What is acceptable wheel bearing end play after adjusting using the TMC RP 618 procedures?
3) to verify wheel bearing setting. A dial indicator measures wheel bearing end play after the adjustment procedure is complete. The correct end play range is 0.001 in. to 0.005 in. per “TMC RP 618”.
How do you adjust a wheel bearing?
The bearing is adjusted by tightening the hub nut if it is too loose, or loosening the nut if it is too tight. It should be done with the wheel on and raised on an axle stand. Rock the wheel from side-to-side and top-to-bottom to check for bearing wear.
What happens if you over tighten wheel bearings?
“Excessive preload will cause excessive friction and the bearing will run hot, compromising lubrication and eventually leading to flaking (material coming off) at the large end of the rollers/races,” he says. “On the other hand, adjusting the bearing too loose causes excessive looseness and vibration in the system.
What is proper wheel bearing endplay for a manual adjust hub?
Manual Wheel Bearing Adjustment Procedures.
How tight should a bearing nut be?
The nut on the spindle should be tightened until snug, with no side-to-side play in the hub and then backed off, about a quarter of a turn. The nut finger should be tight until the castle nut or cotter pin is used.
How do you calculate preload on a bearing?
The requisite preload force can be estimated using:
- F = k d.
- a.
- i) Axial displacement method: The axial displacement method is based on the relationship between the preload force and the elastic deformations within the bearing arrangement.
How tight should the nut be on a trailer wheel bearing?
How Tight Should Spindle Castle Nuts be Tightened The nut on the spindle should be tightened until snug, with no side-to-side play in the hub and then backed off slightly, about maybe a 1/8 of a turn.
Can you over tighten a wheel bearing?
How tight do you do up wheel bearings?
For context, the tolerable end-play for truck wheel bearings is the same: 0.001 to 0.005 inches, also expressed as 1 to 5 mil or 0.025 to 0.127 mm. In other words, it’s perfectly acceptable to adjust wheel bearings so that they are just a little bit loose, but not too loose.
Can you reuse axle nut?
The shop manual warns not to reuse the axle nut, so I trotted off to the parts store for a new one. I’m referring to the special nuts on major components like axle shafts and ball joints where a lost (or loosened) nut can cause accidents, even fatal accidents.
What is the RP 618 for axle adjustment?
Timken recommends the Technology & Maintenance Council (TMC) Recommended Practice (RP) 618 to achieve proper end play adjustment of steer, drive and trailer axle bearings. WARNING Failure to observe the following warnings could create a risk of death or serious injury. Proper maintenance and handling procedures are critical.
What are the RP requirements for ABS warning lamps?
RP 144 Minimum Performance Requirements for In-Cab Trailer ABS Malfunction Lamps — Identifies minimum performance requirements for ABS warning lamps. RP 145 Symbols for Electrical Circuit Protection — This RP endorses an SAE Recommended Practice that standardizes electrical circuit symbology.
What is the Rp 135 multi pin connector repair guide?
RP 135 Multi-Pin Connector Repairs — Provides fleet maintenance organizations with an effective guide for obtaining the proper multi-pin connec- tor repair products and services. The Rec- ommended Practice is not intended to define repair procedures because of the vast number of different connector systems on the market.
How many recommended practices are in the TMC manual?
This comprehensive manual contains more than 350 Recommended Practices (RPs). A Recommended Practice is a specification or practice-the adoption of which is voluntary -that is used to assist fleets and equipment manufacturers in the purchase, design, maintenance and performance of their equipment.
