PAGE 28 — CA4HM WALK-BEHIND TROWEL — OPERATION MANUAL — REV. #3 (10/28/10)
Figure 30. Trowel Arm Adjustment Setup
Figure 31. Trowel Arm Adjustment Fixture Components
3. Unscrew the locking bolts on the adjustment tool and place
the trowel arm into the fixture channel as shown in Figure 31
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.
4. Use an allen wrench to tighten the locking bolts securing the
trowel arm in place.
5. Adjust the bolt "distance" shown in Figure 29 to match one
of the arms. For a CA4HM trowel arm, this distance will be
approximately 5/16" (7.938mm). The other arms will be
adjusted to match this distance.
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.
Re-Assembly
1. Clean and examine the upper/lower wear plates and thrust
collar. Examine the entire spider assembly. Wire brush any
concrete or rust build-up. 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 damage
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. Re-install the blades onto the trowel arms.
9. Install stabilizer ring onto spider assembly.
10. Lubricate all grease points (zerk fittings) with premium
"
Lithum 12"
based grease, conforming to NLG1 Grade #2
consistency.
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.
1
Arm
2
Trowel Arm Lever
3
Fixture Arm
4
Adjustment Bolt
5
Distance = .010 Inch
6
Adjustment Bolt
7
Trowel Arm Adjustment Fixture
8
Locking Bolts
9
Shim
MAINTENANCE
