NHTSA Campaign Number: 18V567
Manufacturer MAC Trailer Mfg., Inc.
Components WHEELS
Potential Number of Units Affected 424
Wheel End may Separate from Axle
If the wheel end separates from the axle, it can increase the risk of a crash.
Summary
MAC Trailer Mfg., Inc. (MAC) is recalling certain 2019 Dump and Waste trailers. The wheel end nut locking device on these trailers may not be properly installed, allowing the wheel end to separate from the axle.
Remedy
MAC will notify owners, and dealers will inspect the locking nut to ensure that it is properly installed, correcting it as necessary, free of charge. The recall is expected to begin in September 2018. Owners may contact MAC customer service at 1-800-795-8454. MAC’s number for this recall is 10-70-001 2018.
Notes
Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to www.safercar.gov.
Pro-Torq Inspection Procedure
ACTION PLAN: Pro-Torq Retaining Clip (Keeper) Inspection
August 29, 2018 RevC
SAFETY STATEMENT
Always consult with your Certified Safety Administrator prior to any Inspections or Procedures.
AXN Heavy Duty, LLC shall not be held liable for any actions or damage incurred during Inspections or Procedures.
REQUIRED INSPECTION PROCEDURE:
- Remove Hub Cap and discard gasket.
- Visually verify presence of Pro-Torq Retaining Clip (Keeper) (see Figure 1).
- Verify the mating teeth are engaged and the keeper tab and keeper arms are fully seated into the undercut groove in the Pro-Torq Wheel Nut (Figure 1). If all of these conditions are NOT met, see CORRECTIVE ACTIONS
#1 – CORRECTIVE ACTION – if Pro-Torq Keeper is present and mating teeth are engaged properly, but a keeper arm does NOT seem to be engaged in groove:
| #2 – CORRECTIVE ACTION – if Pro-Torq Keeper is missing or mating teeth are NOT engaged:
|
Figure 1: Pro-Torq Wheel-end Nut and Retaining clip Proper Installation
Figure 2: Trailer Inspection Checklist
STEMCO PRO-Torq Instructions
Step 1: Remove the Keeper from the nut
Use a small screwdriver to carefully pry the keeper arm from the undercut groove on each side until the keeper is released.
Step 2:
Thread the nut onto the axle until hand tight against the bearing
Step 3: Seat the Bearing
With hub/drum only:
Using a torque wrench:
A.
(1) Tighten the Nut to 200 ft-lbs. Spin the wheel at least one full rotation.
(2) Tighten the Nut to 200 ft-lbs. Spin the wheel at least one full rotation.
(3) Tighten the nut to 200 ft-lbs. B. Back the nut off until it is loose.
B. Back the nut off until it is loose.
With hub/drum/wheels:
A. Tighten the nut to 200 ft-lbs while the wheel is rotating.
B. Back the nut off until it is loose.
Step 4: Adjust the Bearing
With hub/drum only:
Using a torque wrench:
A.
(1) Tighten the Nut to 100 ft-lbs. Spin the wheel at least one full rotation.
(2) Tighten the Nut to 100 ft-lbs. Spin the wheel at least one full rotation.
(3) Tighten the nut to 100 ft-lbs.
B. Back the nut off one raised face mark.
With hub/drum/wheels:
Using a torque wrench:
A. Tighten the nut to 100 ft-lbs while the wheel is rotating.
B. Back the nut off one raised face mark.
WARNING! Failure to follow this instruction could cause the wheel to come off and cause bodily injury. Failure to back off the nut will cause the bearing to run hot and be damaged.
Step 5: Install the Keeper
ORANGE SIDE FACING OUT
A. Insert the keeper tab into the undercut groove of the nut and engage the keyway tang in the axle keyway. Insert keeper tab with the orange side facing out.
B. Engage the mating teeth.
C. Compress and insert the keeper arms, one at a time, into the undercut groove with a small screwdriver.
NOTE: Recommended practice is to replace the keeper each time the Pro-Torq nut assembly is removed for maintenance purposes.
Step 6:
If the inner tang does not line up with the keyway, back the nut off slightly until it does. Using a small screwdriver, compress and insert the keeper arms, one at a time, into the undercut groove. The orange painted side of the keeper must be facing out
Step 7:
Failure to follow this instruction could cause the wheel to come off and cause bodily injury. Make sure that the keeper tab and keeper arms are fully seated into the undercut groove.
Step 8:
Inspect keyway tang to ensure it does not contact the bottom of the keyway. If contact exists, immediately notify your PRO-TORQ® representative.
Step 9: Acceptable End Play
The dial indicator should be attached to the hub or brake drum with its magnetic base. Adjust the dial indicator so that its plunger is against the end of the spindle with its line of action approximately parallel to the axis of the spindle.
Grasp the wheel or hub assembly at the 3 o’clock and 9 o’clock positions. Push and pull the wheel-end assembly in and out while oscillating the wheel approximately 45 degrees. Stop oscillating the hub so that the dial indicator tip is in the same position as it was before oscillation began. Read the bearing end-play as the total indicator movement.
*Acceptable end-play is .001” – .005”
Please refer to TMC RP 618A “Wheel Bearing Adjustment Procedures”
Agreement for Allowable Standard Repair Times (SRT) for Pro-Torq Inspection Program
The following Terms of Service are effective August 29, 2018:
| BETWEEN: | Owner, Operator, Dealer, Repair Facility (Service Provider) performing the Inspection Procedures |
| AND: | AXN Heavy Duty (Company) 5534 National Turnpike Louisville, KY 40214 |
BILLING AGREEMENT for SRT:
Service Provider is prepared to provide the following professional services to Company.
- A qualified Service Provider will have to precisely follow the INSPECTION PROCEDURE – Pro-Torq Retaining Clips-RevC.pdf.
- For the Inspection Procedure, the Service Provider will charge the allowable rate of:
- Service Provider will fill in all fields on the Trailer Inspection Checklist.pdf and then submit to AXN per the instructions on the checklist, along with the final Service Provider Repair Invoice.
- Bills are payable by Company to Service Provider within 30 days of the receipt date of Invoice.
- Any Questions, or Repairs or Fees OUTSIDE of the scope of Inspection Procedures will need to be discussed with AXN Heavy Duty by emailing [email protected] or calling the Support Number at (502) 882-9115.
AXN Heavy Duty
[email protected]
502.882.9122
Pro-Torq Retaining Clip (Keeper) Inspection
August 29, 2018 RevC
Trailer Inspection Checklist – Pro-Torq Snap Ring
Agreement for Allowable Standard Repair Times (SRT) for Pro-Torq Inspection Program
August 29, 2018
Recall Acknowledgement
September 14, 2018
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