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Holland Dollie > Accumulator Systems
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An accumulator charged with nitrogen acts like a spring when connected to hydraulic circuit with the dolly cylinder. As illustrated below, the accumulator will displace oil to the dolly cylinder if the dolly encounters a dip in the road. Under the opposite circumstances, the accumulator will accept oil displaced by the dolly cylinder when the dolly travels over a rise in the road. All of this acts to maintain a relatively constant weight on the Holland Dollie.

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