Multiquip HHXG5 User Manual

Engine running rough or not at all.

Stop switch malfunction?

Make sure that the stop switch is functioning when the 
operator is seated. 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 
fi lter is not clogged.

Ignition?

Check to ensure that the ignition switch has power and 
is functioning correctly.

Safety stop switch not functioning.

Bad contacts?

Replace switch. 

Loose wire connections?

Check wiring. Replace as necessary.

Other problems?

Consult engine manufacturer’s manual.

Trowel bounces, rolls concrete, or makes uneven 
swirls in concrete.

Blades?

Make sure blades are in good condition, not excessively 
worn. Finish blades should measure no less than 2 
inches (50mm) from the blade bar to the trailing edge, 
combo blades should measure no less that 3.5 inches 
(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 fi eld adjustment tool 
is available for height adjustment of the trowel arms 
(contact Parts Department).

Bent trowel arms?

Check the spider assembly for bent trowel arms. If one 
of the arms is even slightly bent, replace it immediately.

Trowel arm bushings?

Check the trowel arm bushings for tightness. This can 
be done by moving the trowel arms up and down. If 
there is more than 1/8 inch (3.2 mm) of travel at the 
tip of the arm, the bushings should be replaced. All 
bushings should be replaced at the same time.

Thrust collar?

Check the fl atness of the thrust collar by rotating it on 
the spider. If it varies by more than 0.02 inch (0.5 mm) 
replace the thrust collar.

Thrust collar bushing?

Check the thrust collar by rocking it on the spider. If it 
can tilt more than 1/16 inch (1.6 mm) - as measured at 
the thrust collar O.D., replace the bushing in the thrust 
collar.

Thrust bearing worn?

Check the thrust bearing to see that it is spinning freely. 
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 inch (0.08 mm) 
out of round at the spider attachment point.

Yoke?

Check to make sure that both fi ngers 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.