Nilfisk-Advance 21KBCAT Operator'S Manual Download

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ENGLISH / A-15

FORM NO. 56091024 - PBU Propane Stripper -

A-15

TROUBLESHOOTING

When troubles occur, be sure to check the simple causes which at

rst, may seem too obvious to be considered. For example, a starting problem

could be caused by fuel starvation due to an empty propane cylinder or an unopened service valve. If you don’t check for this, starter burnout
could result.
1.

EXCESSIVE VIBRATION -

Look for the following possibilities:

(a) Pad is off center. Remove and reinstall.

(b) Pad Driver is bent or cracked. (Possibly from striking a curb or bolt in the

oor.) Replace immediately with a new part only.

er and dipstick. Grip Pad Driver and move

up, down and from side to side to check for slack in the bearings. If this is the case, then to effect a proper repair, the bearings should be
replaced and possibly the shaft. Contact an authorized service center.

(d) Check to see if the bolts on shaft housing are tight. Look to see if the nuts, bolts and spacers on the Flex Coupler Assembly are all in
place and tight. Contact an authorized service center.

ENGINE STARTS AND IDLES, BUT WILL QUIT AS THE THROTTLE IS ADVANCED -

It is possible that the propane tank’s service valve

is faulty. To check for this, close the valve completely and then reopen very slowly while you listen for a “click” when the gas begins to travel
through the valve. If you hear this very slight noise, then what is happening is the valve is only partially opening. This allows enough gas
through to start and idle the engine, but not enough for full throttle operation. As the throttle is increased, allowing more air to enter the
intake, the engine will quit from fuel starvation. Call your dealer for instructions on where to have the service valve replaced. Meanwhile,
to get by, you can continue to open the service valve until you don’t hear a “click” and then the engine will run normally. IF IT DOES NOT,
contact an authorized service center.

THE BUFFER SEEMS TO RUN WELL BUT DIES DOWN WHEN THE PAD IS PLACED ON THE FLOOR OR SOON THEREAFTER -

Check for the same problem as in #2.

EXCESSIVE NOISE FROM UNDER BUFFER -

If this problem has developed after use of the machine from new, then the

rst place to check

is the Automatic Tensioner. As a new belt wears in, it naturally stretches a bit and the tensioner will begin to rattle. Place the buffer on its side
(with the muf

er down) and reset by taking up the slack in the belt and tighten the Automatic Tensioner.

STARTER WILL HARDLY TURN THE ENGINE OVER or THE SOLENOID JUST CLICKS ON 12 VOLT OPTION MODELS -

The battery

is likely low in charge. This can be remedied by recharging the battery using a 12 volt battery charger at 4-12 amperes. The battery is
located under the frame at the rear of the buffer. The positive post is the one with the RED cable attached to it. Follow the instructions that
came with the battery charger. REMINDER: this will continue to happen unless the buffer’s engine is run for suf

cient time between starts to

recharge the battery.

ENGINE BACKFIRES LOUDLY AND REGULARLY SUDDENLY -

Check the sparkplug boots. One of them is likely cracked, possibly due

to contacting a corner of a shelf or a door frame. Remove the sparkplug lead from the sparkplug and replace the boot with a new one. The
engine should now run normally. IF IT DOES NOT, contact an authorized service center.