Greensmaster Flex 21 Traction and Reel Drive System (Rev. C)Page 4 – 23
Change Gearbox Fluid
The gearbox fluid should be changed after the first 50
hours of operation and every 2 years of operation there-
after.
1. Park mower with engine OFF. Remove high tension
lead from the spark plug.
2. Place a drain pan at the rear of the mower.
3. Remove the drain plug from the rear of the gearbox
assembly (Fig. 30).
4. Push down on the handle and tip the machine back.
Remove the check/fill plug with O–ring from the right
side of the gearbox (Fig. 30).
5. Allow the gearbox fluid to drain completely. When
drained, install drain plug. Torque drain plug from 85 to
105 in–lb (97 to 124 kg–cm).
6. Make sure that mower is on its traction drum on a lev-
el surface.
IMPORTANT: Use only the type of fluid specified.
Other fluid types can cause gearbox damage or per-
formance problems.
7. Fill the gearbox with approximately 2.9 qt (2.78 l) of
the proper fluid (Dexron III Automatic Transmission
Fluid or equivalent) until the level reaches the bottom of
the check/fill hole (see Check Gearbox Fluid).
8. Install the check/fill plug with O–ring and torque plug
to 240 in–lb (276 kg–cm).
1. Gearbox assembly
2. Drain plug
3. Check/fill plug
Figure 30
3
240 in–lb
(276 kg–cm)
85 to 105 in–lb
(97 to 124 kg–cm)
1
2
Traction and Reel
Drive System
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