Second hand find Hitachi Trk-9150e

[SwedishHiphop]

Hi

Recently found a Trk-9150e for a very low price at a second hand store. Everything except the casette deck and bulbs was working. I ordered replacements belts on eBay from DeckTech. Ive now cleaned all old funk and replaced the belts, but the motor cant barely spin when attached to the mechanics. The mechanics itself without the big belt spins just fine and is cleaned and lubed. And the motor also spins fine with the belt not attached. Do anyone know if decktech is good quality or could the belts be to tight? The motor be worn out?

Would really appreciate some help.

Sorry if my english isnt the best. Im a swede

 

[Superduper]

Never heard of decktech. Also without actually inspecting myself, it's hard to comment on what could be the issue. You should ensure that the belt routing is correct, and also you should check rotational force required to spin the assembly where the belt normally attaches to. If the motor is worn out, it usually makes lots of noise. You can check to see if the motor has decent torque by feeling the pulley and see. That's not a scientific method but if the motor is totally worn out, it will probably stop with the slightest load, and probably will squeak and the shaft feel loose. Or. The motor itself may need it's speed adjusted, especially if the belt is too tight. If you are sure that nothing else is wrong, you can try to increase the motor speed by adjusting the speed control. Look at the back of the motor. If there is a small rubber shrouded hole, you may be able to insert a tiny jewelers flat screwdriver and adjust it. However, be careful with that adjustment, the tiny pot is not designed for lots of motion, and it breaks easily. Also you may wish to measure the voltage to the motor to ensure that the circuit itself is supply enough power to the motor. Some motors run through fusible resistors that have changed values.

 

[SwedishHiphop]

Big Thank you for the answer.
Belt routing is correct.
Rotational force to spin the system is nearly nothing.
Hard to explain but if i pinch the motor very slightly between my fingers it spins but sky harder Will stop it, i have nothing to compare to. Will do the other checks and we will see. DeckTech will send med larger belts to, so Will try that also.

Would also appreciate if someone have replacement led recomendation instead of the original bulbs? Original part no: 5762281.

Thank you again!

 

[Superduper]

That sounds pretty normal to me. These tiny motors are not very high torque so for sure you can stop the motor by pinching it hard enough. If the force needed to rotate the capstan is almost nothing, and the motor does spin by supplying some pinch force, it should certainly be enough to spin the capstan, even if not very fast. You should see if the belt is actually slipping. Sometimes, it motor spins but the belt slips making it seem like it's not spinning. Also another possibility is that the belt is too tight, or you have the wrong belt affixed to it. If so, you can exert too much side load which on a worn motor, could cause it to bind. How tight is the new belt? Does it require significant stretch to loop it over the pulley? The new belt should be only about 10% shorter than the actual belt path.

Also the motor has a pretty sizable capacitor across it, if it’s leaky or shorted, that might potentially siphon power from it. You may want to check or replace it. Or you can replace the motor with a generic one if you are sure that everything else is correct. Getting new OEM motors is almost impossible now but generic chinese ones are available for very cheap. Unfortunately, the quality, reliability and performance of those is often quite poor. If it's coming from China, has chinese name, it's almost surely a copy/clone.

 

[SwedishHiphop]

The regulator outputs about 16v and the motor gets about 15v when running. From what i could find thats okey?
From what you guys said and from what i tested my best guess is that the belt is too tight. So will wait for the new belts they sent me and try that first.
Ive found a candidate for a new motor if needed later Hitachi/Mitsumi 5576361/91122-A. Seems right with the little knowledge that i have.

Really appreciate your help guys!