What can cause a hydraulic pump to fail?
Over pressurization: Pressure relief settings may have been adjusted or changed, and are now higher than what the pump can withstand without causing damage. Pumps don’t produce pressure, they produce flow and are built to withstand pressure. When the system pressure exceeds the pump design, failure begins—either gradually or catastrophically.
What do you need to know before replacing a hydraulic pump?
Make sure the oil is clean, the oil filer changed on schedule, and that there are no entry points for contamination like water, dust, or dirt from a reservoir filler cap that is unfiltered or missing, seals in motors or cylinders that are allowing contaminants in, etc.
Can a greasable PTO shaft replace a hydraulic pump?
Using a greasable PTO shaft and being sure to include adding grease as part of the regular maintenance program. Using larger pump and PTO shafts will not eliminate fretting, but may resolve the problem because of the increased metal available before the failure occurs. Cavitation – the pump has been starved of oil.
Which is the best company to rebuild a hydraulic pump?
Top Hydraulics, Inc. also offers rebuild services for most modern convertible top hydraulic pumps, and Top Hydraulics manufactures NEW, high pressure hydraulic top hoses for most brands.
Why is my Hyd pump not working on my SL500?
The hyd pump will not lift the roof up. the trunk moves back out of the way and the plastic flap lifts up, but the main roof will not raise up, the pump just keeps running. One other related problem that started about a month ago was that the Hyd pump would not stop running when the roof was raised up in the trunk.
How many hydraulic pumps does a Mercedes SLK have?
R170 SLKs have five hydraulic pumps that work in concert to lower and raise the hard top into the trunk. If the top fails to function properly, one of the diagnoses is to look for hydraulic fluid leaks — the cylinders’ seals eventually go bad.
What should I do if my hydraulic pump fails?
In any case, when replacing a failed hydraulic pump you will want to make sure to use this opportunity to also change out your hydraulic fluid (or at the very least use a filter cart and filter your oil).
Why is my Mercedes SL500 roof not retractable?
One other related problem that started about a month ago was that the Hyd pump would not stop running when the roof was raised up in the trunk. I had to re press the red swith in the trunk to stop the pump motor. So I suspect so form of a sensor switch somewhere but–:surrender: