This is a genuine OEM sourced replacement part used on Bostitch air compressors. The press.sw.4W 3/8in valve ul is composed of intricate metal and plastic parts. The pressure switch component is fastened onto the compressor tank, and its cord to the pump assembly. This part is sold individually. An adjustable wrench is needed in making the replacement.
Two things to be aware of for this repair:
1. Replace the fitting between the switch and reducer, if I would have known this I would have ordered it with the other two parts. This fitting as are the others are very difficult to remove, the glue and the amount of torque used to install them really contributes to it. I removed the swi
... Read moretch from the compressor and mounted it in a vise by the metal part of it to remove.
2. Where the pressure tube goes into the switch there is a release which allows you to remove the fitting the tube goes into, this makes it easier to remove the tube.
But it\'s done and works great, I\'m glad eReplacement parts was available, they had the exact replacement parts and priced very reasonably. I\'m gonna have to keep them in mind.
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Would not turn on
dennis from amana, Iowa
9 of 9 peoplefound this instruction helpful.
Difficulty Level:
Easy
Total Repair Time:
1- 2 hours
Tools:
Nutdriver, Screw drivers, Socket set, Wrench (Adjustable), Wrench set
To replace the pressure switch, I removed the parts that do not come with the new pressure switch. I removed the cover and noted how the wires were connected. Then remove the old pressure switch and installed the new one. I wired it the same as the old one , then installed the new pressure guage on it. I then connected the new pressure re
... Read moreducer to the switch, and used the parts from the old one and put them on the new one.
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Not working...
Richard from Waianae, Hawaii
4 of 4 peoplefound this instruction helpful.
Difficulty Level:
Difficult
Total Repair Time:
1- 2 hours
Tools:
Nutdriver, Pliers, Screw drivers, Socket set, Wrench (Adjustable), Wrench set
Tag / label everything you remove ... be careful , be patient removing and replacing what you need to replace or remove or transfer to your new part.... Mark, tag, color coat wiring and switch for easy reassembling... A vice/ liquid wrench and loctite is useful to have on hand. Take your time it took me two (2) hours straight from start t
... Read moreo finish... 2 Thin open end wrenches needed to remove gauge and nipple.... hope this helps.
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Bearing on crank went bad had to pull it off, thought I would replace other parts while it was apart
Piston is easy to put back if you take out the screw on top of piston and remove ring, install piston and then put ring in cylinder then replace round plate with screw!
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Compressor don\'t turn off....turn off switch dint work
Boris from Kissimmee , Florida
2 of 2 peoplefound this instruction helpful.
Difficulty Level:
A Bit Difficult
Total Repair Time:
30 - 60 mins
Tools:
Nutdriver, Pliers, Screw drivers, Socket set, Wrench (Adjustable), Wrench set
Removed the part from the old pressure switch, open the cover and removed the wires and made a wiring diagram. Installed the wires in the new switch and replaced the cover. Hooked up all of the parts to the switch
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Stock Status
This part is in stock in our warehouse and will ship out within 1 business day of the order being placed.
New stock is on the way! On order parts usually ship within 7 business days.
Item is not in stock and usually ships 10-15 business days from the time you place your order.
This item is no longer being made by the manufacturer, and cannot be added to your shopping cart.
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Mail-In Recycling Rebate
Some of the parts we sell are eligible for mail-in rebates since we can recycle them. We will display any applicable rebates in your shopping cart. To redeem your rebate, contact Customer Service after you have received your part.
