Remove old bolts, shearing retaining pins in the process

Machine the nozzle chamber surface

Lap the new nozzle blocks to the nozzle chamber surface

Blue check must be virtually perfect

Bolt in new nozzle blocks to specified torque

Pin the bolt heads with stainless dowels

Once the nozzle blocks are lapped and bolted up, it is necessary to drill the head of each bolt and pin it to the nozzle chamber with a stainless dowel

Lapping the nozzle blocks is a laborious job if done by hand. Uintah Machine built a machine to oscillate the nozzle block during the lapping process

Contact between the new nozzle block and the nozzle chamber must blue-check at virtually 100%

Nozzle Block Replacement

Project Highlights

Nozzle Blocks Photos

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