Low-Stage Gear Coupling; Disassembly; Inspection - mycom 2016 C Series Instruction Manual

5.6.15 Low-stage Gear Coupling

The drive side of the gear coupling is attached to the M rotor low-stage, in order to transmit power from
the low-stage to the high-stage.
<About the Change of the 2016**C Gear Coupling Method>
In March 1982, after exchanging approval drawings with the manufacturer, the coupling method was
changed from the initial type (coupling hub is directly connected using hexagon head screws) to the
method called "Φ125 special sleeve-type method" (coupling hub and sleeve are used).
This method was used for a long time. In October 2010, however, according to a design modification
notification, it was changed so as to attach a stopper inside the sleeve (compatible with the former
method).
* Date on which design was changed: The new method was applied first to assembly in oct. 19. 2010.
Figure 5-6 Gear Coupling Assembly Drawing

5.6.15.1 Disassembly

a) Driven sleeve 【151】 can be removed with hands.
Remove the drive hub 【152】.
Lift off the lock washer 【161】 claw, and loosen
the lock nut 【160】.
b) Two screw holes are provided on the drive hub.
Screw in eye bolts, and pull out the drive hub.
As it is clearance-fitted, it can be removed easily.
c) Leave the key embedded in the rotor shaft as it is.

5.6.15.2 Inspection

Check for deformation of tooth profiles and wear on the tooth surfaces of the hub and sleeve,
respectively. Mate it with the high-stage driven hub 【153】, and check for gap. If there is any problem,
replace the parts as a set. Find the cause at the same time.
Compound 2-stage Screw Compressor 2016**C
"Model: N2016SSC-LBM Serial number: 2023130".
(before and after Design Modification in October, 2010)
5-35
2200LZJE-HO-C6-N_2013.12.
Chapter 5 Maintenance
Photo 053 Current Parts of Gear Coupling
5.6 Overhaul