Multiquip B46-SERIES - Manual (Page 38)

PAGE 38 — B-46 WALK-BEHIND TROWEL • OPERATION AND PARTS MANUAL — REV. #8 (05/08/12)
TROUBLESHOOTING (TROWEL)
TABLE 6. TROUBLESHOOTING
SYMPTOM POSSIBLE PROBLEM SOLUTION
Engine running rough or not at all.
Engine ON/OFF Switch in "OFF"
position or malfunctioning? Make sure that the Engine ON/OFF Switch is the "ON" position.
Check contacts. Replace switch if necessary.
Fuel?
Look at the fuel system. Make sure there is fuel being supplied to
the engine. Check to ensure that the fuel filter is not clogged.
Ignition? Check that the ignition switch has power and is functionin correctly.
Loose wire connections? Check wiring. Replace or repair as necessary.
"Kill" Switch malfunction?
Ensure switch is in the "ON" position. Check wiring/connections.
Check contacts. Replace switch if defective.
If trowel “bounces, rolls concrete,
or makes uneven swirls in
concrete”.
Blades?
Make certain blades are in good condition, not excessively worn.
Finish blades should measure no less than 2" (50mm) from the
blade bar to the trailing edge, combo blades should measure no
less that 3.5" (89mm). Trailing edge of blade should be straight and
parallel to the blade bar.
Pitch adjustment?
Check that all blades are set at the same pitch angle as measured
at the spider. A field adjustment tool is available for height
adjustment of the trowel arms. (Contact Parts Dept.)
Bent trowel arms?
Check the spider assembly for bent trowel arms. If one of the arms
is even slightly bent, replace it immediately.
Spider?
Check fit of arms in spider. This can be done by moving the trowel
arms up and down. If there is more than 1/8" (3.2 mm) of travel at
the tip of the arm, the spider and arms should be replaced.
Thrust collar?
Check the flatness of the thrust collar by rotating it on the spider. If
it varies by more than 0.02" (0.5 mm) replace the thrust collar.
Thrust collar?
Check the thrust collar by rocking it on the spider. If it can tilt more
than 3/32" (2.4 mm) [as measured at the thrust collar O.D.],
replace the thrust collar.
Thrust bearing worn?
Check the thrust bearing to see that it is spinning free. Replace if
necessary.
Machine has a perceptible rolling
motion while running.
Main shaft?
The main output shaft of the gearbox assembly should be checked
for straightness. The main shaft must run straight and cannot be
more than 0.003" (0.08 mm) out of round at the spider attachment
point.
Yoke?
Check to make sure that both fingers of the yoke press evenly on
the wear cap. Replace yoke as necessary.
Blade Pitch?
Check to ensure that each blade is adjusted to have the same
pitch as all other blades. Adjust per maintenance section in
manual.