Power-Up / Power-Down vs Spring Retraction


		HWH Corporation (On I-80, Exit 267 South) 2096 Moscow Road Moscow, Iowa 52760 Phone: (563)724-3396 or (800)321-3494 Fax: (563)724-3408 Business Hours: 8 a.m. - 5 p.m. Central Time (M-F)
The World's Largest Manufacturer of RV Leveling & Room Extension Systems

	Power-Up / Power-Down vs Spring Retraction
	Power-Up / Power-Down More compact, eliminates the space required for retract springs. Jack retract is faster in cold weather. If jacks freeze to ground hydraulic power will normally break them loose. If jack penetrates asphalt, soft ground etc. hydraulic power will normally retract the jack. Ice, snow, mud etc. has little effect on jack.	Spring Retraction Lower Cost, eliminates the honed tubing, piston and one hydraulic line. Jacks will normally retract down to -30° F. At -30° F retract time is approximately 15 to 20 minutes. If jacks freeze to ground gently moving vehicle forward and reverse will normally break them loose. (See note 1.) If jack penetrates asphalt, soft ground etc. gently moving vehicle forward and reverse will normally allow the jacks to retract. Ice snow mud etc. can hinder jack retraction. Washing in water normally resolves problem.
	Note 1 Trailers equipped with power-up/power-down landing gear and spring return jacks on rear can free rear spring return jacks stuck to ground by lowering front jacks. Lowering the front jacks causes the trailer to pivot on the axle raising the rear thus pulling rear jacks out of the ground.