Grizzly G9901 Owner's Manual page 57

13. With assistance, pull the upper transmission
case off the mill.
14. Remove the four remaining cap screws from
under the lower transmission case.
Note: If necessary, replace the brake shoes
before replacing the belts. Refer to Replacing
Brake Shoes G9903 on Page 57 for detailed
instructions.
15. Place a new ribbed timing belt around the
pulley (see Figure 84), then slide the lower
transmission cover into place.
Figure 84. Ribbed timing belt.
16. Place a new variable speed belt around the
pulley, as shown in Figure 85.
Figure 85. Variable speed belt.
Model G9901/G9902/G9903 Milling Machine
17. Carefully compress the spring between the
lower pulley and the spring retaining plate
with an arbor press.
18. Thread two M6-1 x 60 bolts through the
retaining spring plate and into the lower pul-
ley to secure the spring.
19. Install the upper transmission case, and
place the lower pulley assembly under the
variable speed belt.
20. Slide the motor drive shaft into the lower pul-
ley, and secure the motor to the transmission
case.
21. Rotate the variable speed handwheel to
lower the retaining spring plate under the
upper spindle bearing.
22. Replace the Phillips head screws removed in
Step 10.
23. Replace the remaining parts in the reverse
order they were removed.
Note: Be sure to remove the two M6-1 x 60
bolts after securing the retaining spring plate
hex nut.
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