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Monthly Archives: September 2014

  • Ultra High Working Pressure Hydraulic Equipment

    The advancement of hydraulic technology, material strength and continuous design improvements has allowed Zinko to launch a whole new line of Ultra High Pressure Hydraulic Equipment.





    The Ultra High Pressure product line boasts working pressures of up to 40,000 psi. The combination of high strength alloy material and high working pressures allow smaller footprints and lighter weight than similar capacity hydraulic equipment.

    It is very important to match all components in an Ultra High Pressure system to ensure safe operation. The Zinko sales team can help design a complete Ultra High Pressure system to meet your lifting requirements call us at 909-230-4100 or send an email to Sales.

  • Unit Converter

    Here is a handy unit converter application to bookmark and use on this page or download and use when you need to convert from imperial to metric or vice-versa. It also allows you to convert common measurements including: Area, Flow Rate, Length, Mass, Pressure and temperature.

    Unit Converter Download

    As you can see it allows for these common conversions:


    Square Meters to Square Feet

    Square Feet to Square Meters

    Square Centimeters to Square Inches

    Square Inches to Square Centimeters

    Flow Rate

    Gallons Per Minute to Liters Per Minute

    Liters Per Minute to Gallons Per Minute

    Gallons Per Minute to Cubic Inches Per Minute

    Cubic Inches Per Minute to Gallons Per Minute

    Cubic Inches Per Minute to Liters Per Minute

    Liters Per Minute to Cubic Inches Per Minute


    Millimeters(mm) to Inches(in)

    Inches(in) to Millimeters(mm)

    Centimeters(cm) to Inches(in)

    Inches(in) to Centimeters(cm)

    Meters(m) to Feet(ft)

    Feet(ft) to Meters(m)

    Meters(m) to Inches(in)

    Inches(in) to Meters(m)

    Kilometers(km) to MIles(mi)

    Miles(mi) to Kilometers(km)

    Meters(m) to Yards(yd)

    Yards(yd) to Meters(m)


    Kilograms(kg) to Pounds(lb)

    Pounds(lb) to Kilograms(kg)

    Pounds(lb) to Grams(g)

    Gram(g) to (lb)

    Pound(lb) to Tons(T)

    Tons(T) to Pounds(lb)

    Pounds(lb) to Metric Tons(mt)

    Metric Tons(mt) to Pounds(lb)


    PSI to Bar

    Bar to PSI

    PSI to KPa

    KPa to PSI


    Celsius(C) to Fahrenheit(F)

    Fahrenheit(F) to Celsius(C)

  • How to Change the Hydraulic Oil in Various Zinko Jacks

    Fluid – primarily hydraulic oil – is the main lifeline of every reliable hydraulic jack, be it bottle jacks, toe jacks, service jacks or anything in between. The hydraulic oil is what transfers the mechanical force from the pump to push a larger piston to do the heavy lifting. Without hydraulic oil, the jack or cylinder wouldn't be able to perform its usual tasks of lifting heavy loads, that’s why it is incredibly important to check the cleanliness and level of the hydraulic oil in your hydraulic jack to keep it working correctly.

    how to change oil_3

    If you want to DIY (do it yourself) here are some quick steps on how to change the oil of your hydraulic jacks:

    To begin with, you are going to need a few tools to get this job done . What you will need is a screwdriver, pair of pliers, a small funnel and possibly a small hydraulic pump.

    Obtain the correct hydraulic fluid DO NOT USE: brake fluid, motor oil or automatic transmission fluid, those oils were not designed to be used in high pressure hydraulic systems and may damage or corrode the seals as well as the inside of your jack’s oil reservoir due to chemical composition and the additives that can swell the seals and make them leak. We can provide you with replacement oil or you can use an equivalent ISO 150 or AW-32 hydraulic oil.

    Once you have your tools ready and new oil it is time to drain and refill the jack:

    1. First thing you need to do is lower or collapse the jack’s ram by opening the release valve, which is a small screw-like bolt located near the jack’s main pump.
    2. Locate the jack’s oil plug and remove it (not to be confused with the other screw with a rubber cover that says DO NOT ADJUST). For floor jacks, most plugs are placed right under the main pump but can be on the main reservoir, when in doubt consult a parts breakdown or call us for help. On bottle jacks the oil plug is almost always located on the side of the cylinder.
    3. Drain the jacks oil completely and operate the pump with the release valve open to clear out those passages.
    4. Refill the jack using a funnel or oil pump, slowly fill the jack with the correct hydraulic oil. Make sure the reservoir is full. For most jacks fill until oil starts to drip from the fill plug. Service jacks often require the cylinder to be lifted to the vertical position and filled until oil starts to drip from the fill plug. Do not overfill the jack with too much oil as pressure will build in the reservoir and cause problems.
    5. When the correct amount of oil has been replaced pump the jack a few times with the release valve still open to get hydraulic oil to circulate through the hydraulic system and push the air out now re-install the jack’s oil plug.
    6.  The jack is ready to be operated, tighten the release valve then give it a few pumps to ensure that the jack is working properly.

    how to change oil_2

    Under constant or heavy duty use it is highly-suggested to check your hydraulic oil frequently for fluid level and condition. Standard oil changes are required every 6 months to 1 year however in harsh conditions and heavy duty use oil contamination can occur quickly and frequently lowering the replacement to every week to one month.

    You might also like to check this video out for more visual references.

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