#650 Deluxe Suction Box Kit
There are a few reasons for installing this suction pump. Short of complete rebuilding of the player action, it may be expedient to defer this eventuality. It may be easy to foot-pump, but there are times when you may want to be away from the piano for a moment. Children or old people sometimes have difficulty foot-pumping, whereas you don't.
Whatever the reason, the installation of this kit need not destroy original operation or prevent going back to the way it was. There is an internal check valve built into the suction box, which is like a one-way valve. The vacuum motor can draw air from the player action, but the connection of the suction box does not allow passage through it when the foot-pumps are operated. The space required for the pump is 8" x 8" x 10" tall.
The vacuum motor used is somewhat similar to the type that would be found in a vacuum-cleaner. Since the vacuum necessary to operate a player piano is usually far less than needed to sweep the floor, an electronic resistance control is used, so that only the actual suction level needed will be produced. Two levels of vacuum are an important feature of the control unit used on this suction box. During re-roll the demand for vacuum is only about one-third as great. The pneumatic motor and controlling governor were not originally designed to regulate an excessive amount of vacuum which would be the case with little being consumed, but still pumping at the same rate. With foot pumping the pumping strokes are at a slower pace. The electric motor needs to be told to slow down, and this is why there are two speed circuits, with the selector switch (Fig. 2) which automatically switches to a permanent pre-set running speed any time the gear shift is in re-roll position. This is accomplished by simply tying the string to the moveable part of the Play/Re-roll linkage. The selector switch temporarily throws in the extra resistance which has been set up through the potentiometer on the control panel (the post without the knob)
The main thing for you, the installer of this kit, to figure out is: where to drill a one Inch hole in the tower pump assembly to properly add the flanged fitting to connect the 1-1/4" hose from the suction box. There were two basic types of construction (shown in Fig. 4 and 5)
Ignore the two original foot-pump bellows. These have internal check valves that disconnect each from the vacuum system. The reduced vacuum cavity is connected to the trunk channel and the reservoirs. Only one reservoir is needed, but most pump assemblies have two. If only one, it is usually across the top of the two foot pumps (as in Fig. 5). In this case it also serves as a connecting channel. You would want to drill the one inch hole into the stationary part of the reservoir. This is easily done without removing the pump assembly from the bottom of the piano if construction is as in Fig. 4. Usually the reservoir in Fig. 5 has the moveable leaf facing forward, and it is necessary to completely remove the assembly from the piano in order to drill the entry hole and affix the flanged fitting from the back side. In fact, due to differing construction techniques by various manufacturers, it is almost always safest to mount the supply flange on the back of the reservoir such that the flange will not contact the plate or soundboard when the reservoir is full open.
If the bellows assembly is built like Fig. 4, but so large that there is not room for the box, remove the left reservoir. Remove screws and break the glued stationary board of the reservoir from the trunk channel, and patch the hole that is left. Drill a new one inch hole adjacent to this to mount the flanged hose fitting so it is pointed down, directly over where the suction box will be.
Normally the pedal rods go along the floor of the piano on the left side. To overcome this, saw several scrap blocks of wood to prop up the bottom of the suction box to clear these. A small bottle of linoleum paste and a stick to smear it with is enclosed in this kit; this is for sticking the padding on the bottom of the suction box to what ever will support it in position in the piano.
Installing the Selector Switch. The play/re-roll 1ever moves rods and mechanical linkage that does three things:
1. Shifts the transmission from the take-up spool to the music roll.
2. Operates the cut-off valve to the pneumatic stack.
3. Operates the valve that by-passes the motor governor.
The Selector Switch can be installed at any point on this linkage where a string can be attached between it and the Selector Switch lever. Note that the switch lever must be pulled to the left when the play/re-roll lever is in the Play position, and released when it is in the Re-roll position. (Under the key bed or by the transmission usually works best.)
A convenient location for this switch is by the air motor at the right of the transmission. With the transmission in the Play position, tie the string to the bottom of the shift lever (in most cases) so that it pulls the Selector Switch lever fully to the left.
The electric cord to this switch is long enough to reach from the lower part of the piano to this location, around the right end of the pneumatic stack. Extra wire can be coiled up and stowed. A connecting plug is provided so the switch can remain in position when the upper action is removed for servicing or tuning.
