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Old 05-08-2019, 19:35   #1
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Balmar XT-DF-170-J10 mounted on Yanmar 3YM30?

Has anyone tried mounting a Balmar XT-DF-170-J10 (3.15" Dual Foot) with a Balmar AltMount Serpentine Pulley Kit for the Yanmar 3YM30 48-YSP-3YM-B ?

If so, can you advise regarding the clearances from the heat exchanger for the +Terminal that is coming out of the back, and on the wrong side?

The fourth page of this pdf shows the +terminal bolt location on the back of the alternator, and the side view below that shows the protrusion of the bolt from the back of the back foot to the end of the bolt is 1.61" http://www.balmar.net/wp-content/upl...DF-170-J10.pdf


It looks like it is impossible to difficult to install this alternator on a 3YM30 yet they were designed for Yanmars. If anyone has done so successfully, please explain what you found, or perhaps attach some photos.



Thank you.
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Old 09-08-2019, 17:24   #2
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Re: Balmar XT-DF-170-J10 mounted on Yanmar 3YM30?

It seems that Balmar has not made the xt series compatible with the 3ym30 series..
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Old 09-08-2019, 18:27   #3
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Re: Balmar XT-DF-170-J10 mounted on Yanmar 3YM30?

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.
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Old 10-08-2019, 04:11   #4
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Re: Balmar XT-DF-170-J10 mounted on Yanmar 3YM30?

Kenbo,
Yes that can be done with SF single foot, but it is difficult with DF double foot 3.15" because the feet don't line up.
We had thought of that

So what is wrong with making it single foot? Why was it double foot to begin with?

The 3ym30 bracket is mounted on the engine with the foot hole pointed up.

Can the bracket be reversed or modified to be low rather than high, so the bracket is turned around and is pointing down with the foot hole low? This is the arrangement that other yanmars have and is how the xt expects to be mounted. Then the 1.6" + terminal has a chance to miss the heat exchanger when the alternator is pulled out to the port side.

I will try to take some photos.
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Old 10-08-2019, 05:55   #5
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Re: Balmar XT-DF-170-J10 mounted on Yanmar 3YM30?

There may be a way to do this.
1. Do not use the 3.15 double foot attachment on top.
2. Turn the alt 180 deg and use the lower heavy 1"x 1.25 built in bracket with two holes, to build a 3.15" foot attachment with spacers for the xt-df-170-j10 foot.
3. Then mount the adjustment bracket on top, using the bolt for the belt protection bracket.
4. The belt cover and brackets will have to be removed.
5. The system water hose bracket support will have to be extended a little to miss the new wider serpentine belt.
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Old 10-08-2019, 06:02   #6
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Re: Balmar XT-DF-170-J10 mounted on Yanmar 3YM30?

There is room to the port side to swing the alt out, so stud may miss the exchanger.

There is about 7" between the double foot bolt and the new lower double foot location.

There is maybe 1" clear at the back of current balmar 90-65 alt (about 20 yrs old).

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Old 10-08-2019, 06:08   #7
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Re: Balmar XT-DF-170-J10 mounted on Yanmar 3YM30?

Some other photosClick image for larger version

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Old 10-08-2019, 06:12   #8
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Re: Balmar XT-DF-170-J10 mounted on Yanmar 3YM30?

One more with measurement to the port. I would like to add 1" insulation to the refridge.

And one photo for where the new double foot location will be, in lieu of the existing adjustible bracket.Click image for larger version

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Old 10-08-2019, 07:03   #9
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Re: Balmar XT-DF-170-J10 mounted on Yanmar 3YM30?

I have Yanmar 3HM35F (obviously not your engine, but it may be a useful idea). When I bought the boat it did not have the stock alternator. Instead a 2" single foot alternator was mounted with a few spacer washers on the bolt hole that would normally hold the alternator adjusting bracket and the adjusting bracket was mounted on the hole that would normally hold the double foot alternator alternator. The refrigeration compressor was mounted where the alternator would normally be. Here is a picture.

At the limit of the belt adjustment the CS130D alternator just touches the oil filter.

Bill
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Old 17-08-2019, 08:00   #10
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Re: Balmar XT-DF-170-J10 mounted on Yanmar 3YM30?

Bill wrote:
Quote:
Instead a 2" single foot alternator was mounted with a few spacer washers on the bolt hole that would normally hold the alternator adjusting bracket and the adjusting bracket was mounted on the hole that would normally hold the double foot alternator alternator.
That is very helpful, thank you Bill. Looks like there are lots of ways to skin the cat. I made some measurements of the existing Dual Foot 3.14" Balmar 95-65 alternator, and there appears to be 2" between the heat exchanger and the back of the alternator. See attached.

