8
5. Keep dirt out of the chuck. It could enter the unit causing dam
-
age. If dirt gets into the chuck, disconnect the driver from the
air supply, remove the chuck and clean out the dirt. Be careful
to keep dirt out of the driver during reassembly and be sure the
bolts holding the chuck are tight and properly torqued.
Make certain the surfaces are free of dirt, oil and grease. It is
important to install compression washers properly or they will
not lock the bolt securely. Place the compression washer with the
center of the cone next to the bolt head being tightened (See
Fig.
5
). Then tighten the bolt with a torque wrench until the proper
torque for the size of bolt being tightened is reached (See
Fig. 6
).
Check bolt tightness daily.
If you are driving the same temporary posts time after time, the
posts will tend to fill with dirt after a few drives. The dirt may
be pumped out the top of the post into your driver. Rhino Tool
Company suggests you pinch the lower end of the post together,
which will keep the dirt out.
There are several benefits to doing this. It will decrease the
weight of your temporary post stock by hundreds of pounds
making it easier to handle the posts, it eliminates the mess of
dried dirt falling out of the posts and eliminates hundreds of
pounds of extra weight being hauled time and again by your
trucks and trailers which saves you fuel.
Fig. 6
-
Proper bolt torque . Refer to the data in the above chart
when reconnecting the chuck to the driver after cleaning out dirt
or foreign materials from inside the chuck .
Bolt Torque Chart
Thread Size
Maximum Torque Ft . Lbs . (N*m)
(Grade 5)
Dry
Lubed
7/16-14 UNC
49 (66 .43)
37 (50 .14)
1/2-13 UNC
75 (101 .68)
57 (77 .28)
3/8-16 UNC
31 (42 .03)
23 (31 .18)
Bolt
Compression
Washer, in correct
position
Fig. 5
-
Proper installation of compression washer and bolts .