Bally 903d weak reel spin

[SPN]

My 903d works great and the handle feels very good when I pull it, but reel 1 only spin around one turn and a bit longer when the clock assy has stopped..
Everything have been taking apart and cleaned and I don’t understand what makes it spin that weak..

My other machines runs pretty smooth and I tried to check if I could see any differences but so far I can’t..

It kind of feels like it slips just too early when I pull the handle but it doesn’t or?

 

[wolftalk]

the reel spins slowly or it latches in place too quickly?

if you grab and hold the clock fan when the reels have kicked, are all three reels spinning about the same rate or is reel 1 a lot slower?

[SPN]

Yes it spins slowly but at the same time the handle pull feels ok

I just sent you a video to look at

 

[wolftalk]

I put the video at https://bingo.cdyn.com/slots/903-D/pics/903-D_reel_spin.m4v for other people to look at.

if you grab the fan, you'll be able to tell if the problem is a weak kick or if the latch links are latching the reels too fast.

it looks like the game is kicking ok and the variator cam on the timer link driving the clock is changing the spin duration like it should.

the latch links under the reels probably have four holes in the front end.  (items 23 and 12 in the below pic).  The reel 1 link should be in the second hole from the front, reel 2 in the 3rd hole and reel 3 in the 4th hole.

if reel 1 is in the first hole, the latch link will be too long and reel 1 will index too fast.
 

[SPN]

I checked the latch links and they all looked good, and they are all in the right holes.

As you can see in the picture the drive lever assy is not wind up as much as it should on the 903 as on the 1039 when the trip lever assy is in the same position..

The 903 is 14,5 cm from front plate and the 1039 is 14 cm from the front plate so it’s a bit different and that’s the only difference I can see so far..

I don’t know how to adjust the differences since all my other games seems to have the same measure as the 1039 game..

[DavidLee]

Make sure the reels shaft is set and properly locked in position.

Check the adjustment on the trip pawl “L” trip lever, bottom right rear of the reels chassis.

[DavidLee]

Also, check springs noted in photo.

[wolftalk]

hi david,

another video to check out:

https://bingo.cdyn.com/slots/903-D/pics/903-D_drive.m4v

I asked for pics of the right side of the reel mech to see if something looks wrong and possibly causing the main shaft to not rotate fully counter-clockwise.  I guess pics of the left side would be good too.

[DavidLee]

Luckily there’s another reel assembly to compare with.
Close inspection could reveal a part out of adjustment.

Also, latch hold mechanism could be interfering with the index arm / kicker assembly.

[SPN]

Here’s a picture from the left side and as far as I can see it looks good, but maybe I miss something?

All the springs are there and they are also matching so that’s also not the reason..

[wolftalk]

got pictures of the right side of the reel mech?

looks like you are missing the racthet pawl (67 below).  Without that, the ratchet (61) never spins and the ratchet link could be in a position to make the spin as short as possible.

try spinning the ratchet so the link is as long as possible.

hopefully I don't have that backwards ... you can also make the link as short as possible and compare the spin lengths.

[SPN]

I removed the ratchet pawl intentionally and adjusted it for the longest spin, and I don’t think that’s the problem either.

I’m sending you a couple of videos to see the difference between the two reel mechanism and maybe that helps..

[DavidLee]

Have you tried adjusting the trip lever L bracket?

Also, are both fan blades configured the same and or the same size?
Swapping fans would eliminate the fan and possibly the clock speed.
A fast clock will stop the reels sooner.

    >Caution the clock fan shaft is very delicate.<

Reel assembly Part # 24 the latch pawl assembly is important when tripping the index arms.
Compare it to the other machine for correct placement and alignment.

[wolftalk]

another video from SPN from a kinda unique perspective:

https://bingo.cdyn.com/slots/903-D/pics/903-D_reel_kick.m4v

I'd still like to see a video of the reel kick/spin with the clock fan grabbed so the reels don't latch.

SPN's issue is he thinks the kick for reel 1 is too weak, and preventing the reels from latching will assess how fast it's spinning relative to the others.  You can also spin the reels by hand and compare resistance.

the only adjust I can think of that could affect the kick strength is the bracket on the bottom/back of the right side reel mech.  If you move the bracket a little left, the game will wind up more before it kicks off.  However, move it too far and the handle will bottom out before the kick and get stuck.

your bracket position is reasonable since the reel 1 wiper arm is latching.

so I guess the first question to answer is whether the issue is the kick is too weak or reel 1 is latching too fast.

if the conclusion is a weak kick, check part 34 on the diagram in post #3 and see if the roll pin has worn and the piece is loose on the shaft.

SPN also is wondering if the drive levers (part 28) aren't rotating forward enough.  Afaik, the roller at the top should just clear the slotted index disc when the reels are not in windup.   I think the drive levers are different for 20/22/25 stop games, so if comparing the geometry make sure you're looking at games with the same number of stops.

oh, and also check the roller on the top of the drive lever spins easily on the pin it's mounted on.

[DavidLee]

Nice video, it appears everything is work okay.
Just a weak kick or index tripping to early.
Machine looks super clean, but could be some sort of obstruction in the first reel assembly.

[SPN]

I found out that there’s a length difference on the drive lever assy on the 1039 and the 903 and maybe that can be the reason for the weaker spin?

The 1039 Las Vegas has drive lever assy number 22-10 R And the 903d mustang has drive lever assy number 22-10
It’s around 4 mm difference between those two and I wonder if the 22-10 is wrong, or shouldn’t that effect the problem

As you can see I compare with a similar machine..


I have several extra but they have other numbers on them, what those the numbers means?

[wolftalk]

when you held the clock fan reel 1 spin was longer than reel 2.   If that's consistent, then the kick strength is not the problem.

if you hold the clock fan for a couple seconds after each kick, do you get the spin behavior you want?  If yes, the issue is why the reels are latching too fast.  You'd want to be comparing the stuff on the left side of the reel mech between the 1039 and 903 like the position of the linkages, the main shaft position, and the behavior of the clock - especially how it controls the latch shaft.

for example, someone a few months ago had a worn roll pin in a shaft that allowed the latch shaft to change positions before the clock slowed it down ... kinda like your video of the main shaft.  The effect was the reels latching sooner than they should.

[ironmaster]

Hi All, I replaced my E1000 hopper board and now it does not blow fuses but my display just shows 6. It was showing 50.000 now it's just 6. Any ideas?

[SPN]

Even if I try different stuff It still feels like it slips to early if you know what I mean? And as you can see the drive lever assy are always in the wrong resting position comparing to all my other games, are you agree that they are in wrong position ?

I changed the roll pin and it looks more tight now so that can’t be it, and I tried to see the other roll pins and they all look good too.

Do you know if there are different of the two drive lever assy that I use?

[Amechanic]

The code 6 is from one of two things. First is bad 5101 ram chip or chips. If you have the 1000 series MPU board, these are located on the small ram board. If your running a E2000 MPU, they are located near the battery. I’d check the sockets for acid damage. I’ve seen many where the metal clips corrode and turn green. The chip sockets Bally used on these boards are garbage.