Goulds Pumps 3298 - IOM - Manual (Page 80)

Maintenance
Location Dry threads torque in ft-lbs (Nm)
Cover-to-frame – 370C 30 (40)
Drain screws – 426A XS and S 14 (19)
Drain screws – 426A M and L 18 (25)
Impeller trimming guidelines
Precautions
• Do not chuck the impeller assembly.
• Do not make cuts that are larger than 0.050 in. (0.127 cm)
• Do not over-tighten the arbor screw because this can crack the carbon bearings.
Required tools
Group Sizes Arbor tool
XS 1 x 1 1 /
2
-5 A06785A01
S 1 x 1 1 /
2
-6 A06785A02
1 x 1 1 /
2
-8
2 x 3-6
M and L 2 x 3-8 A06785A03
3 x 4-7
1 x 2-10
3 x 4-10
4 x 6-10
You can use nylon impeller arbor sleeves in place of bearings:
• XS group–B04674A01
• S group–B04676A02
• M group–B04676A03
• L group–B04676A04
1. Small radius 0.005 to 0.002
2. 45° rake angle
Figure 72: Recommended cutting tool
Tool features:
• 200 to 300 RPM
• 300 to 500 ft./min
• High-speed steel tool
• Light hand feed
Trimming guidelines
• Make sure that the arbor runs within 0.002 TIR.
78 3298 Family Installation, Operation, and Maintenance Manual