Alamo A72 - Manual (Page 135)

MAINTENANCE
A60/A72 01/08 Maintenance Section 5-7
©2008 Alamo Group Inc.
MAINTENANCE
The slip clutch should be checked periodically and adjusted to compensate for wear. The lining plates are 1/8"
thick when new. Replace after 1/32" wear. If the mower has been idle for an extended period of time, or in wet
weather, before operating check to be sure the friction lining plates are not rusted/coroded together. Should
this occur refer to the procedure described in the "Seasonal Clutch Maintenance" section on the next page.
There are two friction lining plates in the slip clutch. These should be checked weekly for oil or grease, wear,
and moisture which could cause corrosion on the drive plates.
SEASONAL CLUTCH MAINTENANCE
It is important that the clutches slip when an obstacle or load heavier than the clutch setting is encountered.
Therefore, if the machine sits outside longer than 30 days and is exposed to rain and/or humid air it is
important to make sure that the clutch lining plates are not rusted/coroded together. Before using the cutter
use the following procedure to make sure the clutch will slip and give the overload protection required.
1. Loosen nuts (Figure Mnt-R-0090) on springs until the springs are free, yet remain secure on bolts.
2. Attach cutter to tractor and start the tractor. Set the engine speed at 1200 RPM.
3. Mark outer plates as shown in Figure Mnt-R-0090.
4. Engage the PTO (approximately one second) and then quickly disengage it. The friction lining plates
should break loose (check the mark).
5. Turn tractor off. Tighten the nuts on the disc spring clutch until Belleville spring is flat, then loosen each
nut 2 turns.