Thread: 4BD1 Alternator

there is another option, this requires no oil supply plumbing etc unlike the alternator vacuum pumps.

BRAKE VACUUM PUMP CITROEN AX VISA C15 FORD GRANADA | eBay

the peugeot old 504 and 505 diesels ran these, plenty around at the wreckers. the best bit is that they are small, belt driven, quiet, and you can rebuild them with new diapragms etc.

jc

Depends on which Landy the 4BD1 is in.
The early engines in the Stage1 came with 12V 40 Amp externally regulated units and as far as I know, the later engines had the 12V 70A Hitachi alternator LR170-401, internally regulated.
You will see this number quoted a lot on ePay, but those alternators are usually the copies, rebranded by U.S. companies.
They are still the goods and at half the cost of OEM, delivered, I consider them a good buy.
Remember, the original 40 Amp has a foot spacing of around 100mm, whereas the LR170-401 is around 80mm.

Hope this helps.

Originally Posted by circlework

Depends on which Landy the 4BD1 is in.
The early engines in the Stage1 came with 12V 40 Amp externally regulated units and as far as I know, the later engines had the 12V 70A Hitachi alternator LR170-401, internally regulated.
You will see this number quoted a lot on ePay, but those alternators are usually the copies, rebranded by U.S. companies.
They are still the goods and at half the cost of OEM, delivered, I consider them a good buy.
Remember, the original 40 Amp has a foot spacing of around 100mm, whereas the LR170-401 is around 80mm.

Hope this helps.

G'day Circlework,

Thank you for your response, it fills in the gap about what the product code to a specfic unit - LR170-401. There were quite a few which were supposedly a match to the 4BD1 on eBay.

Kind Regards
Lionel

Originally Posted by justinc

there is another option, this requires no oil supply plumbing etc unlike the alternator vacuum pumps.

BRAKE VACUUM PUMP CITROEN AX VISA C15 FORD GRANADA | eBay

the peugeot old 504 and 505 diesels ran these, plenty around at the wreckers. the best bit is that they are small, belt driven, quiet, and you can rebuild them with new diapragms etc.

jc

G'day Justin,

A brake vacuum pump is certainly something which I didn't consider as an option. I was going to get an oil cooler and put in a couple of junctions to run to the alternator oil feed/return off as well.

Kind Regards
Lionel

Hello All,

I have just been offered an alternative for an alternator - one off a 4BE1 which is off a 3.6 litre Isuzu - for a good price and immediately available … in Australia.

Does it matter if the alternator suits a 3.6 litre diesel instead of the 3.9? The main thing is it to provide an oil feed for the vacuum line for the brake booster and is 12 volt supply? I am still waiting for a reply from the supplier to establish that the alternator does have a vacuum line so this may or may not be an option.

The thing is that I have a ex-Army GS sitting in Tamworth waiting for me to get the time to pick it up and it has a 3.6 litre Isuzu motor in it a 4BB1. So the alternator for the 4BE1 could fit it too? So why don't I just get the alternator of the Tamworth GS you ask - because I cannot remember if it still has an alternator fitted to it when I last saw it, 6 months ago. Especially whether the alternator - present or not - has a vacuum line? It was a pretty rushed trip and I did not take any photos.

Kind Regards
Lionel

I recall reading somewhere that alternators are designed to turn in a particular direction - some are CW and some are CCW.

There are a number of diesel vehicles that ran vacuum pumps on the alternators. Ones that I definitely know of are:
- Early 4.2 Patrols
- Some 2.8/3.0L Rodeo's
- LR 4BD1's

Apart from being 12V and having the vacuum pump, you also need to consider:
- mounting foot spacing, and where the adjustment mount point is located
- you need to mount it with the vac pump oil drain pointing down
- some are externally regulated, some are internal
- single or double row drive pulley. Singles are usually wider section belt. Doubles are 2 narrow belts.

Another option for brake vacuum is an electric vacuum pump. Pretty sure there were some VW diesels that had them fitted.

Steve

Lionelgee ... can't find the Landy p/n, but the Isuzu# for the LR170-401 is
8-94175-448-1.
Probably moot, now you're going with the used Isuzu.

Originally Posted by circlework

Lionelgee ... can't find the Landy p/n, but the Isuzu# for the LR170-401 is
8-94175-448-1.
Probably moot, now you're going with the used Isuzu.

G'day Circlework,

Thank you for the information, it is not a moot point anymore as I will be going down the road of the 70 amp LR170-401.The bloke did not get back to me when I asked for more information about the alternator he had. So either it did not have the features I needed or it has since been sold.

Well I will get the 4BD1 alternator not long after I work out what size oil cooler to fit into Baldrick. Serck Oil Coolers come in a choice from 10 rows to 44 rows. I am still trying to work out how many rows would be best for a 2.25 litre Land Rover diesel?

I will be using Baldrick as a tow vehicle. This is what started me on the current odyssey because I would like something a bit better than the original single circuit non-boosted brakes. I am upgrading the brakes to dual circuit 6 cylinder brake fittings including brake booster/servo unit as well.

So if I have to fit new oil lines so the alternator can provide a vacuum source to run the brake booster, I might as well throw in a couple of extra junctions and cool things down with an oil cooler while I am at it.

Kind Regards
Lionel