GMW GMW14337 PDF

Note: Nothing in this standard supercedes applicable laws and regulations.

Note: In the event of conflict between the English and domestic language, the English language shall take precedence.

Purpose. To test and validate the performance, strength, and durability of wheel changing equipment.

Foreword. This procedure was designed for frame/ratchet, vertical screw and scissor jacks. It also includes required operating wrenches.

The following platform typically platform conducted test (p) or vendor typically vendor conducted test (v) conducted tests are included:

• Jack Durability Test pv. Subjects jack to seven lifts per jacking position. (Reference 4.3.1.)

• Jacking Load Measurement p. Obtains jack load versus lift curve versus input torque while jacking vehicle at gross vehicle mass (GVM). (Reference paragraph 4.3.2.)

• Proof Load Test.v Subjects jack, in load test machine, to twice the maximum recorded jacking load for ten minutes. (Reference paragraph 4.3.3.)

• Jack-Vehicle and Tire-Ground Test p Evaluates jack head cap clearances to lowest vehicle attachment position. Also, evaluates for 50 mm tire to ground clearance and maximum tire to ground clearance. (Reference paragraph 4.3.4.)

• Equipment Assembly Evaluation p. Evaluates effect of incorrectly assembled jacking equipment. (Reference paragraph 4.3.5.)

• Wheel Nut Wrench Strength/Durability Test v. Subjects wrench to minimum of 250% of manufacturer's maximum recommended Service Torque. (Reference paragraph 4.3.6.)

• Operating Over travel Test. Evaluates jack strength if attempted to operate past design limits. (Reference paragraphs 4.3.7 and 4.3.8.)

• Vehicle/Jack Stability on Level Ground p (Reference paragraph 4.3.9.)

• Vehicle/Jack Slope Stability p (Reference 4.3.10.)

• Head Cap Engagement p. Evaluates the security of engagement of a specific jack with its designated vehicle (Reference paragraph 4.3.11.)

The following are related procedures/tests.

• GMW15005 Standard Equipment Jack/Spare Tire–Vehicle Tests

Applicability. This procedure applies to all passenger cars, light-duty trucks and multipurpose passenger vehicle. Effective with new jacks designed after this procedure approval date or when designated for use on current jacks.