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TROUBLESHOOTING & REPAIR
F-63 F-63
RANGER 8
REASSEMBLY PROCEDURE
NOTE: Lincoln Electric recommends that a new
bearing (Lincoln part #M9300-85) be installed
when you replace the rotor and blower assem-
bly.
1. Clean the tapered engine crankshaft. Slide
the rotor onto the shaft.
2. Insert the rotor thru-bolt, and with the
torque wrench tighten the bolt to 50 ft lbs.
3. Support the engine/rotor assembly with the
chain hoist. Fit the rotor into the stator
frame, being careful not to damage the
rotor core against the stator. The bearing
will seat into its race about half way.
4. Insert the four bolts and lock washers that
hold the engine to the stator. With the
9/16” wrench, draw the bolts up evenly in
order to seat the bearing properly. Tighten
to 22 ft-lb. moving diagonally from bolt to
bolt.
5. Check the rotor-stator air gap with the .017
feeler gauge. The measurement is taken at
the blower end of the rotor before the fan is
reinstalled. Turn the rotor with a pair of
locking pliers as necessary so that the rotor
“iron” is up to take the measurement. (The
rotor has two flat sides, which are not mea-
sured for air gap.) Slide in the gauge. Then
rotate the shaft 180 degrees and measure
again. If the gauge does not clear, loosen
the four engine/stator bolts; retighten the
bolts and recheck the air gap. Repeat until
the proper .017 minimum air gap is
achieved.
6. Fasten the ground lead to the right engine
mounting bolt and install both bolts.
7. Install the brush holder bracket back into
the stator frame. Refer to the topic “Brush
Removal and Replacement” in this section
of the manual.
8. Attach leads to the oil pressure switch refer
to wiring diagram. Replace any cut cable
ties.
9. Unplug the fuel tank connection and fuel
hose and connect them.
10. Connect the idle linkage to the idler rod.
Snap the plastic clip back into place.
11. Connect the engine choke cable at the
position marked during disassembly.
12. Screw the blower fan back onto the end of
the rotor shaft. Be sure the washer is in
place and hand tighten the fan only.
13. Reposition the vertical fan baffle and secure
it with the two screws.
13A. (For Onan Engine only) Install the muffler
support hardware on the Onan engine.
14. Install the two cowling covers at the rear of
the stator.
15. Connect the black plug in front of the fuel
tank fill spout.
16. Connect the leads to the starter solenoid
and replace any cable ties cut during disas-
sembly.
17. Install the battery. Connect the positive
battery cable, then the negative battery
cable. BE SURE TO CONNECT THE POS-
ITIVE BATTERY CABLE FIRST.
18. Replace the battery cover.
19. Reinstall the case side, fuel cap, lift bail
gasket, and case top. Connect the spark
plug wires.
20. Conduct the “Retest after Repair” proce-
dure, the following topic in this section of
the manual.
ENGINE/ROTOR REMOVAL AND
REPLACEMENT (KIT S20788) (continued)