Question about 3Com 3C16592A HUB 12-PT 10/100BTX SS2 (NS3C1031)

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How to remove the cover

The cooling FAN is not working in one of my 3Com 3C16592A HUB 12-PT .
How can I remove the Cover safely.


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Just to add that the cooling fan is 40x40x10 mm, 5V DC.

Posted on Dec 09, 2011


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If this is a rackmount style... there are 2 or more torx style screws on the bottom side (I'm looking at a 3C16671A) which you will need to remove. If there is an expansion board which slides into a backside slot, then this board will likely need to be removed first too. Also on the backside may be a couple of plastic hooks which help to clip the top on.

Once all retention screws are removed the cover can be lifted backside up some first, then slide towards front some, then clear off. Don't force anything...

I think the cooling fan is the same size as often used on the old 486, Pentium, Pentium II, and some Pentium III heatsink assemblies.

Posted on Jan 08, 2008


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Hi there,
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Posted on Jan 02, 2017

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1 Answer

Front seal replacement 5.9 cummins

Hi Dale, I'm glad to help! Below is the removal procedure for the front crankshaft seal on your 5.9 cummins engine. Hope this helps and have an awesome day!


  1. Disconnect both battery negative cables.
  2. Raise vehicle on hoist.
  3. Partially drain engine coolant into container suitable for re-use (Refer to 7 - COOLING - STANDARD PROCEDURE).
  4. Lower vehicle.
  5. Remove radiator upper hose.
  6. Disconnect coolant recovery bottle from radiator filler neck and lift bottle off of fan shroud.
  7. Disconnect windshield washer pump supply hose and electrical connections and lift washer bottle off of fan shroud.
  8. Remove viscous fan/drive assembly. (Refer to 7 - COOLING/ENGINE/RADIATOR FAN - REMOVAL).
  9. Remove cooling fan shroud and fan assembly from the vehicle.
  10. Remove the accessory drive belt (Refer to 7 - COOLING/ACCESSORY DRIVE/DRIVE BELTS - REMOVAL).
  11. Remove the cooling fan support/hub from the front of the engine.
  12. Raise the vehicle on hoist.
  13. Remove the crankshaft damper and speed indicator ring.
  14. Remove power steering pump.
  15. Remove accessory drive belt tensioner.
  16. Remove the gear cover-to-housing bolts and gently pry the cover away from the housing, taking care not to mar the gasket surfaces. Remove crank seal dust shield with cover.
  17. Support the cover on a flat work surface with wooden blocks (Removing Seal from Cover), and using a suitable punch and hammer, drive the old seal out of the cover from the back side of the cover to the front side(Removing Seal from Cover).

Apr 10, 2014 | 2004 Dodge Ram 2500

1 Answer

Find me a Gateway zx4300 all in one repair manual


Could you?

Would appreciate?

Thank you in advance?

Let\'s try to maintain a professional approach here, even if it is only an illusion...............

Moving on..............

I see from search hits on the internet;

That the problem may be no graphics, due to graphics chipset mounting; due to inadequate cooling for the graphics chipset.

\'Repair\', (Ha I like how they toss that word around), is to replace the motherboard.
Then upon a certain amount of time later, the same issue happens again.

\'Repair\'? ............Oh, yeah...............replace the motherboard again.

This = NO solution

Are there no REAL techs out there anymore?

To PROPERLY repair the problem, you must STOP the cause from happening again.

Otherwise it\'s like bumping your head against a hard object, only to repeat it again.............., again, and again..........No learning ability.

No learning as to what caused the problem in the first place, and try to develop a long lasting solution to the problem.

I believe that is somewhere along the lines of snail mentality.

Not homo sapiens.

[Do snails have a measurable mentality? I - don\'t - know.
Hey it\'s MY solution, lol! Tell this story anyway I want]

No, keep the h-ate mail. I realize this isn\'t a Service Manual, nor pictorial disassembly guide.
You gets what I gets.

1) Have your ESD wrist strap on? Connected the aligator clip to a good ground source? Average cost is around $3 to $5.

This is a laptop disguised as a desktop computer.
Once you remove the Back Cover, and the large metal Static Shield, the highly static sensitive hardware parts are now exposed.

You can static shock them out, and not even know it.
POOF! No computer.

[The most susceptible hardware component to Static shock, is the Processor. (CPU ]

2) Views of the casing parts, and Stand; shown removed.
Posted because it becomes more apparent, how removal should proceed.

You can see the screw holes, and determine where the screws are.
Labels, small cover, etc; may be in the way, not allowing this.

You can get a \'feel\' of where each cover component, fits together with each other. Helps to simplify removal.

How removal of a small cover, etc; may lead to get to the Stand\'s hinge screws.

At least that is the premise.........

Stand -

Rear Cover - views, shown removed,

Outside view, Inside view, and Side views; of the Back Cover, removed.

