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Section 1: Assembly & Set-up
Refer to Figure 1-3:
1. Park tractor on a level surface. Slowly engage tractor
3-point lift lever to raise mower until gearbox shaft is
in line (level) with tractor PTO shaft.
2. Support mower deck at this height with support jacks
or blocks to keep mower from drifting down.
3. Place gear selector in park, set park brake, shut
tractor off and remove switch key.
4. Slide inner yoke (implement end) of driveline onto the
gearbox. Secure driveline with yoke locking device.
5. Slide outer yoke of driveline over the tractor PTO
shaft. Secure driveline with yoke locking device.
6. If driveline does not fit between tractor and gearbox,
skip to "Shorten Driveline Length" instructions below.
7. The driveline should now be moved back and forth to
insure both ends are secured to the tractor and
mower PTO shafts. Reattach any end that is loose.
IMPORTANT: Two small chains are supplied with
the driveline. To keep driveline shields from rotating,
these chains must be attached to the outer and inner
driveline shields and to the mower and tractor.
8. Hook driveline safety chain on the tractor end of
driveline to the tractor. Re-latch safety chain to the
driveline shield.
9. Hook driveline safety chain on the mower end of
driveline to the mower frame. Re-latch safety chain to
the driveline shield.
Check Driveline Collapsible Length
IMPORTANT: A driveline that is too long will bottom
out causing structural damage to the tractor and
mower. Always check driveline collapsible length
during initial setup and when connecting to a
different tractor. More than one driveline may be
required to fit all applications.
1. Make sure driveline is properly installed and level
before checking driveline collapsible length. (Refer to
"Driveline Installation" instructions if needed.)
Refer to Figure 1-3:
2. With driveline level, measure 1" ("B" dimension)
back from universal joint shield to end of outer
driveline shield. If measurement is 1" or more, skip
"Check Driveline Collapsible Length" instructions on
this page. If measurement is less than 1", then
shorten driveline using instructions provided below.
6/24/11
Table of Contents
Shorten Driveline Length
Refer to Figure 1-3:
1. Un-hook driveline from tractor PTO shaft and pull
outer and inner drivelines apart.
2. Reattach outer driveline to tractor PTO shaft. Pull on
inner and outer drivelines to be sure universal joints
are properly secured.
3. Hold inner and outer drivelines parallel to each other:
a. Measure 1" ("B" dimension) back from outer
driveline universal joint shield and make a mark at
this location on the inner driveline shield.
b. Measure 1" ("B" dimension) back from the inner
driveline universal joint shield and make a mark at
this location on the outer driveline shield.
4. Remove driveline from tractor and gearbox shafts.
5. Measure from end of inner shield to scribed mark
("X" dimension). Cut off inner shield at the mark. Cut
same amount off the inner shaft ("X1" dimension).
6. Measure from end of outer shield to scribed mark
("Y" dimension). Cut off outer shield at the mark. Cut
same amount off the outer shaft ("Y1" dimension).
7. Remove all burrs and cuttings.
8. Check drive line extend length next.
Driveline Shortening
Figure 1-3
FM3188 & FM4188 Flail Mowers 309-523M
22009
11
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