John Deere Tractor Repair Manual Series A, B, G, H - Models D, M, MT
The John Deere Tractor Repair Manual Series A, B, G, H - Models D, M, MT covers tractor models indicated:
Series A (Serial No. 499000 and up)
Series B (Serial No. 96000 and up)
Series G (Serial No. 13000 and up)
Series H
Models D (Serial No. 143800 and up)
Series M, MT
Note: This tractor repair manual does NOT include wiring diagrams.
Book Excerpt: John Deere Tractor Repair Manual Series A, B, G, H - Models D, M, MT
CRANKSHAFT AND MAIN BEARINGS: SERIES A-B-G
On series A (prior to 694828), B and G (prior to 63384), the split type main bearing shells are carried in main bearing housings and shims are provided for adjustment.
On series A (after 694827) and G (after 63383), main bearing bushings are of the aluminum alloy sleeve type which are pressed into the main bearing housings.
Main bearing bushings are not available as individual parts, but as a unit with the main bearing housings, on a factory exchange basis. The exchange main bearing and housing units are pre-sized.
Field installation of the sleeve type bearing and housing units can be made on early production A tractors, providing the crankshaft is not excessively worn.
102. LEFT MAIN BEARING ? ADJUST. To adjust the left main bearing on series A (prior to 694828), B and G, remove flywheel as outlined in paragraph 110. Remove left main bearing cover (2-Fig. JD50).
Punch mark the flywheel spacer and crankshaft to provide an index mark for correct installation and remove flywheel spacer (3).
Remove pipe plugs (5) from main bearing housing.
Remove main bearing adjusting bolts (6) and various number of shims (9) to obtain not less than 0.002 and not more than 0.006 clearance.
An accurate and fast method of determining the running clearance is by the use of Plastigage clearance measuring threads.
When reassembling, do not tighten the bearing adjusting bolts until after shims have been positioned against crankshaft.
Renew seal (4) in flywheel spacer (refer to paragraph 109) and reassemble balance of parts by reversing the disassembly procedure making certain that the main bearing housing is centered about the crankshaft.
TABLE of CONTENTS:
Detailed illustrations and exploded views
Troubleshooting sections covering most models
Brakes
Cooling system
Differential
Electrical system
Engine
Final drive
Axles
Hydraulics
Transmission
Condensed service data information
Detailed index
Plus...
Accurate information in a concise, easy-to-use format
Durable, coated paper stands up to messy shop jobs
