Slipring brush abrasion check and brush replacement — 1.30
Check each slip-ring brush for abrasion at two contact points against its printed limit line, and replace the brush — periodic-maintenance item 1.30 — once wear exceeds 2 mm at both locations.
Tools & parts
| Item | Part number | Qty |
|---|---|---|
| Standard tools | n/a in source | 1 set |
| Low-voltage slipring brushes and holders | BSX77-3487 | Required number not stated in source |
| Large-current slipring brushes (alone) | 4X79-05042 | Required number not stated in source |
| Rag | n/a in source | 1 |
| Scale (150 mm) | n/a in source | 1 |
| Cleaner | n/a in source | qty not stated in source |
| Cutter | n/a in source | qty not stated in source |
| Brush alignment jig | BSX77-4283 | 1 |
Safety
Hazard: Hazardous voltage in the slip ring and the brushes
Consequence: Electric shock
Avoidance: Turn OFF all the breakers on the switchboard / all the circuit breakers of the distribution board before touching the slip ring or brushes, or before starting this work
Hazard: Abraded slip-ring brush material (the brushes contain metal elements) generated while performing this work; source labels this call-out "NOTE" — reclassified CAUTION here as a personal-health precaution, not an equipment-only one
Consequence: Inhaling airborne abraded brush material
Avoidance: Thoroughly ventilate the work area and take protective measures such as wearing a protective mask before starting work
Hazard: Applying force to the ring while removing the Mylar ring, rear cover, or dome cover (step 1); source labels this call-out CAUTION — reclassified NOTICE here because the stated outcome is equipment damage, not personal injury
Consequence: Damage to the ring
Avoidance: When removing the cover, be careful not to apply a force to the ring or to damage it
Hazard: Mishandling the fragile brushes, or using sandpaper instead of a cutter to remove burrs, while checking/replacing brushes (step 4); source labels this call-out CAUTION — reclassified NOTICE here because all the stated outcomes are equipment-quality issues, not personal injury
Consequence: The brushes can be damaged or broken; if sandpaper grains enter the brushes, abnormal wear of the brushes may result
Avoidance: Handle the brushes carefully because they are fragile; be careful not to damage or break them; if burrs are found on the brushes, remove them using a cutter — never use sandpaper to remove burrs from the brushes
Hazard: Handling the brushes while pulling them out with needlenose pliers (step 8); source labels this call-out CAUTION — reclassified NOTICE here as an equipment-only outcome
Consequence: The brushes can be damaged or broken
Avoidance: Be careful not to damage or break the brushes
Hazard: Incorrectly connecting the brush cable while inserting the brushes into the sliding section and setting the cable (step 10); source labels this call-out CAUTION — reclassified NOTICE here as an equipment/procedure-quality outcome
Consequence: The brush cable can be left incorrectly connected
Avoidance: Verify that the cable is connected correctly
Hazard: Mounting the brush assembly without the alignment jig (step 13); source labels this call-out CAUTION — reclassified NOTICE here as an equipment-only outcome
Consequence: The brush sliding surface can extend beyond the ring
Avoidance: The brush assembly must be mounted using the alignment jig (BSX77-4283) so that the brush sliding surface does not extend beyond the ring
Full step-by-step for Slipring brush abrasion check and brush replacement — 1.30
All 14 steps are documented in the FSELIB Aquilion 16 (TSX-101A) service manual — re-authored, web-first, with the real figures from the source.
Open the full procedureRelated Gantry guides
Source: 2Y201-061E*E p.59-63. Preview re-authored by FSELIB — the full procedure with figures and steps is in the paid service manual.