Question about Grease !

[Dima]

Is it kind of "must be used " grease ? ( ideal ) or i may use other ( lets say local ) grease . This for parts inside of engine , right ?

 

[fritz katzenjammer]

Synthetic means they can charge too much for it but it won’t degrade any plastic components within the assembly, which a petroleum based lubricant might do.

low temperature means it otherwise nothing special.

you could likely get away with a silicone based grease but why not use the recommended stuff, they specified it for a reason.

 

[RunForTheHills]

I think low temperature refers to the temperature range that the grease is designed to have the appropriate viscosity at. It probably breaks down and is not effective at higher temperatures. There is also dielectric grease that is designed to be non-conductive around electrical components.

 

[Dima]

I think low temperature refers to the temperature range that the grease is designed to have the appropriate viscosity at. It probably breaks down and is not effective at higher temperatures. There is also dielectric grease that is designed to be non-conductive around electrical components.

so it may be bad idea to use it when +30 , 50 С?

 

[RunForTheHills]

No, your motor should shutdown before it gets so hot that it could damage the motor (or the grease).

 

[Marcela]

Anybody know what this stuff looks like? I opened a Hentech motor and it had some clear silicone looking grease with what looked like graphite mixed in. Wonder if it the Bosch stuff.

 

[PedalUma]

This is the stuff to use. It is synthetic high temp silicone that works at low temp also.

 

[Gionnirocket]

This is the stuff to use. It is synthetic high temp silicone that works at low temp also.
View attachment 203517

That's hysterical

No where near the correct viscosity/properties to lubricate gears

 

[Gionnirocket]

Is it kind of "must be used " grease ? ( ideal ) or i may use other ( lets say local ) grease . This for parts inside of engine , right ?View attachment 203504

You're better off sticking with manufacturer recommendations. They often take into consideration things such as plastics that may be affected.
On the Bafangs motors many use Mobil SCH100.. a high quality NLGI 2 synthetic grease suitable for electric motors as there is no manufacturer recommendation.
Also used is John Deere Cornhead grease which is a gear grease but that requires some caution as it's thixotropic (thins to oil like viscosity under mechanical pressure)

 

[DaveMatthews]

 

[Dima]

So this grease for the plastic parts ( but i have not found grease for the motor shafts in stores , i mean original bosh ) What do you use ? ( or maybe know original )

 

[fritz katzenjammer]

This is the stuff to use. It is synthetic high temp silicone that works at low temp also.
View attachment 203517

That’s not a good idea at all. That’s for slow moving, sliding parts at elevated temperatures.

its not for rotating parts like bearing or parts that shear their lubricants like gears.

 

[fritz katzenjammer]

The tube shows it to be a low temperature synthetic grease.

it has to work at low temperatures, high temperature grease may be way too thick at the temperatures your motor operates at.

its synthetic, likely to keep it from ruining your polymer gear train or causing the seals to swell and distort.

some qualified engineer carefully selected this lubricant to do the job that badly needs doing. Without the knowledge that he possesses regarding gear loading, materiel compatibility and operating temperatures how can we second guess him?

I spent a lot of years doing this kind of work in the automotive industry and have been constantly amazed at the amount of damage people do to their equipment using incorrect chemicals because they think they know better than the people that designed the equipment to begin with.

yes, I’ve seen some horrific screw ups by the factory resulting in long runs of failing product but as a rule shouldn’t we trust what they tell us and use the recommended fluids?



by the way… those engines? I told them that cam chain tensioner was a bad design, but they wouldn’t listen.