Ec25Pf/Ec28Pf Engines Disassembly - Polaris Magnum 2x4 Service Manual

ENGINE
EC25PF/EC28PF Engines
Disassembly
1. Remove the flywheel nut and flywheel with Flywheel
Puller (PN 2871043). Remove stator assembly.
2. Remove cylinder head and cylinder. Remove piston pin
clips. Use Piston Pin Puller (PN 2870386) to remove
piston pin from piston.
3. Inspect connecting rod small end and bearing; piston,
piston pin, cylinder bore as shown on page 3.33 - 3.34b.
4. Remove the crankcase half attaching bolts. Heat
crankcase in the bearing support areas. After applying
heat, tap on PTa end and magneto end to separate
case half from crankshaft.
5. After removing the crankshaft, thoroughly clean the
bearings and lubricate. Check bearing condition by
pressing on and rotating the outer race (A). If the
bearing(s) feel rough they must be replaced. Check the
crankshaft runout by sliding a bearing onto the PTa end
(8) and clamping the shaft into the special holding
fixture (PN 2870710). The shaft should be straightened
to
.002/1
(.05 mm) or less.
10/96 3.12
o
o
u
Polaris Industries Inc.