z440           6 VA35-AA440-MB4-MA4-MA4-XDR53-XDR53-Z550           5 VA35-AA440-DB4-MA4X2-DA4X2-Y55055           5 A20-AA440-HB330-HA322-Z440           2 VA35-2XMA4-Z16           2 VA20-AA440-DA3X2-Z440           2 VA35-AA440-MA53X2-MB53-XDR53-Z16           4 VA20-AA440-DA3X4-Y44044           4 VA35-AA440-MB53-MA53-XDR53X2-Z16   53X2-XDR53X2-Z16       5 VA35-AA440-DB4-MA4X2-DA4X2-Y55055           5 VA20-AA440-DA3-DA3-Z440           2 VA35-AA440-MB4-MA4-MA4-XDR53-XDR53-Y35035           5 VA35-AA440-MA4X2-DA4X2-Y55055           4 VA35-AA4-MB4-2XMA4-XDR53-Z16           4 VA35-AA440-2XMA4-2XDA4-DB4-Z55055           5 A35-AA4-MB53-2XMA53-XDR53-Z16*(PJ)           4             联数 A35-AA4-MB53-MA53-XDR53-Z16           3 VA20-AA440-4DA3-Z440           3 VA35-AA440-MA4X2-DA4X2-DB4-Z550           5 A35-AA4-MB53-MA53-MA53-XDR53-XDR53-Z16           5 VA20-AA440-DA3-DA3-DA3-DA3-HB333-HA333-Z440           6 VA35-AA440-MB4-MA4-MA4-XDR53-XDR53-Z550           5 VA35-AA440-DB4-MA4X2-DA4X2-Y55055           5 A20-AA440-HB330-HA322-Z440           2 VA35-2XMA4-Z16           2 VA20-AA440-DA3X2-Z440           2 VA35-AA440-MA53X2-MB53-XDR53-Z16           4 VA20-AA440-DA3X4-Y44044           4 VA35-AA440-MB53-MA53-XDR53X2-Z16   53X2-XDR53X2-Z16       5 VA35-AA440-DB4-MA4X2-DA4X2-Y55055           5 VA20-AA440-DA3-DA3-Z440           2 VA35-AA440-MB4-MA4-MA4-XDR53-XDR53-Y35035           5 VA35-AA440-MA4X2-DA4X2-Y55055           4 VA35-AA4-MB4-2XMA4-XDR53-Z16           4 VA35-AA440-2XMA4-2XDA4-DB4-Z55055           5 A35-AA4-MB53-2XMA53-XDR53-Z16*(PJ)           4 VA20-AA128-DA53-DA53-DA53-DA53-HB166-HA166-Z16               6   T6ED0620354R02A1M1 T6EC-052-010-3L001B1 4535VQ60A(50A)38-86-BB S26-34699-0-   6668618   T6DCB42B053200-CL         COMMERCIAL    PAIKER   VALVE   VA35系列 VA20系列          VA35-Z550    回油体 VA20-Z440        回油体 VA35-Y35035   回油体 VA20-DA4          换向联1 VA35-AA440    进油体 VA20-HB313       换向联2 VA35-MA4      换向联1 VA20-AA440       进油体 VA3-XDR53     换向联3   A35 A20 Z16          回油体 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