Tennant t500, Service Information Manual

Page: 136 / 146

136 T500 9015504 01-2018
SERVICE
FOR SAFETY: Before leaving or servicing machine,
stop on level surface, turn off machine, remove
key, and set parking brake if equipped.
FOR SAFETY: When servicing machine, Disconnect
battery connection and charger cord before
working on machine.
ABW PUMP NOT PRIMING (AIR IN THE SYSTEM)
1. Turn the key to the OFF position.
2. Disconnect the hoses at the quick disconnect
connector.
TROJAN
TAB
3. Turn the key to the ON position.
4. Observe for water to begin pumping out from the
hoses.
5. If water is pumping from the hoses, turn the key to
the OFF position, reconnect the hoses, turn key to
ON position, and observe panel for a fault code.
If there is no fault code, the machine is again ready
for use.
If there is a fault code, proceed to the following
steps to eliminate air from the ABW system.
6. Remove the drain cap from the molded hose to
purge air from the system. Allow the water to drain
until there is a steady stream. The drain cap is
located behind the front scrub head cover and
directly below the ABW tank.
7. Reinstall the drain cap onto the molded hose.
8. Add distilled water to the battery watering system
tank.
9. Verify pump is functioning and the fault is cleared.
NOTE: If necessary, can also perform freeze protection
procedure to start over with an empty tank. See
FREEZE PROTECTION in MAINTENANCE section of
this manual.