ROTARY SCREW COMPRESSOR

Industrial rotary screw compressors and system components including: refrigerated air dryers, desiccant air dryers, filters, drains, master controls, flow controllers, and modular distribution piping. Portable/towable screw compressors. Rotary lobe blowers and blower packages.

Tuesday, May 5, 2020

compressor pump repair, compressor pump service, how to rebuild a compressor pump



AIR COMPRESSOR PUMP SERVICE






Compressors draw in air and create a vacuum to reduce volume. The vacuum pushes the air out of the chamber and into the storage tank. Once the storage tank reaches its maximum air pressure, it should turn itself off.  If it doesn’t, you have issues….












Now, if the tank won't build pressure because the pump seals or valve plate are worn out or broken, you may need to rebuild the pump.  Please remember to use manufacturer-approved replacement parts. 














Shut off the electricity and bleed the air tank.

Remove the compressor belt guard and the belts off the pump pulley.

Remove the pump from the compressor bed plate.  It’s typically held down with 4 bolts.










Place the pump on a work bench.

Remove the bolts on the cylinder/ valve head and remove the valve head from the pump.






Take the pump to a test stand and hook it up to the electric motor.  Place a belt on the electric motor pulley and onto the pump pulley.











Turn on the motor and test the pump for suction.  Listen for any clanking and grinding.  In addition to that, watch the pistons go up and down in the cylinder head.  It you see oil leaking into the cylinder head…HOUSTON…WE HAVE A PROBLEM.  If you head any clanking…HOUSTON…WE HAVE A PROBLEM.  Leaking oil may indicate worn seals or rings or damage to the cylinders.  Clanking may indicate broken or worn inserts, broken piston rods, broken wrist pins; broken or worn crankshaft, etc. etc., etc.









Let’s remove the pump pulley.  You will need a pulley puller/ a screwdriver and a hammer (because you will need to remove the key from the crankshaft)  Using the screwdriver and hammer, gently tap the key from the groove in the crankshaft. After completing that task, it’s now time to remove the flywheel from the shaft.  Tighten the puller onto the back of the flywheel; use an impact gun and start extracting the flywheel from the shaft.










Time to break down the pump. Remove the bolts from the cylinder to the crankcase and remove the cylinder head and DRAIN THE OIL.
















Remove the piston/ inserts and rings.  Be very careful here not to mix up the inserts with the other piston rods.  Remove the wrist pins from the rods/ piston heads.




















It’s now time to tackle the crank case so you can remove the crank shaft and bearings.  You will probably need to remove the crankcase cover.  Be careful when removing the bolts.












Time to pull out the crankshaft from the crankcase.  Sounds easy but it might take some elbow grease. You may want to use a press here.  Actually, you really should use some sort of press here as the crankshaft was probably pressed into the crankcase when it was assembled.









After removing the crankshaft, you will need to remove the bearings and sleeve.  Again, a good puller will come in extremely handy here.  You can always use brute force to remove the bearings from the shaft but you risk injuring yourself and possibly the shaft.











Since everything is broken down; it would be a good time to hone the cylinders and wash all the parts carefully.  Use fine emery cloth to clean the pistons; remove all extra gaskets and debris from the valves, cylinder heads, etc.












Before you begin, please remember to wear work gloves to protect your hands and always use some sort of eye protection.  And as always, don't forget to turn off the electrical supply to your compressor before attempting anything. 












The compressor motor drives a piston that compresses air in the tank. Worn pump parts and seals prevent the pump from filling the tank with compressed air. If the pump won't compress air and fill the tank, rebuild the pump or call H&K PUMP @ 214-428-2868. 













214-428-2868

We service and repair most compressor pumps on the market today.  If you are looking for someone to completely rebuild your pump or looking to replace your pump with a new model: call…
214-428-2868

Ingersoll Rand pump repair
Quincy pump repair
Curtis pump repair
Champion pump repair
Atlas Copco pump repair
Jenny pump repair
Leroi pump repair
Kellogg pump repair










Remember, if you decide to try it yourself, here are just a few tools that you will need:



1. impact tools, wrenches and sockets, hammers, lock ring pliers, punches,  benches, and screwdrivers



2. an air compressor



3. a vice



4. a press



5. a torch



6. wire



7. a test stand



8. oil



9. pressure tester



10. grease/ lubricant



In total, you should have around $7K - 10K dollars just in tools and equipment in order to disassemble and rebuild your air compressor pump...




















WHAT DOES IT COST TO REBUILD MY PUMP?

The cost to rebuild a pump varies from one machine to another.  It typically takes anywhere from 1 to 2 hours to completely break down the machine and determine what the issues are.  To do it right, you should remove and replace your bearings; replace all the seals; replace all the gaskets; replace all the rings on both the high and low pressure pistons; replace the valves along with the valve gaskets; hone the cylinders and change out the oil.  This process with removing and pressing in the bearings and cleaning up the machine; reattaching all the lines and testing the machine on a test stand can and will take anywhere from 5-8 hours depending on the size and complexity of your pump.  The average cost to completely rebuild a 5-10 HP pump is anywhere from $500 - $1,500 dollars and will take between 2-5 business days to rebuild.  If done correctly, it should last you for decades to come.























214-428-2868



We service and repair most compressor pumps on the market today.  If you are looking for someone to completely rebuild your pump or looking to replace your pump with a new model: call…

214-428-2868



Ingersoll Rand pump repair

Quincy pump repair

Curtis pump repair

Champion pump repair

Atlas Copco pump repair

Jenny pump repair

Leroi pump repair

Kellogg pump repair





1.    





































































Air compressor pistons

Air compressor rings

Air compressor piston rods

Air compressor gaskets

Air compressor oil

Air compressor valves

Air compressor belts

Air compressor bushings

Air compressor bearings

Air compressor inserts

Air compressor bolts

Air compressor cylinders

Air compressor heads

Air compressor safety valves

Air compressor hoses

Air compressor plungers

Air compressor lines

Air compressor belt guards





HERE IS A LIST OF COMPRESSOR PUMPS THAT ARE NOT WORTH REBUILDING:

PORTER-CABLE
CRAFTSMAN
HUSKY
HITACHI
WEN
BOSTITCH
DEWALT
SENCO
CAT
MAKITA
SEARS

WHY?

Because many of the parts are made in China and may be difficult to locate.  In addition to that, it would cost more to fix the compressor pump than what it's worth.




















































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