CONTROL GP-TRANSMISSION HYD 1124546 - Caterpillar

F8 Starting Motor (1) Battery terminal nut.(3) Battery terminal.(6) Solenoid.(8) Switch terminal nut.(11) Motor terminal nut.(12) Motor housing terminal nut.(13) Strap.(14) Shunt terminal nut.(15) Shunt lead.(17) Shift lever housing.(18) Plunger.(19) Shift lever.(20) Bolts.(21) Nuts.(22) Rear housing.(23) Motor housing.(24) Screws.(27) Brush holder terminals.(28) Brushes.(29) Brush holder.(30) Armature.(32) Drive housing.(33) Allen head bolts.(34) Bolts.(36) Shift lever pin.(37) Snap ring.(38) Pinion drive.(39) Armature shaft.(40)/callout>Stop collar. (41) O-ring seal.(42) Index pin.(43) Seal.(44) Motor housing terminal.(45) Brush springs.(46) O-ring seal.(49) Index pin.(50) Studs.Disassemble Starting Motor
The photographs in the Disassembly and Assembly section are of an F4 Current starting motor. However, the basic construction is the same for the F8, F4 Current and the F4 Earlier. Any differences are noted.Start By:a. remove starting motor. 1. Remove battery terminal nut (1) and washer. Disconnect battery lead (2) from battery terminal (3). Remove screw (4) and terminal cover (5). 2. For correct assembly, make a note of the wiring connections for solenoid (6) and start relay (7). Remove switch terminal nut (8) and lockwasher. Disconnect switch lead (9) from the switch terminal. Remove bolt (10) and start relay (7). 3. Remove motor terminal nut (11) and washer. Remove motor housing terminal nut (12) and washer. Remove strap (13) from the motor terminals.4. Remove shunt terminal nut (14). Disconnect shunt lead (15) from the shunt terminal.5. Remove two bolts (16). Remove solenoid (6) by: a. Pull solenoid (6) away from shift lever housing (17).b. Raise solenoid (6) so that plunger (18) unhooks from shift lever (19). 6. Remove two bolts (20) and two nuts (21). Remove rear housing (22) from motor housing (23). 7. Remove four screws (24) and lockwashers which fasten brush leads (25) and shunt lead (26) to brush holder terminals (27). 8. Remove brushes (28) by firmly pulling on brush leads (25). Remove brush holder (29) from armature (30). 9. For correct assembly, make scribe mark (31) on drive housing (32) and shift lever housing (17). Remove six allen head bolts (33). Separate drive housing (32) from shift lever housing (17). 10. Remove four bolts (34) and lockwashers. Separate motor housing (23) from shift lever housing (17) and armature (30). 11. Remove snap ring (35) from shift lever pin (36). Remove shift lever pin (36). 12. Snap ring (37), which is hidden, keeps pinion drive (38) on armature shaft (39). To expose snap ring (37); use a metal cylinder (such as a pipe coupling) to tap stop collar (40) towards pinion drive (38). 13. Using a snap ring expander, remove snap ring (37). Remove from armature (30): stop collar (40), pinion drive (38), shift lever (19) and shift lever housing (17).14. Inspect all parts for wear and damage.Assemble Starting Motor
The photographs in the Disassembly and Assembly section are of an F4 Current starting motor. However, the basic construction is the same for the F8, F4 Current and the F4 Earlier. Any differences are noted. Replace all O-rings and snap rings with new ones. Before assembly lubricate all bushings and pinion drive surfaces. During assembly