McQuay Skyline IM 777-1, Руководство по установке и обслуживанию

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McQuay IM 777-1 23
Service and Maintenance
6
Tighten BOTH locking screws
A
in the outer locking ring
before operating the drive. Use a torque wrench and tighten
to the value shown in Table 14
.
7
Replace belts and adjust the motor base to tension the belts
properly. See Figure 36
.
8
Do not loosen any screws other than the two locking screws
A
in the outer locking ring when adjusting the sheave pitch.
Do not operate the drive until the locking screws have been
set to the torque specifications.
Figure 34: Sheave adjustment
Figure 35: Sheave adjustment
Table 14: Screw torque values
Nominal screw size
(dia–-thds/in)
Socket head cap screws
Flat head socket
screws
Hollow head set screws only
Lengths equal or greater than dia. For lengths (L)) less than dia.
Seating torque Seating torque Seating torque Seating torque Length (L) Seating torque
(in–lbs) (in–lbs) (in–lbs) (in–lbs) (in–lbs) (in–lbs) (in–lbs)
1/4–20NC 150 12.5 100 87 7.3 3/16 50
5/16–11NC 305 25.4 200 165 13.8 1/4 90
3/8–16NC 545 45.4 350 290 24.2 1/4, 5/16 150, 250
1/2–13NC 1300 108.3 N/A 620 51.7 N/A N/A
5/8–11NC N/A N/A N/A 1225 102.1 N/A N/A
C e n t e r l i n e s
m u s t c o i n c i d e
M u s t b e
p a r a l l e l
M u s t b e
p a r a l l e l
A d j u s t a b l e
S h e a v e
M o t o r
B e a r i n g
A d j u s t a b l e
C e n t e r - F l a n g e
F i x e d
C e n t e r - F l a n g e
S t a t i o n a r y
E n d - F l a n g e
C a p s c r e w s
( D o N o t R e m o v e )
( 2 ) L o c k i n g
S e t s c r e w s " A "
F l a t h e a d S o c k e t S c r e w s
( D o N o t R e m o v e )
I n n e r L o c k i n g - R i n g
O u t e r
L o c k i n g - R i n g
S p l i t T a p e r
B u s h i n g
( 3 ) H o l e s f o r
S p a n n e r W r e n c h
o r D r i f t