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ASME PALD 10b-1991 — Service Jacks Addenda (b)
📐 ASME PALD 10b-1991 is Addenda (b) to ASME/ANSI PALD 10-1988, the Service Jacks volume of the Safety Standard for Portable Automotive Lifting Devices. Approved by ANSI on February 14, 1991, and issued May 15, 1991, it continues the replacement-page revision of the 1988 edition; its changes are flagged by margin note (b), while changes from the previous addenda are flagged (a). The focus of this addenda is refining definitions, restructuring the design qualification testing clauses, and updating statements about manufacturer, repair, and supplier responsibilities.
💡 Addenda (b) and (a) apply cumulatively: margin note (b) flags this addenda’s changes and (a) flags the previous addenda’s changes. To obtain the complete current text, consult both addenda together with the 1988 base document.
1. Main Revisions in Addenda (b) 📌
PALD 10b-1991 covers a wide area: Section 2 revises the definition of functional damage and adds definitions of manufacturer, repair, and supplier; clauses 3.3 and 3.5 of Section 3 are revised; 4.1 (title and text) and 4.2 are revised; Section 5.1 is renumbered and revised; Section 6 and clauses 7.1.4 and 7.1.5 are revised; and Appendix A is updated.
| Section | Location | Change |
|---|---|---|
| Section 2 | Functional damage | Definition revised; manufacturer/repair/supplier definitions added |
| 3.3 / 3.5 | Design | 3.3 (a),(b) revised; 3.5 revised |
| 4.1 / 4.2 | Marking | 4.1 title and text revised; 4.2 revised |
| 5.1 | Design qualification testing | Renumbered (original 5.1.1 becomes 5.1.7); 5.1.4–5.1.7 revised |
| Section 6 / 7.1 | Instructions & warnings | 6 (a),(d) revised; 7.1.4, 7.1.5 revised |
| Appendix A | Appendix A | Updated |
⚠️ The design qualification testing clauses underwent major renumbering: original 5.1.1 became 5.1.7, and original 5.1.2–5.1.7 became 5.1.1–5.1.6. Any old document citing 5.1 subclauses must be checked against the latest numbering.
2. Refining the Definitions System 🔧
This addenda significantly improves the terminology framework. The functional damage definition is revised to emphasize permanent deformation of the structure or saddle that causes loss of sealing capability in hydraulic and/or pneumatic components, loss of load, or failure to meet the design qualification limits of Section 5. The new definitions of manufacturer (a company that produces goods), repair (the activity of restoring the device), and supplier (an organization providing the equipment and instructions) clarify the roles in the product responsibility chain, giving operators a clear basis for judging equipment condition.
🚨 Functional damage is the key criterion for removing a unit from service: once permanent deformation causes sealing failure, load loss, or excessive set, the unit must be taken out of service immediately — it must not continue to carry loads.
3. Service Jack Technical Requirements and Test Clauses 📏
Service jacks remain classified into hydraulic, pneumatic, pneumatic/hydraulic, and mechanical types. The core of design qualification testing (Section 5) is the proof load test: the sample is subjected to a load typically 1.5 times rated capacity and must show no functional damage within the specified hold time. After renumbering, the 5.1 subclauses map clearly onto rated-load, stability, sealing, and load-limiting verifications, making execution and recording by inspectors more systematic.
| Test / Check | Typical Requirement | Addenda (b) Change |
|---|---|---|
| Proof load test | 1.5× rated capacity, no damage during hold | 5.1 renumbered; acceptance criteria refined |
| Functional damage | No sealing failure / load loss / excessive set | Definition revised for clarity |
| Stability | No tipping on hard level surface | 3.3 (a),(b) revised |
| Product marking | Permanent marks: maker, rated capacity, etc. | 4.1 title and text revised |
| Warnings & instructions | Hazard warnings and instructions complete | Section 6 (a),(d) revised |
4. Engineering Practice Essentials 🛠️
- 🔍 Responsibility clarity: use the new manufacturer/repair/supplier definitions to assign clear responsibilities for supply, repair, and operation of service jacks in purchase contracts and maintenance agreements.
- 🔧 Removal criterion: put the revised functional damage definition into daily inspection checklists — remove and send for repair as soon as it is triggered.
- 📋 Numbering check: update old files citing 5.1 subclauses to the renumbered 5.1.1–5.1.7 structure.
- 📊 Addenda management: keep “PALD 10-1988 + 10a-1989 + 10b-1991” as one complete set in the technical library — none of the three may be missing.
💡 Addenda (b) makes the standard more practical: clear terminology and responsibilities and a cleaner clause structure materially improve operability for manufacturing, inspection, and repair.
5. Frequently Asked Questions ❓
❓ Q: Which terms did PALD 10b-1991 revise?
A: It revised the functional damage definition and added manufacturer, repair, and supplier definitions, clarifying the roles of all parties in the product responsibility chain and the criteria for judging equipment condition.
A: It revised the functional damage definition and added manufacturer, repair, and supplier definitions, clarifying the roles of all parties in the product responsibility chain and the criteria for judging equipment condition.
❓ Q: Why were the design qualification clauses renumbered?
A: To reorder the 5.1 subclauses logically (original 5.1.1 moved to 5.1.7, the rest shifted), so rated-load, stability, sealing, and load-limiting verifications read clearly and are easy to execute and trace.
A: To reorder the 5.1 subclauses logically (original 5.1.1 moved to 5.1.7, the rest shifted), so rated-load, stability, sealing, and load-limiting verifications read clearly and are easy to execute and trace.
❓ Q: How do I apply the functional damage criterion in daily use?
A: During pre-use checks and periodic inspection, look for damage to the lift arm, saddle, or base that causes sealing failure, load loss, or excessive set; on confirmation, remove the unit from service and send it for professional repair.
A: During pre-use checks and periodic inspection, look for damage to the lift arm, saddle, or base that causes sealing failure, load loss, or excessive set; on confirmation, remove the unit from service and send it for professional repair.
❓ Q: How do addenda (b) and (a) apply together?
A: Both addenda sit on top of the 1988 base edition, flagged by margin notes (b) and (a) respectively. Consult both together with the base edition to obtain the complete current text.
A: Both addenda sit on top of the 1988 base edition, flagged by margin notes (b) and (a) respectively. Consult both together with the base edition to obtain the complete current text.
