HDK-MT350_EN_06
53
Replacing pilot control unit Y1/Y2 of inlet valves V1/V2
► Depressurise the dryer and shut it down (see page 35).
► Undo the nut (173) of solenoid mounting.
► Remove solenoid (170).
► Release end sleeve (116).
► Completely remove end sleeve with
solenoid armature (127).
► Remove valve seat (108).
The pilot control unit Y1/Y2 has been
disassembled.
Proceed as follows to install a new pilot control
unit Y1/Y2:
► Replace O-ring (110) on end sleeve and
install.
► Lightly grease thread of end sleeve (116).
► Fit washer (134) in end sleeve (116).
Pilot control unit Y1, Y2
► Fit compression spring (132), pin (133),
solenoid armature (127) and pin (128) on
special tool (Item 5).
► Slide on end sleeve.
Important!
The pilot control unit is correctly installed
when the end sleeve can be pushed down to
the base of the gauge!
Tip:
Slide the end sleeve into the solenoid and
energise the solenoid via rectifier connector
(observe voltage supply!).
► Screw end sleeve (116) into the mounting
hole.
► Remove solenoid.
► Tighten end sleeve (116) (tightening torque
100 Nm).
Valve armature gauge
► Fit solenoid seal (169, 171).
► Fit solenoid onto end sleeve (116).
► Grease thread and screw on nut (173) (tightening torque 15 Nm).
► Check that all screw connections are tight.
► If no other maintenance work is to be carried out: Restart the dryer (see
page 36).
