QU30188U Used 1971-1977.5 GM 1/2 ton 4x4 Front Disc Brake Wheel Hub

QU30188U 1971-1977.5 Dana 44 6 Bolt Front Wheel Disc Brake Used Hub for Chevy, GMC 1/2 Ton 4x4s is a good used wheel hub for 1971 to early 1977 Chevy or GM K5 Blazer, Jimmy, K10, K15, and K1500 4x4s with Dana 44 front axles and Disc Brakes. QU30188U is just the bare hub, it does not include bearing cups, rotor, or studs. Inner bearing cup O.D. is 3.0625". QU30188U Used Hub is taken from axle assemblies our Research and Development Department used for part identification and tool design purposes. Available while supplies last.

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Dan the Gear Man® Tech Notes:
Clean
Check Run-out
Verify 1977 Inner Wheel Bearing Cup Size
Grease Wheel Bearings
Use Seal Installer
Matching Parts
Applications

Tech Note 1: Clean
QU30188U is a USED hub so the hub will show external rust. The wheel stud holes, bearing bores, and internal hub splines are good. You will need to clean any rust, corrosion, or grease off the rotor mounting face before installing your rotor.

Tech Note 2: Check Run-out
For safety, always install NEW wheel studs when assembling the hub and rotor. After assembly, check the rotor brake surfaces for lateral run-out. If lateral run-out exceeds 0.003", have your hub and rotor resurfaced (preferably with an on-vehicle brake lathe) before placing them in service. Failure to do so may cause brake pedal pulsation during braking.

Tech Note 3: Verify 1977 Inner Wheel Bearing Cup Size
QU30188U Hubs were used from 1971 to early 1977 on GM 1/2 ton Dana 44 front axles. The matching inner wheel bearing cup has an outside diameter of 3-1/16". Most 1977 1/2 ton GM 4x4s with Dana 44 front axles used QU30191 hubs and have an inner wheel bearing cup that has an outside diameter almost 3-1/4". If you have a 1977 axle, verify your inner wheel bearing cup size before ordering!

Tech Note 4: Grease Wheel Bearings
Before installing your wheel bearings, pack them with QU90018 Pyroplex® grease or other quality, disc brake rated, NLGI Grade 2 wheel bearing grease. I recommend you use QT5500 Wheel Bearing Packer to pack the bearings, but however you pack the bearings, your grease has to be clean and it MUST fill all the air spaces under the cage and between the bearing rollers.

Tech Note 5: Use Seal Installer
For best results, install a new wheel seal, QU50091, with QT1506 Seal Installer. QT1506 installer will not damage, ding, or bend the wheel seal and it keeps tension on the seal garter spring so the spring does not jump off the lip (a very common problem with makeshift seal installation methods).

Tech Note 6: Matching Parts
QU40593 Spindle for 1971-1977.5 Blazer, Jimmy, 1/2 ton Suburban and truck
TK4714/TK4742 Wheel Bearing Kits with Timken® Bearings
QU50447 Timken® Outer Wheel Bearing Cup
QU50448 Timken® Outer Wheel Bearing
QU50577 Timken® Inner Wheel Bearing Cup
QU50578 Timken® Inner Wheel Bearing
QU50091 Wheel Seal
QT1506 Wheel Seal Installer
QU52160 Wheel Bolt
QK4727 Round, 4 Slot Spindle Nut Kit
QU56018 Manual Hub Set
QU90018 Protection Extended Service Premium Synthetic Grease ES Synthetic Wheel Bearing Grease
QT5500 Wheel Bearing Packer
QT1025 4 Lug Spindle Nut Socket
Chevy & GMC Shop Manuals

Applications:
Chevy and GMC:
Blazer, Jimmy, K10, K15, 1/2 Ton Trucks and Suburbans with Disc Brakes: 1971, 1972, 1973, 1974, 1975, 1976, 1977, 1977.5