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Maintenance Instructions REPLACING/REPAIRING
71
NOTE: With oil flow throughout the unitized
gear drive assembly; if one gearbox has internal
damage or excessive wear, the remaining gear-
boxes and connector tubes should be complete-
ly disassembled and thoroughly flushed out with
solvent before reassembly.
5. Drain and properly dispose of oil.
6. Remove the four (4) bolts mounting the gearbox
to the connector tube and slide the gearbox off
the splined drive shaft coupling.
7. Install the new gearbox on the spline coupling
of the drive shaft. Establish correct timing of
the blade drive gearboxes by setting flats on
the output shaft at 90 degrees when connecting
the gearbox(es) to the spline coupling. Make
sure the timing is correct before proceeding
with assembly.
8. Reinstall the four (4) bolts mounting the gearbox
to the connector tube but do not tighten them
at this time; leave connector tube bolts finger-
tight.
9. Position the gear drive assembly on the deck
and install the 3/8-16 bolts mounting the entire
assembly. Leave the mount bolts finger-tight.
10. Torque all the connector tube bolts to 80 in-lb
(9 N
⋅m); then tighten the deck mount bolts.
NOTE: This fastener tightening sequence aligns
the gearbox assembly with the deck housing and
eliminates the possibility of mounting the unitized
assembly in a bind.
11. Fill gearbox assembly with oil. Refer to Mower
Deck Gearbox Lubrication in this section for
instructions.
12. Reassemble remaining items onto deck to com-
plete installation. After installing blades, check
that the blade timing is correct by moving the
blades through one (1) complete revolution.
Make sure blade tips pass clear of each other.
Mower Deck Gearboxes
(Shown with Gearbox Cover Removed for Clarity)
GHS Blower Assembly (and/or Blower Wheel)
GHS Blower Assembly Removal
1. Remove the mower deck. Refer to
Deck Instal-
lation
in Assembly Instructions and reverse the
procedure to remove the deck.
Remove Skid Bar for
GHS Blower Removal
2. Remove the blower faceplate by removing six
(6) 1/4-20 nuts.
3. Remove the GHS blower drive belt. Refer to
REPLACING/REPAIRING the Drive Belts in
this section for instructions.
Mower Deck
Gearboxes
Connector Tubes
Skid Bar
Mounting Bolts
Blower Assembly
Skid Bar