ITT GOULDS PUMPS JCU, Installation, Operation And Maintenance Manual

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Table 2: Impeller Shim Thickness
Impeller Diameter (inches) Measure Clearance Minus Shim Thickness (in-
ches)
up to 11 .010 to .015
11 to 14 .015 to .020
over 14 .020 to .025
NOTICE:
• For 360TY with 320TY mounting flange motors only, delete impeller washer (199) and
impeller screw (370C) and replace with impeller nut (304) of 316SS for all pump con-
structions.
• Flat head screws (372J) furnished instead of hex cap screw (370J) on 3" JCU with
210TYZB motor.
• Threaded hardware coated with Loctite 242, or equal. When impeller nut is used, Loc-
tite 272 with primer should be used.
Table 3: Impeller hardware torque values
Motor Frame Impeller Mounting Hardware Required Torque, Lubricated (ft/
lbs)
180TY 1/2"-13 UNC bolt w/washer 27
210TYZ 5/8"-11 UNC bolt w/washer 54
250TY 5/8"-11 UNC bolt w/washer 54
320TY 3/4"-10 UNC bolt w/washer 66
360TY 1-1/2"-12 UNF nut 623
NOTICE:
1. Loctite 242 shall be applied to impeller bolt prior to each assembly. When impeller nut
is used, Loctite 272 with primer should be applied. Refer to Loctite for thread-lock appli-
cation instructions.
2. Impeller mounting hardware is designed for one time use only. New hardware shall be
installed during each assembly.
3. Torques in this table are based on a 416 stainless steel motor shaft material and
bolt/nut materials of SAE F593 Groups 1 & 2. For other material combinations, refer to
factory for torque value.
5.4 Reassembly
22 JCU Installation, Operation, and Maintenance Manual