Polaris A12MH46AX Service Manual page 134

CARBURATION AND FUEL SYSTEM
1. Disconnect battery.
2. Remove seat, side covers and front cab to gain
access to the fuel pump. See chapter 5.
3. Ensure that static has been discharged from you by
touching a ground source such as the engine or
frame.
4. Disconnect the sending unit electrical harness.
5. Place shop towel under fuel sending unit fitting and
remove the hose clamp.
NOTE: A small amount of fuel may come out of the
fuel line or tank. Properly drain fuel into a suitable
container.
6. Be sure the top of the fuel tank is clean. If it requires
cleaning, hand wash the top of the tank to ensure no
debris will enter the fuel system when the fuel sending
unit is removed.
CAUTION
Failure to clean area around fuel pump may lead
to debris entering the fuel tank during service.
Excessive debris in fuel tank may cause
premature wear of fuel pump and/or clogging
of internal fuel filters.
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9923412 - 2012 Sportsman 400/500 and EFI Tractor Service Manual
© Copyright 2011 Polaris Sales Inc.
7. Place the Fuel Pump Service Tool (PU-50326) over
the fuel pump PFA nut. Using a 1/2" drive ratchet or
breaker bar, loosen and remove the PFA nut. Discard
the PFA nut and use a new PFA nut upon
reinstallation of the fuel sending unit.
PFA Nut
NOTE: Apply downward force on the sending unit
flange while removing the PFA nut.
8. Carefully lift the sending unit out of the fuel tank. As
the sending unit assembly is being removed, be
aware of float arm and pre-filter. Hold the float arm to
the sending unit body as you lift and tilt the sending
unit to ensure that the float arm is not bent when
removed from the tank.
9. Transfer sending unit to a suitable container capable
of safely holding fuel.
10. Inspect the inside of the fuel tank for debris (may
require flashlight and mirror). If debris like mud or sand
is present, fuel tank should be flushed and cleaned out
prior to installation of new sending unit assembly.
IMPORTANT: It is recommended to remove the fuel
tank from the vehicle and rinse it with a small amount
of clean fuel. Do not use water or any other chemicals
to remove debris.
11. Remove new sending unit assembly, gasket and PFA
nut from packaging. Use care not to bend float arm
during un-packaging. Do not lift or sending unit
assembly by the float arm.
12. Use cleaning wipes provided to clean fuel tank
surface and threads. Remove all debris, grease and
oil. Allow surfaces to dry completely.
PU-50326