DESCRIPTION
Locking hubs provide a means of engagement of front wheels on vehicles with front drive axle. When hub is engaged, full power is transmitted to both front wheels. When hubs are disengaged, front wheels are free to turn, but axle shafts and differential will remain idle.
Engagement is accomplished through action of gears within hub. With hub in engaged position, clutch body and hub body of hub assembly act as one piece to connect axle shaft to wheel hub.
Removal
- Remove bolts and tabbed lock washers (if equipped), attaching hub body to axle hub. Retain bolts and washers. Remove large retaining ring from axle hub and small retaining ring from axle shaft. Remove hub clutch and bearing assembly.
- Clean hub components in solvent. Dry components, using compressed air or clean shop towel, or air dry. Be sure old lubricant, dirt, water, or other foreign materials are flushed out.
Note. DO NOT turn hub control dial until hub has been installed. The hub clutch nut and cup can be damaged severely, if dial is rotated while hub is off vehicle.
Scheme 3
Installation
- Lubricate hub components with all-purpose chassis lubricant. Apply light coat of lubricant only. DO NOT pack hub with lubricant.
- Install hub clutch assembly and small retaining ring on axle shaft. Install large retaining ring in axle hub. Install new "O" ring if hub body is being replaced.
- Position hub body in clutch. Align bolt holes in axle and hub body. Install bolts and tabbed lock washers (if equipped). Tighten bolts to 30 INCH lbs. (3.4 N.m).
- Raise vehicle front end. Turn hub control dials to position "2" and rotate wheels. Wheels should rotate freely. If wheels drag, check hub installation. Also, be sure the control dials are fully engaged in 4WD position.
Note. Front drive hubs are serviced as either a complete assembly or subassembly, such as hub body or clutch assembly only. DO NOT attempt to disassemble these units. If entire hub or subassembly is bad, replace as a unit only.