MAINTENANCE
MAINTENANCE
RIGHT ANGLE GEARBOX ASSEMBLY & DISASSEMBLY PROCEDURES
Refer to Figure
REMOVE INPUT SHAFT
1.Place gearbox on appropriate work surface. Remove bolts retaining top cover plate.
2.Drive sharp object (screwdriver) through seal #9 and force out of housing. Repeat procedure for back cap #23.
3.Remove retaining rings #8 from both sides of gearbox. NOTE location of shims between bearing and retaining ring and mark for later reinstallation.
4.Remove shaft from housing by pressing on end of shaft. Bearing cone #6 and gear #5 will remain in housing. Remove by lifting out. Press cone off rear end of shaft.
OUTPUT SHAFT REMOVAL
1.Remove protective shield # 16 by prying out. Remove bottom seal # 15 using same procedure as in step 2 under input shaft.
2.Remove cotter pin # 17 and slotted nut # 11 from to end of output shaft.
3.Using long punch or bar inserted through top press shaft # 18 out bottom end.
4.Remove gear # 12 shim # 13 and bearing cone #14 from main housing. Note and mark shims # 13 so they may be reused during assembly.
5.Using lon punch or bar press bearing cup # 14 from main housing at ouput and top. Press bearing cone from lower end of shaft #18.
ASSEMBLY PROCEDURE
Reassemble gearbox in reverse order that it was disassembled
OUTPUT SHAFT PRELOADING SETTING
Tighten nut on top of shaft using 2 3/16 or 55 mm socket. Using hammer tap both ends of shaft to seat parts and then check preload. Rolling torque should be 10 to 15 inch pounds. Adjust nut to reach setting.
TOP INPUT SHAFT PRELOAD SETTING
1.Press bearing cup # 6 into housing. Install gear adjusting shims # 1 on input side of gearbox if any were present at disassembly. Install retaining ring # 8
2.Drop gear # 5 and bearing cone # 6 into place in gear box. Insert shaft # 10 through gear # 5 and bearing #6 as far as possible. Press ball bearing # 22 as far as possible on back side of gear box. Install preload adjusting shims # 1 against bearing and install retaining ring # 8 Note: if end play is present in shaft additional shims or a thicker shim must be added at rear to just remove end play or minimal preload.
3.Check gear backlash. Backlash should always be present and should be between .005 and .012 inches. If not then shims # 1 must be exchanged between input and rear sides of gearbox. To increase backlash place a thinner shim on input side and thicker shim at rear. To decrease backlash reverse procedure.
4.Press in all seals and caps and install top cover plate.
SX15 01/09 | Maintenance Section |
© 2009 Alamo Group Inc.
