Question about Porter Cable 4 5 Gallons 150PSI Job Boss Oil Lube Mobile Air Compressor ? C3551

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Why can't i get over 35 lbs on my job boss air compressor?

My job boss compressor will go to 35lbs and will go no higher,but will stay running

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Check for internal leaks in compressor - compression rings on the cylinder braking often.
Another problem would be fittings or piping leak - usually a simple O-ring replacement will do a job.

Posted on Oct 19, 2017

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Posted on Jan 02, 2017

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SOURCE: compressor runs and runs but only builds 40lbs pressure

At the web address below you will find a parts list of your compressor. The most likely problem areas are the tube seal and the piston/cylinder. The tube seal seals the discharge tube to the head of the compressor. It will fail over time and cause the problem that you have. (only costs a few dollars) The other problem that you could have is a worn cylinder. Your compressor is oil free thus the piston ring is made of silicone vinyl and wears depending on conditions at the job site. Heavy dust/ dirt will shorten the life of the unit. With unit unpluged and covers removed, push the piston to top of stroke and examine upper portion of cylinder. If you see groves/scratches install cylinder kit. (cost around 39 dollars) In most cases I would replace both the seal and cyl kit. These parts are also available at your local dewalt service center or on line at dewalt.com. The folks at dewalt are very helpfull. Good luck with your repair and email if you have more questions.


http://www.ereplacementparts.com/porter-cable-cpfac2040p-type-pancake-compressor-parts-c-129_1662_2199.html

Posted on Mar 26, 2009

  • 142 Answers

SOURCE: job boss compressor wont run

have you checked the motor reset
will be on the motor

Posted on May 11, 2010

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Torque spec's for the fly wheel


Ford Engine Bolt Torque Chart Bolt Torque Spec Chart for Ford Engines

These specs are for stock-type bolts with light engine oil applied to the threads and the underside of the bolt head. Moly and other lubes offer reduced friction and increased bolt tension, which will affect the torque figure. If you use after-market performance bolts like ARP's, you should follow the recommended torque specifications.

260, 289, 302 Torque Spec.
Fastener Type Torque Spec Main cap bolts 60-70 ft-lbs Outer main cap bolts 35-40 ft-lbs. Connecting rod bolts (40-45 ft-lbs. for 289 HP & Boss 302) Cylinder head bolts 65-72 ft-lbs. Rocker arms 17-23 ft-lbs. Intake manifold bolts 23-25 ft-lbs Oil pump bolt 23-28 ft-lbs. Cam bolts 40-45 ft-lbs. Cam thrust plate bolts 8-10 ft-lbs. Harmonic damper bolts 70-90 ft-lbs. Flywheel / flex-plate bolts 75-85 ft-lbs. Pressure plate bolts 35 ft-lbs. Front cover bolts 12-15 ft-lbs. 351W Torque Spec.
Fastener Type Torque Spec Main cap bolts 95-105 ft-lbs Connecting rod bolts 40-45 ft-lbs. Cylinder head bolts 90-100 ft-lbs. Rocker arms 17-23 ft-lbs. Intake manifold bolts 23-25 ft-lbs. Oil pump bolts 23-28 ft-lbs. Cam bolts 40-45 ft-lbs. Cam thrust plate bolts 8-10 ft-lbs. Harmonic damper bolt 70-90 ft-lbs. Flywheel / flex-plate bolts 75-85 ft-lbs. Pressure plate bolts 35 ft-lbs. Front cover bolts 12-15 ft-lbs. 351C, 351M Torque Spec.
Fastener Type Torque Spec Main cap bolts 95-105 ft-lbs. Connecting rod bolts 40-45 ft-lbs. (45-50 ft-lbs. For Boss 351C) Cylinder head bolts 105 ft-lbs. (125 ft-lbs. For Boss 351C) Rocker arms (non-adjustable) Rocker arms (non-adjustable) 5/16in. intake manifold bolts 21-25 ft-lbs. 3/8in. intake manifold bolts 28-23 ft-lbs Oil pump bolt 25 ft-lbs. Cam bolts 40-45 ft-lbs. Cam thrust plate bolts 9-12 ft-lbs. Harmonic damper bolt 70-90 ft-lbs. Flywheel / flex-plate bolts 75-85 ft-lbs. Pressure plate bolts 35 ft-lbs. Front cover bolts 12-18 ft-lbs. 360, 390, 406, 427, 428FE Torque Spec.
Fastener Type Torque Spec Main cap bolts 95-105 ft-lbs. Crossbolts for 406-427 40 ft-lbs. Connecting rod bolts 40-45 ft-lbs. (53-58 ft-lbs. For 406 and 427) Cylinder head bolts 80-90 ft-lbs. (100-110 ft-lbs. For 1963-67 427) Rocker arm shaft bolts 40-45 ft-lbs. Intake manifold bolts 32-35 ft-lbs. Oil pump bolt 12-15 ft-lbs. Cam bolts 40-45 ft-lbs. Harmonic damper bolt 70-90 ft-lbs. Flywheel / flex-plate bolts 75-85 ft-lbs. Pressure plate bolts 35 ft-lbs. Front cover bolts 12-15 ft-lbs. 429-460 Torque Spec.
Fastener Type Torque Spec Main cap bolts 95-105 ft-lbs Connecting rod bolts 40-45 ft-lbs. Cylinder head bolts 140 ft-lbs. Rocker arms (non-adjustable) 18-22 ft-lbs. Intake manifold bolts 25-30 ft-lbs. Oil pump bolt 25 ft-lbs. Cam bolts 40-45 ft-lbs. Harmonic damper bolt 70-90 ft-lbs. Flywheel / flex-plate bolts 75-85 ft-lbs. Pressure plate bolts 35 ft-lbs. Front cover bolts 12-18 ft-lbs.

