RRH Double acting hollow plunger jackDetailed product description：

1、 RRH series hollow jack: This jack not only has all the functions of a regular jack, but also has stretching function, and is used for steel cables, cables, and shafts.

2、 RRH double acting hollow plunger jack (double acting hollow jack)

model	Carrying capacity T	Journey B-A mm	Body height Amm	Extension height Bmm	Outer diameter mm	Center aperture mm	Weight Kg
RRH-307	thirty	one hundred and seventy-eight	three hundred and thirty	five hundred and eight	one hundred and fourteen	thirty-three point three	twenty-two
RRH-3010		two hundred and fifty-seven	four hundred and thirty-two	six hundred and eighty-nine	one hundred and fourteen	thirty-three point three	twenty-seven
RRH-603	sixty	eighty-nine	two hundred and forty-eight	three hundred and thirty-seven	one hundred and fifty-nine	fifty-three point eight	twenty-eight
RRH-606		one hundred and sixty-five	three hundred and twenty-four	four hundred and eighty-nine	one hundred and fifty-nine	fifty-three point eight	thirty-five
RRH-6010		two hundred and fifty-seven	four hundred and thirty-eight	six hundred and ninety-five	one hundred and fifty-nine	fifty-three point eight	forty-six
RRH-1001	one hundred	thirty-eight	one hundred and sixty-five	two hundred and three	two hundred and thirteen	seventy-nine point two	thirty-nine
RRH-1003		seventy-six	two hundred and fifty-four	three hundred and thirty	two hundred and thirteen	seventy-nine point two	sixty-one
RRH-1006		one hundred and fifty-two	three hundred and forty-two	four hundred and ninety-five	two hundred and thirteen	seventy-nine point two	seventy-nine
RRH-10010		two hundred and fifty-seven	four hundred and sixty	seven hundred and eighteen	two hundred and thirteen	seventy-nine point two	one hundred and seven
RRH-1508	one hundred and fifty	two hundred and three	three hundred and forty-nine	five hundred and fifty-two	two hundred and forty-eight	seventy-nine point five	one hundred and eleven

3、 Instructions for using RRH double acting hollow plunger jack
1. Before use, it is necessary to check if all parts are functioning properly.
2. When using, the main parameters should be strictly followed, and overloading should be avoided. Otherwise, when the lifting height or lifting tonnage exceeds the regulations, serious oil leakage will occur at the top of the oil cylinder.
3. When the oil volume of the manual pump body is insufficient, it is necessary to first add N33 # hydraulic oil that has been thoroughly filtered to the pump before it can work.
4. Please refer to the user manual for the electric pump.
5. The center of gravity of heavy objects should be chosen moderately, and the force point of the jack should be reasonably selected. The bottom should be leveled, and the soft and hard conditions of the ground should be considered. Whether to pad with tough wood and place it steadily should be ensured to avoid sinking or tilting of the load.
6. After lifting the heavy object with a jack, it should be firmly supported with a support in a timely manner. It is forbidden to use the jack as a support. If you need to support heavy objects for a long time, please use CLL self-locking jack
7. When several jacks are needed to lift at the same time, in addition to correctly placing the jacks, multiple diversion valves should be used, and the load of each jack should be balanced, paying attention to maintaining synchronous lifting speed. It is also necessary to consider the possibility of the ground sinking due to uneven weight, in order to prevent dangerous tilting of the lifted object.
8. When using, first connect the quick connector of the manual pump to the top, then select the position and tighten the oil drain screw on the oil pump to start working. To lower the piston rod, slightly loosen the handwheel of the manual oil pump in a counterclockwise direction, unload the oil cylinder, and gradually lower the piston rod. Otherwise, if the descent speed is too fast, it will pose a danger.
9. This jack is a spring reset structure that can be quickly removed after lifting, but cannot be pulled by a connected hose.
10. Due to the small lifting stroke of the jack, users must not exceed the rated stroke when using it to avoid damaging the jack.
11. Avoid severe vibration of the jack during use.
12. Not suitable for use in workplaces with acidic, alkaline, and corrosive gases.
13. Users should regularly check and maintain according to their usage