Forum Discussion

Gjac's avatar
Gjac
Explorer III
Nov 16, 2017

Leak in hydraulic line for rear jack

I went to jack up the rear tires today and my hydraulic line sprung a leak where it rubbed against undercarriage. I have the HWH 200 series system and have a Hydraulic diagram from their web site but can't determine how the lines are routed. From the diagram it looks like there are two lines attached to the pump one for pressure and one for return. It looks like there is some sort of junction that feeds the RH and LH jacks both front and rear. I just can't find where these lines attach. Has anyone replaced one of the rear lines and know where to find this junction?
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  • HWH pumps run at 2900 to 3200 PSI. You do NOT have to replace the complete line. IF the Shop has a tool(I do), you can install the metal flare ends on the end of the bad hose in front of the damaged area(cutting out the hose from the jack to the damaged spot) and then just make a short hose to go from the original to that Jack. Saves time and money. Doug
  • Ivylog's avatar
    Ivylog
    Explorer III
    I would try and find a hydraulic repair shop that has a portable crimping tool and see if they can splice the line at the leak.
  • Shop in Missoula used this hose.
    55LT-04
    They used 10656-04-04 swivel connects.
    My new pump relief says it is set at 3500 PSI. I think you have the same pump.
    This might help
    1/4 HWH hoses
  • Best way is to find the white tag.
    The Skyflex sounds correct.
    I think my new pump is around 2000 PSI.
    I will go out and get info from my rig.
  • Gjac's avatar
    Gjac
    Explorer III
    Thanks Bud and Doug for the explanation, the hydraulic diagram showed the junction somewhere in the middle and confused me. After I posted this I remembered seeing these lines coming out of the joy stick box when I changed the circuit board several years ago. The lines look like some sort of black plastic, is there a braid under the outer plastic? I can read Skyflex 1/2 OD .062 wall thickness on one of the lines,do you all know what the working pressure for these lines are?
  • HWH jacks have ONLY 1 line per jack. Your system. EACH Jack line goes from the Jack to the JOYSTICK control. NO other lines and they are each separate. NO junction or T. You are confusing the 2 lines that go from the Joystick to the actual reservoir/pump. The Pump has just 1 high pressure line from the Joystick to the Pump. The other line is a larger diameter line and is a LOW pressure line since there is NO pressure when retracting your HWH jacks. Doug

    There are 5 Pressure lines. 4 lines for the 4 jacks and 1 line from the Pump to the Joystick.
  • Gary, make sure it is the line going to the control and not the short one right at the jack.
    I had to use a paper knife to cut the tag off as I could not read it.
  • Yes, Gary, I have replaced several of the lines over the years.
    First, look near the connector at the jack. There should be a small tag wrapped around it with the part number for hose, as well as the diamter and the length in inches.
    Next the hose will connect to the back of the joy stick on the side that is leaking. Two hoses come out the back for corresponding sides. The front of the joy stick has three lines. The one in lower center is feed from the pump the upper ones are for the corresponding front side jacks.
    I had onemade in Montana at a hydraulic shop rather then getting it from HWH. Quicker and about the same price.