TC reported train jerked when departingCTH NB and SOM NB. Train departed in ATPM at NEW1 and inform ed train jerked when train reached 30kph. ~~~~~ To Continue Rectification.  657/658 checked/found #1658 A1 CCD weak-link was broken & CCD shoe was missing. Found the following locations with CCD height out of criteria : #1658 - B1, B2 #2658 - B2 #2657 - A2 #1657 - A1 #3657 - A2, B1 Replaced #1658 A1 CCD unit & re-adjusted all of the above-mentioned CCD height to criteria. Depot shunting, no power fault or train jerky was found.  Lee PT/Shafie 44341 3658 TC reported train jerked when departing CTH NB and SOM NB. Train departed in ATPM at NEW1 and informed train jerked when train reached 30kph.  657/658 ER D/L & found no FC registered. No abnormalities found in line voltage & brakes. Performed brake cyclic test & brake pressure  - OK. OPS 20 raised to check on CCD shoes & height.  Jervis 44341