Tech Tips Wiki
Welcome to our hydraulic elevator tech tips section.
Here we encourage your community contribution by submitting your own hydraulic elevator technical tips. Ever get stuck in a difficult situation? Want to share some of your expertise? Go ahead and submit your tip with the form below and we will add them to our wiki!
Tech Tips
Down Leak or Oil Shrinkage…how to tell the difference?
A common misconception of a down leak comes from…you guessed it, oil shrinkage. For every 50°F (10°C) of cooling will result in an approximate 2% shrinkage of oil per volume. Therefore, a 6 inch piston would equal ¼ inch of oil shrinkage per foot of travel. So in 50 feet of travel the car would drop 1 foot during this drop in temperature. Next time you have a customer complaining about the elevator re-leveling during the night this example might be the culprit not a down leak.Billy Shrum
Technical Manager
Technical Manager
Can you set BPS with just one man?
Absolutely! Wait how will I see the car move or not? No worries. All you need is a pressure gauge, optimally two gauges. Connect gauges to A and B ports. When the pump pressure (A port) is 25 psi less than the system (static) pressure (B port) you have set the BPS. You’re the one man show.Billy Shrum
Technical Manager
Technical Manager
How can I tell how fast the car is moving without a tachometer?
Here is a rule of thumb to measure slower speeds: Use your handy tape measure to determine how many inches the car travels in 5 seconds. For example 10 inches in 5 seconds equates to 10 ft/min of car speed. This will get you close however we recommend you use a tachometer for accuracy…preferably a SafeTach.Billy Shrum
Technical Manager
Technical Manager