Related Manuals for Meritor PreSet
Summary of Contents for Meritor PreSet
- Page 1 Maintenance Manual MM-0637 PreSet by Meritor Hub Assemblies for Trailer Axles, and Steer and Drive Axles Revised 07-12...
- Page 2 Information contained in this publication was in effect at the time the publication was approved for printing and is subject to change without notice or liability. Meritor Heavy Vehicle Systems, LLC, reserves the right to revise the information presented or to discontinue the production of parts described at any time.
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Page 3: Table Of Contents
Contents Section 1: Introduction Description Hub Assembly Hub Pilot Wheel Mounting Section 2: Maintenance Inspection Oil-Lubricated Hubs Semi-Fluid Lubricant (Trailer Hubs Only) Check End Play Section 3: Removal and Disassembly Removal Hub Assembly Section 4: Prepare Parts for Assembly Clean, Dry and Inspect Parts Worn or Damaged Parts Ground or Polished Parts Rough Parts... -
Page 4: Hub Assembly
Meritor hub is a low-maintenance hub assembly manufactured for Meritor TN, TQ and TP Series trailer axles, and steer and drive axles. The hub subassembly includes an integral tooth wheel for a vehicle equipped with an anti-lock braking system ... -
Page 5: Hub Pilot Wheel Mounting
The hub pilot wheel mounting system is also referred to as the Uni-Mount-10™ (10 stud), WHD-10™ (10 stud), WHD-8™ (8 stud) and ISO system. Figure 1.5. Figure 1.5 SINGLE DUAL WHEEL WHEEL 4005733a Hub PiIot Mounting System Figure 1.5 Meritor Maintenance Manual MM-0637 (Revised 07-12) -
Page 6: Section 2: Maintenance
Park the vehicle on a level surface. Block the wheels to prevent the vehicle from moving. Set the parking brake. Check that no oil is present around the hubcap or on the wheel. If oil is present: Investigate the cause and take corrective action. Meritor Maintenance Manual MM-0637 (Revised 07-12) -
Page 7: Semi-Fluid Lubricant (Trailer Hubs Only)
Do not mix different types of grease. Only use lubricants approved by the original equipment manufacturer (OEM). Table A: TP and TN Series Trailer Axles Equipped with Conventional Hub Assemblies or PreSet by Meritor Hub Assemblies Lubricant Volume per Wheel End... -
Page 8: Check End Play
Place safety stands under the trailer frame or under each axle 4005735a spring seat. Figure 2.1. Figure 2.3 Figure 2.1 Grasp two wheel studs across from each other and pull and push the hub. 4003159a Figure 2.1 Meritor Maintenance Manual MM-0637 (Revised 07-12) - Page 9 0.006-inch (0.15 mm): No additional service is necessary. Do not adjust or retighten the spindle nut. WARNING ® If the spindle nut is loose prior to removing the PreSet hub, discard the old spacer and replace it with a new spacer before ®...
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Page 10: Section 3: Removal And Disassembly
Remove the tire and wheel assembly, using procedures For drum brake applications, remove the brake drum. Support specified by the wheel manufacturer. Figure 3.2. the drum during the removal process to prevent damage to the axle spindle threads. Meritor Maintenance Manual MM-0637 (Revised 07-12) - Page 11 If part of the seal remains on the spindle: Be careful that you do not damage the spindle when you remove it. Meritor Maintenance Manual MM-0637 (Revised 07-12)
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Page 12: Section 4: Prepare Parts For Assembly
A bent axle beam reduces axle strength, affects vehicle operation and voids Meritor’s warranty. Serious Thoroughly clean the hub cavity with spray degreaser. The personal injury and damage to components can result. -
Page 13: Dry Cleaned Parts
If any of the following conditions exist, you must replace the bearing. Cracked or broken separators Broken or cracked rollers Flaked areas on rollers or races Spalled rollers or races Overheated bearings Brinelled races Meritor Maintenance Manual MM-0637 (Revised 07-12) - Page 14 Use a press to install the bearing cup into the hub. Verify that the cup is fully pressed against the seat. Do not over press. Figure 4.6. WEAR MARKS 1003019a Figure 4.6 Figure 4.3 Figure 4.4 ETCHING AND PITTING 1003020a Figure 4.4 4005742a Figure 4.6 Meritor Maintenance Manual MM-0637 (Revised 07-12)
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Page 15: Wheel Studs
Support the inboard side of the flange adjacent to the stud head and perpendicular to the press cylinder. Use a press on the threaded end of the stud to force the stud out of the flange. Meritor Maintenance Manual MM-0637 (Revised 07-12) - Page 16 Figure 4.8 completely seated on the hub. If the ABS tooth wheel is not completely seated: Continue to press or drive the tooth wheel onto the hub until it is completely seated. 4005744a Figure 4.8 Meritor Maintenance Manual MM-0637 (Revised 07-12)
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Page 17: Section 5: Assembly And Installation
You must lubricate the inner diameter of the seal and the seal journal to prevent damage to components. Lubricate the inner diameter of the seal with a light film of clean wheel-end lubricant. 4005746a Figure 5.1 Meritor Maintenance Manual MM-0637 (Revised 07-12) -
Page 18: Installation
If a lubricant fill hole is available: Lubricant can be installed after assembly. Figure 5.5 4005749a Figure 5.4 4005750a Figure 5.5 CAUTION You must apply grease to the bearing journals to prevent fretting corrosion, which could result in damage to components. Meritor Maintenance Manual MM-0637 (Revised 07-12) - Page 19 Serious personal injury and damage to components can result. Install the inner spindle nut. Tighten it to 300 lb-ft (400 N m). Do not back off the spindle nut. Figure 5.7. Meritor Maintenance Manual MM-0637 (Revised 07-12)
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Page 20: Hubcap
You must install a PreSet by Meritor hubcap to qualify for tab into the undercut groove on the nut. Engage the mating Meritor’s warranty. Refer to brochure SP-95155, Commercial teeth. Figure 5.8. Vehicle Systems Warranty, for specific information. ... -
Page 21: Oil-Lubricated Hubs
Some hubs have a fill hole located in the hub system, bearings and wheel, and void Meritor’s warranty. barrel for adding lubricant. Figure 5.10. If the hub is equipped with a fill hole, remove the fill hole plug. - Page 22 Lightly lubricate the hub pilots to ease wheel installation and removal. Do not lubricate the mounting face of the drum or wheel. Rotate the hub so that one of the wheel pilot bosses is at the 12 o’clock position. Figure 5.13. Meritor Maintenance Manual MM-0637 (Revised 07-12)
- Page 23 13. After the first 50 to 100 miles (80 to 160 km), retighten all the nuts to 450-500 lb-ft (610-680 N m). Remove the load from the wheels when retightening. 4005756a 10-Stud Tightening Sequence Figure 5.15 Meritor Maintenance Manual MM-0637 (Revised 07-12)
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Page 24: Section 6: Specifications
12-18 lb-ft (15-25 N m) Minimum SAE Grade 5 fasteners, flat washers only Oil Fill Plug 1/4 NPT 20-25 lb-ft (25-35 N m) O-ring style 3/8 NPT 9/16-18 Disc Brake Rotor Refer to the brake manufacturer. Meritor Maintenance Manual MM-0637 (Revised 07-12) - Page 25 Meritor Heavy Vehicle Systems, LLC 2135 West Maple Road Printed in USA Troy, MI 48084 USA 866-OnTrac1 (668-7221) Copyright 2012 Revised 07-12 meritor.com Meritor, Inc. Maintenance Manual MM-0637 (16579)