Technical examination WP B 700 divider

Dividing chamber in fairly good condition.
Some mechanical parts needs to be replaced.
Machine needs some good cleaning.
all electric parts need to be checked.
Dough divider 2-pocket
year of build 2007
weight range 400 - 2400 gr.
capacity 1000-3000 pcs/h.
digital touch screen control panel
flour duster with independent drive
dividing unit Ni-Resist with automatic oiling with 6 fixed and 14 adjustable metering valves
oiling on conveyor
discharge conveyor 500 mm., with quick-lock system, scraper and catch tray
separate drive on in- and outside conveyor with drum motors incl. frequency inverter
pneumatic discharge flap with plastic scraper
hopper stainless steel, inside Teflon coated, 70 ltr.
hopper base Teflon coated
frequency inverter for variable speed
discharge flap and positioning roller controlled from touch screen
main piston Ni-Resist
automatic switch of in case of no oil
measuring pistons bronze
knife hardened steel
cover plates, stainless steel, brushed, with Schmersal safety switches
frame: steel, nickel coated
crankshaft and drive rods cast iron, nickel coated
pictures BEFORE reconditioning

[@neonegar]

Hi,
1:42 main piston have some white material. What is that material. Can you know?