Kohler K91 Owner's Manual page 272

Bulletin No.
L
62
64
67
68
Date Issued
SERVICE BULLETIN RECORD
Topic or Part Involved
Hydrogear Bulletins
3165
4165
7165
9165
80
12166
Hydrogear - Transaxle Gasket Replacement
Hydrogear - Kit 6059, for use with Sickle Bar mower.
Hydrogear - Oil leak due to loose slide casting.
Hydrogear - Kit 6066, for correcting oil leak at cam block
trunnion support casting or serial number plate.
Hydrogear - Transmission/Transaxle usage and interchangeability
1967 and prior.
83 l/67
84 2167
Hydrogear - New relief valve spring 7264; relates to tiller
installation on earlier units.
Hydrogear - Oil and filter change recommendation. (Note
Dexron II is present equivalent to Type A Automatic
Transmission fluid).
101
118
437
'L
7168
Hydrogear - Replacement unit installation information.
12169 Hydrogear - Securing hydraulic valve hoses.
3189
Hydrogear - Sundstrand rebuilding service.
Piston - Piston Bulletins
172
4175
174 5175
195
12176
Piston-Piston - Use of rust preventative on axles.
Piston-Piston - Differential bolt diameter change.
Piston-Piston - Motor snap ring failure, 1975 and prior tractors;
S/A 105124
217 2178
252 1 l/79
273
5180
305 4181
Piston-Piston - Driven coupling installation on D-Series tractors,
1977 and prior:
S/A
105147. Also see SB 305.
Piston-Piston - Conversion of limited slip to S-pinion differential,
1968-73 tractors;
S/A
1051731Gear 101523.
Piston-Piston - Differential end cap nut 108881.
Piston-Piston - Driven coupling repair procedure, D-Series
tractors.
437 3189 Piston-Piston - Sundstrand rebuilding service.
NOTE:
Service Bulletin information is for repair reference purposes. Parts and
assemblies covered by bulletin may no longer be available. Warranty coverage
has expired for all Sundstrand-equipped products. L