OutdoorKing Repair Forum Forums Repairs and Maintenance Questions on Walk Behind Lawn Mower Frames Four Stroke Lawn Mower Frames Morrison Rapier 710 advice

I've just bought a Morrison Rapier 710 walk behind slasher. Someone has put oil in the gearbox, and the Peerless gearbox manual I've downloaded from the interweb says it should be packed with 375mL of bentonite grease, which I've found is difficult to get.

Is there another grease that's easier to get and which has equivalent specs, say Moly grease?

Also, Morrison in NZ don't have a manual they can e-mail me. How do I find out if the forum Manuals page has one - or do I have to subscribe first.

Morro, bentonite refers to the matrix of the grease, which holds the oil that is the lubricating part of the grease. Matrices are either clay or soap, and bentonite is a type of clay. You can find a discussion of the problem, and a proposed solution, here:
https://www.outdoorking-forum.com.au/forum/u...31&Words=bentonite&Search=true#Post18748

Essentially, you can adhere rather closely to the manufacturer's recommendations by using Castrol HTB grease (a common bentonite-based wheelbearing grease, available in Australia.) You could get reasonable results with a common soap-based grease such as automotive chassis greases but they do not follow the transmission manufacturer's intent, so it is less adventurous to use a bentonite grease such as HTB. Also, because clay and soap greases are mutually incompatible, switching to a soap-based grease would require that you strip the transmission and clean it properly before refilling with the new grease.

Thanks Grumpy - exactly what I needed to know. Don't know why someone would have filled the gearbox with oil, but I'll get that out and clean up with petrol, and my local mower shop can get me the bearing bushes I need from Bynorm who seem to still have parts available.

I can't find anything in the parts and manuals section referring to Morrison.

If possible, please post a picture or two of the slasher, Morro, perhaps showing the gearbox rebushing job as well as the machine itself.