Great Plains TSF1290 Operator Manual - Manual (Page 63)

Great Plains Manufacturing, Inc. Adjustments 59
05/10/2012 500-641M
Break Away Spring
Refer to Figure 53
If an outer boom arm strikes an obstruction, a pair of
spring-load rollers ride up and out of a detent, allowing
the arm to pivot back and upward.
The arm usually re-seats itself automatically. If it does
not:
1. Stop the tractor and set the parking brake.
2. Set hydraulic pump circuit to Float or shut down
PTO.
3. Wear gloves and swing the arm forward until the roll-
ers are back in detent.
Periodically check that break-away springs are com-
pressed to dimension
in the figure:
5 1 ⁄
2
in (14cm)
Adjust spring by turning mounting nut under spring.
More serious obstructions may fail a shear bolt at the
inner arm pivot. See page 64 for replacing this shear
bolt.
Figure 53
Break-Away Spring
17001
1
1