Bush Hog 3715 Operator's Manual page 22

P. Attach driveline retainer ring to the mounting
bracket welded to the deck of each wing in front of the
gearbox input shaft. Secure with two 1/2" x 1-1/2"
bolts, lockwashers and hex nuts. (Figure 5-14)
Q. Install hinge plate on wing gearboxes using four
10mm x 25mm bolts, flatwashers and lockwashers
per shield. Install shield on hinge plate using 1/8 x
3/4" cotter pins. Lower shield and secure with lynch
pin.
R. Install wing drivelines, attaching clutches to cen-
ter transfer gearbox. Secure drivelines with tapered
pin, lockwasher and nut. Tighten nut to 30 ft./lbs.
Pull on each driveline section to make certain it is se-
curely attached.
Figure 5-14 Driveline Retainer Ring
Mounting Bracket
S. If optional pillow block driveline assembly is
used, place mount weldment between tongue plates
and fasten with 3/4 x 4" bolts, lockwashers and nuts.
Install spacer between lugs of mount, insert pivot
spacer tube, and fasten with 3/4 x 9-1/2" bolt, lock-
washer and locknut. Slide bearing onto jackshaft until
it is against shoulder of shaft. Slide lock collar up to
bearing and turn in the direction of shaft rotation until
it slips over the inner ring extension. (Figure 5-16)
Turn collar quickly in the direction of shaft rotation (ap-
prox. 1/4 turn) to tighten.
T. Align pillow block bearing housing between lugs
on spacer link and fasten with pin weldment, lock-
washer and nut. (Figure 5-15)
U. Place punch in blind hole in collar. Strike punch
sharply with hammer in the direction of shaft rotation
to tighten against inner ring extension. (Figure 5-17)
Tighten setscrew to 20 ft./lbs.
V. Position shield over bearing housing and fasten
with 1/2 x 1-1/4" capscrews and lockwashers.
W. Slide spacer bushing onto end of jackshaft be-
fore installing driveline. This will insure proper space
will be maintained between the bearing and the drive-
line yoke.
X. Plumb hydraulic cylinders as shown in diagrams
on pages 24 and 25. Plugs are supplied to adapt
valve for either an open or closed center tractor
hydraulic system. Consult your tractor dealer to
determine which type system your tractor has.
Figure 5-15
Bearing
Lock Collar
& Set Screw
Spacer
Bushing
Mount Weldment
Figure 5-16
Lock Collar Bearing
FAILURE TO MATCH VALVE TO TRACTOR
HYDRAULIC SYSTEM BY USING INCOR-
RECT PLUG WILL CAUSE DAMAGE TO
TRACTOR.
AA. Fill each blade gearbox with 6 quarts (5.7L)
of EP80W-90 gearbox oil (Transfer gearbox has
2.75 quarts (2.6L) oil capacity). Allow time for oil
to seep through bearings into lower housing. Re-
place temporary plugs with permanent plugs sup-
plied in owner's manual package.
BB. On each clutch, loosen eight nuts retaining
clutch springs 1/3 turn or until spring can be
turned with fingers.
CC. With tractor at idle speed, engage tractor
PTO drive 2-3 seconds. Each clutch should slip
without turning blades.
DD. Retighten nuts to within 1/64" of original po-
sition. Initial spring length is 1.32" (33.6mm). (Fig-
ure 5-18)
Figure 5-18 SlipClutch
Spring Length
1.32"
(33.6mm)
20
Shield
Bearing
Housing
Spacer
Link
Figure 5-17
Punch
IMPORTANT
Spring
Length