Multiquip HPLA46411H, HPHA46411H Bronze Bushings Trowel Blade Removal, Trowel Arm Flatness Test

HPLA/HPHA-SERIES 46"TROWEL — MAINTENANCE (TROWEL)

3.Should the trowel arm inserts (bronze bushing ) come out with the trowel arm, remove the bushing from the trowel arm andsetasideinasafeplace.Ifthebushingisretained inside the spider plate, carefully remove the bushing.

4.Examine the bronze trowel arm bushing insert (Figure 46), clean if necessary.Replace bushing if out of round or worn.

Figure 46. Bronze Bushings

Trowel Blade Removal

1.Remove the trowel blades from the trowel arm by removing thethreehexheadbolts(Figure 47)fromthetrowelarm.Set blades aside.

Figure 47. Trowel Blades

2.Wirebrushany build-up of concrete from all six sides of the trowel arm. Repeat this for the remaining three arms.

Trowel Arm Flatness Test

1.Usingapieceof3/4inchthicksteelplateoranysurfacewhich is true and flat, check all six sides of each trowel arm for flatness.

2.Check each of the six sides of the trowel arm (hex section only) using a ten thousands of an inch (max.) feeler gauge (Figure 48) between the flat of the trowel arm and an ex- tremely flat test surface.

Figure 48. Trowel Arm Flatness Test

3.If the trowel arm is found to be uneven or bent, replace the trowel arm. A bent trowel will not allow the trowel to operate in a smooth fluid rotation.

4.Next,checkeachofthesixsidesof theroundmachinedshaft sectionofthetrowelarm.Eachsectionshouldhavethesame clearance betweentheroundofthetrowelarmshaftandthe testsurface.

Trowel arms can be damaged by rough handling or by striking

NOTE exposed plumbing or forms while in operation. ALWAYS look-out for objects which might cause damage to the trowel arms.

PAGE 34 — HPLA/HPHA-SERIES 46" WALK-BEHINDTROWEL— OPERATION AND PARTS MANUAL — REV. #6 (07/06/10)