2205B0JE-DA-J-N_2014.05.  
5 Maintenance and Inspection 
Screw Compressor J-series  5.4 Disassembly and Assembly of the Compressor 
5-36 
5.4.11 Unloader Cover 
 170J/220J 
 
 
Order  Description 
Part 
No.
Order Description 
Part 
No.
1 
Hexagon socket head cap screw 
(M10×40/M12×50) 
76 14 Retainer, O-ring  83
2  Unloader cylinder cover assembly  — 15  O-ring (P10A)  82-1
3  O-ring (P14)  75-2 16  O-ring (P16)  82-2
4  Bush, P14 type O-ring  537 17  Unloader cylinder cover  74
5  O-ring (G135/G175)  75-1 18  Locknut (FU05SS/AN07)  69
6 
Hexagon socket head cap screw 
(M6×15) 
81 19 
Plain washer (170J)/ 
Lock washer (AW07) (220J) 
70
7  Bearing gland  80 20  Unloader piston assembly  —
8  Unloader indicator cam assembly  — 21  O-ring (P32/P44)  73
9 Unloader indicator cam  77 22 
Teflon cap seal 
(SUNR-BE-130/SUNR-BE-170) 
66
10  Retaining ring C type external (S10) 79 23  O-ring (P130/P170)  65
11  Ball bearing  78 24  Unloader piston  64
12  Spacer, unloader cover  84 25  Unloader spacer  420
13  Retainer assembly, O-ring  — 26  O-ring (P32/P44)  421
1.  Remove the parts in the order of the numbers shown in the figure. 
2.  Install the parts in the reverse order of removing.