Oil Pump; Liquid Cooling System - Arctic Cat HDX CREW 2017 Service Manual

5. Tighten the hardware securing the hold-down straps
(from steps 2-3) securely.
6. Connect the vent hose (A) and gasline hose (B) to the
proper fittings; then connect the fuel pump/fuel level
sensor connector (C) to the main harness.
HDX259A
7. Position the rear floorboard into the vehicle and
secure with the appropriate hardware; then install the
seat base, seat back, and rear seat.

Oil Pump

 NOTE: Whenever internal engine components wear
excessively or break and whenever oil is contami-
nated, the oil pump should be replaced.
TESTING OIL PUMP PRESSURE
NOTE: The engine must be warmed up to operating

temperature (cooling fan cycling) for this test.
1. Remove the rear seat, seat back, and seat base.
2. Using a suitable "T" fitting, connect Oil Pressure
Test Kit to the oil fitting and hose. Tighten all clamps
securely.
 NOTE: Some oil seepage may occur when installing
the oil pressure gauge. Wipe up oil residue with a
cloth.
3. Block the wheels, place the transmission in neutral,
and start the engine. Allow the engine to warm up to
operating temperature (with cooling fan cycling).
4. Connect a suitable tachometer or use the on-board
diagnostics function in the gauge (see EFI Diagnos-
tic System). With the engine running at 3000 RPM,
the pressure gauge must show 0.7-1.4 kg/cm
psi).
5. Remove the test kit and tachometer from the vehicle
and install the oil hose. Tighten the clamps securely.
6. Install the rear seat base, seat back, and seat.
 NOTE: If the oil pressure is lower than specified,
check for an oil leak, damaged oil seal, or defective oil
pump.
NOTE: If the oil pressure is higher than specified,

check for too heavy engine oil weight (see General
Information/Foreword - Gasoline - Oil - Lubricant),
clogged oil passage, clogged oil filter, or improper
installation of the oil filter.
REMOVING/DISASSEMBLING
1. Remove the oil pump from the engine (see Remov-
ing Right-Side Components in the Engine/Transmis-
sion section).
2. Remove the Phillips-head screw on the back side of
the pump and separate the pump housing and cover.
Note the position of the inner and outer rotors and
alignment pin for assembly.
3. Remove oil pump components.
CLEANING AND INSPECTING
1. Clean all oil-pump components.
2. Inspect the rotors for scoring and gouges.
3. Inspect the alignment pin, driveshaft, and driven
sprocket for damage.
4. Inspect the pump housing and cover for cracks or
damage.
ASSEMBLING/INSTALLING
1. Place the rotors into the pump housing making sure
the alignment pin is in the groove of the rotor.
2. Place the cover onto the pump housing.
3. Secure the pump cover with the Phillips-head screw
coated with red Loctite #271. Tighten to 8 ft-lb.
4. Install the oil pump into the engine (see Removing
Right-Side Components in the Engine/Transmission
section).

Liquid Cooling System

When filling the cooling system, use premixed Arctic Cat
Antifreeze. While the cooling system is being filled, air
pockets may develop; therefore, open the bleed screw on
the thermostat housing to allow air to bleed from the
cooling system. When clear coolant (no bubbles) is pres-
ent, tighten the bleed screw securely; then fill the cooling
system to the bottom of the stand pipe in the radiator
neck. Run the engine for five minutes after the initial fill,
shut the engine off, and then "top-off" the cooling system
to the bottom of the stand pipe in the radiator neck. This
2
(10-20
procedure may need to be repeated.
NOTE: Use a good quality, biodegradable glycol-

based, automotive-type antifreeze. When filling the
cooling system, use a coolant/water mixture which
will satisfy the coldest anticipated weather conditions
of the area in accordance with the coolant manufac-
turer's recommendations.
Never check the coolant level when the engine is hot or
the cooling system is under pressure.
! WARNING
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