MCi Crusader II 1989 Maintenance Manual page 213

Date
1-1-89
Page·_. __
s_-1_4 _ _
MC-9 MAINTENANCE MANUAL
REMOVAL.
The blower gear box and blowers may tie removed through
the blower compartment door. Remove the drive belt, as out-
lined under Blower Belt Air Cylinder - Removal, and proceed as
follows:
1.
Remove the cap screws that secure the blower housings
to the blower compartment floor.
2. Remove the capscrews that secure the blower gear box to
the blower saddle.
NOTE: Two shims are used to align the
gear box. When removing the gear box and
blower housings, take care not to lose the
shims.
3. Remove. the gear bo;ic and blower housing assembly.
INSTALLATION OF BLOWER GEAR BOX
RUBBER MOUNTS
To properly insert the blower gear box rubber mounts into
the blower saddle, only water should be used as a lubricant.
Insertion of the rubber mounts using glycerine. or any other
lubricant. will result in the tail of the mounts flaring out causing
the rubber to rupture.
Using water as a lubricant will allow the tail of the mount to
go into compression when the assembly is drawn up tight.
giving the proper displacement bulge arourd the entire rubber
mount.
Ir. no case should a lubricant be used which maintains
lubricity after assembly and engine start-up.
DISASSEMBLY
1.
Remove four screws holding down top cover and remove
cover and gasket
2. Remove screws and output shaft covers.
3. Remove the capscrews that fasten the bearing carrier to
the housing. The bearing carriers. input shaft. bearings and
gears will then come out as a unit.
To disassemble input shaft assembly, remove retaining ring
from the inner end at the bevel gear. Pull the gear from the shaft.
The bearipgs and spacer can now be removed from the shaft.
Using a sott mallet. tao the output shaft out of the housing. The
tapered roller bearings and bevel gear will come out with the
shaft. Pull or tap off the bearing cones. slide off the spacers and
pull or press off the bevel gear.
Reassembly is the reverse of disassembly. When cover
gasket 1s not available. seal the cover and body with Permatex
Silicone Sealant.
REPAIR AND ASSEMBLY
The gears are only supplied in matched. honed sets and
must be installed so that the timing marks on the back of the
gears are aligned proµerly.
The back edges oLthe miter gears must be flush when
installed. This can be accomplished by using the proper
number of brass shim gaskets under the output shaft bearing
caps. Refer to figures 6-19 and 6-20.
The tapered roller bearings must be adjusted by means of
brass shim washers so that there is no perceptible play or
clearance in them.
Backlash of the spiral bevel gears is also controlled by the
use of brass shims between the bearing carrier and the main
housing; .003 to .004" (.076 - .101 mm) clearance
+
.002"
(.050 mm) is recommended between gear teeth.
Care must be exercised when installing the shaft seals over
trie sharp keyways in the shafts. To avoid nicking the inner
sealing lip. a thin tapered bushing should be made up to facili-
tate entry of the shaft in the seal and protect the seal while it is
being slid over the keyways.
1
27. 2
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1. Housing
2. lnlel Ring
3.
BIOWff
Whe.i
4. Adjusting Plale
5. Capscrew
6. Flat Wasner
7. Lock Nul
8. Capscrew
9.
Lock Waaher
10. Nut
11. Uniball End - Female
12. Unib.111 End • Mate
13. Tube & Bracket Assy.
14. Busriing
15. Seal
16. Lever
17. Shall
18. Grease Filling
19. Lock Washer
20. Wasti.r
21. Capsc:rew
22. Lock Wnher
23. Mounting Plale
24. Sight
Gauge
Tee
25. Sight
Gauge
26. Oil Filler Cup
27. Cap Assembly
28. Clamp
29. Male Connector
30. Male Elbow
31. Blower Gear Box Asay.
32. Block
33. Saddle
34. Breckel
35. Rubber Mount
36.
Air Cylinder
37. Brackel
38. Pulley
"39.
Dam.,.,
Air Cylinder
Any.
• 40. Tapping
Ptale
"41. Mounting Brackel SIA
•42. Bracket - Trunnion (W' DiL Hole)
•43_ Brac:ket - Trunnion ('I.'' Dia. Hole)
"44. PIiiow
•45_ Clevis
"46. Jam Nut
•47_ Lev..,
Auy.
• 48. Beating
•49_ Beating
·so.
Shoulder Boll
"51. "?"•Link
•52. Beating
• With Optional Blower Dampers
Figure 6--19. Blower Gear Box and Air Cylinder Linkage.