Trouble with Tamping Units and it's remedial action fault 5

Trouble with Tamping units.

You are on n4net and this is indian railway track machine trouble shooting with you.

This is a series of trouble shooting technique  for the track machine working in Indian Railway.  When you study  this you able to rectify a fault of machine. If this is helpful for you than share with others. It may helps them. Thanks for sharing.

Now we study about "Tamping Unit"

5) Fault :-  Machine not moving in reverese direction.

Probable causes and Remidial action.

A) No deflection on galvanometer 18G2 of programme panel switch on position-4.

Check signal Q09 - X 09. If no signal.

• Check X37 or X 38  switch and signal X37 or X38 on programme panel.
• Check input signal X23 for reverse joystick.

• Check input signal X13 and X14 indicating tamping unit is in middle or Up position. 

• Output signal Q83, indicates that machine moving in reverse direction.  

• No signal X30 indicates, auto  working switch is off.  

• Check out put signal Q42.  If Q42 is OK, check relay 18U1(C)   (EL.T.277). Replace defective relay. 
• Check relay QL37 (EL.T.7002.S4) behind B7 panel.  Replace defective relay. 

If all the above conditions are OK, replace PCB EK319.