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Salop Farmer · May 8th, 2021, 15:41

Having got to a rear axle refurbishment on my 544 restoration I noticed the rear drums were a bit scored. Having discovered how expensive these are to replace I thought I would skim them out on a lathe. Well they cleaned up after machining about 0.020” out of the diameter. There is absolutely no information in any of the Volvo manuals I have regarding the maximum diameter the drum can be (either through wear or machining). But having spoken to Amazon Cars,Rob uses a gauge to check the diameter, which measures 230mm (9.055”). If the gauge goes in the drum he scraps it. I am wondering if machining the drum bore to no more than 9.030”diameter is in order. Does anybody know please?

May 8th, 2021, 15:41	#1
Salop Farmer Member Last Online: Today 13:44 Join Date: Feb 2019 Location: Oswestry	Volvo Amazon and PV Brake Drums Having got to a rear axle refurbishment on my 544 restoration I noticed the rear drums were a bit scored. Having discovered how expensive these are to replace I thought I would skim them out on a lathe. Well they cleaned up after machining about 0.020” out of the diameter. There is absolutely no information in any of the Volvo manuals I have regarding the maximum diameter the drum can be (either through wear or machining). But having spoken to Amazon Cars,Rob uses a gauge to check the diameter, which measures 230mm (9.055”). If the gauge goes in the drum he scraps it. I am wondering if machining the drum bore to no more than 9.030”diameter is in order. Does anybody know please?