How do you install the alternator on a 95 Isuzu Trooper?

Answer 1

I have a 1995 Isuzu model UBS69 and replaced the alternator on this vehicle some weeks back.

Start by disconnecting and removing the battery and moving all wiring associated with the battery away from the area around the air conditioning compressor.

The next step is to remove the air conditioning compressor and to do this start by removing the drive belts, the tensioner for the AC drive belts is on the top RHS side of the motor, release the tensioning securing bolts and release the tension on the drive belts then remove them.

Things are fairly simple and straightforward up to this point, now it is time to remove the AC compressor from it's mounts, there are 2 upper mounting bolts and 2 lower mounting bolts, three of these bolts are easily accessible however to remove the lower rear mounting bolt you may need to remove the turbo charger delivery hose, accessing the lower rear AC mounting bolt is quite tricky and can take a little while to remove.

Once the AC bolts are removed you should be able to lift the AC compressor out of the way without disconnecting the AC piping or hoses, you do not want to disconnect them as you will lose you AC gas charge, once moved out of the way and up towards the LHS of the engine bay you can tie it in place to stop it from annoying you or getting in the way.

When the AC unit is out of the way you release the tension on the alternator drive belts and then remove the belts.

You are now able to remove the alternator securing bolts and cock the alternator over on its side sufficiently to release vacuum lines, oil line to vacuum pump and wiring.

When these have been removed the alternator is free to be able to be removed from the vehicle.

Installation is the opposite to removal, however before installing new unit ensure that you put some oil into the vacuum pump through the fitting that the lube line connects to (the line that comes from the engine block) so as to not have it running dry for the first few moments of operation until your oil pressure comes up, and tension the alternator belts before reinstalling the AC compressor as it is easier to do this at this point of the procedure.