Brouwer 1570, Operator'S Manual

Page: 60 / 66

SERVICE
Cutter Drive: To Replace Connecting Rods or
Crankshaft
Refer to illustration on page 5-04. Also refer to parts
manual for a complete parts breakdown and part
numbers.
1. Raise the cutting head with the conveyor lift, and
install the cylinder lock as described on page 5-01.
2. Loosen the three locknuts (Ref. 1) on the cutter
drive motor and remove the cover (Ref. 2) on the
opposite side of the housing. Back off the
tensioning bolt nut (Ref. 3) to the end of the
thread.
3. Remove the bolts from the nearest pillow block
bearing (Ref. 4) which supports the crankshaft.
4. Remove the bolts and caps from the connecting
rods (Ref. 5).
5. The cutting blade arms will now swing forward and
the V belt can be removed from the drive motor
pulley, and then from the crankshaft pulley and
related parts.
6. Remove the bolts from the other pillow block which
supports the crankshaft (Ref. 7). Take care that
the crankshaft, pillow blocks and connecting rod
assembly does not drop or pinch your hands.
7. The crankshaft, pillow blocks and connecting rod
assembly will now drop down into the conveyor
mat, and can be slid up the conveyor for removal.
8. The bearing in the end of the connecting rod is a
press fit in the connecting rod, and a press fit on
the crankshaft. However over time, the bearing is
usually “frozen” on the crankshaft journal, and may
require a gear puller for removal. Remove the
retaining bolt from the journal, and use a gear
puller to remove the complete connecting rod from
the crankshaft. Using an old nut, or similar object
on the end of the journal, will prevent damage to
the threads by the gear puller. The new bearing
will be a press fit on the journal.
9. The bearings in the end of the connecting rod are
replaceable. Remove the clip rings for both sides
of the rod end, and using a gear puller or suitable
arbor press remove the bearings. Replace one clip
ring and press the bearings in using a suitable
plate or punch to only exert pressure on the outer
race, to avoid damage to the bearing. Do not over
press or damage may occur to the clip ring or
groove. Install the second clip ring and the
connecting rod is ready for service.
5-05
10. The pillow block bearings can be removed
from the crankshaft by loosening the lock
collars. Remember that lock collars should be
tightened in the direction of rotation and
loosened opposite to the direction of rotation.
Loosen the set screws in the lock collars and
using a suitable drift or punch, tap the lock
collar to loosen. The bearing should now slip
from the shaft. It may be necessary to remove
the dimples left by the set screws, similar
marks or rust, before the bearings can be
removed.
11. The sheave is removed from the crankshaft by
removing the lock screws from the tapered
hub, and inserting them in the jacking holes.
By exerting equal pressure with each screw
the joint is “cracked” to allow the sheave to be
removed.
12. Reassemble the sheave, crankshaft, pillow
blocks and connecting rods, but do not tighten
the pillow block lock collars or the tapered
bushing to the sheave at this time, to allow for
alignment on final assembly.
13. Slide the assembly down the conveyor and
into position to complete the assembly using
steps 7 and 8 of the Cutter Drive V Belt
Replacement instructions on page 5-04.
14. Make sure the crankshaft is properly lined up
with the connecting rods and the cutting blade
arms, and lock up the lock collars on the pillow
blocks. Tighten the set screws.
15. Using a suitable straight edge, line up the
sheaves of the cutter drive motor and the
crankshaft, and tighten the lock screws in the
tapered hub. (allow for slight movement in lock
up).
CAUTION
IF ADJUSTMENTS OR REPAIRS MUST BE DONE
WITH THE CONVEYOR LIFTED, USE THE LIFT
SUPPORT AS SHOWN ON PAGE 5-01, TO PREVENT
INJURY DUE TO ACCIDENTAL RELEASE OF THE
LIFT MECHANISM.
16. Adjust the belt tension as described on page 3-11
Replace the safety cover on the housing, and
tighten all connections.
17. Remove the lift support, and install in the storage
position.
18. Remember to check the belt tension during the
break-in of the belts.