ALTENM-9A Car System Block Diagram
What this PoC demonstrates (traceable to §708)
| Spec clause | Requirement | Where in this demo |
|---|---|---|
| 708 A.1 / A.2.b | Web-based, W3C compliant, works in all major browsers, nothing installed locally | Single HTML file, no plug-ins, no install |
| 708 A.2.a | Integrates descriptions, troubleshooting, procedures, figures, parts data, WMDS data | Door system chain: MM → IPC → ISM → fault codes |
| 708 A.2.d | Access control to edit; no login required to view/print | "Sign in to edit" button — viewing is open |
| 708 A.2.e | Context-sensitive Help everywhere | "? Help" — content changes per current screen |
| 708 A.2.f / A.3.c | Print any content to paper/PDF with one command | Print button (browser print → PDF) |
| 708 A.4 | Search by task no., part no. (OEM & MTA), section, keyword, fault code | Global search bar — try "F-2205" or "door" |
| 708 A.5 | Clickable/zoomable exploded views; live block diagrams; highlighted parts | IPC Figure 041-2; this block diagram |
| 708 A.1.a | Two-directional hyperlinks between ISM sheets and narratives | ISM view — schematic ⇄ narrative links |
Task 041-110-020 — Door Operator Assembly: Removal & Replacement
HIGH VOLTAGE — 750 VDC third-rail potential may be present. Confirm the car is de-energized and grounded per Operator's Manual §2.4 (Safe Cut-Out) before starting work. Failure to comply may result in death or serious injury.
The door operator weighs 38 kg (84 lb). Use the lifting fixture TTE-041-007. Two persons are required to remove the assembly from the header.
If this task was initiated by fault code F-2205 (Door Not Closed), complete the troubleshooting logic in that topic first to confirm the LRU disposition.
A. Preliminary Requirements
| Item | Reference | Qty |
|---|---|---|
| Lifting fixture, door operator | TTE-041-007 → Tool & Test Equipment Manual | 1 |
| Torque wrench 20–100 N·m | TTE-STD-012 | 1 |
| Door operator assembly (spare) | PN 8830-1240-01 / MTA 041-88-3120 → IPC Fig. 041-2, item 1 | 1 |
| Self-locking nut M10 (discard after removal) | PN 8830-1244-13 → IPC Fig. 041-2, item 7 | 4 |
B. Removal
- Open, tag and lock out the DCU circuit breaker (CB-41) at the No. 2 electrical locker. See ISM Sheet 041-SH-03 — Door Control Circuit for breaker location and circuit isolation points.
- Remove the door pocket access panel (6 quarter-turn fasteners). Refer to Figure 041-2 — click item ③ to view the panel in the exploded view.
- Disconnect harness connectors J-4101 and J-4102 from the door operator. Cap the connectors.
- Install lifting fixture TTE-041-007 and take up the load of the door operator assembly.
- Remove the four M10 self-locking nuts and washers. Discard the nuts — single-use hardware.
- Lower the operator assembly clear of the header and place it on a padded bench.
C. Installation
- Position the replacement operator on the header studs using TTE-041-007.
- Install four new M10 self-locking nuts with washers. Torque to 45 N·m ± 3 in a diagonal sequence.
- Reconnect J-4101 / J-4102. Verify connector locking tabs engage.
- Restore CB-41 and perform functional test per Task 041-990-010 (Door Functional Test). Confirm no active WMDS door faults.
Record the removed unit's serial number and bar code in the SBS List. The door operator is a serialized, bar-coded LRU (§701 A.1.b.1)h)).
System 044 — Heating, Ventilation & Air Conditioning
Each M-9A car is fitted with two roof-mounted HVAC units. The refrigerant circuit uses R-407C with a nominal charge of 5.2 kg per unit. Conditioned air is distributed through overhead ducts with return through side-wall grilles. Unit control is performed by the WMDS-connected HVAC controller; faults are reported on the fault code range F-44xx.
Demo stub — in the delivered IEM every system (001–099) carries the same full chain as the Door System example: description → procedures → IPC → ISM → faults.
