SCT SERIESTROWEL — MAINTENANCE

3.Should the trowel arm inserts (bronze bushing ) come out with the trowel arm, remove the bushing from the trowel arm andset asideinasafeplace. If thebushingisretained inside the spider plate, carefully remove the bushing.

4.Examine the bronze trowel arm bushing insert (Figure 38), and clean if necessary. Replace the bushing if out-of-round or worn.

Figure 38. Bronze Bushings

Trowel Blade Removal

1.Remove the trowel blades from the trowel arm by removing the hex head bolts (Figure 39) from the trowel arm. The 36" modelwillhavetwohexheadboltsperarmandthe 46"model will have three hex head bolts per arm. Set blades aside.

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 40) between the flat of the trowel arm and an ex- tremely flat test surface.

 

Figure 40. 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

Figure 39. Trowel Blades

clearance betweentheroundofthetrowelarmshaftandthe

testsurface.

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

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 30 — SCT SERIES WALK-BEHIND TROWEL— PARTS & OPERATION MANUAL — REV. #4 (04/02/07)

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Stow SCT46, SCT36 operation manual Bronze Bushings Trowel Blade Removal, Trowel Arm Flatness Test