MBW GPR160 - Manual (Page 14)

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Baseplate Disassembly Procedure
Reference the Main Disassembly Procedure listed
earlier in this section, to separate the engine deck
from the baseplate.
Refer to Main Assembly, page 20.
1. Remove the twelve hex head flange screws (#21)
securing the side covers (#8) to the baseplate.
2. Remove the four hex head flange screws (#22)
securing the bellows mounts (#10) to the baseplate
and remove the bellows mounts and bellows (#3).
3. Disconnect the hydraulic line (#16) from the hydraulic
fitting and cap to prevent contamination.
4. Remove the four hex head flange screws (#21)
securing the hydraulic guard (#9) to the baseplate
and remove the hydraulic guard and hydraulic line
from the baseplate.
Refer to Baseplate Assembly, page 22.
5. Remove the four socked head capscrews (#29),
extension plates (#18) and bushings (#19) from the
sides of baseplate (#15)
6. Remove the hex head flange screw (#24) and washer
(#14) securing the pulley (#20) to the input shaft (#16)
and remove the pulley.
7. Remove the twenty hex head flange screws (#24)
securing the baseplate cover (#13) to the baseplate
(#15) and remove the baseplate cover.
8. Remove the oil drain plug (#28) and completely drain
the exciter oil into a drain pan. Examine the oil for
metal chips as a precaution to future troubles.
9. Note the position of the gear timing marks.
10. Remove the socket head capscrews (#27) securing
the exciter weights (#21) to the shafts and remove the
exciter weights.
Refer to Lower Shaft Assembly, page 24.
11. Place a shop rag under the hydraulic housing (#16)
to catch the oil and remove the four flange screws
(#22) securing the cylinder mount plate (#20) to the
input shaft cover (#12) and remove the hydraulic
housing (#16) from the baseplate.
12. Remove the shift spool (#15) from the shift shaft (#10)
by sliding the shift spool out of the baseplate and
holding it secure while unthreading the shift spool.
NOTE: This connection is left hand thread.
Refer to Baseplate Assembly, page 22.
13. Remove the plastic plugs (#1) from the threaded
holes in the shaft covers (#7, #9, & #17). This can be
done using a #2 phillips screwdriver lightly tapped
into the center of the plug and unthreading it as a
screw.
14. Clean all dirt from the threaded holes in the shaft
covers which were not plugged and “chase” the
threads with a 5/16-18 UNC thread tap.
15. Remove the covers from the idler shaft (#8) end of
the baseplate by removing the flange screws (#25)
and using two 5/16-18 x 2” long screws to press off
the covers by installing them into the threaded holes
cleaned in the previous steps. Turn both screws
evenly to prevent binding of the cover in the bore.
16. Note: Make sure the bearings and their inner
races are kept as a matched set.
17. Remove the idler shaft (#8) and idler gear (#11) from
the baseplate.
18. Press the inner bearing races from the ends of the
idler shaft (#8).
19. Press the idler gear (#11) off the idler shaft (#8) and
remove the key. (#12). If you are not replacing the
gear or shaft skip this step.
20. Repeat steps 16 and 17 for the input shaft covers.
21. Remove the input shaft (#16) as an assembly from
the baseplate.
22. Slide the input gear (#10) to one end of the input shaft
and remove the helix pin (page 22, #11) from the
input shaft and slide out the helix pin carrier (page 24,
#9) as a subassembly.
23. Press the inner bearing races from the ends of the
input shaft (#16).
24. Slide the input gear (#10) off of the input shaft (#16).
25. Remove the roller bearings (#4) from the shaft covers
(#7, #9 & #17) by removing two 5/16” hex head bolts
(#23) and washers (#25) from the covers and use a
1/4” x 2” long pin punch to “tap” the bearings out of
the covers. Alternate between the access holes
evenly to prevent binding of the bearings in the
covers.
Refer to Lower Shaft Assembly, page 24.





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