Large metal Static Shield. Also known as Fan Cover.

This because it also directs the flow of air from the fan, over the various hardware components that need cooling.

Looks highly inadequate for the job; to me,

Front Bezel,

Suggest use a multi-compartment container, for the various screws you will remove.
Label each compartment for the area the screw/s come out of.
SOME screws look VERY similar to other screws.
Advise DO NOT mix them up.

In the video;

A) Where the young gentleman states using a credit card, (1:16), and popping all the little clips off..........

Umm, not quite like that.............
They don\'t come off.
You are just removing the Back Cover FROM the mounted clips, on the metal frame.

The credit card depresses those metal clips. Releases the Tabs on the Back Cover.

Case parts from front to rear;
Front Bezel / Back Cover / Rear Cover
Duck and Cover ( gonna\' believe that last one?)

Rear Cover:
Looks to be 2 small Philips head screws to remove.
1 at each Top corner.

Bottom of Rear Cover has 2 U-shaped Latches. These SIT on Tabs.
When screws are removed from Top, ease the top out towards you a little; then lift up, and out.

Hinged Stand:
Looks to be 2 screws each, to remove from the Hinge\'s brackets.
Could be wrong, may be 1 each, but of course YOU will know.
You\'re looking at it, lol!

Back Cover:
Remove 1 screw each from all four outside corners. (Philips)
Using the credit card, slide around the area, in-between the Back Cover, and metal frame.
Remove Back Cover.

Cooling System:
Cooling Tube, Heatsink, Fan Assembly

In the video look at 2:47 (Or in-between shakes. Not bad mouthing)
Here is a better view, just upside down,

(You can click to enlarge)

Here you see the curved copper Cooling Tube.
Come from the black Fan Assembly, up the Cooling Tube; and stop at the first small aluminum metal plate.

Six rivets, three on each side; two long small metal \'arms\' sticking out.
That small aluminum plate sits on the GPU.
(Graphics chipset, or more properly known; GPU.
Graphics Processing Unit)

Come up to the large cast Aluminum plate. Four long small \'arms\' stick out, make an X-pattern.
That plate sits on the CPU. (Processor)

Fan Assembly:
That weird D-shaped black shroud, with the small black multi-bladed fan in it.

That rectangular shaped area at the bottom, of the Fan Assembly.

Fan Assembly removes, and first. Unplug fan cable from motherboard.

Heatsink is part of Cooling Tube.
4 screws to remove from processor plate, 2 screws to remove from graphics chipset metal plate.

Lift Cooling Tube/Heatsink off.

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Mar 30, 2013 | Gateway One Computers & Internet

1 Answer

Hi to all i have canon ir6570 model my problem is E824-001 it seems that the primary cooling fan working properly could someone describe the wiring connection of the primary cooling fan

Most likely the primary cooling fan connector has been left unplugged. Open the front door and look under the control panel just to the left of the filter. There will be a gray cover that will have to be removed. This covers the connector to the fan. Remove the cover and check to see if the fan is plugged in. If this is correct then unplug the fan connector and then go ahead a remove the two other screws on the duct on the far right side. Remove the duct and make sure the fan is plugged in to the duct connector. Never had any other problem further in the fan wiring than that.

Apr 06, 2011 | Canon imageRUNNER 5570 Copier

3 Answers

How do you replace water pump?

Assuming this is a 460 Ford Big Block:


-Drain cooling system.
-Remove drive belts.
-Remove bolts attaching fan shroud to radiator.
-Remove fan blade from fan clutch and remove fan shroud.
-Remove fan clutch and water pump pulley from water pump.
-Remove four bolts and one nut attaching A/C compressor mounting bracket to cylinder head and water pump. Do not remove A/C compressor or power steering pump from A/C compressor mounting bracket.
-Pull A/C compressor mounting bracket forward to remove from stud on water pump.
-Remove bolt attaching generator adjusting arm to water pump. Remove four bolts attaching generator mounting bracket to cylinder head, cylinder block and water pump.
-Remove remaining water pump attaching bolts and remove water pump from engine front cover.
-Remove water pump cover from water pump. Discard water pump housing gasket and water pump cover gasket.
-Remove any gasket material from water pump cylinder front cover and separator plate mating surfaces.
-Position new water pump housing gasket and water pump cover gasket coated on both sides with Perfect Seal Sealing Compound B5A-19554-A or equivalent water-resistant sealer meeting Ford specification ESE-M4G115-A.
-Position water pump and water pump cover onto engine front cover. Install bolts and tighten to16-24 Nm (12-18 ft. lbs.).
-Install generator mounting bracket to cylinder head, cylinder block and water pump with four attaching bolts. Install generator adjusting arm to water pump with one attaching bolt. Tighten 7/16-inch bolts to 54-71 Nm (40-53 ft. lbs.) and 3/8-inch bolts to 41-54 Nm (30-40 ft. lbs.).
-Position A/C compressor mounting bracket over water pump stud and secure to cylinder head with four bolts tightened to 54-71 Nm (40-53 ft. lbs.) and secure nut to water pump to 41-54 Nm (30-40 ft. lbs.).
-Install water pump pulley and fan clutch to water pump hub with four bolts. Install fan blade to fan clutch with four bolts. Tighten water pump pulley, fan clutch hub bolts, and fan-to-fan clutch hub bolts to 16-24 Nm (12-18 ft. lbs.). Install fan shroud.
-Install drive belts.
-Fill and bleed the cooling system.
-Start the engine and check for leaks

