9 Ordering of spare parts
9.1 Spare parts
To ensure against possible long and costly downtime periods, especially on critical services, it is advisa-
ble to have spare parts on hand.
The most desirable parts to have on hand are the following:
1.
Horizontally Split Case Pumps
1.
Rotating element. This is a group of assembled parts, including bearings, bearing hous-
ings, shaft, impeller(s), wearing rings, stuffing box bushings, and all rotating parts except
the coupling.
2.
Stuffing box packing (if any) - one set for each stuffing box.
3.
Stuffing box gland packing (if any) - one set for each gland.
4.
Mechanical Seals (if any) - one seal for each stuffing box.
2.
Frame Mounted End Suction Pumps
1.
Support Head. This is a group of assembled parts which includes all parts except the cas-
ing, suction cover and coupling. The impeller is not mounted on the shaft.
2.
Stuffing box packing (if any) - one set.
3.
Stuffing box gland packing (if any) - one set.
4.
Mechanical seal (if any) - one.
3.
Back Pullout End Suction Pumps
1.
Back Pull-Out assembly. This is a group of assembled parts which includes all parts ex-
cept the casing and the coupling.
2.
Stuffing box packing (if any) - one set.
3.
Stuffing box gland packing (if any) - one set.
4.
Mechanical seal (if any) - one.
With these parts on hand, pump can be easily and quickly reconditioned by replacing the worn parts.
An alternate, though not as desirable as that stated above, is to have on hand parts that are most likely
to wear and which can be used as needed.
Following is a list of these suggested parts:
1.
Stuffing box packing (if any) - one set for each stuffing box.
2.
Stuffing box gland packing (if any) - one set.
3.
Mechanical seal (if any).
4.
Shaft sleeve ( if any) .
5.
Ball bearings - one of each.
6.
Shaft nut ( if any).
7.
Bearing locknut and washer ( if any).
8.
Wearing rings (if any).
9.
Shaft- one required.
10. Impeller key (if any).
11. Stuffing box bushings (if any).
If it is not convenient or desirable to carry the spare parts listed above, the following list is suggested as
a minimum for servicing the pump under ordinary conditions of wear:
9 Ordering of spare parts
3107 Installation, Operation and Maintenance Instructions
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