Farr HD8625 Technical Manual page 53

M
ainTenance
I. ASSEMBLY PROCEDURES
Assembly of Farr Hydraulic Power Tongs is simple, and can be accomplished without the use of special tools. The instructions on this
page are presented as a guide only, and are similar to the assembly sequence our technician would use while assembling the tong in
our plant.
NOTE ON INSTALLATION PRACTICES: Ensure all bearings are liberally greased before installing over a shaft or into gears or
bearing caps. When inserting a shaft through a support roller assembly ensure shaft is greased. Also ensure all metal-to-metal
contact in the gear train is adequately greased.
exploded diagrams in Section 5.
ALL FASTENERS USED DURING REASSEMBLY OF LOAD-BEARING COMPONENTS (CHAIN
SLINGS, RIGID SLINGS, BACKUP LEGS) MUST BE TIGHTENED TO THE CORRECT TORQUE.
THREADED FASTENERS USED IN LOAD-BEARING DEVICES MUST BE SECURED WITH RED LOC-
TITE™.
SIZE
1/4 - 28 (.250)
5/16- 24 (.3125)
3/8 - 24 (.375)
7/16 - 20 (.4375)
1/2 - 20 (.500)
9/16 - 18 (.5625)
5/8" - 18 (.625)
3/4 - 16 (.750)
7/8" - 14 (.875)
1 - 12 (1.000)
1 - 14 (1.000)
1 1/8 - 12 (1.125)
1 1/4 - 12 (1.125)
1 3/8 - 12 (1.375)
1 1/2 - 12 (1.500)
SIZE
1/4 - 20 (.250)
5/16- 18 (.3125)
3/8 - 16 (.375)
7/16 - 14 (.4375)
1/2 - 13 (.500)
9/16 - 12 (.5625)
5/8" - 11 (.625)
3/4 - 10 (.750)
7/8" - 9 (.875)
1 - 8 (1.000)
1 1/8 - 7 (1.125)
1 1/4 - 7 (1.125)
1 3/8 - 6 (1.375)
1 1/2 - 6 (1.500)
REPLACEMENT FASTENER (BOLTS, NUTS, CAP SCREWS, MACHINE SCREWS, ETC.) USED
DURING MAINTENANCE OR OVERHAUL MUST BE GRADE 8 OR EQUIVALENT UNLESS OTHER-
WISE SPECIFIED.
When graphics are not used in the assembly process, please refer to the relevant
TIGHTENING TORQUE GUIDE
SAE GRADE 8 - FINE THREAD
CLAMP LOAD
3,263
5,113
7,875
10,650
14,400
18,300
23,025
33,600
45,825
59,700
61,125
77,025
96,600
118,350
142,275
SAE GRADE 8 - COARSE THREAD
CLAMP LOAD
2,850
4,725
6,975
9,600
12,750
16,350
20,325
30,075
41,550
54,525
68,700
87,225
103,950
126,450
PLAIN
14 ft. lbs.
27 ft. lbs.
49 ft. lbs.
78 ft. lbs.
120 ft. lbs.
172 ft. lbs.
240 ft. lbs.
420 ft. lbs.
668 ft. lbs.
995 ft. lbs.
1019 ft. lbs.
1444 ft. lbs.
2012 ft. lbs.
2712 ft. lbs.
3557 ft. lbs.
PLAIN
12 ft. lbs.
25 ft. lbs.
44 ft. lbs.
70 ft. lbs.
106 ft. lbs.
153 ft. lbs.
212 ft. lbs.
376 ft. lbs.
606 ft. lbs.
909 ft. lbs.
1288 ft. lbs.
1817 ft. lbs.
2382 ft. lbs.
3161 ft. lbs.
hD8625 8- " 35K T
5
/
8
PLATED
10 ft. lbs.
20 ft. lbs.
37 ft. lbs.
58 ft. lbs.
90 ft. lbs.
129 ft. lbs.
180 ft. lbs.
315 ft. lbs.
501 ft. lbs.
746 ft. lbs.
764 ft. lbs.
1083 ft. lbs.
1509 ft. lbs.
2034 ft. lbs.
2668 ft. lbs.
PLATED
9 ft. lbs.
18 ft. lbs.
33 ft. lbs.
52 ft. lbs.
80 ft. lbs.
115 ft. lbs.
159 ft. lbs.
282 ft. lbs.
454 ft. lbs.
682 ft. lbs.
966 ft. lbs.
1363 ft. lbs.
1787 ft. lbs.
2371 ft. lbs.
T M
echnical anual 3.11
ong