MST Aftermarket Seal Kits for Heavy Equipment | Ruijueparts

Product Description 5422890 is an aftermarket piston seal kit for the hydraulic lock of the rear carriage on MST backhoe loaders. It is used to reseal the piston within the locking mechanism that secures the rear excavator carriage assembly; it is not a standard boom, dipper, bucket or hydraulic control-valve...

Product Description 5442390 is an aftermarket hydraulic seal kit reference for the boom swing, or arm-rotation, cylinder on MST backhoe loaders. It supports the cylinder that pivots the excavator boom laterally, rather than the lift, dipper, or bucket cylinder. Published catalogs list MST M542, M544, M542 Plus, M544 Plus, M642,...

Product Description 5422790 is an aftermarket hydraulic seal kit reference for the excavator-side bucket cylinder on MST M542 and M544 backhoe loaders. It is used when a confirmed bucket cylinder is removed for resealing after leakage, seal wear, or loss of hydraulic holding performance. Parts catalogs associate this number with...

Product Description 5422690 is an aftermarket hydraulic cylinder seal kit for the excavator-side dipper arm cylinder on MST backhoe loaders. It is referenced for MST M542, M544, M542 Plus, and M544 Plus machines, with KK470 also appearing as a market reference. This kit is intended for cylinder resealing during repair...

Product Description 5422590 is an aftermarket hydraulic cylinder seal kit reference for MST backhoe loaders. Trade catalogs identify it as a “kazayak” cylinder repair kit, while published purchasing records describe it broadly as a boom-cylinder repair kit for an MST 544. As these sources do not establish one standardized English...

Product Description 5422490 is an aftermarket hydraulic cylinder seal kit reference for MST M542 and M544 backhoe loaders. Published parts catalogs list this number for both the telescopic dipper cylinder and the stabilizer cylinder, so the installed cylinder group must be confirmed before ordering. It is not a universal boom...

Product Description 5422190 is an aftermarket bucket lift cylinder seal kit reference for MST M542 and M544 backhoe loaders. Parts catalogs identify it as a bucket-lift hydraulic cylinder repair kit. It differs from 5422090, referenced for the front boom lift cylinder, so the two kits should not be interchanged. Because...

Product Description 5422090 is an aftermarket front boom lift cylinder seal kit reference for MST backhoe loaders. Catalogues identify it for the loader boom lift hydraulic cylinder on MST M542/M544 families, rather than the rear excavator boom, bucket cylinder, or steering system. This matters because front-loader and rear-backhoe cylinders can...