Dec 18, 2015 | Cars & Trucks

2 Answers

What is the correct tire pressure for a 1998 buick park avenu


32lbs to 35lbs. make sure all tires have the same pressure. then you will have to drive to reset the light.

Aug 24, 2014 | Cars & Trucks

1 Answer

Chevy van


Smoking issues after warm start up are usually caused by brittle valve stem seals and oil leaks down through the valve guide. These can be changed on the engine without head removal. Just use a air compressor to keep the cylinder full of air with the valves closed then remove the rocker arms counting the number of turns to keep adjustment. With a on car spring compressor remove spring. The valve keepers can be tight in retainer so tapping the retainer with released tension they will break free. Most chevy heads have 2 oil seals a hat type (positive spring seal) and a o-ring seal. With spring removed take both seals off there are very brittle. Replace the hat seal first then install spring with retainer. the o-ring seal needs to stay in retainer and in lower groove then install valve keepers and slowly release the spring pressure, Once spring compressor is removed then tap valve stem with hammer to seat keepers then release air. Also check Intake manifold bolts for proper torque. A loose manifold will also **** in oil bolt torque is 35-40 ft. lbs cast iron 30-35 ft. lbs aluminum manifold.

Nov 05, 2013 | 1992 Chevrolet G20

1 Answer

My Porter Cable Job Boss compressor won't shut off. It builds up pressure but just continually runs.


Pressure switch - replace as soon as possible
Overpressure would be possible in that tank - it is dangerous !

Oct 20, 2012 | Porter Cable 4 5 Gallons 150PSI Job Boss...

1 Answer

Air Compressor will only pump up to 35lbs.


The two main areas to inspect if your pressure isn't going over 35psi are the valve plate and piston/cylinder assembly. If the reed valves on the valve plate are bent, warped or broken, usually attributable to high heat, they won't seal well enough to get higher pressures. If the cylinder is badly scored or the piston and/or piston rings are damaged, usually attributable to running the pump motor with low or no oil, the seal between them won't be good enough to get the pressure any higher.

Aug 13, 2012 | Craftsman Air Tools & Compressors

1 Answer

Bought new porter cable oiless boss compressor and want to know what i need to do before operatining it for intial use


The first thing is to make sure the compressor pump has oil!

Run the unit with the tank drain open for 10 minutes to break the compressor and rings in. Let the motor cool for 30 minutes and then use the compressor as normal.
Make sure to change the oil every 50 hours of use

Sep 26, 2010 | Porter Cable 4 5 Gallons 150PSI Job Boss...

1 Answer

Job boss compressor wont run


have you checked the motor reset
will be on the motor

May 10, 2010 | Porter Cable Cable 4.5 Gallons 150PSI Job...

1 Answer

Compressor wont put out any more than 35Lbs.


Does it shut off at any point when it is trying to reach the required pressure or is the blow off valve activating

Check to see if there is a one way valve in the line to the reciever.

It will be a fitting with an arrow on it point in the direction of the reciever

They can get clogged up and stay open , the compresser then is unable to obtain its full output thanks to the back pressure from the tank which is counteracting the motor.

Or

The piston seals can become worn and allow air to escape back down the bore of the cylinder .

Or even the inlet and outlet valves lose their ability to seal

If the machine has done a lot of work then you need to look at obtaining an overhaul kit to re-condition the worn parts

Jul 04, 2009 | Campbell Hausfeld 5 Peak / 1.7 Running HP,...

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