Backhoe loader cat 428B bucket lifting is very very slow but bucket tilting is good. So what l did was to check primary and secondary resolver valves so l found that all primary resolvers seals were worn out so l changed 3 of them but still bucket lifting is slow then other thing l got qstn to ask if the spool has got too much end play dose it cause to loose proper function cos bucket lifting spool had got too much end play to such extend when you run the machine after some minutes the bottom part of bucket lift valve bank became hot ,so l am stuck l dnt know what to do
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