Manual

Maintenance
Post-assembly checks
Perform these checks after you assemble the pump, then continue with pump startup:
• Rotate the shaft by hand in order to make sure that it rotates easily and smoothly and that
there is no rubbing.
• Open the isolation valves and check the pump for leaks.
Assembly references
Maximum torque values for fasteners
About this table
The torque values specified in this table are for dry threads. These values should be reduced
for lubricated threads only when lubricants of high stress ability, such as Molycote, are used.
Materials listed in this table are equal to the respective API 610, 10th Edition material classes.
In some cases, superior materials are substituted.
Construction - API designation
The following API designations apply to this table:
• S-1
• S-3
• S-4
• S-5
• S-6
• S-8
• S-8N
• S-9
• C-6
• A-8
• A-8N
• D-1
• Modified A-8 (non-API material)
Maximum torque values
Table 10: Maximum torque values, Nm (ft-lb) 3700 & 3710 / 3703 & 3700LF
Item Part Fastener ft-lbs (N- SA SX MA MX LA & LX XLA XLX XXL
Size m) &
XL
Torque 6 8 10 7 9 11 12 9 11 13 15 17.5 13 16 17 19 21 21 24 27
356 Stud cas- 5/8-11 UNC 59(80) X
ing
3/4-10 UNC 105(142) X X X X X X X X
7/8-9 UNC 270(230) X X
1-8 UNC 255(345) X X X X
1 1/8-7 UNC 361(489) X X X X X
425 Nut cas- 5/8-11 UNC 59(80) X
ing
3/4-10 UNC 105(142) X X X X X
7/8-9 UNC 270(230) X X X X
1-8 UNC 255(345) X X X X X X
1 1/8-7 UNC 361(489) X X X X
370H Screw 5/8-11 UNC 59(80) X X X X X X
bearing
3/4-10 UNC 105(142) X X X X
frame
7/8-9 UNC 270(230) X X X X X X
1-8 UNC 255(345) X X X X
353 Gland 5/8-11 UNC 59(80) X X X X X X X X X X X X X X X X X X
stud
3/4-10 UNC 105(142) X X
Model 3700, API Type OH2 / ISO 13709 1st and 2nd Ed. / API 610 8/9/10/11th Ed. Installation, Operation, and Maintenance 99
Manual