Mac Allister 1500W Corded SDS plus Brushed Rotary hammer drill MERH1500

i bought it last week and it work perfectly , i love it

I bought this 18 months ago .It did the work but the chisel action took time to come into action. If you held against the concrete you had to hold it for 10 seconds before it start to chisel effectively .
The fault is , I think, the lack of GREASE in the gearbox
The PROBLEM is that the instruction manual says use a suitable grease but gives no further details of what to buy. With all the different types of grease available today, this is rather useless advice
WHAT IS THE CORRECT TYPE OF GREASE?

Bought this due to forgetting branded sds at home?! Very good no problems drilling through engineering brick, concrete etc. Chisel attachment v good
This drill is par to branded more expensive ones I have. Still going strong and light weight when up laddder or using for lo g periods

Had my MAC a while now best drill I have ever had, would beat more expensive drills hands down!

Bought this as I needed a lot of chasing doing and some was straight into a concrete lintel... Although slightly dubious as to its impact, it goes through stone, concrete and plaster like butter. Truly impressive and time saving tool. I highly recommend.