MAYEKAWA 4M - Main Bearing Head Assembly Procedures (Pump Side)

Reciprocating Compressor M Series
5-44
5.5.14 Main Bearing Head Assembly
Steps Description
Part
No.
Steps Description
Part
No.
1
Hexagon head plug, magnet
119-3 7
Blow-by gas plate
305
2
Spacer, magnet
119-4 8
Gasket, blow-by gas plate
306
3
Magnet
119-1 9
Main bushing (pump side)
12-1
4
Oil pressure regulating valve
22
(Refer to "Replacing the Main Bushing
(Pump Side)".)
5
Thrust washer (pump side)
29
(Refer to "Assembly of the Thrust Washer
(Pump Side)".)
10
Main bearing head
8
6
Spring pin, thrust washer (pump side)
13
(Refer to "Assembly of the Thrust Washer
(Pump Side)".)
1. Remove the parts in the order shown in the figure.
2. Attach the parts in the reverse order of removal.
5.5.14.1 Replacing the Main Bushing (Pump Side)
If it is necessary to remove the main bushing (pump side), contact your local service center.
5.5.14.2 Assembly the Thrust Washer (Pump Side)
1. If the press–fit condition of the thrust washer
(pump side) retaining pin is loose, widen the end
of the thrust washer (pump side) retaining pin.