3.07 - Constant Velocity Driveline
It is extremely important that the Constant Velocity Driveline be at the correct length in
relation to the tractor on which it is to be used. The driveline length might be too long for
certain tractors whose tires allow for a very sharp turning radius. The proper length is
one which allows for a maximum of overlap without the possibility of bottoming out on
tight turns.
The bottoming out of the driveline can seriously damage the tractor
PTO and/or the mower drive transmission.
We recommend the following method for
determining the proper length. On the tightest turn possible (the tractor tires rubbing the
frame tongue) the driveline should be at least ½”-1” from bottoming out. Keep in mind
that the Constant Velocity Driveline is rated at a maximum of 80 degrees turning radius.
Towing a mower this size, most tractors cannot turn this sharply.
The following are instructions to prevent the possibility of bottoming out the driveline
and causing damage to the tractor or the mower:
1. Separate the two driveline halves. Connect the half with the CV joint to the tractor
PTO
and the other half to the mower input shaft.
2. Hook the tractor to the mower and turn the tractor in the tightest possible turn. Hold
the half shafts side by side and mark the desired length on the outer female guard
tube leaving a ½”-1” gap between the end of the guard tube and bell guard.
3. Cut off both guard tubes the same amount as marked. Shorten both drive tubes the
same amount as guard tubes.
4. De-burr and clean filings from the drive tubes and apply grease to the inside of the
outer telescoping tube.
5. Re-measure as described in step 2. Straighten out the tractor and measure the two
driveline halves to be sure that there is a minimum of 4”-6” shaft overlap to prevent
the driveline from separating during normal operation.
3.08 - Hydraulic Lift System
Standard single action lift cylinders are used on the Flex frame. They come with in-line
restrictors to prevent a sudden drop if the hydraulics fail.
DANGER: Never use hydraulics without the restrictors installed.
For correct operation, the lift cylinders for all three mowers must be completely
extended and relieved of pressure. This is done by assuring the tractor hydraulic remote
system is in the float position. See your tractor operator’s manual for correct procedure
on how to operate single action hydraulic cylinders and most importantly on how to hold
the tractor remote supply in “Float”.
The “Float” setting is critical for the proper
function of the Flex mower.
Both wing mowers and rear mower must have free up and
down movement for correct operation on uneven terrain.
O
PERATION
21
BEFCO
C
YCLONE
S
UPER
-F
LEX
O
PERATOR
’
S
M
ANUAL