Jan 10, 2011 | 1997 Ford F350 Crew Cab

2 Answers

Coleman model 5645 inside fan motor not working .. how do you open the cover to get to the fan and motor

pull straight up on the cover. Remove the 4 screws that hold the fan to the heat sink. You can then remove the 2 torx screws and remove the heat sink if you need to. Clip the wires as close to the bad fan as possible so you will have enough for the new fan.

Feb 01, 2010 | Coleman Electric Cooler 40 Beverage Cooler

1 Answer

Hi, my refrigerator is making a loud noise and it stops and starts about every 12 minutes. It is cooling fine. Can you help me? It is a side-by-side model that is only 4 years old. Thanks. This problem...

Good day,
Open the freezer door, and see if you can hear the fan motor, that is located behind the rear panel.
If it's the source of the noise, then you will have to remove the rear panel to access the fan motor.
If not, go to the back bottom of the machine, remove the back cover and see if the cooling fan motor that cools the condenser and compressor s working properly.
If it's alright, then it will probably be a problem with the compressor itself.
STOP !! The compressor has one year left on it's warranty.
Call your selling dealer for warranty service. This is an expensive repair and altering the machine can void the factory warranty.

Thank you for using FixYa

Jan 05, 2010 | Whirlpool 25.6 cu. ft. Side-by-Side...

1 Answer

How to put a starter on

3.8L Engine
1991-92 VEHICLES

  1. Disconnect the negative battery cable.
  2. Remove the right side cooling fan.
  3. Remove the serpentine drive belt, as outlined in of this repair guide.
  4. Disconnect the A/C compressor upper support brace, then lay the compressor in the fan opening.
  5. Raise and safely support the vehicle.
  6. Detach the engine oil cooler lines at the flex connector.
  7. Unfasten the retaining bolts, then remove the flywheel inspection cover.
  8. Remove the starter motor retaining bolts, carefully lower the starter and remove the shims, if used.
  9. Detach the starter motor wiring, then remove the starter from the vehicle.


Fig. Fig. 12: Starter motor removal and installation-1992 3.8L engine shown
To install:
  1. Attach the electrical connectors to the starter terminals. Tighten the battery terminal nut to 80 inch lbs. (9 Nm) for 1991 vehicles and to 12 ft. lbs. (16 Nm) for 1992 vehicles. Tighten the "S'' terminal nut to 27-35 inch lbs. (3-4 Nm).
  2. Position the starter motor and shims, if used, to the engine and tighten the mounting bolts to 32 ft. lbs. (43 Nm).
  3. Install the flywheel inspection cover. Tighten the retaining bolts to 89 inch lbs. (10 Nm).
  4. Attach the engine oil cooler lines at the flex connector.
  5. Carefully lower the vehicle and position the A/C compressor.
  6. Install the A/C compressor upper support brace.
  7. Install the serpentine drive belt, as outlined in of this repair guide.
  8. Install the right side cooling fan
  9. Connect the negative battery cable.

Fore other engine and sub-models, review (free register).

Hope helped with this (remember rated this help).

Oct 29, 2009 | 1992 Chevrolet Lumina

1 Answer

Top freezes but bottum doesnt cool

The fan has quit working or is blocked. The fan is usually located in the back of the freezer, under a cover. this is easily changed if you have access to parts and a few tools, you can probably replace it yourself. Unplug frig while removing fan and the cover, remove the fan attaching screws, unplug the wire, reverse sequence for installation. It is safe to leave the frig plugged in while you get replacement fan. Whirpool makes Kenmore so you may be able to get the fan at Sears parts center.

Jun 28, 2009 | Whirlpool 21.0 cu. ft. Top Freezer...

2 Answers

Cant open my safe

Hi, Afraid to ask, but is it that you need to know how to put batteries in? If so Turn the electronic lock clockwise ( to the right) from the 12 o'clock position to the 2 o'clock position which opens it so you can put in 4 fresh AA batteries replace the assembly by turning it to the left from the 2 o'clock back to the 12 o'clock. enter your combination and check for the green light. Good Luck!

Feb 01, 2009 | Sentry Fireproof Safe

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Nov 11, 2019 | Best Computers & Internet

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