The width between
1. The port side of the engine, the surface that the current Dual Foot bracket bolts to
2. to the plywood on the port side of the engine compartment
is about 10 1/2".

The width between the Dual Foot engine surface (#1 above) and the current alternator is about 2" to the CL of the DF bolt is 2.5", leaving about 4" clearance between the alternator and the port side engine compartment plywood (#2 above).

The lower heavy 1"x 1.25 built in bracket (metal mounting arm) with two holes would probably work to support the alternator foot, if I provide good wide and beefy spacers for the dual foot, to prevent torque or twist from belt loads etc. But I would not want to break it off.
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Old 17-08-2019, 13:39   #11
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Re: Balmar XT-DF-170-J10 mounted on Yanmar 3YM30?

Using Gimp and dimension relationships between the existing Alt, it looks like the XT it might work.
Left side = Existing 90-65 Alternator and Right side = XT-DF-170-J10 alternator
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Attached Files
File Type: pdf Balmar 90-Series Dimension curves.pdf (406.7 KB, 1 views)
File Type: pdf XT-images-small.pdf (667.9 KB, 1 views)
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Old 17-08-2019, 13:42   #12
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Re: Balmar XT-DF-170-J10 mounted on Yanmar 3YM30?

Balmar XT-DF-170-J10

SF/DF Hole to Hole B: 6.53"
Overall Height C: 7.43"
Case Diameter D: 5.26"
Mounting Foot Bore DF: 3/8" 10mm
First Groove to Mounting H:1.28"
Front Foot thickness I: .6"
Saddle Width K: 3.14"
Rear Foot thickness L: .52"
From back of Rear Foot to tip of +Terminal J: 1.61"
Overall width first groove to back of rear foot: 1.28"+3.14"+.52"= 4.94"
Alternator RPM 2000 ---> 115amps hot, not continuous

Balmar 90-65 (Slightly derated from 90-75)

SF/DF Hole to Hole B: 6.50"
Overall Height C: 7.25"
Case Diameter D: 5.50"
Mounting Foot Bore DF: 1/2"
Center of pulley to Mounting H:1.08"
Front Foot thickness I: .6"
Saddle Width K: 3.14"
Rear Foot thickness L: .50"
From back of Rear Foot to tip of +Terminal J: less than 1.61"
Overall width center of pulley to back of rear foot: 1.08"+.60"+3.14"+.52"= 5.34"
1/2" Belt, 2.5" single pulley
P type Polarity.
Alternator RPM 2000 --> 67amp (no hot amps)

Conclusions:

Case diameter of the XT-DF-170-J10 is 0.25" less.
Overall height of the XT-DF-170-J10 is 0.18" more.
Overall width is comparable, but the + Terminal sticks out more.


From the Balmar Configuration website app
Results | Balmar
Manufacturer: Yanmar
Model: 3YM30
Engine Specification: 3 Cyl., 68 cid 1.116L Diesel
OEM Alternator: w/Hitachi 80A Alternator
Mounting: Dual Foot 3.15" (Hitachi Style)
Standard Pulley: K6 Serpentine
Amperage: 80
Voltage: 12

Without a pulley change using SV: 60-100-SV, about $688
or adding the charging kit: 60-YP-100-SV $925
With a pulley change to J10: 60-100-J10 $688
or up amps 60-150-J10 $904
or adding the charge kit: 60-YP-150-J10 $1,111

However the XT-DF-170-J10 $984 is newer and will run cooler at about the same cost
.
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Old 17-08-2019, 14:23   #13
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Re: Balmar XT-DF-170-J10 mounted on Yanmar 3YM30?

What will be needed.


1 Turn the Dual Foot 180 to use the bracket bolt holes in the lower heavy 1"x 1.25 built in bracket (metal mounting arm) with two holes, to support the alternator dual foot. Provide good wide and beefy spacers for the dual foot, to prevent torque or twist from belt loads etc.???

2. Then I will have to remove the original Yanmar DF hole bracket mounted to the side of the engine.

3.Remove the belt protection.

4. Extend the system water hose bracket to avoid the new wider belt.

5. Install a serpentine belt kit.

6. Setup belt manager to reduce output until I get new batteries and rewire.
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Old 17-08-2019, 14:58   #14
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Re: Balmar XT-DF-170-J10 mounted on Yanmar 3YM30?

Quote:
XT series alternators include a backup internal regulator for emergency use. All require a serpentine belt or dual V-belts and for full output require the MC614-H regulator because it can deliver the higher field current necessary to drive these them to full power.

But if I am going to be using Belt Manager anyway to derate the alternator by at least 30% because I have not yet changed my battery bank or wiring, wouldn't the existing ARS-5 be sufficient?
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