2200LZJE-HO-C6-N_2013.12.
Chapter 5 Maintenance
Compound 2-stage Screw Compressor 2016**C 5.7 Reassembly
5-48
5.7.7 Thrust Bearings (High/Low-stage)
【High-stage】 【Low-stage】
No. Part name Qty.
42-1, 42-2 Thrust bearing alignment spacer (1), (2) Two for each
41-1, 41-2 Thrust bearing outer race spacer (1), (2) Two for each
38-1, 38-2 Thrust bearing (1), (2) Two sets for each
250-1, 250-2 Thrust washer (1), (2) Two for each
40-1, 40-2 Lock washer (1), (2) Two for each
237-1, 237-2 Torsional slip washer (1), (2) Two for each
39-1, 39-2 Lock nut (1), (2) Two for each
43-1, 43-2 Thrust bearing gland (1), (2) Two for each
46-1, 46-2 Conical spring washer (1), (2) Eight for each
45-1, 45-2 Hexagon head bolt (1), (2) Eight for each
Figure 5-9 Development View of the Thrust Bearing Part
When assembling the disassembled thrust bearing without replacing any parts,
check the M and F stamp marks on the thrust bearing outer race spacer and
thrust bearing alignment spacer, and reassemble them in the same way as before
disassembly. This is essential to control the end clearance of the rotor discharge
side.
Even when assembling the same bearing, dimensions may become incorrect if
flakes of paint or dirt are caught between spacers and alignment spacers.
Regarding the direction of thrust bearing assembly, there may or may not be a
V-shaped mark for assembly on the outer periphery of the bearing. Follow the
instructions below for each case of assembling.
a) The procedure for assembling this portion is described in Figure 5-9. The important points are
explained below.
If there is a V-shaped mark for assembly on the outer side of the thrust bearing, assemble with the
pointed end of the mark on the inner side of the machine, as there is a slight directional difference
that affects end clearance adjustment.
If there is no V-shaped mark, assembly direction does not affect end clearance adjustment.
However, to clarify the difference between the inner side and outer side of the machine, assemble
the thrust bearing with the bearing number stamped on the outer side. Then, put down a V-shaped
mark on the side which is to be attached to the inner side of the machine, by using blue whetstone.
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