Install Mag Bearing; Check Pto Bearing; Remove/Install Pto Bearing - Generac Power Systems GTV-990 Manual

Figure 10-6. Check Mag Bearing
31.75mm±0.1mm [1.25"±0.004"]
Ø37.9mm± Ø1.492"±0.004"]
Ø41.1mm±0.1mm [Ø
Figure 10-7. Mag Bearing Driver

INSTALL MAG BEARING:

1. Place Crankcase on a press, seal side down.
a. Make sure that the crankcase is supported by the seal boss.
2. Set the new bearing in the crankcase with the notch up
and the oil holes lined up with the passages in the
crankcase.
3. Carefully slide the bushing driver into the bearing and
press the bearing in until it is 0.25-1.27mm (.01-.05")
below the surface.
4. Remove any material left in the oil passage.
5. Install new oil seal with sealing lip facing in.
a. Press oil seal until flush with crankcase.
2" MIN
±0.004"]
SECTION 10: CYLINDER & CRANKCASE COVER

CHECK PTO BEARING

The PTO bearing must be replaced if it is damaged or if it
measures larger than 42.25mm (1.663") in diameter (see
Figure 10-8).
The diameter of the crankshaft may also make it necessary
to replace the bearing. See Section 11 for the crankshaft mea-
surement details.
Figure 10-8. Check PTO Bearing
44.5mm±0.1mm [1.752"±0.004"]
Ø45.1mm± Ø1.776"±0.004"]
Ø41.9mm±0.1mm [Ø
Figure 10-9. PTO Bearing Driver

REMOVE/INSTALL PTO BEARING:

The removal and installation procedure for the PTO bearing
is the same as for the mag bearing. See Figure 10-9 for the
bearing driver used in this procedure.
10-3
2" MIN
±0.004"]