Multiquip b46s90 manual Spark arrester cleaning, Blade Pitch Adjustment Procedure

maintenance

spark arrester cleaning

Clean the spark arrester every 6 months or 100 hours.

1.Remove the 4 mm screw (3) from the exhaust deflector, then remove the deflector. See Figure 46.

2.Remove the 5 mm screw (4) from the muffler protector, then remove the muffler protector.

3.Remove the 4 mm screw from the spark arrestor, then remove the spark arrester.

Figure 46. Spark Arrester Removal

4.Carefully remove carbon deposits from the spark arrester screen (Figure 47) with a wire brush.

WIRE

BRUSH

SPARK

ARRESTER

SCREEN

Figure 47. Cleaning The Spark Arrester

5.If the spark arrester is damaged and has breaks or holes, replace with a new one.

6.Reinstall the spark arrester and muffler protector in reverse order of disassembly.

Blade Pitch Adjustment Procedure

The maintenance adjustment of blade pitch is an adjustment that is made by a bolt (Figure 48) on the arm of the trowel arm lever. This bolt is the contact point of the trowel arm lever to the lower wear plate on the thrust collar. The goal of the adjustment is to promote consistent blade pitch and finishing quality. Adjustments are made by tightening or loosening the blade pitch adjustment bolt.

BLADE PITCH

ADJUSTMENT

BOLT

TROWEL LEVER

FINGER

TROWEL

ARM

SPIDER

PLATE

TROWEL

BLADE

Figure 48. Blade Pitch Adjustment Bolt

Watch for the following indications when determining if blade pitch adjustments are necessary:

•Is the machine wearing out blades unevenly, (i.e. one blade is completely worn out while the others look new)?

•Does the machine have a perceptible rolling or bouncing motion when in use?

•Look at the machine while it is running, do the guard rings “rock up and down” relative to the ground?

If it is determined that blade pitch adjustments are required do the following:

1.Place the trowel on a flat, level area free of dirt and debris.

NOTICE

Before any blade pitch adjustments can be made it is essential to have a clean level area free of dirt and debris to test the trowel. Any unlevel spots in the floor or debris under the trowel blades will give an incorrect perception of adjustment. Ideally, a 5 x 5 ft. (1.5 x 1.5 meter), three-quarter inch (19 mm) thick FLAT steel plate should be used for testing.

page 32 — b46S90 WALK-BEHIND TROWEL • operation and parts manUAL — rev. #0 (06/13/13)