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ASME PALD 2b-1989 — Transmission Jacks Safety Standard Addenda (b)
📦 ASME/ANSI PALD-2b-1989 is the second Addenda to the ASME/ANSI PALD-2-1987 Transmission Jacks volume, approved by ANSI on December 18, 1989, and issued on March 30, 1990, following the first Addenda (PALD-2a-1988). Issued as replacement pages with changes marked (b) — earlier Addenda changes are marked (a) — this Addenda concentrates on the Introduction, Scope, and the restructuring of the marking section, where the deletion of para. 4.3 and the renumbering of paragraphs have the greatest impact on documents that cite the Standard.
💡 Paragraph renumbering is a “quiet but important” change in an Addenda: citing the old numbering after the change can land on an entirely different requirement. Users of the Standard should reconcile the change list and update every affected paragraph reference.
1. Summary of Changes 📌
| Page | Location | Change |
|---|---|---|
| 1 | Introduction — first and second paragraphs of General | Revised |
| 2 | Section I (Scope) | Revised |
| 2 | Section II (Application) — first paragraph | Revised |
| 5 | Section 2 — definition of “proof load” | Revised |
| 9 | Para. 4.2 | Revised |
| 9 | Para. 4.3 | (1) Deleted; (2) former para. 4.4 redesignated as 4.3 |
| 9 | New para. 4.3 | First paragraph revised |
2. Revised Introduction, Scope, and Application 🔬
The revised first and second paragraphs of the Introduction further clarify the purpose and status of the standard: the PALD series serves both as a guide to governmental authorities for regulation and as an industry guide for manufacturers, suppliers, purchasers, and operators. They also reiterate that the use of portable automotive lifting devices involves hazards that cannot be eliminated by mechanical means alone, but only by careful, competent, trained, and qualified personnel. The revisions to Section I (Scope) and Section II (Application) sharpen the boundaries of the Transmission Jacks volume:
- Scope: transmission jacks used to remove and install transmissions and differential assemblies from automobiles and trucks.
- Classifications: hydraulic, pneumatic, and mechanical force-transmitting means; combinations must be tested separately.
- Boundary: similar devices for other commercial or industrial use within the scope of ASME/ANSI B30.1, Jacks, are not covered.
⚠️ 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 once again emphasizes its central role in design qualification testing — proof load is a test load above rated capacity applied to demonstrate structural margin. In the marking section (Section 4), the revision of para. 4.2, the deletion of 4.3, and the redesignation of former para. 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 requirements, covering correct use and prohibited practices.
- Traceability: markings and documentary records must tie each product back to the manufacturer and the qualification test results.
🚨 Renumbering invites “old/new mixing”: a single technical document that cites 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.
4. Engineering Practice Essentials 🛠️
- 📑 Documentation updates: bring paragraph references such as 4.3 in design documents, test plans, and inspection procedures in line with the Addenda.
- 🔍 Procurement and acceptance: note “including Addenda PALD-2a-1988 and PALD-2b-1989” and verify nameplate and conformity documents.
- 🔧 Use and maintenance: check leaks, locking mechanisms, and restraints before each use; secure the transmission before raising or moving.
- 👷 Personnel training: keep training materials aligned to the current text, covering low-center-of-gravity work and load securing.
5. Frequently Asked Questions ❓
❓ Q: How do PALD-2b-1989 and PALD-2a-1988 differ?
A: 2a-1988, the first Addenda, emphasized the proof load definition and design qualification testing paragraphs; 2b-1989, the second, focuses on the Introduction, Scope, and the restructuring of marking paragraphs (deletion of 4.3 and renumbering). Both must be applied together.
A: 2a-1988, the first Addenda, emphasized the proof load definition and design qualification testing paragraphs; 2b-1989, the second, focuses on the Introduction, Scope, and the restructuring of marking paragraphs (deletion of 4.3 and renumbering). Both must be applied together.
🔍 Q: What does the deletion of 4.3 mean?
A: The content of former para. 4.3 was deleted and former para. 4.4 was redesignated as 4.3. Documents citing “4.3” by the old numbering must be checked to confirm the content still corresponds.
A: The content of former para. 4.3 was deleted and former para. 4.4 was redesignated as 4.3. Documents citing “4.3” by the old numbering must be checked to confirm the content still corresponds.
❓ Q: Why is the proof load definition revised repeatedly?
A: The proof load definition determines the magnitude of the qualification test load and the acceptance criteria. The Committee refines it based on industrial feedback so that test loads are determined more explicitly and acceptance is more objective.
A: The proof load definition determines the magnitude of the qualification test load and the acceptance criteria. The Committee refines it based on industrial feedback so that test loads are determined more explicitly and acceptance is more objective.
❓ Q: When do Addenda changes apply to products in production?
A: Under the PALD series rules, Addenda revisions take effect 3 months after the issue date. Manufacturers must then produce and test 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 and test to the new requirements; users should adopt them in inspection documents.
