Service
Lifting Tiller
Model 647 has a clevis attached to the gearbox for lifting.
Service Intervals
IMPORTANT: Avoid damage! If tiller is operated in extreme heat, dust, or other severe conditions, service functions may need to be performed more often than shown below. |
Every 8 Hours
• Grease PTO driveline U-joints.
• Grease PTO driveline shield.
Every 50 Hours
• Tighten all screws and bolts.
Every 500 Hours
Grease
The following greases are preferred:
• John Deere Multi-Purpose SD Polyurea Grease
• John Deere Multi-Purpose HD Lithium Complex Grease
If not using any of the preferred greases, be sure to use a general all-purpose grease with an NLGI grade No.2 rating.
Wet or high speed conditions may require use of a special-use grease. Contact your Servicing dealer for information.
Lubricating
PTO Driveline
• Lubricate grease fitting (A) on U-joints at both ends.
• Lubricate shield grease fitting (B) at both ends.
• Separate driveline and apply grease to inner shaft.
Rotor Bearing
1. Lubricate grease fitting (A).
Gear Oil
Use oil viscosity based on the expected air temperature range during the period between oil changes.
John Deere GL-5 Gear Lubricant is recommended.
Other oils may be used if they meet one or more of the following:
• API Service Classification GL-5.
• Military Specification MIL-L-2105D.
• Military Specification MIL-L-2105C.
• Military Specification MIL-L-2105B.
Oils meeting Military Specification MIL-L-10324A may be used as arctic oils.
Checking and Changing Gearbox Oil
IMPORTANT: Avoid damage! Clean area around plugs before removing to prevent dirt and other contaminants from entering oil reservoir. |
NOTE: Be sure top of tiller is level before checking and changing oil.
a. Remove check plug (A) on top of gear box. Add gear oil until visible on the dipstick.
b. Install and tighten check plug to 25 N•m (17.5 lb-ft).
a. Remove tiller from machine.
b. Locate and remove drain plug from bottom of gearbox.
d. Install and tighten drain plug to 25 N•m (17.5 lb-ft). Install PTO driveline and guard if removed.
e. Remove check plug (A) on top of gear box.
f. Add gear oil until visible on the dipstick.
g. Install and tighten check plug to 25 N•m (17.5 lb-ft).
Checking and Changing Chaincase Oil
IMPORTANT: Avoid damage! Clean area around plugs before removing to prevent dirt and other contaminants from entering oil reservoir. |
NOTE: Be sure top of tiller is level before checking and changing oil.
a. Locate check plug (A) on chaincase. Oil should be seen in check plug.
c. Add gear oil until seen in check plug.
d. Install and tighten fill plug to 25 N•m (17.5 lb-ft).
NOTE: Gasket must be replaced when chaincase cover is removed.
b. Loosen chaincase cover bolts to drain oil.
c. Remove cover and replace gasket.
d. Install cover and tighten bolts.
e. Add gear oil until seen in check plug.
f. Install and tighten fill plug to 25 N•m (17.5 lb-ft).
Replacing Tines
c CAUTION: Avoid injury! Wear heavy gloves when handling tines.
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1. Block tiller in raised position.
2. Stand facing tiller rear to identify tines:
• Left-hand tine (A) curves to the left when the cutting edge is forward.
• Right-hand tine (B) curves to the right when the cutting edge is forward.
NOTE: When replacing tines, note tine and hardware positions before removal. Remove one tine and install replacement before proceeding to the next tine. This will ensure the pattern and hardware configuration is maintained.