PAGE 46 — PRO46 SERIES WALK-BEHIND TROWEL • OPERATION AND PARTS MANUAL — REV. #1 (8/20/15)
MAINTENANCE
TROWEL ARM LEVER ADJUSTMENT
The easiest and most consistent way to adjust the trowel
arm lever is to use the Trowel Arm Adjustment Fixture
(P.N. 1817).
As each trowel arm is locked into the fixture, the arm bolt
is adjusted to where it contacts a stop on the fixture. This
will consistently adjust all of the trowel arms, keeping the
finisher as flat and evenly pitched as possible.
This fixture will allow consistent adjustment of the trowel
arm lever. It comes with all the hardware necessary to
properly accomplish this maintenance and instructions on
how to properly utilize this tool. Adjusting the trowel arm
lever without a fixture requires a special talent.
Perform the following procedure when adjusting the trowel
arm lever:
1. Unscrew the locking bolts on the adjustment fixture and
place the trowel arm (lever attached) into the fixture
channel as shown in Figure 68.
2. Ensure the fixture arm is in the up position.
3. A thin shim may be required to cover the blade holes on
the trowel arm. Make sure to align the trowel adjustment
bolt with the fixture adjustment bolt.
Figure 68. Trowel Arm Adjustment Fixture
4. Use an allen wrench to tighten the locking bolts
securing the trowel arm in place.
5. Adjust the bolt distance shown in Figure 68 to match
one of the arms. The other arms will be adjusted to
match this distance.
ARM
SHIM
LOCKING
BOLTS
TROWEL ARM
ADJUSTMENT FIXTURE
TROWEL
ARM
LEVER
FIXTURE
ARM
DISTANCE
.010 INCH
ADJUSTMENT
BOLT
ADJUSTMENT
BOLT
6. Loosen the locking nut on the trowel arm lever, then
turn the trowel arm adjusting bolt until it barely touches
(.010") the fixture adjusting bolt.
7. Once the correct adjustment is made, tighten the lock
nut on the trowel arm to lock in place.
8. Loosen locking nuts on the adjustment fixture, and
remove trowel arm.
9. Repeat steps for the remaining trowel arms.
REASSEMBLY
1. Clean and examine the upper/lower wear plates and
thrust collar. Examine the entire spider assembly. Wire
brush any concrete or rust buildup. If any of the spider
components are found to be damaged or out of round,
replace them.
2. Make sure that the bronze trowel arm bushing is
not damaged or out of round. Clean the bushing if
necessary. If the bronze bushing is damaged or worn,
replace it.
3. Reinstall bronze bushing onto trowel arm.
4. Repeat steps 2 -3 for each trowel arm.
5. Make sure that the spring tensioner is in the correct
position to exert tension on the trowel arm.
6. Insert all trowel arms with levers into spider plate (with
bronze bushing already installed) using care to align
grease hole on bronze bushing with grease hole fitting
on spider plate.
7. Lock trowel arms in place by tightening the hex head
bolt with zerk grease fitting and jam nut.
8. Reinstall the blades onto the trowel arms.
9. Install stabilizer ring onto spider assembly.
10. Reinstall lower wear plate, thrust collar and upper wear
ring in the reverse order that they were disassembled
onto the spider shaft. Make sure that there is little or
no lateral movement between the thrust collar and the
spider shaft.
11. Carefully lift the upper trowel assembly, line up the
keyway on gear box main shaft and insert into spider
assembly.
