Model 30 Pavement Router Manual
Maintenance Instructions
Chapter 6
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6.8 Changing Cutter Heads
It is recommended that the cutter head be changed when holes for pins are worn to 1.000 in
diameter or larger. Follow the steps in
Table 6-5 to remove the cutter head and main shaft, and
Table 6-6 to install the new cutter head and main shaft. The cutter head and main shaft are sold in
matched sets and must be installed together.
Table 6-5 Removing Old Cutter Head and Main Shaft
Step
Action
1
Remove belt guard. (
2
Back off belt tension, adjusting bolt jam nuts all the way and remove the V-belts. (
3
Tip the router back, lowering handle all the way to the ground.
4
Remove wheels.
5
Remove lower sheave. The sheave has a built in puller. Loosen and remove the three
mounting cap screws. Insert these same cap screws in the threaded jack-screw holes.
Starting with the screw farthest from the bushing saw slot; tighten all screws alternately
and progressively to separate sheave from bushing.
6
Drive a wedge into the slot of bushing, barely enough to free the bushing and slide
bushing off shaft.
7
Lift handle to set machine flat on ground, and then remove top three cap screws in each
of the two main shaft bearings. It is not necessary to remove bottom cap screw in each
bearing but leave it intact.
8
Push handle down all the way to the ground again, this will lift the front of the router,
freeing the cutter head assembly from the cutter housing. Then roll the cutter head from
under the router.
Figure 6.6 Belt Tensioner