Documents can be found with lubricant product kit sold by Dual years gone past. The combination of lubricants in this kit was primarily beneficial for idler wheel driven models. However, most the auto-mechanisms of belt driven and direct driven models also utilized a similar cog and mechanism for auto-functions. Thus the lubricants are somewhat universal to all models but best to verify with the service manual for your specific model. Check out our kit of modern equivalents to this set offered by Dual in years gone past.
The original service manuals included a diagram and key for application points of the various lubricants. Image above is from a Dual 1229 Service Manual (Left) and a color coded key (right) provided in our lube kits. See descriptions bellow of individual original lubricants and modern equivalents provided in the Dual Turntable Lube shop.
This brown grease is what Dual engineers recommended as having the superior attributes to keep Dual auto-functions running smoothly and preventing wear on mechanical parts.
Originally called "Alvania" it was renamed as "Gadus" several years ago.
This is the main lubricant used but requires only a very thin film and applying too much may actually prevent proper operation.
Only bad thing about this stuff is that when it collects dust over 40 years it turns into glue. If you find a Dual in the wild, it will need cleaned by removing old grease with 90% isopropyl and q-tips prior to applying fresh grease.
Black Graphite Grease. This stuff is a bit, well, messy to work with.
Not much is needed, and in many cases can be replaced with Alvania. There are a few spots, particularly with the older 1019 and other 10xx units that high friction metal parts are still recommended to be lubed with this stuff.
Do NOT use on the cam wheel. Ignore if the Dual service manual suggest there or other plastic parts.
This also is in the service manuals for several of the direct drive turntables. I personally don't know if it is needed however, because I don't have one yet (let me know if you have one to sell!).
The Isoflex PDP 40 is a lightweight machine oil for the sintered bushing/rotor within motors on the Dual idler & belt drive tables.
Isoflex is no longer available, but Dual experts have said any light synthetic machine oil is okay. In sourcing a modern equivalent I settled on the SuperLube product that is pictured above. This is the SuperLube Lightweight Machine Oil ISO 22.
If you look at the spec sheets in the subsequent pictures you can see that the physical attributes at various temperatures is nearly identical to the original Isoflex.
Our *Deluxe* kits and motor rehab kits also include machine screws to reassemble the oil well that the sintered bushings are housed in the motor. Go read the Dual Motor Servicing guide by Dualcan if you don't know what we're talking about.
Renotac is either no longer available or only in huge drums. The wisdom on the forums is that auto motor oil will work okay, but a better substitute is an adhesive oil such as any quality bar and chain oil. The adhesive quality is needed to keep the shaft of the platter coated in oil and smooth.
This is only needed for the platter bearings and shaft. If the bearing is completely cleaned it takes a couple ml's to replace and lube the shaft where the platter rests on the bearings. Be sure to drain any excess oil from the cup prior to reinstalation.
Husqvarna seemed a reputable quality brand so that is what is in our kit. Easy to source this one, however we provide in the kit in a prefilled syringe with long blunt needle for easy application and no mess.
There are many viscosities of silicone grease out there. The ideal viscosity for dampening in a turntable tonearm is somewhere between 300,000 cst. and 600,000 cst. depending on the weight.
The Dual arms being lighter often call for 300,000 cst in the service manuals, but it really comes down to personal preference. Thus all our kits come with both the 300,000 and 500,000 cst. silicone. A slower drop gives you time to get to your seat before the needle touches the record.
Some Dual models have dampening separate for the manual and auto functions and other models they utilize the single piston for both manual and auto.
We are working on getting very small portion of 100,000 cst. silicone where 1 drop is recommended by Klaus on the underside of the cam where the start/stop trigger plate mechanism is located.
Most of the piviot points were brass movements occur call for a drop of 10W40 or 10W30 motor oil. There isn't anything special about the Super visco-static oil from BP and it in fact wasn't a very popular motor oil from what you can find online now.
Obviously you can find this lubricant literally anywhere, and 10W30 vs. 10W40 makes no difference as the operating temperature of a turntable is never hot or cold enough to make the distinction important.
Our kit includes a quality full synthetic 10W40 motor oil. Like all the other lubricants in our kits, we provide in a labeled, prefilled, and easy to apply syringe with the included 1.5" blunt tip needle.