Problem: 4Wd Will Not Engage; Problem: 4Wd Will Not Disengage; Troubleshooting - Cub Cadet 6X4 Shop Handbook

Troubleshooting:

Problem: 4WD will not engage

1. Check the minimum battery voltage going to the CFD Gearcase. The voltage should not read below 11 volts for the
unit to operate properly. If the voltage is at or above 11 volts, continue on to step #2.
2. Check the resistance of the coil harness on the large output cover. This can be achieved by attaching a multi-meter to
the (2) terminal pins (part #30 on the exploded view drawing located on page #5). The resistance should be 24.7 to
27.3 ohms (at 20°C/68°F). If the unit does not read any resistance, then there is a short in the coil & wire harness. The
large Output Cover Sub-Assembly (P/N 6203-9U-107) needs to be replaced. If the resistance in the coil is satisfactory,
continue on to step # 3.
3. Check the armature plate (part #37) for a consistent wear pattern. To do this, completely drain the oil from the unit by
removing the drain plug (part #43) located on the bottom of the gearcase with a 5/16" hex key wrench. Collect the oil
and dispose properly. Remove the (5) hex head bolts (part #4) from the large cover using a ½" socket. Set the unit on
a flat surface with the large output cover (part #17) facing up. Carefully lift the large cover straight up off of the
gearcase. Remove the clutch housing/ring gear (part #20) out of the gearcase (be sure to hold the roll cage with the
clutch housing/ring gear to prevent the cage from falling out). Remove the retaining ring (part #14) out of the large
cover and then remove the nylatron (plastic) shim (part #35). Pick up the armature plate and wipe off any dirt or
sludge. Inspect the surface that rides on the coil (part #38) located in the large output cover. There should be a
consistent wear mark from the coil. Any interruptions in this wear pattern could indicate an out of flatness condition
and the armature plate will need to be replaced (part #37). You can also check the flatness by setting the armature
plate (tangs facing up) on a flat surface or granite block and making sure the plate does not rock. If the armature plate
wear is consistent and the plate is flat, continue on to step #4.
4. Check for the proper coil depth. The electro-magnetic coil (part #38) should set below the pole faces of the metal
insert (steel u-shape piece pressed into the large cover assembly) located in the large output cover (part #17). To check
this, simply run your fingers around the pole faces and make sure that the coil is correctly set below the metal insert
along the entire circumference. If you feel the coil above the pole faces, replace the large output cover (P/N 6203-9U-
107). If the coil is fully below the pole faces, continue on to step #5.
5. Check that the torsion spring (part #28) is properly seated in the groove and notch of the clutch housing/ring gear (part
#20). If it is not, then wrap one spring arm so it sits against one side of the notch and the other spring arm so it sits on
the opposite side of the notch. Then check that the corresponding notches in the roll cage (part #22) line-up and accept
each spring arm when installed in the clutch housing. The torsion spring will be properly installed. If the spring is
properly installed continue to step #6.
6. Clean and inspect the internal clutch components. Slowly remove the roll cage (part #22) from the clutch housing/ring
gear (part #20). Using a clean, dry, lint-free cloth, clean the (14) clutch rollers (part #27), the (2) race/output hubs
(parts #25 & #26), and the internal profile in the clutch housing/ring gear (part #20). If there are any excessive
scratches, nicks or deep flats present on any of these parts, replace with the proper service kit listed at the bottom of
page 4.

Problem: 4WD will not disengage

1. Check the armature plate (part # 37) for a consistent wear pattern and flatness. To do this, completely drain the oil
from the unit by removing the drain plug (part #43) located on the bottom of the gearcase with a 5/16" hex key wrench.
Collect the oil and dispose properly. Remove the (5) hex head bolts (part #4) from the large cover using a ½" socket.
Set the unit on a flat surface with the large output cover (part #17) facing up. Carefully lift the large cover straight up
off of the gearcase. Remove the clutch housing/ring gear (part # 20) out of the gearcase (be sure to hold the roll cage
with the clutch housing/ring gear to prevent the cage from falling out). Remove the retaining ring (part #14) out of the
large cover and then remove the nylatron shim (part # 35). Pick up the armature plate and wipe off any dirt or sludge.
Inspect the surface that rides on the coil located in the large output cover. There should be a consistent wear mark
from the coil. Any interruptions in this wear pattern could indicate an out of flatness condition and the armature plate
will need to be replaced (part #37). You can also check the flatness by setting the armature plate (tangs facing up) on a
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