Spicer Lubrication Specifications Universal Joints - Manual (Page 3)

Warning - Rotating shafts can be dangerous. You can snag clothes, skin, hair, hands, etc.
This can cause injury or death. Do not go under the vehicle when the engine is running.
10 Series Driveshaft - Full Round Closed Yoke Holes
On 10 Series full round closed hole yokes, Figures B & C, loosen the bolts holding the bearing assembly that
doesn’t purge to release seal tension. It may be necessary to loosen the bearing assembly approximately 1/16
inch minimum. Apply grease gun pressure to purge seal or seals. If loosening does not cause purging, remove
the bearing assembly to determine cause of blockage. Re-tighten or replace bolts based on bolt designs as
detailed in Chart 2 or 3.
10 Series Driveshaft - Serrated Bolt with Lock Patch (Full Round)
The self-locking design (Figure B) for full-round yokes uses serrated bolts with lock patch and DOES NOT require
a lock strap (as in Figure C). When re-installing this type, it is important that the old serrated bolt be replaced
and the new bolt torqued to the proper specifications.
Re-Installing Serrated Bolts: Loosely install new bolts. (See the following chart below for bolt part numbers.)
Tighten the new bolts to the torque specified in Chart 2. See Warning
Chart 3 Chart 2
Figure C Figure B
Torque Specifications
10 Series Driveshaft - Bearing Plate Bolt Torque
Serrated Bolt Style Non-Serrated Bolt Style
SERIES BOLT P/N THREAD SIZE BOLT TORQUE
(LB-FT) (NM)
1610 5-73-109 .312-24 26-35 35-48
1710 6-73-109 .375-24 38-48 52-65
1760 6-73-109 .375-24 38-48 52-65
1810 6-73-109 .375-24 38-48 52-65
1880 7-73-115 .438-20 60-70 81-95
Warning - Failure to properly tighten bolts, and reuse of serrated bolts, could cause the driveshaft
to loosen and separate from the vehicle or machine, which could cause loss of control and could
result in serious personal injury or death.
Retightening of Bolts: Lock Strap Design. After lubricating the joint, run the bolts down until the bearing
plates are flush to the yoke faces, torque bolts to specification shown in Chart 3 and then bend the tabs of the
lock strap against the side of the bolt heads to lock the bolts in place. See Warning
SERIES BOLT P/N THREAD SIZE BOLT TORQUE
(LB-FT) (NM)
1610 5-73-709 .312-24 26-35 35-48
1710 6-73-209 .375-24 38-48 52-65
1760 6-73-209 .375-24 38-48 52-65
1810 6-73-209 .375-24 38-48 52-65
1880 7-73-315 .438-20 60-70 81-95