Burnishing System
10
Service Manual – PBU Propane Floor Burnisher
Troubleshooting
Problem
Cause
Correction
• Burnishing pad turns
slow
• Machine seems
underpowered
When the drive belt slips
the pad will rotate slower
than normal. Even though
this doesn’t actually affect
the engine, it can seem
like the engine has lost
power.
• Inspect the drive belt for glazing (smooth glassy
surface on the tapered faces). Replace the drive
belt if glazed.
• Inspect the belt tensioner for proper operation,
and that the drive belt appears to be properly
tensioned. Clean or replace the tensioner if it
cannot maintain proper belt tension.
• If so equipped, inspect the drive clutch for
slipping. See below for more details.
For clutch-equipped
machines, the burnishing
pad does not engage, is
slow to engage, sporadic,
or turns slowly.
A problem with the clutch
will present itself with
one of these symptoms.
Either the clutch is faulty
or it is not getting a proper
electrical connection.
• See below for troubleshooting.
Clutch Circuit Troubleshooting
1 Check that the battery voltage is at least 12 volts If
below 12 volts, troubleshoot the battery and charging
system first.
2 Disconnect the clutch cable connector and measure
the resistance of the coil If the resistance is outside
of the range of 2 5 to 3 1 ohms, replace the coil
3 Next, check for an open circuit with the key switch in
the on-position and the clutch switch engaged This
can be completed with the clutch cable unplugged for
easier access to voltage test points. You should find:
• 12 volts between the 2 contacts in the clutch
connector
• 12 volts between either connector at the clutch
switch and a chassis ground point
4 Reconnect the clutch connector and look for a high
resistance path (excessive voltage drop) Repeat
clutch connected. If any of the voltages are significantly lower
than the previous measurements, there is a poor or corroded
connection in the wiring
5 If no electrical problems were found, remove the clutch as
described on page 13
12V
12V
3Ω
Clutch
Connector
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