Mounting the control panel (shown in Fig. 1) Fig. 6. shows complete installing of the wiring. The twin-speed electronic control is mounted on the bottom of the key bed and to the side, so that it will be out of the way for foot pumping. The on-off switch and playing power knob can easily be operated even though it is out of sight. The power cord to the wall receptacle is brought out the back of the piano, behind the suction box by drilling a hole through the soundboard. This will have no effect on the sound of the piano.
It is a good idea after installation to place a cloth strainer over the fitting on the suction box and slip the hose over it to catch sawdust of shavings that might come through during the first several minutes of running. Air is drawn directly through the motor to cool it, and dirt should not be allowed to enter.
Avoid running the suction box with the Intake closed for more than a few minutes as it might be damaged from overheating. Under normal usage, enough air passes through the motor to cool it. Even though the exhaust air is hot, the fact that you can feel the air shows that it is passing through.
General Information: If you have problems, send an email to ‘John A Tuttle’, or phone (732) 840-8787, or write Player-Care, 407 19th Ave., Brick, NJ, 08724. You will probably never need replacement parts or repair, but if you do, contact me.
If you need extra 1-1/4" vacuum hose to connect to a top Installation, the stock no. is 551. This sells by the running foot and is available from Player-Care or could be obtained from your local vacuum-cleaner repair shop. In a very few cases, due to the construction of the original lower pump assembly, there is no way to remove part of it to make room for the addition of the suction box in a very practical way. In this infrequent situation, it is suggested that the upper left corner of the piano case (between the lid, above the piano hammers) be cleared. Use a hinge to attach the bottom of the box flush with top of the piano side. In this manner, the suction box may have the hose disconnected and simply swung outside the piano case when the piano is tuned. For this situation, it will require an extra length of hose.
In setting the right amount of vacuum for the re-roll mode, it is suggested that you play out the longest music roll you have. Stop at the end. Turn the potentiometer post (Fig. 1.) without knob, all the way counter-clockwise, Put tempo lever at zero, shift gears to re-roll. Turn suction box back on and turn this post clockwise until the roll barely starts to move. This will permanently set the minimum when it can start re-rolling from a dead stop.
Conditions may change. Lower humidity conditions such as found in a heated home during the Winter may open up some new leaks in the player system. Especially one that has not been rebuilt and resealed. During this season the reroll circuit may have to be reset.
The #650 suction box has a lot of reserve power. Up to 50 inches of water lift vacuum.
This can overcome a lot of leaks and still be able to play loud when you want it to. There will be a varying degree of permanent leakage in the system, but once this is overcome, the additional amount of vacuum required to play from very soft to very loud, will probably vary from five to fifteen inches of vacuum.
This set of installation instructions is also shared with the #655 model suction box. The only difference is that the #655 does not have an on-off toggle switch on the control panel. Its use is intended to be with an automatic shut-off device (stock. no. 652) which mounts in the spool box and responds to the flipping tab of a roll that is fully rewound, to shut off the suction box. Therefore, it is not needed. If you later decide to add a #652 automatic shut-off with the #650 control, you should simply tape the on-off toggle switch in the "ON" position.
Should you decide to take this electrification one step further and add an automatic rewind, the stock #916 rewind pneumatic is available from Player-Care. This would allow you to hook the roll on the take-up spool, press a start switch and the rest would be automatic with the complete cycle of play, rewind, and shut-off, ready to restart at your convenience. All three components are offered together in the DELUXE AUTOMATION KIT.
The electrification of the player piano should not affect the tempo setting, but now would be a good time to check it out.
The Q-R-S 88-note test roll, stock no. 46016, is available for the same price as the standard size music roll. This also has the tempo test scaled on it. However, if you do not have one, use a ruler on one of your existing music rolls to mark a starting and ending mark seven feet apart. The graduations on the tempo indicator are 10 for each foot of travel per minute. That is, with tempo set at normal "70", it should take one minute to travel from start to end of the seven foot mark (or half minute for a 3-1/2 ft. increment. Adjustments can be made on the indicator needle by trial and error, accordingly.
There has never been a request to supply the motor brush replacements, so perhaps they just don't wear out. We do know that the slower running motor speed allowed by the electronic control greatly increases the life, as opposed to running full blast as in a vacuum-cleaner application. Regardless, there is a five-year guarantee on the vacuum pump and a one-year guarantee on all other parts. If a part or device fails, any attempt to repair it will void the guarantee. Send it to Player-Care, 407 19th Ave., Brick, NJ, 08724, or send an email to John A Tuttle - john @ player-care.com for instructions.