g010863
Figure 47
Models SR54, SR54-S, SR70, and SR70-S
1.
Drive chain
3.
Jam rod
2.
Jam nut
g237989
Figure 48
Model SR72
1.
Drive chain
3.
Jam rod
2.
Jam nut
Important:
Do not overtighten the chains; excess
tightening of chains can cause gearbox/sprocket
damage.
Lubricating the Drive Chain
Do not lubricate the drive chain unless it becomes stiff
because of rust. If the chain rusts, lubricate it lightly
with a dry-type lubricant.
Adjusting the PTO Clutch
Service Interval:
Yearly Before and after storage
WARNING
Friction clutches may become hot during use.
Do not touch.
To avoid the risk of fire, keep
the area around the clutch free of flammable
material and avoid prolonged slipping of the
clutch.
1.
At the end of the season, back off each of the
clutch nuts 2 turns (
).
g010847
Figure 49
1.
Clutch nut
2.
Clutch
2.
At the start of the new season, start the PTO
and allow the clutch to slip for a few seconds
before stopping the PTO. Turn back the nuts an
additional 2 turns.
Note:
Do not allow the clutch to slip for an
extended amount of time.
3.
If the clutch continues to slip after turning back
the nuts, tighten each nut an additional 1/4 turn
until the slipping ceases. Do not overtighten the
nuts, as shaft damage may occur.
Fastener Torque
Specifications
Models SR54,
SR54-S, SR70,
and SR70-S
SR72
Crank shaft nut
1288 N∙m
(950 ft-lb)
1627 N∙m
(1200 ft-lb)
Crank pin nut
1288 N∙m
(950 ft-lb)
1288 N∙m
(950 ft-lb)
Hinge bolt
359 N∙m
(265 ft-lb)
407 N∙m
(300 ft-lb)
34