WinGD RT-flex50DF, Maintenance Manual, Page: 155 / 586

Maintenance
2140 − 1/A1
Winterthur Gas & Diesel Ltd.
9/ 14
7.2 Manual Check − Free Movement
Note: Do not use oil when you do step 1 ) and step 2 )
1) Make sure that the valve spindle and valve guide move freely as follows:
a) Remove the oil from the running surface of valve spindle and valve guide.
b) Make sure that the spindle is clean and dry.
c) Carefully put the valve spindle into the valve guide.
d) Move the valve spindle in the valve guide. Make sure that the valve spindle
moves freely.
e) Put the valve guide and valve spindle in the vertical position.
f)
Make sure that the valve spindle moves down freely.
2) Make sure that the servo piston moves freely in its housing.
7.3 Valve Seat − Leakage Check
1) Connect a pressurized air supply to the pressure reducing valve (94214B).
2) Connect the pressure reducing valve (94214B) to the valve guide.
3) Set a low pressure setting on the pressure reducing valve (94214B).
4) Apply a water and liquid soap mixture to the valve seat.
5) Make sure that there are no bubbles.
6) If necessary, lap the valve seat.
Gas Admission Valve: Removal, Disassemble, Assemble, Checks, Installation
2016