Changing Gear Box Lubricant - Toro 30373 Operator's Manual

A. Remove hairpin cotter and clevis pin securing latch
cover to lift arm (Fig. 24).
B. Pivot release lever upward (Fig. 24).
C. Slide cutting unit lift arm onto traction unit lift
arm, inserting shaft latch into slot in traction unit
lift arm (Fig. 24).
Note: If latch does not fall into slot in traction unit lift
arm, raise or lower lift arm casting by pushing up or down
from behind the front tires.
D. Pivot release lever downward and tighten securely
by rotating clockwise (Fig. 24).
7. Install other lift arm on tractor by rotating deck
towards tractor, aligning lift arm to tractor arm and
repeating step 5. If latch does not fall into slot in
traction unit lift arm the arms are not lined up.
A. If lift arms on traction unit are not at the correct
height for deck arms to slide on, push up or down
on lift arm castings from behind the front tires until
deck arm lines up and slides on.
B. If lift arms on deck do not line up side to side.
Rotate castor wheels side ways so deck moves side
to side easier. Move deck side to side until lift arms
line up and slide on.
8. Move deck from side to side to check for tightness and
re–tighten latches, if required.
9. Install latch covers to lift arms and secure with clevis
pins and hairpin cotters (Fig. 24).
10. Connect drive shaft to traction unit.
11. Close needle valve (Fig. 23) and lower seat.
12. Start tractor and raise deck to highest possible position
and turn off engine.
13. Align height-of-cut chains with hole for desired
height-of-cut, install clevis pin, and secure with
hairpin cotter.

Changing Gear Box Lubricant

The gear box lubricant must be changed initially, after the
first 400 hours of operation, and thereafter every 1600
hours of operation.
1. Position the machine and cutting unit on a level
surface.
2. Loosen 2 nuts securing the idler plate and rotate the
arm counterclockwise to remove belt tension.
3. Remove 4 locknuts securing gearbox mount plate to
deck.
4. Remove belt from pulley.
5. Remove drain plug from end of gear box (Fig. 25) and
tip gear box assembly allowing lubricant to drain from
gear box.
Figure 25
1. Fill plug
2. Check plug
6. Reinstall belt to pulley.
7. Reinstall gear box assembly to deck
8. Remove fill plug on end of gear case and check plug
from side of gear case. Add SAE 80–90 EP gear lube
until level is up to bottom of hole in side.
9. Reinstall check plug to side of gear box and fill plug to
end of gear case.
10. Re–tension belt; refer to Replacing Drive Belt,
page 15.
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3. Drain plug