Winnebago Journey 34Y Owner's Manual page 156

SECTION 10 –
SLIDEOUT ROOMS AND LEVELING
NOTE: Overfilling the hydraulic reservoir can
cause leakage of oil through the breather
cap.
Hydraulic Fluid Recommendation
®
Dexron II or Mercon
transmission fluid is recommended for use in
your Leveling System.
DO NOT USE brake fluid or hydraulic jack
oil, which can damage the seals and cause leaks.
10-14
®
automatic