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Discussion Starter #1
Apologies if I've missed the relevant info. Can any of you let me know what tool to purchase for this? Local factors had a single lazer brand tool which didn't fit but could supply a universal lazer kit for 90 quid. Is there a single tool available? Maybe a cheaper kit? Anyone know the exact size?
Thanks in advance.
John.
 

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From memory it is a T50, there are always cheap eBay kits with a couple of sizes for a tenner or so.

People have bodgef them off welding/grinding etc but not the most elegant..

A local independent would probably whip the old one off for you for a few quid.
 

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Sorry to bring up an old thread but this was the first i found on the subject
So it appears my altenator pulley is on its way out and looking on line its by far cheeper to replace that than to buy a complete unit!
However i dont have a impact gun! But i see on some tools theres a bar to hold the centre shaft while another goes over it and engages the spline in the pulley!
Is the navara like this or has it got to be removed using a impact gun?
Im not against buying a tool kit to remove it, if it will work but buying a impact gun is a bit too much £$€
 

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So today went to drop the wife off at work and on the way back the occasional click click noise has changed to a constant squeal!
So i had another look at it and found the plastic cover has now come off revealing the bearings them selves and i found there seams to be some bearings already missing?
So todays mission is find somewhere with one in stock.
Looking closely at the fitting though i was expecting to see a socket on the shaft to hold it still while undoing the pulley but there dosent seam to be one!
How do i hold the shaft still while i undo the pulley?
 

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Maybe an impact driver will spin it off?

Or a few small welds so the pulley is always running?
I did think about a weld but surely theres a good reason why theres an elaborate clutch system on the alternator?
As regards to an impact driver, i dont have one! and if i disable the truck by removing it, the closest garage is a taxi ride away
But if theres no other way ........
 

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I can't see any other method apart from locking off the alternator by wedging the armature through a vent hole and using an impact driver. You may want to consider buying an alternator complete with pulley, £100 more expensive but would end up about the same as going to a garage to get the pulley replaced.
 

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Did mine last week

I researched how to remove the alternator pulley and found that the pulley removal kits do not work for our type of alternator. My local shop quoted AUD$350 to remove and fit a new pulley. They told me I wouldn't be able to get the pulley off myself, we will see about that!
I bought the pulley from Autobarn and fitted it myself for AUD$69.00. Had to remove the alternator from the vehicle to replace the pulley.
To remove alternator, top bolt removes from the front and the more difficult one from the bottom rear of the alternator.
Before tackling the pulley I sprayed WD40 in to the thread area to help with getting it off.
I then used a 17mm inhex socket with a rattle gun and just held the pulley with my hand and gave the gun a few hits, came of easily despite the alternator spinning. I guess the sharp knock of the rattle gun overcomes the fact that the rotor also spins at the same time. Did the same for replacing.
I was not at all keen to wedge something in the alternator to prevent it spinning as the rattle gun runs a chance of bending fins or damaging wiring.
Replacing the alternator was the most difficult part of the job. Trying to line up the bottom lugs of the alternator so the long bottom bolt can be reinserted. You can't see where it goes to line it up and must do it by feel. Best to put the top bolt back in and leave it loose while you swing the alternator back into position to get the bottom bolt back in. While I was at it I replaced the two idler pulleys and the power steering belt and serpentine belt.
 

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