Originally Posted by TXredfish
I had a similar retraction problem with my left front jack not retracting. I cleaned the jack shaft using transmission fluid. Then used a cotton swab with transmission fluid to clean the seal above the shaft. It works a little slower than the other side but is retracting OK. After cleaning with the trans fluid wipe off as much as possible. Some people use WD40 but must be wiped clean. the trans fluid is the same as used in the resevoir.
Several posts said to use WD40 and not to wipe them off - I usually spray mine with it, wipe with a clean rag LIGHTLY so as to not scratch the surface and then respray them again and not wipe them off - no issues in several years doing this.
If they slowly retract it's probably one of the solenoid valves that need replacing and as for retracting, if the rams are clean and they still don't retract you may need to replace the springs. They have a newer style spring out now that is significantly stronger than the old ones and if your unit had them extended all winter they might have just stretched and lost some of their strength.