Tool & Test Equipment Manual — System 041 extract
| Tool No. | Description | Used in Task(s) | Source |
|---|---|---|---|
| TTE-041-007 | Lifting fixture, door operator — 50 kg capacity, header-mount | 041-110-020, 041-110-030 | Contractor-furnished special tool |
| TTE-041-011 | Door obstruction test gauge set (per 49 CFR 238) | 041-990-010 | Contractor-furnished special tool |
| TTE-STD-012 | Torque wrench, 20–100 N·m, calibrated | Multiple | COTS |
| TTE-STD-030 | Portable Test Unit (PTU) — WMDS diagnostic laptop kit | All troubleshooting tasks | Contract-supplied |
Every special tool entry links back to the tasks that call it, and every task links forward to its tools — non-linear navigation per §708 A.4.a.
IPC Figure 041-2 — Door Operator Assembly (Exploded View)
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Parts List — Figure 041-2
| Item | OEM Part No. | MTA / Railroad No. | Description | Qty | UPA | LRU/SRU | Bar-coded |
|---|
ISM Sheet 041-SH-03 — Door Control Circuit
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Schematic Narrative (linked ⇄ sheet)
Closing command: the DCU receives the close request from the trainline and, provided no obstruction is sensed, energizes the door motor M through connector J-4101. When the leaf reaches the closed and locked position, the Door Closed Switch (DCS) completes the door-closed summing loop. Loss of this signal with a close command active is reported by the WMDS as fault F-2205. Circuit protection is provided by CB-41, the isolation point called out in Task 041-110-020, step 1.
Door Not Closed — Summing Loop Open
Description
The WMDS raises F-2205 when a door-close command is active and the door-closed summing loop remains open for > 8 s. See the loop on ISM Sheet 041-SH-03.
Troubleshooting Logic
- Connect the PTU (TTE-STD-030) and read DCU real-time I/O for the affected leaf.
- DCS input toggles when leaf is manually closed? → adjust DCS per Task 041-450-010.
- DCS input dead → check continuity J-4102 pins 3–4; repair harness or replace DCS (IPC Fig. 041-2).
- Motor stalls before closed position → replace drive belt (item 5) or the door operator LRU per Task 041-110-020.
- After repair, run Task 041-990-010 — Door Functional Test and verify the fault clears in WMDS history.
WMDS data associated with a fault or part is integrated into the IEM per §708 A.2.a.8).
Operator's Manual — §2.4 Door Cut-Out and Safe Isolation
Never bypass a door interlock in passenger service except as authorized by the Rule Book and with the affected door bagged and tagged.
To cut out a defective side entrance door: place the door cut-out switch (behind panel D, cab console) to CUT OUT, verify the amber door-bypass indicator lights, and notify the RCC. The WMDS logs the cut-out event; maintenance retrieves it via fault F-2205 history.
Controls & indicators views in the delivered IEM are clickable photographs (§708 A.5.f) — each control links to its function description.
Carbody Structural Repair Manual — Door Post Damage Assessment (extract)
| Zone | Member | Allowable dent (no repair) | Repair scheme | Qualified source |
|---|---|---|---|---|
| Z-41 | Door post, side entrance | ≤ 3 mm over 150 mm | CSRM-RS-041-A (weld repair, LAHT steel) | See CDRL_22 qualified source info |
| Z-42 | Door header | ≤ 2 mm | CSRM-RS-041-B (section replacement) | See CDRL_22 qualified source info |
Each repair scheme links to the applicable ISM sheets (for cable rerouting near structure) and to torque/consumable data in the Maintenance Manual.
Structured BOM & Bar Code / Serialization (SBS) — System 041 extract
| Level | OEM P/N | MTA P/N | Description | LRU | SRU | Serialized | Bar-coded | CFR 229-F |
|---|---|---|---|---|---|---|---|---|
| 1 | 8800-4100-00 | 041-88-3000 | Side entrance door system, per car | — | — | N | N | Y |
| 2 | 8830-1240-01 | 041-88-3120 | Door operator assembly | Y | N | Y | Y | Y |
| 3 | 8830-1241-02 | 041-88-3121 | Door motor, 74 VDC brushless | N | Y | Y | Y | N |
| 3 | 8830-1246-05 | 041-88-3126 | Drive belt, toothed | N | N | N | N | N |
| 3 | 8830-1244-13 | 041-88-3213 | Self-locking nut M10 | N | N | N | N | N |
Every system-specific SBS submittal is accompanied by the associated IPC extract identifying LRUs/SRUs (§701 A.1.b.1)h)). All submittals Excel-friendly.