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-TORQยฎ 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 oโclock and 9 oโclock 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 .001โ โ .005โ
Please refer to TMC RP 618A โWheel Bearing Adjustment Proceduresโ
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 theย 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
- Durable Ratchet Head: Made from Hardened treated Chrome Vanadium steel alloy (Cr-V) Corrosion-Retardant: Satin Finish. Made in Taiwan
- Easy Storage: A sturdy plastic storage case is included. Non-Slip Grip: Knurled handle
- Easy to Read: High Contrast & Dual Range Scale. Accurate: Pre-Calibrated to ยฑ 4%
- Accessories included: 1/2" Drive 5" long Extension Bar
- Simple and Reliable: โClickโ sound tells the preset torque value is reached. Stop applying force when you hear and feel it.
- PRECISE & HIGH QUALITY - Manufactured in Taiwan, our torque wrench is engineered for superior precision. It ships pre-calibrated to +/- 4% accuracy, ensuring dependable results every time. Includes a calibration certificate with a trackable serial number for your assurance.
- DURABLE - Built to last, featuring a reinforced ratchet gear head made from hardened, heat-treated Chrome Vanadium alloy steel for maximum strength and durability.
- LONGEVITY - Protect your investment with our proprietary Electro-Black finish, providing advanced rust and corrosion resistance for extended tool life.
- PERFORMANCE - Easily read and set torque levels with our patent-pending dual-range scale. The high-contrast, yellow-on-black markings are designed for easy visibility, even in low-light conditions.
- OMFORT - Equipped with a reversible ratchet head that drives in both directions and measures torque in a clockwise direction. The ergonomic, knurled handle ensures a non-slip, comfortable grip, reducing hand fatigue.
- ใ9-in-1 Torque SolutionใComplete set includes 1/4", 3/8", and 1/2" drive click torque wrenches plus 6 essential adapters (extension bars, universal joint, drive adapters) securely stored in a sturdy portable case.
- ใHigh Precision & Dual ScalesใFactory-calibrated to ยฑ3% accuracy with included certificate; features dual-range scales (1/4": 10-220 in.lb, 3/8": 5-45 ft.lb, 1/2": 10-170 ft.lb) for versatile application coverage.
- ใClear & Safe Audible ClickใUpgraded loud "Click" sound provides a distinct, reliable signal (strong over 5 N.m, subtle under) when preset torque is reached, preventing overtightening and ensuring safety.
- ใSmooth 72-Tooth Ratchet & Quick ReleaseใReversible 72-tooth ratchet head offers a low 5ยฐ arc swing for use in tight spaces and smooth operation in both directions. Quick-release button ensures secure socket changes.
- ใDurable Construction & Wide UseใHardened Cr-V steel ratchet heads and phosphated adapters resist wear; aerospace aluminum handles ensure lightweight strength and corrosion resistance. Ideal for precise torque on bikes, motorcycles, cars, trucks, wheels, and industrial applications. Backed by 24-month support.
- PRECISION - Ships pre-calibrated to +/- 4% accuracy and ready to use. Include calibration certificate with traceable serial number.
- DURABLE - Reinforced ratchet gear head constructed from hardened, heat treated Chrome Vanadium alloy steel.
- LONG-LASTING - Rust & corrosion protection with our unique and newly invented Electro-Black finish treatment.
- PERFORMANCE - Features an easy-to-read, highlighted yellow print dual-range scale. Identify the markings even in low-light conditions.
- COMFORTABLE - Comes with a reversible ratchet head that drives in both directions and measure torque in a clockwise direction.
- 3/8 inch drive torque wrench with 15-80 ft.-lb./20.4-108.5 Nm range; reminder: to prevent the ratchet from breaking, please do not overload the torque wrench
- Durable ratchet head made from hardened treated Chrome Vanadium steel alloy (Cr-V); bright, full polish chrome finish wipes easily clean and resists rust and corrosion
- High contrast and dual range scale pre-calibrated to ยฑ 4%; tips: for precise scale adjustment, please use the imperial scale; the conversion formula between imperial scale and metric scale is 1 Nm = 8.86 in-lbs
- Includes sturdy plastic case for storage and portability
- NOTE: unlock before adjusting the torque value, lock after adjusting for stability of working torque; when finished, loosen locking ring and adjust to the lowest value for next use
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