Peerless Pump 2BT11, Repair Instructions, Page: 3 / 8

FIGURE 1
SECTION II
–
INSPECTION AND REPAIR
2-1. INSPECTION. Visually inspect parts for damage
affecting serviceability or sealing. Emphasize inspection
of mating parts having relative motion
–
wear rings and
mechanical seal faces. Perform detailed inspection as
follows:
a. Check all O-rings for cracks, nicks or tears. Replace if
defective in any way.
b. Mount the shaft between centers or on V-blocks.
Check for eccentricity throughout entire length with a dial
indicator. Eccentricity must not exceed 0.003 inch total
indicator reading. Surfaces on which bearings mount
must be smooth and have a finish of 32 micro inches or
better.
c. Measure the OD of the impeller wear surfaces and the
ID of the casing rings (7). Compute the diametrical
clearance (ID minus OD) and compare with the limits
given in Table I. If measured diametrical clearance
exceeds two times the value in Table I, repair to restore
design clearance is recommended. ID surface of casing
ring must be smooth and concentric with ring OD.
Item
No.
Description Item
No.
Description
1A
1B Lower Casing
Upper Casing 18 Outboard Ball Bearing
2 Impeller 32 Impeller Key
2A Impeller Retaining
Ring 46 Coupling Key
6 Shaft 65 Mechanical Seal Stationary
Element
7 Casing Ring 73A Casing Gasket (Not Shown)
17 Gland 119B Gland O-ring
3