2200Q2JE-HO-KHM-N_2015.02.
Chapter 5 Maintenance and Inspection
Ammonia Semi-hermetic Motor with K-series Compressor 5.1 Precautions for Maintenance
5-14
5.4 Reassembly
When replacing a part, check if it is a correct one or not before using it for assembling.
Start the reassembly work after completing the cleaning of assembly parts and tools. Most of the
reassembly work will be performed in the reverse order of the disassembly work.
To tighten the fastening bolts of each section of the semi-hermetic motor, use the respective torque
specified in Table 5-5.
Start the tightening work with 50% of the tightening torque of the specified value for each pair of bolts in
the mutually facing position. Then, tighten all bolts in the clockwise order applying the specified torque.
As regards the tightening of bolts involving a gasket, the bolt tightened in the first place has a tendency
to be loosened. Accordingly, perform another round of the tightening with the specified torque with the
additional aim of checking the last tightening operation.
Table 5-5 Tightening Torques of Hexagon Head Bolt / Hexagon Head Cap Screw
No. Name
Type
Qty
Size
Torque
(N･m)
609
Motor Rotor Mounting Bolt for NHM30 Hexagon Head Cap Screw 1 M20×450
260
Motor Rotor Mounting Bolt for NHM45 Hexagon Head Cap Screw 1 M20×550
260
Motor Rotor Mounting Bolt for NHM60 Hexagon Head Cap Screw 1 M20×580
260
602 Motor Spacer Fastening Bolt Hexagon Head Cap Screw 12 M16×45 160
605 Motor Casing Fastening Bolt Hexagon Head Cap Screw 12 M16×50 220
616
Motor Bearing Retainer Fastening Bolt
Hexagon Head Bolt 12 M16×40 160
612
Motor Jacket Cover Fastening Bolt
Hexagon Head Bolt 12 M12×35 80
625
Motor Sealing Terminal Box Fastening
Bolt
Hexagon Head Cap Screw 6 M12×35
80
628
Motor Terminal Block Fastening Bolt
Hexagon Head Cap Screw 8 M12×35
80
HKFB
Water Flange Fastening Bolt
Hexagon Head Bolt, SUS 4 M10×20 10
622
Motor End Cover Fastening Bolt
Hexagon Head Bolt 8 M8×25 30
631
Motor Terminal Box Fastening Bolt
Hexagon Head Cap Screw 6 M8×15 10
619
Motor Oil Seal Retainer Fastening Bolt
Hexagon Head Bolt 6 M6×25 10
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