Maintenance
5-3
Torque limiter adjustment
•
Although the torque limiter clutch is factory (Dryair) set, periodic adjustment may be required. It is recommended tha torque setting of
the clutch be checked twice a season. With prolonged use, the two friction disks, located on either side of the A-plate sprocket, will
eventually show wear
.
•
It is important that the torque limiter clutch is adjusted properly. If the clutch slips too easily, the spool will take too long to stop and
hose will pile up on the reel. If the clutch does not slip at all, the protection on the Altivar 11 drive will take over and the spool will
again take too long to stop.
Note: A visual check may be required to confirm whether it is the clutch that is slipping or whether it is the Altivar 11 drive that is automati-
cally adjusting in an overload situation.
•
Check that the clutch is adjusted properly with the following procedure:
Physical check
•
With no power being applied to the reel, grip the edge of the spool plate and
apply full upward force, making sure that you are lifting with your legs and
not your back.
•
You should be able to cause the clutch to just slip with full lifting force.
•
If the clutch does not slip or slips too easily, refer to the “torque adjust
procedure”, below.
Torque adjust procedure
•
Insure that the adjusting nut is in a finger tight position.
•
If the adjustment nut is tighter than finger tight, loosen and complete previous
step.
•
Match mark the adjusting nut with the hub. Using a torque wrench tighten the
adjusting nut to 90ft*lb.
After the break-away torque is set, bend the tabs of the lock washer over the hex
flats of the adjusting nut.
Note: The torque limiter clutch nut requires a reasonable amount of force to adjust.
Use a torque wrench that provides you with at least 18” of leverage.
Run-in procedure
•
If the torque has been taken apart and reassembled or friction disks have been
changed, it is recommended that the clutch be “run in” by “slipping” the
center member (sprocket).
•
Insure that the adjusting nut is
in a finger tight position.
•
Match mark the adjusting nut
and hub. Advance the adjusting
nut ¼ turn from finger tight.
•
Slip the torque limiter sprocket
for 8 minutes at full RPM.
•
Refer back to the “Torque
adjust procedure” for final
readjustment.
7 - torque limiter adjustment
8 - torque limiter assembly