Minor Repair/General Information; Plug/Fitting Torques; Shaft Seals; Charge Check Valves - Cub Cadet 3000 Series Service Manual

Cub Cadet 3000
MINOR REPAIR
GENERAL INFORMATION
Minor repairs may be performed, following the
procedures in this section, without voiding the unit
warranty.
Cleanliness is a primary means of assuring satisfacto-
ry life on either new or repaired units. Cleaning parts
by using a clean solvent wash and air drying is
usually adequate. As with any precision equipment,
all parts must be kept free of foreign materials and
chemicals.
Protect all exposed sealing surfaces and open
cavities from damage and foreign material. The outer
surfaces must be cleaned before beginning any
repairs.
It is recommended that all O-rings and seals be
replaced. Lightly lubricate all O-rings and seals with a
clean petroleum jelly prior to assembly.

PLUG/FITTING TORQUES

If any plugs were removed during servicing, they
should be torqued as indicated in the accompanying
table:

SHAFT SEALS

Lip type seals are used on the input shaft, pump
through shaft (not all models use the through shaft),
motor output shaft and displacement control shaft.
These seals can be replaced without major
disassembly of the unit. However, replacement of the
seals generally requires removal of the transmission
from the machine.
To replace the pump input shaft seal, first remove the
retaining ring from the housing.
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Carefully pull the seal out of the housing bore. A
"hook" type tool may be used to grasp the seal and
pull it out, or a slide hammer type puller may be used
to remove the seal. Care must be taken so as not to
damage the housing bore, shaft sealing surface, or
bearing. Once removed, the seal is not reusable.
Inspect the sealing area on the shaft for rust, wear, or
contamination. Polish the sealing area on the shaft if
necessary.
Wrap the spline or keyed end of the shaft with a thin
plastic or cellophane to prevent damage to the seal lip
during installation.
Lubricate the new seal with petroleum jelly and slide
the seal over the shaft and press it into the housing
bore. Be careful not to damage the seal.
Install the retaining ring in the housing.
The pump through shaft, motor output shaft and dis-
placement control shaft may be replaced following a
similar procedure as outlined for the pump input shaft
seal. These seals are not held in position by a retain-
ing ring.

CHARGE CHECK VALVES

Remove the check valve plug with a 1/4" internal hex
wrench.
Remove the check valve spring and check ball (or
poppet) from the center section.
CAUTION: Do not allow the check ball to fall into
the closed loop passages in the center section.
Removal may be difficult but can be accom-
plished with a magnet, or by removing the plug
from the end of the center section. Do not allow
contaminants to be introduced to the system.
Inspect the check balls (or poppets) and mating seats
in the center section for damage or foreign material.
Position the transmission so that the check valve port
will be in the upright position (as shown) and install
the check ball (or poppet), spring and plug (with
o-ring) into the center section. Make sure the plug
stem is properly positioned into the poppet or damage
and failure will occur. Be certain the check ball does
not fall into the closed loop passage.
Torque the plug to 15-35 ft. lbs.
Turn the unit over and repeat the procedure for the
other side.
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