A small collection of service manual scans:
General lubrication chart
3-roller undercarriage maintenance
3-roller lubrication
4 & 5-roller maintenance
4 & 5-roller lubrication
Engine specifications: page 1, page 2, page 3
Electrical schematic
Setting track tension
Remember that a lot of the lubricants specified were from the 1950's and may not be appropriate today with modern oil/grease advancements.
John Deere 40C-specific Maintenance information
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