This is an Original Thermo King part for type Unit:
KD-II
KD-II MAX met TK3'6'6 Engine
KD-II SR met TK3'7'4
MD-II & MD-II MAX             
MD-II MAX met TK3'7'4 Engine  
PGM MAX & PGM-II MAX          
ThermoKing Part Description:
KIT - idler bracket
Thermo-King no. 90-0142
Old numbers: 
55-5968/4508B95H02
99-9453/7335C37H01
Description on Article: 
Thermo King
90-142
Kit contains:
1x 91-723 Bracket Pulley Idler
1x 55-5597 Screw HH 1/2-13
1x 55-5871 Washer Special
Description on packing: 
Thermo King
90-142
Kit
Examples and applications or 
Names and unit codes: 
TK90-142 / TK-90142 / TK.90.142 / TK90142 / TK90-142TKA / TK-90142TKA / TK.90.142TKA / TK90142TKA
TK90-0142 / TK-900142 / TK.90.0142 / TK900142 / TK90-0142TKA / TK-900142TKA / TK.90.0142TKA / TK900142TKA
TK55-5968 / TK-555968 / TK.55.5968 / TK555968 / TK55-5968TKA / TK-555968TKA / TK.55.5968TKA / TK555968TKA
TK99-9453 / TK-999453 / TK.99.9453 / TK999453 / TK99-9453TKA / TK-999453TKA / TK.99.9453TKA / TK999453TKA
MDII / MD II / MDIIMAX / MD II MAX / MD-II-MAX                                                                                                              
KDIISR
KD-IISR
KDII / KD II / KD2 / KD 2 / KD-2
KDIIMAX / KD II MAX / KD-II-MAX / KD2MAX / KD 2 MAX / KD-2-MAX
PGMMAX / PGMIIMAX / PGM II MAX / PGM-II-MAX / PGM2MAX / PGM 2 MAX / PGM-2-MAX                                                                               
KD II SR
MDIIMAX / MD II MAX / MD-II-MAX / MD2MAX / MD 2 MAX / MD-2-MAX                                                                                              
Idler Assy Pully / Support-bracket / bracket- support / bracket support / Support / support bracket / hook /