theofficeofnilsjohansson

Centrifugal Pump Inspection — Cooling Water System


Document No.	JDS-RPT-001
Revision	A
Date	2026-03-25
Status	EXAMPLE
Author	Nils Johansson
Project	N/A — Example document
Client	Internal

Note: This is an example document to demonstrate how a JDS report looks when completed. The content is fictional but representative of a real field service report.

1. Summary

Inspection of the No. 2 cooling water pump at Facility X revealed excessive bearing wear and seal degradation. The pump is functional but requires bearing replacement and mechanical seal overhaul within the next 30 days to prevent unplanned failure.

2. Background

The No. 2 cooling water pump (CW-P-002) was reported as showing increased vibration levels during routine monitoring. A visual inspection and basic measurements were requested to determine the cause and recommend corrective action.

3. Scope

Visual inspection of pump and motor assembly
Vibration measurement (handheld)
Bearing temperature check
Seal leakage assessment
Review of maintenance history

Excluded: Internal disassembly, alignment check (requires pump isolation).

4. Findings

4.1 General Condition

The pump exterior is in acceptable condition. No visible corrosion on the casing. Foundation bolts are tight. Coupling guard is in place.

4.2 Vibration Measurements

Location	Direction	Value (mm/s RMS)	Limit	Status
Drive end bearing	Horizontal	4.2	4.5	Warning
Drive end bearing	Vertical	3.8	4.5	OK
Non-drive end bearing	Horizontal	6.1	4.5	Alert
Non-drive end bearing	Vertical	5.4	4.5	Alert

The non-drive end bearing shows vibration levels above the alert threshold per ISO 10816-3 for Class II machines.

4.3 Temperature

Location	Measured	Limit	Status
Drive end bearing	62°C	80°C	OK
Non-drive end bearing	74°C	80°C	Warning

4.4 Seal Condition

Visible drip rate from the mechanical seal: approximately 2 drops per second. This exceeds acceptable leakage for this seal type. Fluid observed is clear (cooling water, no oil contamination).

4.5 Maintenance History

Last bearing replacement: 2023-11-15 (approx. 28 months ago). Recommended interval: 24 months. The pump is overdue for scheduled bearing maintenance.

5. Conclusions

The non-drive end bearing is showing early-stage failure symptoms (elevated vibration and temperature).
The mechanical seal is degraded and leaking beyond acceptable limits.
The pump is currently operational but at increased risk of unplanned failure.

6. Recommendations

#	Recommendation	Priority	Deadline
1	Replace non-drive end bearing	High	Within 30 days
2	Inspect and replace mechanical seal	High	During bearing replacement
3	Check shaft alignment after bearing replacement	Medium	At reassembly
4	Review and update preventive maintenance schedule	Medium	Within 60 days
5	Repeat vibration measurement after repair to confirm	Low	After repair

7. Attachments

Vibration measurement data (raw)
Thermal image of bearing housing
Maintenance history extract

Revision History

Rev	Date	Author	Description
A	2026-03-25	Nils Johansson	Initial release (example document)