Cub Cadet 2000 Series Professional Shop Manual page 70

2000 Series Tractors
Symptom
Complete loss of
drive
Loss of drive in For-
ward only
64
Root problem
Loss of control input
Loss of power to
hydro pump
Loss of hydraulic
pressure
Mechanical drive fail-
ure
Loss of hydraulic
pressure in forward
circuit
Mechanical cause
Inoperative pedal linkage or
control arm not moving trun-
nion shaft
Drive shaft and couplings to
engine and Transmission
Sheared input shaft at hydro
pump
Bypass valve open
Low/no hydraulic fluid
Restricted flow to charge
pump
Failed charge relief valve
Failed charge pump
2 completely inoperative
charge check valves (very
unlikely scenario)
Pinion gear/bevel gear failure
Ring gear, differential, or axle
failure
Wheel hub not driven by axle
Completely inoperative
charge relief valve
Recommended action
Visually inspect linkage and
force-check the control arm/
trunnion connection.
Inspect and force -check drive
shaft and coupling. May require
drive shaft removal.
Remove drive shaft and force-
check input shaft (push/pull/
turn). May need to remove
charge pump cover to confirm
shaft rotation.
Check position of bypass con-
trol rod. Check for proper move-
ment of the linkage and valve
plunger.
Check the transmission's dip-
stick
Check external parts: pick-up
tube, fluid filter (Cub Cadet P/N
723-3014). NOTE: fluid & filter
replacement is a reasonable
first step
Remove and inspect charge
relief valve.
Remove charge pump cover for
physical inspection
Remove and inspect charge
valves.
The brake rotor is on the same
shaft that carries the bevel
gear. If the brake rotor turns in
response to drive inputs, but the
wheels do not, the problem is
down-stream of the bevel gear
See cell above
Inspect and force-check wheel
hub
Remove and inspect charge
check valves.