shaft extended out of the winch drum, which would not be
the case as the disc/hub assembly is being installed.
Production tolerances will allow 0.010 to 0.041 inch
(0.25-1.04 mm) end play in the Sprag hub, clutch,
and sleeve assembly.
3. Using a rubber mallet, alternately tap the sleeve and the
hub firmly into place on the shaft. Be sure that the spacer
on the inner side of the sleeve remains in place while mov-
ing the assembly onto the shaft.
If the Sprag clutch is installed correctly, turning the
brake disc counterclockwise will cause the winch
drum to turn counterclockwise. Turning the brake
disc clockwise will have no effect upon the drum. Be
sure this is the case before continuing with assembly.
If the reverse is true, the Sprag clutch has been
installed backward and must be removed and assem-
Figure 5J-20. Sprag Clutch Oil Level
in the positions shown. Be sure to apply force only to the
inner race of the bearing, using a piece of pipe or other
suitable device to prevent force from being applied to the
Inspect the brake disc to be sure no grooving is
apparent. If wear patterns can be seen, it is probable
that the brake pads need to be replaced, or they
should be machined smooth, using adequate disc
brake servicing equipment.
5. Install the plate shown in Figure 5J-5. Be sure to drive
the two dowels shown (one on each side) flush with the
plate. If the winch is a Model 16 (which has two brake
assemblies) it will be necessary to remount the lower brake
assembly as shown in Figure 5J-5 before installing the plate.
6. Install the hydraulic motor as shown in Figure 5J-5. One
man should hold the motor while another turns the drum
Figure 5J-21. Winch Brake Assembly
so as to line up the motor shaft splines with the mating
splines in the sleeve. Be sure that the match marks on the
motor housing and the plate are lined up.
shown. However, no shims should be used unless the winch
was originally provided with them, in which case the same
shims must be reused. The slotted brake pad is adjustable to
relief valve. Pour oil, of the type specified in Section III for
place the pads firmly against the brake disc. However, this
the Sprag clutch, into the relief valve opening until the oil
adjustment should not be touched after it has once been
just runs out of the oil level opening. Replace the oil level
made. Any further adjustment of the winch brake should
plug and relief valve.
be made as described below.
9. After completing assembly of the winch, check and
shown. Note that shims are sometimes used at the point