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ASME PALD 3b-1989 — Engine Stands Safety Standard Addenda (b)
🔩 ASME/ANSI PALD-3b-1989 is the second Addenda to the ASME/ANSI PALD-3-1987 Engine Stands volume, approved by ANSI on December 14, 1989, and issued on January 31, 1990, following the first Addenda (PALD-3a-1988). Issued as replacement pages with changes marked (b) — earlier Addenda changes are marked (a) — this Addenda is dominated by editorial refinements: the Introduction, Scope, and use/maintenance wording are further harmonized, while the Addenda continues the structural adjustments (deletion of para. 4.3 and renumbering) seen across the PALD series.
💡 Editorial revisions usually do not change technical requirements, but they remove ambiguity and unify wording. In compliance reviews and document citations they carry the same binding force — they cannot be ignored simply because they are “just text changes.”
1. Summary of Changes 📌
| Page | Location | Change |
|---|---|---|
| 1 | Introduction — General | (1) First paragraph editorially revised; (2) second paragraph revised |
| 2 | Section I (Scope) | Revised |
| 2 | Section II (Application) — first paragraph | Editorially revised |
| 5 | Section 2 — definition of “proof load” | Revised |
| 7 | Para. 4.2 | Revised |
| 7 | Para. 4.3 | Deleted |
| 7 | Para. 4.4 | (1) Redesignated as 4.3; (2) first paragraph editorially revised |
| 8 | Paras. 7.1.3 (c)(d) | Editorially revised |
| 8 | Para. 7.1.4 | Editorially revised |
2. Introduction and Scope 🔬
The revised Introduction and Scope further define the position of the Engine Stands volume: engine stands support the engine assembly during overhaul and allow rotation about its axis; the PALD series serves both as a guide to governmental authorities and as an industry guide for manufacturers, suppliers, purchasers, and operators. The use of portable automotive lifting devices involves hazards that cannot be eliminated by mechanical means alone, but only through careful, competent, trained, and qualified personnel — a principle reaffirmed in the revised Introduction.
- Scope: portable engine stands used during automotive service, maintenance, and storage.
- Boundary: similar devices for other commercial or industrial use within the scope of ASME/ANSI B30.1, Jacks, are not covered.
- Life cycle: design, construction, marking, operation, maintenance, and inspection.
⚠️ The changes to Sections I and II mean the scope and covered-equipment statements are updated. When determining whether equipment falls within the Standard, use the Addenda-revised text, not the earlier wording.
3. Proof Load Definition and Marking-Paragraph Adjustments 📋
The revised “proof load” definition continues the PALD series’ steady improvement of test criteria — proof load is a test load above rated capacity applied to demonstrate structural margin. In the marking section (Section 4), the revision of 4.2, the deletion of 4.3, and the redesignation of former 4.4 as 4.3 consolidate the product-marking requirements:
- Marked content: rated capacity, manufacturer name or trademark, and other identification must be clearly marked to prevent overload misuse.
- Warnings and instructions: the instructions and warning labels supplied with the product must meet the revised wording requirements.
- Traceability: markings and records must tie each product back to the manufacturer and the qualification test results.
🚨 Renumbering invites “old/new mixing”: a document citing both the deleted old 4.3 and the renumbered new 4.3 (formerly 4.4) creates ambiguity and compliance risk. Update every reference in one pass and record the change in the document revision history.
4. Engineering Practice Essentials 🛠️
- 📑 Documentation updates: bring paragraph references such as 4.3, 7.1.3, and 7.1.4 in design, test, and inspection documents in line with the Addenda.
- 🔍 Procurement and acceptance: note “including Addenda PALD-3a-1988 and PALD-3b-1989” and verify nameplate and conformity documents.
- 🔧 Use and maintenance: bolt the engine to the mounting head before rotating; check locking mechanisms and caster brakes before each use.
- 👷 Personnel training: keep training materials aligned to the current text, covering rotation work sequences and low-risk operating habits.
5. Frequently Asked Questions ❓
❓ Q: How do PALD-3b-1989 and PALD-3a-1988 differ?
A: 3a-1988, the first Addenda, emphasized the proof load definition, design qualification testing paragraphs, and the renumbering of 7.1.3 subparagraphs; 3b-1989, the second, is chiefly editorial and completes the deletion and renumbering of para. 4.3. Both must be applied together.
A: 3a-1988, the first Addenda, emphasized the proof load definition, design qualification testing paragraphs, and the renumbering of 7.1.3 subparagraphs; 3b-1989, the second, is chiefly editorial and completes the deletion and renumbering of para. 4.3. Both must be applied together.
🔍 Q: Do editorial revisions affect technical requirements?
A: Usually they do not change the requirements themselves, but they remove ambiguity, unify wording, and may coincide with paragraph-numbering adjustments. They carry binding force in compliance reviews.
A: Usually they do not change the requirements themselves, but they remove ambiguity, unify wording, and may coincide with paragraph-numbering adjustments. They carry binding force in compliance reviews.
❓ Q: What impact does the deletion of 4.3 have on cited documents?
A: The content of former 4.3 was deleted and former 4.4 was redesignated as 4.3. Documents citing “4.3” must confirm whether they mean the old or the new paragraph to avoid content mismatch.
A: The content of former 4.3 was deleted and former 4.4 was redesignated as 4.3. Documents citing “4.3” must confirm whether they mean the old or the new paragraph to avoid content mismatch.
❓ Q: When do Addenda changes take effect?
A: Under the PALD series rules, Addenda revisions take effect 3 months after the issue date. Manufacturers must then produce to the new requirements; users should adopt them in inspection documents.
A: Under the PALD series rules, Addenda revisions take effect 3 months after the issue date. Manufacturers must then produce to the new requirements; users should adopt them in inspection documents.
