2205B0JE-DA-J-N_2014.05.  
5 Maintenance and Inspection 
Screw Compressor J-series  5.4 Disassembly and Assembly of the Compressor 
5-50 
5.4.15 Suction Cover 
 170J 
 
 
Order  Description 
Part 
No.
Order Description 
Part 
No.
1 
Inner cover assembly, balance 
piston cover 
— 7 Balance piston  30
2  Inner cover, balance piston cover  734 8  Sleeve, balance piston  33
3 O-ring (G115)  23 9 O-ring (G90) 35-1
4  Spring pin (6 dia.×12)  34-1 10  Housing, balance piston 36
5  Spring pin (3 dia.×10) 34-2 11 O-ring (G115)  35-2
6  Retaining ring C type external (S40) 32 12  Retaining ring C type internal (H120) 37
1.  Remove the parts in the order of the numbers shown in the figure. 
2.  Install the parts in the reverse order of removing. 
 
Note: 
According to the design modification notification as of April 9, 2012, J series balance piston related 
parts have been changed including the integration of balance piston sleeve and its housing. 
Accordingly the parts indicated with double strikethrough on the parts list on this page and the following 
page have been discontinued. 
As for the serial number and other detailed information of the compressor applied for this design 
modification refer to the clause 7.4 design modification information (No.C0956-02) in the chapter 7. 
If you require information about the suction cover (balance piston) before this design modification, refer 
to the instruction manual(No.2202B0-JJ-DA-J-N_2012.01.).