(Topic ID: 89927)

Baseball; Update Williams C-5161 Batter Unit Assembly with Slugfest Bat Parts.

By SteveinTexas

5 years ago

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  • 13 posts
  • 6 Pinsiders participating
  • Latest reply 2 years ago by AlexF
  • Topic is favorited by 4 Pinsiders


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There have been 10 images uploaded to this topic. (View topic image gallery).

slugfest parts Batting Unit Parts (resized).jpg
Slug Fest Batting Assembly (resized).JPG
Updated Batter Unit.JPG
New Bat Installed.JPG
Up graded Batter Unit.JPG
New Parts.JPG
Discarded Parts.JPG
orig parts.jpg

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#1 5 years ago

Back Story

Why do this? I was unable to find the C-5161-4 unit for a 1962 World Series restore. This earlier versions with modifications and coil upgrade to a H23-870 is just as good. On review of four batting units and talking with other baseball game owners it became evident that unless they were routinely lubed bat units linkage can become worn over time and not function properly.

The original C-5161 and C-5161-1 driver arm has a bat with a shaft similar to a flipper shaft and an assembly arm. This three piece arrangement (bat and shaft are two separate pieces) was replaced on the ‘Official Baseball’ C-5161-2 game with a more modern version three piece arrangement.

The early C-5161-2 more modern arrangement has a cotter pin on the shaft that allowed the bat and shaft to be fitted from the top of the playfield with a smaller hole in the playfield. This was simplified a year or so later to the final two piece arrangement (not changed since) and although not really necessary the cotter pin was nice engineering in my view.

Restoration Good News

You can replace not only the C-5161, C-5161-1 batter units but also the C-5161-2, C-5161-3 and C-5161-4 assembly, shaft and bat with current Slugfest parts purchased from Marco Specialties.

The assembly shaft may require on the C-5161, C-5161-1 and C-5161-2 batter units that the assembly frame collar that goes through the playfield be drilled out to a 3/8" diameter hole to fit the slugfest shaft.

C-5161-1 Batter Assembly Diagram with Part #'s

orig parts.jpg
What we started with shown above.

C-5161-2/4 Batter Assembly Diagram with Part #'s

a) Instructions to replace C-5161 and C-5161-1 Bat and Handle;

Slugfest Items to buy are shown below;
New Parts.JPG
1. # A-6338 Slugfest (WILLIAMS) DRIVER ARM ASSEMBLY $29.95.
2. # 02-2966 Slugfest (WILLIAMS) SHOULDER STUD ROLLER $5.65.
3. # 02-2750 Slugfest (WILLIAMS) ROLLER DRIVE ARM $2.00 (Note; currently out of stock part. Salvage the original sleeve 23A-6312 from discarded assembly arm assembly A-4689 by drilling out rivet).
4. # 20A-8798 is a ¼”-28 hex nut. (Fine thread not available at box store).
5. # 03-8516 BASEBALL BAT (see pic below) $12.50.
6. # 10-32 elastic stop nut to hold the bat on (see pic below, has a fine thread and not available at a box store).
New Bat Installed.JPG
Bat (#03-8516) installed with lock nut (#10-32 Elastic stop nut)

b) Exchanging the ‘Batter Unit’ parts

1. Remove the bat shaft A-4691 cotter pin from the assembly collar.
2. Discard the bat & shaft, and assembly arm. (See picture below).
Discarded Parts.JPG
What parts we will discard; A-4689, A-4691 and bat 23A-6323 shown above.

3. Keep the old assembly arm and salvage the original sleeve 2A-2750 by drilling out the rivet. Then discard arm.
4. Drill out the assembly frame collar with a 3/8” drill bit.
5. Fit the new Driver Assembly arm.
6. Fit the new shoulder stud roller, salvaged sleeve and secure with a ¼”-28 hex nut.
7. Fit new bat and secure with a #10-32 elastic stop nut.

Up graded Batter Unit.JPG
Upgraded Batter Unit

Updated Batter Unit.JPG
Batter Unit opens switch after bat action

#3 5 years ago

No I have only the bat shown in the discarded picture in the original thread.

Per the books on the planetary pinball site the bat I refer to above is only one shown. The earliest book is for the 52-60 time period but is not inclusive by far. The link is attached.


I have not looked for the rubbers, seem easy to make though. It a quite soft rubber.

Steve J

4 months later
#4 5 years ago

Do you mean the bat shown in post 1? If you do you can have it. Pm me were to mail.

2 years later
#6 2 years ago
Quoted from KenLayton:

What's the number of the replacement switch and spring for your "upgraded" bat unit?
I found the rubber bumper at Marco as Williams # 23-6312 (just $1.99 for it).

Don't think there are replacements for the switch

I make the switch from PBR parts and the spring is a #10-431 from Marco and in stock.

1 week later
#8 2 years ago
Quoted from KenLayton:

What's the number of the replacement switch and spring for your "upgraded" bat unit?
I found the rubber bumper at Marco as Williams # 23-6312 (just $1.99 for it).

7-22 Update; Finally back in-country and had time to research what Ken asked for. The spring is in stock at Marco 10-431 and no need to make one. The slugfest has no switch so that you easily make from parts from PBR or equivalent.

The current replacement parts that Marco Specialties have in stock for the Slugfest batting unit that are universal with all earlier assemblies since the late 50's are as highlighted below.
Slug Fest Batting Assembly (resized).JPG
I have attached the Slugfest parts list from the manual for part # confirmation.
slugfest parts Batting Unit Parts (resized).jpg
Hope this helps.

#9 2 years ago

Reserved for updating

#11 2 years ago

Marco Specialities have been out of stock for over a year. I heard they were not planning to make them. I have been asked about it a lot and all my spares are gone now.

Only guy that has the skills and inclination is Scott Webb (G43crazy) How about it Scott?

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