First you must identify the model of your HWH leveling system/slide system, as each model has different components.
This will help:
HWH system quick ID
Once you have ID'ed your model, download the free HWH service manual for your model # system. It has an excellent troubleshooting section.
Do you know where the motor/tank assy is located?? If you do check the oil level. The tank will have a filler cap on top with a dipstick, OR if it's a plastic tank it usually has marking on the side. Check oil level with jacks retracted or you over-fill.
Do not use hydraulic jack oil! The owners manual and service manual for your model # ID the correct fluid
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2000 Winnebago Ultimate Freedom USQ40JD
, ISC 8.3 Cummins 350, Spartan MM Chassis. USA IN 1SG 11B5MX,Infantry retired;GS Life member,FMCA
" My fellow Americans, ask not what your country can do for you, ask what you can do for your country. John F. Kennedy