Balmar XT-DF-170-J10 mounted on Yanmar 3YM30?

[rgleason]

Link about advantages of Serpentine Belts

[rgleason]

Kenbo advises in another thread that:

I've been building these for a few years for folks. I use 12SI cases for non yanmar engines and 10SI cases for Yanmars. There's a Chinese supplier for 80mm (3.14") Yanmar mounts but only in the 10SI format.

Internally regulated usually and external bridge rectifier using 210V rectifiers. I try to keep folks from over winding the alternator and typically use 105A stators. They run fairly cool as long as you don't go crazy on the stator winding. Built about a dozen so far and only one failure. Not sure but I think the guy had a short in one of his batteries.

Typical automotive bridge rectifiers use 6-30V diodes, 3 pos and 3 neg. Balmar and others that supply the recreational marine market use 6-50V diodes. There are some 70V rectifiers available for the SI series of Delco Remy alternators. I use those bridge rectifiers to build remote set ups.

I still have not heard a word from Balmar regarding confirmation of the installation of a $900 XT alternator on a Yanmar 3YM30, and voiding the warrantee by cutting the + terminal down, to install it. Nor do I know if this will even work, or if my proposal below has been confirmed to work. Nobody seems to have installed this alternator on a 3YM30, and Balmar does not have any record of the XT installed on a 3YM30.


The unknowns for the Balmar XT installation and the Delco 28SI are about equal, but the cost is not! I am about to bag Balmar.

[witzgall]

We are aware of the fitting issues with that particu.ar engine, and are working on a solution. More information will be available in a few days.

Chris

Originally Posted by rgleason

Kenbo advises in another thread that:


I still have not heard a word from Balmar regarding confirmation of the installation of a $900 XT alternator on a Yanmar 3YM30, and voiding the warrantee by cutting the + terminal down, to install it. Nor do I know if this will even work, or if my proposal below has been confirmed to work. Nobody seems to have installed this alternator on a 3YM30, and Balmar does not have any record of the XT installed on a 3YM30.


The unknowns for the Balmar XT installation and the Delco 28SI are about equal, but the cost is not! I am about to bag Balmar.

[rgleason]

Thank you Chris, for that information.


Since I am now reconsidering installation of a

Standard Delco SI28 160amp Short J180 mount #8600312 for $199,

I should probably consider MarineHowTo

CMI-ED200-ER - 200A Large Frame Extreme Duty Alternator -J180 Mount $599 which is a "super" Delco 28SI with the same dimensions, requiring special mounting and brackets.

• Uses the Delco 28SI Case.
• Built in-house.
• Only thing outsourced is the stator & rotor winding. (I do not know from the MarineHowTo writeup if these stators and windings are delco standard or something special.)
• Modified for external regulator.
• 80A avalanche diodes mean longer life and better protection from load dumps
• Can operate at 257F instead of 200F.
• Better bearings and high temp solder used.

One major advantage is the alt does not need modification to use an external regulator.

[Pete O Static]

I installed a 160 amp Balmar with serpentine kit onto my 3YM30. The only place where I had a clearance issue and it was more of being at a clearance limit was on the outer edge of the adjustment foot and the engine room wall. I went one size down on the belt to accommodate this.

[Balmar LLC]

We have verified a fitment issue with the Balmar XT-170 alternators and Yanmar 3YM30 engines. The B+ post comes in contact with the engine. To correct this issue, both the stud and the spacer need to be shortened.

If you already have a XT alternator with this issue, you can return it to Balmar and we will perform the modifications required. Please start the process by visiting our warranty and return webpage, and filling out the RMA form linked from there.

If you wish to order a new XT alternator with the modification, you can order this from your normal Balmar reseller. You should not order directly from a web page, as the part will need to be fulfilled from us, and not from dealer stock. Rather, talk to you dealer, and ask them to add a "SP" on the end of the part number when they order from us, AND include instructions that the alternator is to be shipped with the "3YM30" modification. It is important that both of these steps are followed.

Chris

[rgleason]

@ Chris [Balmar]
Thanks for the response, that is helpful. I will be talking at greater length with Dale, but if the + terminal is modified by the user, does that void the warrantees? I have some photos from that fitment, from Tom, may I post them?

@ Pete O Static
Is that an AT alternator? It looks like you could have gained more space (1-1.5") by hacksawing off the outside part of the bracket at the appropriate angle.

Is that an exhaust fan in the upper part of the engine compartment? Perhaps you should consider turning it around to be supply and locating it close to your alternator intakes?

[rgleason]

Pete O Static
Thank you for your post.

160 amp Balmar with serpentine kit onto my 3YM30. The only place where I had a clearance issue and it was more of being at a clearance limit was on the outer edge of the adjustment foot and the engine room wall. I went one size down on the belt to accommodate this.

I am assuming this is an AT 160 alternator. I understand you used a shorter belt due to clearance problems.

Some more questions:
- Did you end up paying for the longer standard belt?
- What type of regulator?

- What size & type of battery bank do you have?
- When the batteries are low, what continuous output do you see? For how long?


Thanks very much.

[rgleason]

I did get a response back from Balmar confirming the installation. Dale fitted XT-DF-170-J10 (3.15" Dual Foot) with a Balmar AltMount Serpentine Pulley Kit for the Yanmar 3YM30 48-YSP-3YM-B and found that the B+ bolt had to be trimmed for clearance from the exchanger. He took two pictures of the installation and Chris sent them to me. I will try to find them. I believe Chris said the factory would trim the bolt if requested.

[Maine Sail]

Originally Posted by kenbo

A question you may want to ask balmar is "can the cases be split and rotated so the clock position can be changed". If so that may give you the clearance you need.

It can't be split and clocked due to the saddle mount.

[Maine Sail]

Originally Posted by rgleason

I believe Chris said the factory would trim the bolt if requested.

Let the factory modify this for you..

[kenbo]

Originally Posted by Maine Sail

It can't be split and clocked due to the saddle mount.

Haha, that was one of my brain cramps, thanks!

[rgleason]

I just found the photos of the Balmar XT mounted on a 3YM30 with the factory modification to shorten the bolt. Thomas Pulsari sent these to me, but Dale English did the modification and tested it.


It is best to have Balmar do the modification to keep the warrantee I think.

[FlyingScot]

Old thread, but related. Balmar will now build 3YM modified XT170 alternators with isolated ground.

I have two that I will be installing once I get them down here in Curacao.

[Amycolo1]

For anyone that’s installed the AltMount serpentine belt kit on a 3YM30, how did you keep the new belt from chaffing on the coolant hose?

I’m thinking I’ll take the little factory hose bracket, cut the end off and weld it on in the inverted position. But hoping someone has a better idea.

Thanks ahead of time!