hydraulic repairs

How We Can Help You!

It has hit me that many of our customer may not know all the services we offer.

So here is a quick ‘low down’ in case I haven’t gone over everything that we can help you with.

With everyone watching their bottom line these days, we hope you’ll look to Power Components as THE source for all your fluid power repair needs.

We provide world-class service and unmatched value on everything from:
Power units
And more..
We service many makes and models including Vickers, Parker, Rexroth, Oilgear and many others.

In addition, we are happy to work on all you OEM construction or Agricultural heavy equipment.

Something else in another category that we have not listed, not to worry, dedicated staff will do their best to make it like new again.

As a Power Components customer, you’ll also enjoy a one-year warranty on all repairs completed by our full-service hydraulic repair shop located inside our 58,000 square ft. Fort Wayne facility.

Our staff includes many of the same fluid power professionals you already know and rely on, with a combined 138 years of hydraulic expertise on our Power Components team.



Craig Cook

Our hydraulic testing beast

Say hello to our “beast”!


Okay so it isn’t exactly a beast BUT it is a huge bench that allows us to test every aspect of any hydraulic component.

When you have us repair or rebuild any hydraulic component, it goes through rigorous testing on our hydraulic test stand.

We use the test stand for:

  • Pumps
  • Cylinders
  • Valves
  • Motors (spin test)

Every repair goes through testing on this bench to make sure it meets and exceeds the needs your requirements.

If you need anything repaired feel free to give us a call at (260) 426-4673.

Till next time,
Craig Cook

The Best Time for a Maintenance and Reliability Audit

The BEST time to carry out a maintenance and reliability audit on a piece of hydraulic equipment is BEFORE you buy it.

By starting with the end in mind, you get the reliability outcomes you desire – before the machine even gets delivered.

For example:

You specify the contamination control targets you want to achieve based on your reliability objectives for the piece of equipment.

And instruct the manufacturer to deliver the machine appropriately equipped to achieve these targets.

Based on the weight and viscosity index of the hydraulic oil you plan to use, you determine the minimum viscosity and therefore the maximum temperature you want the machine to run at.

And instruct the manufacturer to deliver the machine equipped with the necessary cooling capacity, based on ambient temperatures at your location. Rather than accepting hydraulic system operating temperatures dictated by the machine’s ‘design’ cooling capacity – as is the norm.

And we could continue by specifying things like flooded inlet for all pumps and so on. But you get the idea.

So the next time you or the company you work for are looking to acquire hydraulic equipment, begin with the end in mind.

Define your maintenance and reliability objectives in advance and make them an integral part of your equipment selection process.     Craig Cook

Part 2 Of Hydraulic Troubleshooting Guide 101

Here’s part 2 of our 3 part series on hydraulic trouble shooting 101. 

STEP 3 – Pump or Relief Valve…

If high pressure cannot be obtained in STEP 2 by running the pump against the relief valve, further testing must be conducted to see whether the fault lies in the pump or in the relief valve. Proceed as follows: If possible, disconnect the reservoir return line from the relief valve at point H. Attach a short length of hose to the relief valve outlet. Hold the open end of this hose over the reservoir filler opening so the rate of oil flow can be observed. Start the pump and run the relief valve adjustment up and down while observing the flow through the hose.

If the pump is bad, there will probably be a full stream of oil when the relief adjustment is backed off, but this flow will diminish or stop as the adjustment is increased. If a flowmeter is available, the flow can be measured and compared with the pump catalog rating. If a flowmeter is not available, the rate of flow on small pumps can be measured by discharging the hose into a bucket while timing with a watch.

For example if a volume of 10 gallons is collected in 15 seconds, the pumping rate is 40 GPM, etc. If the gauge pressure does not rise above a low value, say 100 PSI, and if the volume of flow does not substantially decrease as teh relief valve adjustment is tightened, the relief valve is probably at fault and should be cleaned or replaced as instructed in STEP 5.


If the oil substantially decreases as the relief valve adjustment is tightened, and if only a low or moderate pressure can be developed, this indicates trouble in the pump. Proceed to STEP 4.

STEP 4 – Pump…


If a full stream of oil is not obtained in STEP 3, or if the stream diminishes as the relief valve adjustment is tightened, the pump is probably at fault. Assuming that the suction strainer has already been cleaned and the inlet plumbing has been examined for air leaks, as in STEP 1, the oil is slipping across the pumping elements inside the pump. This can mean a worn-out pump, or too high an oil temperature.

High slippage in the pump will cause the pump to run considerably hotter than the oil reservoir temperature. In normal operation, with a good pump, the pump case will probably run about 20F above the reservoir temperature.

If greater than this, excess slippage, caused by wear, may be the cause. check also for slipping belts, sheared shaft pin or key, broken shaft, broken coupling, or loosened set screw.


I’ll give you step 5 and 6 in my next post.
Craig Cook

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