4-stroke MSE pistons reconditioning is very attractive and cost effective as well. Reneko AS provides the following pistons reconditioning services:
- Monoblock alluminuim pistons, without Alphine inserts
- Composite pistons: forged steel piston crown + alluminium skirt
- Composite pistons: forged steel piston crown + cast iron skirt
Monoblock alluminuim pistons weared grooves are reconditioned using special welding process as per strict Class-approved WPS.
4 stroke piston crowns reconditioning process includes:
- cleaning
- inspection and measurement with parameters recording
- grooves reconditioning (if required)
- fire side reconditioning (if required)
- seatings service machining
- threads checking and refreshing.
Composite pistons reconditioning includes:
- Dismantling of the piston crown
- Checking critical parameters on both parts
- Reconditioning of piston crown following a Class approved procedure, grooves plating up to 1000 HV layer.
- Reconditioning of the alluminium piston skirt, if required. Reconditioning is going following strict Class-approved WPS.
- Service machining of the seatings on the both parts. Alluminium skirts belongs to special machining of the seating cone.
- Assembling with right expansion gap assuring, critical parameters checking and recording.
Reconditioning of Wärtsilä Mahle pistons
Mahle type pistons reconditioning process includes cast iron piston skirt seatings re-chroming to original size with expansion gap assuring.
Reconditioning of Wärtsilä KS pistons
KS piston crowns reconditioning process is shown below (before and after)
