3
9926806 R03 - 2015 - 2016 RANGER ETX / 570 2-SEAT 2015 - 2016 RANGER 570 CREW Service Manual
© Copyright Polaris Industries Inc.
3.77
2. Remove the lower crankcase fasteners
q
.
3. Separate crankcase halves by tapping with a soft
faced hammer in reinforced areas and lift the lower
crankcase half off the upper crankcase half.
NOTE
The cylinder head studs
w
must be replaced any time
the cylinder head nuts are loosened.
Use a commercially available stud removal tool. The
stud thread pitch is M8 x 1.25.
TORQUE
Cylinder Head Studs:
13 ft-lbs (17 Nm) (Replacement required)
CRANKSHAFT REMOVAL
1. Remove the cylinder head.
2. Remove the cylinder and piston.
3. Remove the stator cover and flywheel.
4. Remove the water pump cover and water pump
impeller.
5. Remove the balance shaft assembly.
6. Remove the engine oil sump cover.
7. Separate the engine case halves.
8. Place the upper engine case cylinder side down and
lift the crankshaft assembly from the engine.
CRANKSHAFT INSPECTION
NOTE
The connecting rod uses plain bearings. The
connecting rod bearings are not serviceable. If ANY
excessive wear or movement is present or if the rod
does not rotate on the crankshaft freely, the crankshaft
assembly must be replaced.
1. Use a feeler gauge to measure the connecting rod
big end side clearance
q
.
Connecting Rod Big End Side Clearance:
0.00590-.01771″ (.15 - .45 mm)
2. Measure the connecting rod small end I.D.
w
.
Small End I.D. Standard:
.7086 - .709″ (18.000 - 18.018 mm)
Service Limit: .710″ (18.036 mm)
ENGINE / COOLING SYSTEM
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