Over the last couple weeks, I have been shadowing the lead Volvo mechanic at LaConner Maritime Service. I have begun to expand my failure diagnostics knowledge specifically pertaining to marine Volvo equipment. I have spent most of my learning time inside the DPH drive model. I have been learning how to shim the gears properly to obtain ideal contact patterns, backlash, establish proper rolling torque and overall assembly. I also learned how to lap the clutches for stern drives in general.
The bearing on the left had spun in its housing creating excessive shaft run-out.
Calculating nessary shim thickneses
Checking gear contact patterns. This patttern is optimal.
There is excessive wear and pitting on this gear.
Lapping a DPH clutch.
Failed head gasket on a 350 mercrusier
