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Heavy Duty Finishing Mower
13
MAINTENANCE
HEAVY DUTY FINISHING MOWER PTO SHAFTS
MAINTENANCE: The cross journals and the shield bearings at both ends of the shaft
should be greased every 8 hours. Use 1 or 2 pumps of high temperature grease. The
cones on the outer PTO shield must be turned until the access holes line up with the
grease nipple in the cross journals. The grease nipple for the shield bearings is on the
bottom edge of the cone. The PTO shaft must be pulled apart to grease the cardan
tubes. Put about 4 pumps of grease into the female or larger outer tube. Slide the two
halves back together. The quick release collars on the ends of the PTO shaft should
also be kept lubricated. The cardan tubes and the release collars should be greased
about every 20 hours. Clean all grease fittings before injecting grease and immediately
replace any damaged or missing grease fittings.
SERVICE: The two major service areas on the mower PTO shafts are the shielding
and the cross journals. The outer guards are held on by a nylon shield bearing. The
three round white tabs at the bottom edge of the shield cones must all be pushed in to
pull the shield off the cardan yoke and tube assembly. To replace the outer guards, first
fit the nylon shield bearing into the groove machined into the yoke. Slide on the outer
guard till it snaps in. The tabs on the shield bearing must line up with grooves on the
inside of the outer guard.
The cross journals must be removed using a press or a vise. Do not use a hammer.
Cross journal replacement is done with the outer shield removed. Remove the snap
rings at the ends of the cross journal before pressing out. The cups on the ends of the
cross journal contain numerous needle bearings. If even one of these needle bearings
falls over, you will not be able to assemble the cross journal. Check that the end yoke
turns freely after replacing a cross journal. Adjust the spread on the end yoke if
necessary to loosen up the turning.
The quick release collars on the ends of the PTO shaft are held on by a snap ring. A
pin and spring are inside the collar. Repair immediately if the collar fails to hold the PTO
shaft solidly in place.